J/AJ/169/293 Angular diameters of 145 stars from the NPOI (Baines+, 2025)
Vintage NPOI: New and updated angular diameters for 145 stars.
Baines E.K., Clark J.H.I., Kingsley B.I., Schmitt H.R., Stone J.M.
<Astron. J., 169, 293 (2025)>
=2025AJ....169..293B 2025AJ....169..293B
ADC_Keywords: Stars, diameters; Interferometry; Optical; Photometry;
Effective temperatures; MK spectral classification; Reddening;
Stars, masses
Keywords: Stellar astronomy ; Fundamental parameters of stars ;
High angular resolution ; Optical interferometry
Abstract:
We present new or updated angular diameters, physical radii, and
effective temperatures for 145 stars from the Navy Precision Optical
Interferometer (NPOI) data archive. We used data from 1996 to late
2021, and we describe the differences between early and late data,
which hinge upon an update of the beam combiner in 2002. We came
across several subcategories of stars of interest: 13 of our stars are
promising targets for the Habitable World Observatory and therefore
require as much study as possible, and 14 more are asteroseismic
targets and have stellar masses after we combined our radii and
effective temperatures with frequencies of maximum oscillation power
values from the literature. In addition to this, many of the stars
here show measurements to the first null in the visibility curve and
beyond, which is the gateway to determining second-order effects such
as direct measurements of limb darkening. Finally, we consider the
stars in the larger context of previous NPOI measurements and find the
majority (75%) of the angular diameters in the overall NPOI sample
have uncertainties of 2% or less.
Description:
The NPOI is an optical interferometer on Anderson Mesa, near
Flagstaff, Arizona, and has been in operation since 1996. For the
handful of years from 1996 to mid 2002, the original version of the
"Classic" beam combiner was used. It recorded data on one baseline1
per spectrograph, of which there were three, and it observed over 32
spectral channels from 430 to 860nm. Each 2ms data frame was split
into eight temporal bins, and each scan was 90s long. Starting in mid
2002 the NPOI system changed to recording data from 16 channels
(550-860nm) and two spectrographs, using 30s scans. The new procedure
allowed for the simultaneous recording of all 15 baselines but
required the use of 64 temporal bins for each 2ms data frame. The
baseline, which is the distance between two siderostats or telescopes,
goes from a mere 7.2 to 79.4m in this study. Other optical/infrared
interferometers use telescopes but the NPOI uses siderostats, which
are flat mirrors.
Over the last almost 30yr, the NPOI has observed hundreds of stars,
and here we present measurements for 145 of them. The data set
presented here is by far the largest ever published in one place from
the NPOI, totaling very nearly 360,000 data points. The dates of
observations range from 1996 May to when the NPOI temporarily shut
down after 2021 October. All of the scientific targets were observed
alternately with calibrator stars, chosen so that the scientific
target's angular diameter measurement would be only weakly dependent
on the calibrator star's angular diameter determination (Baines+2018,
J/AJ/155/30).
When observing, we made two basic assumptions about the scientific
targets: that they are effectively single, and that they do not rotate
rapidly enough to be oblate and experience gravity darkening
(van Belle+2012, J/other/A+ARV/20.51). A good number of the targets
discussed here do indeed have stellar companions, but in the majority
of cases, those companions are well outside the NPOI's detection
sensitivity.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table2.dat 86 145 Sample star properties
table4.dat 111 1691 Observing log
table5.dat 96 107 Calibrator stars' SED inputs and resulting angular
diameters
table6.dat 102 145 Interferometric results
table7.dat 80 145 Derived stellar parameters
table8.dat 27 35 Stars in the WDS
table9.dat 27 13 Promising HWO targets
table10.dat 60 14 Stellar oscillators
table11.dat 8 120 Zero-crossing stars
fig3/* . 145 Visibility curves in JPG format (Data behind
Figure 3)
--------------------------------------------------------------------------------
See also:
B/pastel : The PASTEL catalogue (Soubiran+, 2016-)
B/wds : The Washington Visual Double Star Catalog (Mason+ 2001-2020)
I/149A : Fifth Fundamental Catalogue (FK5) Part I (Fricke+, 1988)
I/175 : Fifth Fundamental Catalogue (FK5) - Extension (Fricke+ 1991)
I/284 : The USNO-B1.0 Catalog (Monet+ 2003)
I/311 : Hipparcos, the New Reduction (van Leeuwen, 2007)
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
I/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022)
II/62 : Catalogue of Extinction Data (Neckel+, 1980)
II/114 : UV Interstellar Extinction (Savage+ 1985)
II/168 : Homogeneous Means in the UBV System (Mermilliod 1991)
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
II/346 : JMMC Stellar Diameters Catalogue - JSDC. Version 2 (Bourges+, 2017)
II/354 : HIP and TGAS stars reddening and extinction (Gontcharov+ 2018)
III/39A : UV Bright Star Spectrophotometric Catalog (Jamar+, 1976)
III/135A : Henry Draper Catalogue and Extension (Cannon+ 1918-1924; ADC 1989)
III/164 : Catalog of Eq.Widths of Interstellar 217nm Band (Friedemann 1992)
III/232 : STELIB: A library of stellar spectra at R∼2000 (Le Borgne+, 2003)
IV/38 : TESS Input Catalog - v8.0 (TIC-8) (Stassun+, 2019)
IV/39 : TESS Input Catalog version 8.2 (TIC v8.2) (Paegert+, 2021)
V/50 : Bright Star Catalogue, 5th Revised Ed. (Hoffleit+, 1991)
V/137D : Extended Hipparcos Compilation (XHIP) (Anderson+, 2012)
J/A+AS/118/481 : ROSAT all-sky survey catalogue of OB stars (Berghoefer+ 1996)
J/A+AS/117/227 : Dwarf effective temperatures (Alonso+ 1996)
J/A+A/352/555 : Fundamental parameters of stars (Allende Prieto+, 1999)
J/A+A/393/183 : Catalogue of calibrator stars for LBSI (Borde+, 2002)
J/AJ/126/2048 : NStars project: the Northern Sample. I. (Gray+, 2003)
J/AJ/127/1227 : Synthetic Stroemgren photometry (Clem+, 2004)
J/ApJS/152/251 : Indo-US library of coude feed stellar spectra (Valdes+, 2004)
J/A+A/440/305 : Fundamental parameters of fast-rotating B stars (Fremat+, 2005)
J/ApJ/626/446 : Effective temperature scale of FGK stars (Ramirez+, 2005)
J/ApJ/647/312 : FUSE survey of OVI in the Milky Way (Otte+, 2006)
J/MNRAS/367/1478 : Interstellar NaI, TiII & CaIIK obs. (Hunter+, 2006)
J/MNRAS/371/1793 : Metallicity calibrations for UBV photometry (Karatas+, 2006)
J/MNRAS/371/703 : MILES library of empirical spectra (Sanchez-Blazquez+, 2006)
J/A+A/475/1003 : Stellar parameters of G and K giant stars (Hekker+, 2007)
J/ApJS/176/276 : PTI calibrator catalog (van Belle+, 2008)
J/ApJ/700/1299 : Gas-phase element depletions in the ISM (Jenkins, 2009)
J/A+A/501/297 : Effective temperatures of B Supergiants (Zorec+, 2009)
J/ApJ/722/605 : A stellar rotation census of B stars (Huang+, 2010)
J/A+A/522/A79 : Faint, high-Gal-latitude red clump stars (Valentini+, 2010)
J/A+A/529/A75 : Limb-darkening coefficients (Claret+, 2011)
J/A+A/525/A90 : Thick disc vertical properties (Katz+, 2011)
J/MNRAS/414/1227 : Mg/Fe ratio of MILES stars (Milone+, 2011)
J/A+A/531/A165 : MILES atmospheric parameters (Prugniel+, 2011)
J/A+A/525/A71 : Atmospheric parameters for 1273 stars (Wu+, 2011)
J/other/A+ARV/20.51 : Rapidly rotating stars (Van Belle, 2012)
J/ApJS/199/8 : A compilation of interstellar column dens. (Gudennavar+, 2012)
J/ApJ/768/128 : K-band calibrated visibilities of 24 Be stars (Touhami+, 2013)
J/A+A/549/A129 : Equivalent widths of cool stars (Cesetti+, 2013)
J/AJ/150/151 : DSSI obs. of binaries. VI. Measures in 2014 (Horch+, 2015)
J/AJ/150/123 : Catalog of 316 K giant candidates (Rebull+, 2015)
J/MNRAS/459/1170 : Coulour-Period relation for Cepheids (Scowcroft+, 2016)
J/A+A/595/A132 : Be star rotational velocities distribution (Zorec+, 2016)
J/A+A/589/A83 : PCA-based inversion of stellar parameters (Gebran+, 2016)
J/ApJ/826/171 : IR data of debris disk vs metallicity of stars (Gaspar+, 2016)
J/MNRAS/471/770 : Parameters & IR excesses of Gaia DR1 stars (McDonald+, 2017)
J/AJ/155/30 : Fundamental parameters of 87 stars from the NPOI (Baines+, 2018)
J/AJ/156/102 : The TESS Input Catalog & Candidate Target List (Stassun+, 2018)
J/A+A/619/A134 : ATHOS. Flux ratio based stellar parameteriz. (Hanke+, 2018)
J/A+A/623/A72 : Binar. of Hipparcos stars from Gaia pm anom. (Kervella+, 2019)
J/AJ/158/167 : Speckle obs. & orbits of multiple stars (Tokovinin+, 2019)
J/A+A/633/A34 : Lithium in red giant stars (Charbonnel+, 2020)
J/ApJ/889/157 : Ages of FGK stars considering C and O abundances (Chen+, 2020)
J/MNRAS/504/3730 : Synthetic RGB photometry of bright stars (Cardiel+, 2021)
J/AJ/162/198 : Fundamental parameters of 44 stars with NPOI (Baines+, 2021)
J/ApJ/919/131 : Oscillating red giants from the TESS QLP (Hon+, 2021)
J/ApJ/915/13 : 1997-2019 automated B,V phot. of gam Cas (Smith+, 2021)
J/MNRAS/517/2925 : ORB6 binaries in Gaia EDR3 (Chulkov+, 2022)
J/A+A/657/A7 : Stellar & substellar companions from Gaia EDR3 (Kervella+, 2022)
J/A+A/658/A48 : 7 giants/subgiants limb-darkening coeff. (Karovicova, 2022)
J/A+A/657/A7 : Stellar & substellar companions from Gaia EDR3 (Kervella+, 2022)
J/ApJS/266/6 : In the Trenches of the solar-stellar connect. VII. (Ayres, 2023)
J/A+A/683/A161 : Solar-like stars global oscillation propert. (Corsaro+, 2024)
J/ApJS/272/30 : Habitable Worlds Observatory (HWO): 164 targets (Harada+, 2024)
J/A+A/689/A270 : An all-sky cat. of stellar reddening values (Paunzen+, 2024)
J/A+A/682/A145 : Gaia FGK benchmark stars v3 (Soubiran+, 2024)
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 I6 --- HD [432/223047] Henry Draper catalog (III/135A)
identifier
8- 11 I4 --- HR [21/9003] Yale Bright star catalog (V/50)
identifier
13- 16 I4 --- FK5 [2/3799]? Fifth Fundamental catalogue (I/149A,
I/175) identifier
18- 27 A10 --- WDS Washington Double Star (B/wds) identifier
29- 41 A13 --- Name Other name for target
43- 56 A14 --- SpType Spectral Type, from SIMBAD
58- 61 F4.2 mag Vmag [0.03/5.58] V-band magnitude, from Mermilliod,
1991 (II/168)
63- 68 F6.2 mas plx [1.42/284.56] Parallax
70- 73 F4.2 mas e_plx [0.02/2.23] Uncertainty in plx
75- 80 A6 --- r_plx Reference for plx (1)
82- 84 I3 km/s vsini [0/329]? Projected rotational velocity, from
Hoffleit+1964 (V/50)
86 A1 --- Pub [YN] Previously Published? (2)
--------------------------------------------------------------------------------
Note (1): References for parallax are as follows:
CM22 = J/MNRAS/517/2925 (Chulkov+, 2022); 1 occurrence
Gaia18 = I/345 (Gaia DR2, 2018); 3 occurrences
Gaia22 = I/355 (Gaia DR3, 2022); 109 occurrences
vL07 = I/311 (van Leeuwen, 2007); 32 occurrences
Note (2): Flag as follows:
Y = Previously published (83 occurrences)
N = Not previously published (62 occurrences)
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table4.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 I6 --- HD [432/223047] Henry Draper catalog
(III/135A) identifier
8 A1 --- f_HD [*] Flag on HD (column added by CDS) (2)
10- 15 I6 --- Calib [886/222173] Henry Draper catalog
(III/135A) calibrator star identifier
17- 27 A11 "Y:M:D" Date UT date (YYYY-MM-DD)
29- 103 A75 --- Baselines Baselines used (1)
105- 106 I2 --- Nscans [1/39] Number of scans per baseline
108- 111 I4 --- Npoints [6/2010] Number of calibrated V2
(visibility) measurements points
--------------------------------------------------------------------------------
Note (1): Baseline length between telescope pairs as follows:
AC-AE = 18.9m
AC-AN = 22.8m
AC-AW = 22.2m
AC-E2 = 7.2m
AC-E6 = 34.4m
AC-W4 = 8.8m
AC-W7 = 51.3m
AE-AN = 34.9m
AE-AW = 37.5m
AE-E2 = 15.9m
AE-E6 = 15.9m
AE-E7 = 37.1m
AE-W4 = 26.7m
AE-W7 = 64.2m
AN-AW = 38.2m
AN-E2 = 20.0m
AN-E6 = 45.6m
AN-W7 = 66.4m
AW-E2 = 29.1m
AW-E3 = 31.9m
AW-E4 = 34.5m
AW-E6 = 53.3m
AW-E7 = 73.5m
AW-W4 = 14.0m
AW-W7 = 29.5m
E2-E4 = 7.8m
E2-W7 = 58.7m
E3-W4 = 18.6m
E6-W4 = 42.5m
E6-W7 = 79.4m
E7-W7 = 97.5m
Note (2): The flagged observation had a typo in its HD identifier. The original
data has "HD 113208" but it has been corrected to "HD 133208" in this table.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table5.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 I6 --- Calib [886/222173] Henry Draper catalog
(III/135A) calibrator star identifier
8- 18 A11 --- SpType Spectral Type, from SIMBAD
20- 23 F4.2 mag Umag [0.48/6.71] U-band mag, from Mermilliod,
1991 (II/168)
25- 28 F4.2 mag Bmag [1.41/6.07] B-band mag, from Mermilliod,
1991 (II/168)
30- 33 F4.2 mag Vmag [1.64/5.46] V-band mag, from Mermilliod,
1991 (II/168)
35- 38 F4.2 mag Rmag [1.71/5.36] R-band mag, from USNO-B1.0
catalog (Monet+2003, I/284)
40- 43 F4.2 mag Imag [1.84/5.26] I-band mag, from USNO-B1.0
catalog (Monet+2003, I/284)
45- 48 F4.2 mag Jmag [2.15/5.22] J-band mag, from 2MASS
(Cutri+2003, II/246)
50- 53 F4.2 mag Hmag [2.13/5.02] H-band mag, from 2MASS
(Cutri+2003, II/246)
55- 58 F4.2 mag Ksmag [2.07/4.93] Ks-band mag, from 2MASS
(Cutri+2003, II/246)
60- 64 I5 K Teff [4750/29242] Surface effective temperature
66- 69 F4.2 [cm/s2] logg [1.8/5.11] Log, surface gravity, cgs
71- 75 A5 --- Ref Reference for Teff, logg (1)
77- 80 F4.2 mag E(B-V) [0/0.33] Reddening
82- 86 A5 --- r_E(B-V) Reference for E (B-V) (1)
88- 91 F4.2 mas theta-est [0.23/1.5] Estimated angular diameter (2)
93- 96 F4.2 mas e_theta-est [0.01/0.07] Uncertainty in theta-est
--------------------------------------------------------------------------------
Note (1): References for Teff, logg, and E(B-V) values are as follows:
sA23 = J/ApJS/266/6 (Ayres, 2023)
A96 = J/A+AS/117/227 (Alonso+ 1996)
APL99 = J/A+A/352/555 (Allende Prieto+, 1999)
B96 = J/A+AS/118/481 (Berghoefer+ 1996)
C04 = J/AJ/127/1227 (Clem+, 2004)
C21 = J/MNRAS/504/3730 (Cardiel+, 2021)
F05 = J/A+A/440/305 (Fremat+, 2005)
F92 = III/164 (Friedemann 1992)
G03 = J/AJ/126/2048 (Gray+, 2003)
G12 = J/ApJS/199/8 (Gudennavar+, 2012)
G16 = J/A+A/589/A83 (Gebran+, 2016)
GM18 = II/354 (Gontcharov+ 2018)
H06 = J/MNRAS/367/1478 (Hunter+, 2006)
HGM10 = J/ApJ/722/605 (Huang+, 2010)
J09 = J/ApJ/700/1299 (Jenkins, 2009)
J95 = III/39A (Jamar+, 1976)
K19 = J/A+A/623/A72 (Kervella+, 2019)
KAT22 = J/A+A/657/A7 (Kervella+, 2022)
KS06 = J/MNRAS/371/1793 (Karatas+, 2006)
LB03 = III/232 (Le Borgne+, 2003)
MZW17 = J/MNRAS/471/770 (McDonald+, 2017)
N80 = II/62 (Neckel+, 1980)
OD06 = J/ApJ/647/312 (Otte+, 2006)
P07 = 2007astro.ph..3658P 2007astro.ph..3658P (Prugniel+, 2007)
P24 = J/A+A/689/A270 (Paunzen+, 2024)
RM05 = J/ApJ/626/446 (Ramirez+, 2005)
S85 = II/114 (Savage+ 1985)
SB06 = J/MNRAS/371/703 (Sanchez-Blazquez+, 2006)
Sou16 = B/pastel (Soubiran+, 2016-)
T13 = J/ApJ/768/128 (Touhami+, 2013)
V04 = J/ApJS/152/251 (Valdes+, 2004)
VM10 = J/A+A/522/A79 (Valentini+, 2010)
W11 = J/A+A/525/A71 (Wu+, 2011)
Z09 = J/A+A/501/297 (Zorec+, 2009)
vB08 = J/ApJS/176/276 (van Belle+, 2008)
Note (2): The estimated angular diameter is calculated using the method
described in Section 3.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table6.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 I6 --- HD [432/223047] Henry Draper catalog
(III/135A) identifier
8 A1 --- Flag Flag on diameter fit (1)
10- 14 F5.3 mas theta-ud [0.77/8.83] Apparent uniform disk (UD)
angular diameter
16- 20 F5.3 mas e_theta-ud [0.002/0.4] Uncertainty in theta-ud
22- 26 I5 K Teff [3431/35210] Surface effective
temperature
28- 31 F4.2 [cm/s2] logg [0.05/4.6] Log, surface gravity
33- 39 A7 --- Ref Reference for stellar parameters (2)
41- 45 F5.2 [-] [Fe/H] [-0.56/0.3] Metallicity, [Fe/H]
47- 51 A5 --- r_[Fe/H] Reference for FeH (2)
53- 56 F4.2 --- mu-i [0.24/0.86] Initial limb-darkening
coefficient (3)
58- 62 F5.3 mas theta-ld-i [0.8/9.63] Initial limb-darkening angular
diameter
64- 68 F5.3 mas e_theta-ld-i [0.002/0.41] Uncertainty in theta-ld-i
70- 73 F4.2 --- mu-f [0.32/0.86] Final limb-darkening
coefficient (3)
75- 79 F5.3 mas theta-ld-f [0.8/9.7] Final limb-darkening angular
diameter
81- 85 F5.3 mas e_theta-ld-f [0.001/0.42] Uncertainty in theta-ld-f
87- 90 F4.1 % sigtheta [0.1/45.6] Percent uncertainty in
theta-ld-f
92- 96 F5.1 10+6/s MaxSF [28.5/150.7] Maximum spatial frequency
for the diameter measurement,
10+6cycles/second
98- 102 I5 --- Nfit [60/17514] Number of data points in
angular diameter fit
--------------------------------------------------------------------------------
Note (1): Flag as follows:
* = See Section 5 for discussion about potential sources of bias for
this star.
Note (2): References for Teff, logg are as follows:
AF12 = V/137D (Anderson+, 2012)
APL99 = J/A+A/352/555 (Allende Prieto+, 1999)
B02 = J/A+A/393/183 (Borde+, 2002)
C13 = J/A+A/549/A129 (Cesetti+, 2013)
C21 = J/MNRAS/504/3730 (Cardiel+, 2021)
Cha20 = J/A+A/633/A34 (Charbonnel+, 2020)
Che20 = J/ApJ/889/157 (Chen+, 2020)
GRB16 = J/ApJ/826/171 (Gaspar+, 2016)
Gaia22 = I/355 (Gaia DR3, 2022)
H07 = J/A+A/475/1003 (Hekker+, 2007)
H18 = J/A+A/619/A134 (Hanke+, 2018)
K11 = J/A+A/525/A90 (Katz+, 2011)
LB03 = III/232 (Le Borgne+, 2003)
M11 = J/MNRAS/414/1227 (Milone+, 2011)
MZW17 = J/MNRAS/471/770 (McDonald+, 2017)
P07 = 2007astro.ph..3658P 2007astro.ph..3658P (Prugniel+, 2007)
P11 = J/A+A/531/A165 (Prugniel+, 2011)
S18 = J/AJ/156/102 (Stassun+, 2018)
S19 = IV/38 (Stassun+, 2019)
Sco16 = J/MNRAS/459/1170 (Scowcroft+, 2016)
Sou16 = B/pastel (Soubiran+, 2016-)
V04 = J/ApJS/152/251 (Valdes+, 2004)
Z16 = J/A+A/595/A132 (Zorec+, 2016)
Note (3): The initial linear, limb-darkening coefficient, mu-i, is
based on the Teff and logg listed in the table; the final mu-f is
based on the new Teff determination; see Section 4.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table7.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 I6 --- HD [432/223047] Henry Draper catalog
(III/135A) identifier
8- 13 F6.2 Rsun Rad [0.8/426.8] Derived stellar radius
15- 19 F5.2 Rsun E_Rad [0.1/69.5]?=" Upper uncertainty in Rad
21- 26 F6.2 Rsun e_Rad [0.01/107.4] Symmetric or lower uncertainty
in Rad
28- 31 F4.1 % sigRad [0.3/45.6] Percent uncertainty in Rad
33- 39 F7.1 Lsun L [0.6/41422.3] Stellar luminosity
41- 45 F5.1 Lsun e_L [0/298] Uncertainty in L
47- 52 A6 --- r_L Reference for L (1)
54- 59 F6.1 10-9W/m2 Fbol [19.2/2882] Bolometric flux, 10-6erg/s/cm2,
SED fit
61- 64 F4.1 10-9W/m2 e_Fbol [0.2/98] Uncertainty in Fbol
66- 70 I5 K Teff [2285/14159] Final derived stellar
effective temperature
72- 75 I4 K e_Teff [7/1268] Uncertainty in Teff
77- 80 F4.1 % sigTeff [0.1/23] Percent uncertainty in Teff
--------------------------------------------------------------------------------
Note (1): References for L as follows:
AF12 = V/137A (Anderson+, 2012)
Gaia22 = I/355 (Gaia DR3, 2022)
MZW17 = J/MNRAS/471/770 (McDonald+, 2017)
S24 = J/A+A/682/A145 (Soubiran+, 2024)
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table8.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 I6 --- HD [5394/223047] Henry Draper catalog (III/135A)
identifier
8- 12 A5 --- Comp Components of multi-star system
14- 18 F5.2 mag dVmag [1.9/10.5]? V-band magnitude difference in Comp
20- 25 F6.2 arcsec Sep [0/999.9] Separation, in Comp
27 A1 --- Disc Needs Discussion? (1)
--------------------------------------------------------------------------------
Note (1): Some of these systems are large and complex, so we only consider the
innermost binary star pair because the other stars are well outside our
range of detection of 0.86" and dVmag of 3.0. The exceptions to this
are HD 165908 and HD 223047, so they have multiple lines in this
table. See Section 5 for more discussion of the stars that
require it. Flag as follows:
Y = Needs discussion (9 occurrences)
N = Does not need discussion (26 occurrences)
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table9.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 I6 --- HD [9826/165341] Henry Draper catalog (III/135A)
identifier
8- 12 F5.3 Rsun RadNPOI [0.71/2.09] Derived NPOI stellar radius
14- 18 F5.3 Rsun e_RadNPOI [0.01/0.21] Uncertainty in RadNPOI
20- 24 F5.3 Rsun RadHWO [0.77/2.3] Predicted NASA ExEP radius (1)
26- 27 I2 % Diff [0/27] Percentage difference
--------------------------------------------------------------------------------
Note (1): RadHWO is the radius predicted by the "NASA ExEP Mission Star
List for HWO" document, which can be found at:
https://exoplanetarchive.ipac.caltech.edu/docs/2645_NASA_ExEP_Target_List_HWO_Documentation_2023.pdf
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table10.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 I6 --- HD [9408/218452] Henry Draper catalog (III/135A)
identifier
8- 12 F5.2 Rsun Rad [2.03/23.36] Derived stellar radius
14- 17 F4.2 Rsun e_Rad [0.04/0.82] Uncertainty in Rad
19- 22 I4 K Teff [4217/6676] Final derived stellar effective
temperature
24- 26 I3 K e_Teff [8/358] Uncertainty in Teff
28- 32 F5.1 uHz nuMax [8.5/676.0] Frequency of maximum oscillation
power (1)
34- 37 F4.1 uHz e_nuMax [1.1/12.2] Uncertainty in nuMax
39- 42 F4.2 Msun Mass [0.91/2.35] Stellar mass (2)
44- 47 F4.2 Msun e_Mass [0.05/0.37] Uncertainty in Mass
49- 50 I2 % sigMass [5/26] Percent uncertainty in Mass
52- 60 A9 --- Ref Reference (column added by CDS) (3)
--------------------------------------------------------------------------------
Note (1): From Hon+2021 (J/ApJ/919/131) for all the stars except HD 23249,
which is from Corsaro+2024 (J/A+A/683/A161).
Note (2): From the following equation:
(Mass/M☉) = (nuMax/nuMax☉)(Rad/R☉)2(Teff/Teff☉)1/2
Note (3): Two stars are from previous work's samples. References as follows:
B18 = J/AJ/155/30 (Baines+, 2018)
B21 = J/AJ/162/198 (Baines+, 2021)
This work = See Table 2
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Byte-by-byte Description of file: table11.dat
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Bytes Format Units Label Explanations
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1 I1 --- Set [1/2] Zero-Crossing star set (1)
3- 8 I6 --- HD [1013/222404] Henry Draper catalog (III/135A)
identifier
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Note (1): Set as follows:
1 = Zero-crossing stars from this work (69 occurrences)
2 = Zero-crossing stars from previous works (51 occurrences)
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History:
From electronic version of the journal
(End) Prepared by [AAS], Robin Leichtnam [CDS] 23-Feb-2026