J/MNRAS/495/2738 Luminosities of 34 slowly pulsating B stars (Pedersen+, 2020)
Recipes for bolometric corrections and Gaia luminosities of B-type stars:
application to an asteroseismic sample.
Pedersen M.G., Escorza A., Papics P.I., Aerts C.
<Mon. Not. R. Astron. Soc., 495, 2738-2753 (2020)>
=2020MNRAS.495.2738P 2020MNRAS.495.2738P (SIMBAD/NED BibCode)
ADC_Keywords: Asteroseismology ; Stars, B-type ; Parallaxes, trigonometric ;
Stars, distances ; Effective temperatures ; Abundances ;
Photometry ; Optical ; Infrared ; Models, atmosphere
Keywords: asteroseismology - methods: data analysis -
stars: fundamental parameters -
Hertzsprung-Russell and colour-magnitude diagrams - stars: massive
Abstract:
We provide three statistical model prescriptions for the bolometric
corrections appropriate for B-type stars as a function of (i) Teff,
(ii) Teff and logg, and (iii) Teff, logg and [M/H]. These
statistical models have been calculated for 27 different filters,
including those of the Gaia space mission, and were derived based on
two different grids of bolometric corrections assuming LTE and
LTE+NLTE, respectively. Previous such work has mainly been limited to
a single photometric passband without taking into account non-local
thermodynamic equilibrium (NLTE) effects on the bolometric
corrections. Using these statistical models, we calculate the
luminosities of 34 slowly pulsating B-type (SPB) stars with available
spectroscopic parameters, to place them in the Hertzsprung-Russell
diagram and to compare their position to the theoretical SPB
instability strip. We find that excluding NLTE effects has no
significant effect on the derived luminosities for the temperature
range 11500-21000K. We conclude that spectroscopic parameters are
needed in order to achieve meaningful luminosities of B-type stars.
The three prescriptions for the bolometric corrections are valid for
any galactic B-type star with effective temperatures and surface
gravities in the ranges 10000-30000K and 2.5-4.5dex, respectively,
covering regimes below the Eddington limit.
Description:
In order to investigate the impact of taking NLTE effects into account
on the derived bolometric corrections, we consider two grids of
spectral energy distributions (SEDs): the ATLAS9 Castelli and Kurucz
2004 (Castelli & Kurucz 2003IAUS..210P.A20C; LTE) and TLUSTY BSTAR2006
(Lanz & Hubeny 2007ApJS..169...83L 2007ApJS..169...83L; NLTE) models.
Through the use of multivariate linear regression, three statistical
model representations of the LTE and LTE+NLTE grids were computed for
each of the considered 27 filters as a function of Teff, logg and
[M/H]. These prescriptions are valid for Teff∈[10000,30000]K and
for a wider range in logg and [M/H] than a similar prescription for
BCV by, for example, Flower (1996ApJ...469..355F 1996ApJ...469..355F, Cat.
J/ApJ/469/355), which has been derived for main-sequence stars. A high
microturbulence (Vt=10km/s) combined with low surface gravity
(logg=<3.0) may result in an underestimation of the bolometric
corrections derived from the three prescriptions presented in this
work.
Using these derived prescriptions for the bolometric corrections for
each passband and the Bayestar19 reddening map by Green et al.
(2019ApJ...887...93G 2019ApJ...887...93G), we calculate an average, extinction-corrected,
apparent bolometric magnitude for each of the 34 SPB stars. These are
converted to luminosities using the distances from Bailer-Jones et al.
(2018AJ....156...58B 2018AJ....156...58B, Cat. I/347) and Anders et al.
(2019A&A...628A..94A 2019A&A...628A..94A, Cat. I/349) based on the Gaia DR2 parallaxes.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table3.dat 81 34 Distances determined by Bailer-Jones et al.
(2018AJ....156...58B 2018AJ....156...58B, Cat. I/347) and
Anders et al. (2019A&A...628A..94A 2019A&A...628A..94A, Cat. I/349)
using the Gaia parallaxes
tablea1.dat 54 27 Photometric passband filter information for
available photometric data
tablee1.dat 468 34 Apparant magnitudes available for the SPB stars
in each filter
tablef1.dat 113 34 Stellar parameters available from spectroscopy,
the Kepler Input Catalog (KIC), and Gaia
parameters provided by Anders et al.
(2019A&A...628A..94A 2019A&A...628A..94A, Cat. I/349)
tableg1.dat 68 34 Luminosities derived using the statistical
models 1, 2, and 3 (L1, L2, L3) based on
the LTE+NLTE and LTE bolometric correction grids
tableg2.dat 48 34 Luminosities derived using 4 different methods
tableg3.dat 68 34 Luminosities derived based on the statistical
model 1, 2, and 3 (L1, L2, L3)
representations of the bolometric corrections,
using the stellar parameters from Gaia and KIC
--------------------------------------------------------------------------------
See also:
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
I/347 : Distances to 1.33 billion stars in Gaia DR2
(Bailer-Jones+, 2018)
I/349 : StarHorse, Gaia DR2 photo-astrometric distances
(Anders+, 2019)
J/A+A/619/A180 : Gaia DR2 photometric sensitivity curves
(Maiz Apellaniz+, 2018)
II/294 : The SDSS Photometric Catalog, Release 7
(Adelman-McCarthy+, 2009)
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
I/259 : The Tycho-2 Catalogue (Hog+ 2000)
II/311 : WISE All-Sky Data Release (Cutri+ 2012)
V/133 : Kepler Input Catalog (Kepler Mission Team, 2009)
Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 A8 --- KIC KIC object identifier
10- 14 F5.3 mas plx Gaia DR2 parallax
16- 20 F5.3 mas e_plx Error on parallax
22- 23 I2 --- fplx Parallax error in percentage
25 A1 --- f_fplx [*] Flag on fplx (1)
27- 30 F4.2 --- RUWE Renormalized unit-weight error
32 A1 --- f_RUWE [*] Flag on RUWE (2)
34- 39 F6.3 kpc DistBJ Distance determined by Bailer-Jones et al.
(2018AJ....156...58B 2018AJ....156...58B, Cat. I/347)
41- 45 F5.3 kpc e_DistBJ Error on DistBJ
47- 51 F5.3 mag E(B-V)BJ Reddening at the distance DistBJ according to
the Green et al. (2019ApJ...887...93G 2019ApJ...887...93G) maps
53- 57 F5.3 mag e_E(B-V)BJ Error on E(B-V)BJ
59- 63 F5.3 kpc DistA Distance determined by Anders et al.
(2019A&A...628A..94A 2019A&A...628A..94A, Cat. I/349)
65- 69 F5.3 kpc e_DistA Error on DistA
71- 75 F5.3 mag E(B-V)A Reddening at the distance DistA according to
the Green et al. (2019ApJ...887...93G 2019ApJ...887...93G) maps
77- 81 F5.3 mag e_E(B-V)A Error on E(B-V)A
--------------------------------------------------------------------------------
Note (1): Flag as follows:
* = Parallax error >20 per cent
Note (2): Flag as follows:
* = RUWE larger than 1.4
--------------------------------------------------------------------------------
Byte-by-byte Description of file: tablea1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 13 A13 --- Filter Filter name
15- 20 I6 0.1nm lambda Effective wavelength used to obtain RSFitz
22- 27 A6 --- Dettype Detector type (photon or energy)
29- 35 A7 --- MagSys Magnitude system (VEGA or AB)
37- 41 F5.2 mag zp Zero-point magnitude correction for the
assumed magnitude system
43- 46 F4.2 mag Magsun Absolute magnitude of the Sun in the given
passband and magnitude system
48- 52 F5.3 --- RSFitz Ratio of total to selective extinction for the
Fitzpatrick (2004ASPC..309...33F 2004ASPC..309...33F) reddening
law
54 A1 --- Ref Reference from which the transmission curves
were obtained (1)
--------------------------------------------------------------------------------
Note (1): References as follows:
a = Maiz Apellaniz & Weiler (2018A&A...619A.180M 2018A&A...619A.180M, Cat. J/A+A/619/A180)
b = Mann & von Braun (2015PASP..127..102M 2015PASP..127..102M)
c = Abazajian et al. (2009ApJS..182..543A 2009ApJS..182..543A, Cat. II/294)
d = Cohen et al. (2003AJ....126.1090C 2003AJ....126.1090C)
e = Wright et al. (2010AJ....140.1868W 2010AJ....140.1868W)
--------------------------------------------------------------------------------
Byte-by-byte Description of file: tablee1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 A8 mag KIC KIC object identifier
10- 15 F6.3 mag Gmag Gaia DR2 G magnitude
17- 21 F5.3 mag e_Gmag Error on Gmag
23- 28 F6.3 mag BPmag Gaia DR2 BP magnitude
30- 34 F5.3 mag e_BPmag Error on BPmag
36- 41 F6.3 mag RPmag Gaia DR2 RP magnitude
43- 47 F5.3 mag e_RPmag Error on RPmag
49- 53 F5.3 mag HPmag ? Hipparcos HP magnitude
55- 59 F5.3 mag e_HPmag ? Error on HPmag
61- 65 F5.3 mag UJmag ? Johnson U-band magnitude
67- 71 F5.3 mag e_UJmag ? Error on UJmag
73- 78 F6.3 mag BJ1mag ? Johnson B-band magnitude
80- 84 F5.3 mag e_BJ1mag ? Error on BJ1mag
86- 90 F5.3 mag BJ2mag ? Other Johnson B-band magnitude
92- 96 F5.3 mag e_BJ2mag ? Error on BJ2mag
98- 103 F6.3 mag VJ1mag ? Johnson V-band magnitude
105- 109 F5.3 mag e_VJ1mag ? Error on VJ1mag
111- 116 F6.3 mag VJ2mag ? Other Johnson V-band magnitude
118- 122 F5.3 mag e_VJ2mag ? Error on VJ2mag
124- 129 F6.3 mag I1mag ? Cousins I-band magnitude
131- 135 F5.3 mag e_I1mag ? Error on I1mag
137- 141 F5.3 mag I2mag ? Other Cousins I-band magnitude
143- 147 F5.3 mag e_I2mag ? Error on I2mag
149- 154 F6.3 mag BT1mag ? Tycho BT magnitude
156- 160 F5.3 mag e_BT1mag ? Error on BT1mag
162- 166 F5.3 mag BT2mag ? Other Tycho BT magnitude
168- 172 F5.3 mag e_BT2mag ? Error on BT2mag
174- 179 F6.3 mag VT1mag ? Tycho VT magnitude
181- 185 F5.3 mag e_VT1mag ? Error on VT1mag
187- 191 F5.3 mag VT2mag ? Other Tycho VT magnitude
193- 197 F5.3 mag e_VT2mag ? Error on VT2mag
199- 204 F6.3 mag USmag ? Stroemgren U-band magnitude
206- 210 F5.3 mag e_USmag ? Error on USmag
212- 217 F6.3 mag VSmag ? Stroemgren V-band magnitude
219- 223 F5.3 mag e_VSmag ? Error on VSmag
225- 230 F6.3 mag BSmag ? Stroemgren B-band magnitude
232- 236 F5.3 mag e_BSmag ? Error on BSmag
238- 243 F6.3 mag Y1mag ? Stroemgren Y-band magnitude
245- 249 F5.3 mag e_Y1mag ? Error on Y1mag
251- 255 F5.3 mag Y2mag ? Other Stroemgren Y-band magnitude
257- 261 F5.3 mag e_Y2mag ? Error on Y2mag
263- 268 F6.3 mag umag ? SDSS u-band magnitude
270- 274 F5.3 mag e_umag ? Error on umag
276- 281 F6.3 mag g1mag SDSS g-band magnitude
283- 287 F5.3 mag e_g1mag Error on g1mag
289- 294 F6.3 mag g2mag ? Other SDSS g-band magnitude
296- 300 F5.3 mag e_g2mag ? Error on g2mag
302- 307 F6.3 mag r1mag SDSS r-band magnitude
309- 313 F5.3 mag e_r1mag Error on r1mag
315- 320 F6.3 mag r2mag ? Other SDSS r-band magnitude
322- 326 F5.3 mag e_r2mag ? Error on r2mag
328- 333 F6.3 mag i1mag ? SDSS i-band magnitude
335- 339 F5.3 mag e_i1mag ? Error on i1mag
341- 346 F6.3 mag i2mag ? Other SDSS i-band magnitude
348- 352 F5.3 mag e_i2mag ? Error on i2mag
354- 359 F6.3 mag z1mag ? SDSS z-band magnitude
361- 365 F5.3 mag e_z1mag ? Error on z1mag
367- 372 F6.3 mag z2mag ? Other SDSS z-band magnitude
374- 378 F5.3 mag e_z2mag ? Error on z2mag
380- 385 F6.3 mag Jmag 2MASS J-band magnitude
387- 391 F5.3 mag e_Jmag Error on Jmag
393- 398 F6.3 mag Hmag 2MASS H-band magnitude
400- 404 F5.3 mag e_Hmag Error on Hmag
406- 411 F6.3 mag Ksmag 2MASS Ks-band magnitude
413- 417 F5.3 mag e_Ksmag Error on Ksmag
419- 424 F6.3 mag W1mag ? WISE W1 (3.4um) band magnitude
426- 430 F5.3 mag e_W1mag ? Error on W1mag
432- 437 F6.3 mag W2mag ? WISE W2 (4.6um) band magnitude
439- 443 F5.3 mag e_W2mag ? Error on W2mag
445- 450 F6.3 mag W3mag ? WISE W3 (12um) band magnitude
452- 456 F5.3 mag e_W3mag ? Error on W3mag
458- 462 F5.3 mag W4mag ? WISE W4 (22um) band magnitude
464- 468 F5.3 mag e_W4mag ? Error on W4mag
--------------------------------------------------------------------------------
Byte-by-byte Description of file: tablef1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 A8 --- KIC KIC object identifier
10- 28 I19 --- GaiaDR2 Gaia DR2 source identifier
30- 34 I5 K Teff Effective temperature from spectroscopic
data
36- 39 I4 K e_Teff Error on Teff
41- 44 F4.2 [cm/s2] logg Surface gravity from spectroscopic data
46- 49 F4.2 [cm/s2] e_logg Error on logg
51- 55 F5.2 [-] [M/H] Metallicity [M/H] from spectroscopic data
(1)
57- 60 F4.2 [-] e_[M/H] Error on [M/H] (1)
62 A1 --- f_[M/H] [ab] Flag on [M/H] (2)
64- 68 I5 K TeffKIC ? Effective temperature from KIC data
70- 73 F4.2 [cm/s2] loggKIC ? Surface gravity from KIC data
75- 79 F5.2 [-] [M/H]KIC ? Metallicity [M/H] from KIC data
81- 85 I5 K TeffG Effective temperature from Gaia data
87- 90 I4 K e_TeffG Error on TeffG
92- 95 F4.2 [cm/s2] loggG Surface gravity from Gaia data
97- 100 F4.2 [cm/s2] e_loggG Error on loggG
102- 106 F5.2 [-] [M/H]G Metallicity [M/H] from Gaia data
108- 111 F4.2 [-] e_[M/H]G Error on [M/H]G
113 A1 --- Ref Reference for spectroscopic parameters (3)
--------------------------------------------------------------------------------
Note (1): For Zhang et al. (2018ApJ...854..168Z 2018ApJ...854..168Z) and Frasca et al.
(2016A&A...594A..39F 2016A&A...594A..39F, Cat. J/A+A/594/A39), [M/H] is actually [Fe/H].
Metallicities were fixed to solar values by Hanes et al.
(2019AJ....157..129H 2019AJ....157..129H) to derive Teff and logg.
Note (2): Flag as follows:
a = [M/H]=logZ/Z☉
b = Papics et al. (2014A&A...570A...8P 2014A&A...570A...8P) only provides Z. This has been
converted to [M/H] using logZ/Z☉ and assuming Z☉=0.0169
Note (3): Reference as follows:
a = Hanes et al. (2019AJ....157..129H 2019AJ....157..129H)
b = Lehmann et al. (2011A&A...526A.124L 2011A&A...526A.124L)
c = Papics et al. (2017A&A...598A..74P 2017A&A...598A..74P)
d = Zhang et al. (2018ApJ...854..168Z 2018ApJ...854..168Z)
e = Papics et al. (2013A&A...553A.127P 2013A&A...553A.127P, Cat. J/A+A/553/A127)
f = Frasca et al. (2016A&A...594A..39F 2016A&A...594A..39F, Cat. J/A+A/594/A39)
g = Papics et al. (2015ApJ...803L..25P 2015ApJ...803L..25P)
h = Papics et al. (2014A&A...570A...8P 2014A&A...570A...8P)
--------------------------------------------------------------------------------
Byte-by-byte Description of file: tableg1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 A8 --- KIC KIC object identifier
10- 13 F4.2 [Lsun] logL3LN Logarithm of the L3 luminosity based on the
LTE+NTE correction grids (1)
15- 18 F4.2 [Lsun] e_logL3LN Error on logL3LN
20- 23 F4.2 [Lsun] logL2LN Logarithm of the L2 luminosity based on the
LTE+NTE correction grids (1)
25- 28 F4.2 [Lsun] e_logL2LN Error on logL2LN
30- 33 F4.2 [Lsun] logL1LN Logarithm of the L1 luminosity based on the
LTE+NTE correction grids (1)
35- 38 F4.2 [Lsun] e_logL1LN Error on logL1LN
40- 43 F4.2 [Lsun] logL3L Logarithm of the L3 luminosity based on the
LTE correction grids (1)
45- 48 F4.2 [Lsun] e_logL3L Error on logL3L
50- 53 F4.2 [Lsun] logL2L Logarithm of the L2 luminosity based on the
LTE correction grids (1)
55- 58 F4.2 [Lsun] e_logL2L Error on logL2L
60- 63 F4.2 [Lsun] logL1L Logarithm of the L1 luminosity based on the
LTE correction grids (1)
65- 68 F4.2 [Lsun] e_logL1L Error on logL1L
--------------------------------------------------------------------------------
Note (1): Luminosities L1, L2 and L3 are derived using the statistical
models 1, 2, and 3 respectively
--------------------------------------------------------------------------------
Byte-by-byte Description of file: tableg2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 A8 --- KIC KIC object identifier
10- 13 F4.2 [Lsun] logLint Logarithm of the luminosity derived using a
a linear interpolation for the bolometric
corrections of the LTE+NLTE grid
15- 18 F4.2 [Lsun] e_logLint Error on logLint
20- 23 F4.2 [Lsun] logLBJ Logarithm of the luminosity derived using
the distances from Bailer-Jones et al.
(2019A&A...628A..94A 2019A&A...628A..94A, Cat. I/349)
25- 28 F4.2 [Lsun] e_logLBJ Error on logLBJ
30- 33 F4.2 [Lsun] logLFlow ? Logarithm of the luminosity derived using
the prescription of Flower
(2019A&A...628A..94A 2019A&A...628A..94A, Cat. I/349) for the
bolometric corrections in the V-band
35- 38 F4.2 [Lsun] e_logLFlow ? Error on logLFlow
40- 43 F4.2 [Lsun] logLPed ? Logarithm of the luminosity derived
similarly to logLFlow but using our
statistical model 3 for the bolometric
corrections
45- 48 F4.2 [Lsun] e_logLPed ? Error on logLPed
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Byte-by-byte Description of file: tableg3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 A8 --- KIC KIC object identifier
10- 13 F4.2 [Lsun] logL3G Logarithm of the L3 luminosity using Gaia
stellar parameters
15- 18 F4.2 [Lsun] e_logL3G Error on logL3G
20- 23 F4.2 [Lsun] logL2G Logarithm of the L2 luminosity using Gaia
stellar parameters
25- 28 F4.2 [Lsun] e_logL2G Error on logL2G
30- 33 F4.2 [Lsun] logL1G Logarithm of the L1 luminosity using Gaia
stellar parameters
35- 38 F4.2 [Lsun] e_logL1G Error on logL1G
40- 43 F4.2 [Lsun] logL3KIC ? Logarithm of the L3 luminosity using KIC
stellar parameters
45- 48 F4.2 [Lsun] e_logL3KIC ? Error on logL3KIC
50- 53 F4.2 [Lsun] logL2KIC ? Logarithm of the L2 luminosity using KIC
stellar parameters
55- 58 F4.2 [Lsun] e_logL2KIC ? Error on logL2KIC
60- 63 F4.2 [Lsun] logL1KIC ? Logarithm of the L1 luminosity using KIC
stellar parameters
65- 68 F4.2 [Lsun] e_logL1KIC ? Error on logL1KIC
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History:
From electronic version of the journal
(End) Ana Fiallos [CDS] 15-Jun-2023