J/A+A/333/231 O-M stars model atmospheres (Bessell+ 1998)
Model atmospheres broad-band colors, bolometric corrections and temperature
calibrations for O - M stars
Bessell M.S., Castelli F., Plez B.
<Astron. Astrophys. 333, 231 (1998)>
=1998A&A...333..231B 1998A&A...333..231B (SIMBAD/NED BibCode)
ADC_Keywords: Models, atmosphere ; Photometry, UBVRIJKLMNH
Keywords: stars: atmospheres; fundamental parameters; general
Abstract:
Broad band colors and bolometric corrections in the
Johnson-Cousins-Glass system (Bessell, 1990PASP..102.1181B 1990PASP..102.1181B; Bessell &
Brett, 1988PASP..100.1134B 1988PASP..100.1134B) have been computed from synthetic spectra
from new model atmospheres of Kurucz (1995a, priv. comm.), Castelli
(1997, priv. comm.), Plez, Brett & Nordlund (1992A&A...256..551P 1992A&A...256..551P),
Plez (1995-97, priv. comm.), and Brett (1995A&A...295..736B 1995A&A...295..736B,
1995A&AS..109..263B 1995A&AS..109..263B). These atmospheres are representative of larger
grids that are currently being completed. We discuss differences
between the different grids and compare theoretical color-temperature
relations and the fundamental color temperature relations derived
from: (a) the infrared-flux method (IRFM) for A-K stars (Blackwell &
Lynas-Gray 1994A&A...282..899B 1994A&A...282..899B; Alonso et al. 1996A&AS..117..227A 1996A&AS..117..227A) and
M dwarfs (Tsuji et al. 1996A&A...305L...1T 1996A&A...305L...1T); (b) lunar occultations
(Ridgway et al. 1980ApJ...235..126R 1980ApJ...235..126R) and (c) Michelson interferometry
(Di Benedetto & Rabbia 1987A&A...188..114D 1987A&A...188..114D; Dyck et al.
1996AJ....111.1705D 1996AJ....111.1705D; Perrin et al. 1998A&A...331..619P 1998A&A...331..619P) for K-M
giants, and (d) eclipsing binaries for M dwarfs. We also compare
color-color relations and color-bolometric correction relations and
find good agreement except for a few colors. The more realistic fluxes
and spectra of the new model grids should enable accurate population
synthesis models to be derived and permit the ready calibration of
non-standard photometric passbands. As well, the theoretical
bolometric corrections and temperature-color relations will permit
reliable transformation from observed color magnitude diagrams to
theoretical HR diagrams.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 82 224 Color indices and bolometric corrections from ATLAS9
overshoot models (Kurucz, 1995a, priv. comm.)
table2.dat 81 224 Color indices and bolometric corrections from ATLAS9
no-overshoot models (Castelli, 1997, priv. comm.)
table3.dat 82 252 Color indices and bolometric corrections from ATLAS9
models for Teff≥9000K (Kurucz, 1993)
table4.dat 71 93 Color indices and bolometric corrections from NMARCS
giant branch models of Plez, Brett and Nordlund
(1992A&A...256..551P 1992A&A...256..551P)
table5.dat 74 186 Color indices and bolometric corrections from NMARCS
giant branch models of Plez (1995, priv. comm.).
table6.dat 74 76 Color indices and bolometric corrections from NMARCS
M dwarf models of Plez (1997, priv. comm.)* and
Brett (1995A&A...295..736B 1995A&A...295..736B and 1995A&AS..109..263B 1995A&AS..109..263B)
--------------------------------------------------------------------------------
See also:
VI/39 : Model Atmospheres (Kurucz, 1979)
Byte-by-byte Description of file: table1.dat table2.dat table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 I5 K Teff Effective temperature
7- 10 F4.2 [cm/s2] logg Surface gravity
12- 16 F5.2 mag BC(K) Bolometric correction in Kmag
18- 22 F5.2 mag BC(V) Bolometric correction in Vmag
24- 29 F6.3 mag U-B U-B colour index
31- 36 F6.3 mag B-V B-V colour index
38- 43 F6.3 mag V-R V-R colour index
45- 50 F6.3 mag V-I V-I colour index
52- 57 F6.3 mag V-K V-K colour index
59- 64 F6.3 mag J-H J-H colour index
66- 71 F6.3 mag J-K J-K colour index
73- 78 F6.3 mag K-L K-L colour index
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table4.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 I4 K Teff Effective temperature
6- 10 F5.2 [cm/s2] logg Surface gravity
12- 15 F4.2 solMass Mass Mass
17- 20 F4.2 mag BC(K) Bolometric correction in Kmag
22- 26 F5.2 mag BC(V) Bolometric correction in Vmag
28- 32 F5.3 mag B-V B-V colour index
34- 38 F5.3 mag V-R V-R colour index
40- 44 F5.3 mag V-I V-I colour index
46- 50 F5.3 mag V-K V-K colour index
52- 56 F5.3 mag J-H J-H colour index
58- 62 F5.3 mag J-K J-K colour index
64- 68 F5.3 mag K-L K-L colour index
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table5.dat table6.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 I4 K Teff Effective temperature
5 A1 --- Note [*] *: Plez 1997 (priv. comm.) data in table6.dat
6- 10 F5.2 [cm/s2] logg Surface gravity
12- 16 F5.2 Sun [Fe/H] Metallicity
18- 21 F4.2 mag BC(K) Bolometric correction in Kmag
23- 27 F5.2 mag BC(V) Bolometric correction in Vmag
29- 33 F5.3 mag B-V ? B-V colour index
35- 39 F5.3 mag V-R V-R colour index
41- 45 F5.3 mag V-I V-I colour index
47- 52 F6.3 mag V-K V-K colour index
54- 58 F5.3 mag J-H J-H colour index
60- 64 F5.3 mag J-K J-K colour index
66- 70 F5.3 mag K-L K-L colour index
--------------------------------------------------------------------------------
Acknowledgements: Fiorella Castelli
References:
Kurucz, R.L. 1993, "ATLAS9 Stellar Atmosphere Programs and 2 km/s grid",
CD-ROM No 13
(End) Patricia Bauer [CDS] 05-Mar-1998