J/AJ/153/16 Calibrator stars catalog for interferometers (Swihart+, 2017)
A catalog of calibrator stars for next-generation optical interferometers.
Swihart S.J., Garcia E.V., Stassun K.G., Van Belle G., Mutterspaugh M.W.,
Elias N.
<Astron. J., 153, 16-16 (2017)>
=2017AJ....153...16S 2017AJ....153...16S (SIMBAD/NED BibCode)
ADC_Keywords: Interferometry ; Stars, fundamental ; Stars, diameters
Keywords: catalogs - stars: fundamental parameters -
techniques: interferometric
Abstract:
Benchmark stars with known angular diameters are key to calibrating
interferometric observations. With the advent of optical
interferometry, there is a need for suitably bright, well-vetted
calibrator stars over a large portion of the sky. We present a catalog
of uniformly computed angular diameters for 1510 stars in the northern
hemisphere, brighter than V=6 and with declinations
-15°<delta<82°. The median angular stellar diameter is 0.529
mas. The list has been carefully cleansed of all known binary and
multiple stellar systems. We derive the angular diameters for each of
the stars by fitting spectral templates to the observed spectral
energy distributions (SEDs) from literature fluxes. We compare these
derived angular diameters against those measured by optical
interferometry for 75 of the stars, as well as to 176 diameter
estimates from previous calibrator catalogs, finding in general
excellent agreement. The final catalog includes our goodness-of-fit
metrics as well as an online atlas of our SED fits. The catalog
presented here permits selection of the best calibrator stars for
current and future visible-light interferometric observations.
Description:
In order to obtain accurate stellar angular sizes, each star was fit
with a model SED using the fitting routine sedFit, written by A. Boden
(van Belle & von Braun, 2009, Cat. J/ApJ/694/1085; van Belle et al.
2016, Cat. J/AJ/152/16).
We compiled a list of positions, spectral types and visual magnitudes
for ∼3000 bright (Vmag<6) stars in the northern hemisphere with
declinations -15°<δ<82° using the SIMBAD database
(Wenger et al., 2000A&AS..143....9W 2000A&AS..143....9W). We chose a brightness limit
(Vmag<6) given that most visible light interferometers can obtain
scientifically useful data on bright stars. We also removed any stars
which appear in the JMMC bad calibrator list.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 35 6 Comparisons of sedFit angular diameter estimates
for different Pickles spectral template
luminosity classes
table3.dat 70 1510 Angular diameters for 1523 calibrator stars
estimated from the sedFit fitting routine
table4.dat 63 21 Reddening derived using sedFit for 21 OB stars
in the Cep OB3 cloud
table5.dat 35 75 sedFit angular diameters compared to angular
diameters measured by interferometers
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See also:
J/ApJ/694/1085 : Radii of exoplanet host stars (van Belle+, 2009)
J/AJ/152/16 : Bolometric flux estimation for cool evolved stars
(van Belle+, 2016)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Name HD name
11- 15 A5 --- SpType Pickles spectral template
19- 23 F5.3 mas Ang Angular size from SED fitting
25- 29 F5.3 mas e_Ang rms uncertainty on Ang
32- 35 F4.2 --- chi2 Reduced χ square statistic
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Name HD catalog identifier
10- 13 F4.2 mag Vmag V band magnitude, SIMBAD/GCPD
15- 22 F8.3 10+5W/m2 Fbol Bolometric flux, 10+8 erg/cm2/s
24- 30 F7.3 10+5W/m2 e_Fbol Uncertainty in fbol
32- 36 F5.3 mag AV Derived Reddening
38- 42 F5.3 mag e_AV Uncertainty in Av
44- 45 I2 --- Nphot Number of photometric points
47- 51 F5.3 mas Ang Angular size from SED fitting
53- 57 F5.3 mas e_Ang Uncertainty in Ang
59- 62 F4.2 --- chi2 Reduced χ square statistic
64- 71 A8 --- SpType Spectral Type
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Name HD/ALS Object identifier
10- 15 F6.2 10+5W/m2 Fbol Bolometric flux, 10+8 erg/cm2/s
17- 21 F5.2 10+5W/m2 e_Fbol Uncertainty in Fbol
23- 26 F4.2 mag AV Derived Reddening
28- 31 F4.2 mag e_AV Uncertainty in Av
33- 34 I2 --- Nphot Number of photometric points
36- 39 F4.2 mas Ang Angular size from SED fitting
41- 44 F4.2 mas e_Ang Uncertainty in Ang
46- 49 F4.2 --- chi2 Reduced χ square statistic
51- 57 A7 --- SpType Spectral Type
59- 63 F5.3 mag AV-M84 Reddening, Massa and Savage
(1984ApJ...279..310M 1984ApJ...279..310M)
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Name HD catalog identifier
10- 14 F5.3 mas AngLD Angular size from Interferometry, Literature
16- 20 F5.3 mas e_AngLD Uncertainty in Ang-LD
22- 26 F5.3 mas AngSED Angular size from SED fitting
28- 32 F5.3 mas e_AngSED Uncertainty in Ang-sed
34- 35 I2 --- r_AngLD Reference for Ang-LD (1)
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Note (1): Literature Reference for AngLD as follows:
1 = Boyajian et al. (2012ApJ...746..101B 2012ApJ...746..101B)
2 = Boyajian et al. (2012ApJ...757..112B 2012ApJ...757..112B)
3 = Boyajian et al. (2013ApJ...771...40B 2013ApJ...771...40B)
4 = Maestro et al. (2013MNRAS.434.1321M 2013MNRAS.434.1321M)
5 = Ligi et al. (2012A&A...545A...5L 2012A&A...545A...5L)
6 = Challouf et al. (2014A&A...570A.104C 2014A&A...570A.104C)
7 = Mozurkewich et al. (2003AJ....126.2502M 2003AJ....126.2502M)
8 = von Braun et al. (2014MNRAS.438.2413V 2014MNRAS.438.2413V)
9 = Baines et al. (2009ApJ...701..154B 2009ApJ...701..154B)
10 = Baines et al. (2010ApJ...710.1365B 2010ApJ...710.1365B)
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History:
From electronic version of the journal
(End) Prepared by [AAS], Patricia Vannier [CDS] 26-Apr-2017