J/AJ/119/1448 Improved properties for cool stars (Houdashelt+, 2000)
Improved color-temperature relations and bolometric corrections for cool stars
Houdashelt M.L., Bell R.A., Sweigart A.V.
<Astron. J. 119, 1448 (2000)>
=2000AJ....119.1448H 2000AJ....119.1448H
ADC_Keywords: Colors ; Models, atmosphere ; Photometry, Cousins ;
Photometry, UBVRI ; Stars, F-type ; Stars, G-type ; Stars, K-type
Keywords: infrared radiation - stars: atmospheres - stars: evolution - stars:
fundamental parameters - stars: late-type
Abstract:
We present new grids of colors and bolometric corrections for F-K
stars having 4000 K ≤ Teff ≤ 6500 K, 0.0 ≤ log(g) ≤ 4.5,
and -3.0 ≤ [Fe/H] ≤ 0.0. Colors are tabulated for Johnson U-V
and B-V, Cousins V-R and V-I, Johnson-Glass V-K, J-K, and H-K, and
CIT/CTIO V-K, J-K, H-K, and CO. We have developed these
color-temperature relations by convolving synthetic spectra with the
best-determined, photometric filter transmission profiles. The
synthetic spectra have been computed with the SSG spectral synthesis
code (Bell & Gustafsson 1978; Gustafsson & Bell 1979) using MARCS
stellar atmosphere models (Gustafsson et al. 1975; Bell et al. 1976)
as input. Both of these codes have been improved substantially,
especially at low temperatures, through the incorporation of new
opacity data. The resulting synthetic colors have been put onto the
observational systems by applying color calibrations derived from
models and photometry of field stars that have effective temperatures
determined by the infrared flux method. These color calibrations have
zero points that change most of the original synthetic colors by less
than 0.02 mag, and the corresponding slopes generally alter the colors
by less than 5%.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 83 101 Field star sample
table5.dat 148 550 Calibrated color-temperature relations
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See also:
J/ApJ/469/355 : Teff, B-V and BC relation (Flower, 1996)
J/AJ/119/1424 : Color-temperature relations of M giants (Houdashelt+, 2000)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- HR HR number of star
6- 11 I6 --- HD HD number of star
13- 25 A13 --- ID Other identification of star
27- 39 A13 --- SpType MK Spectral type of star from SIMBAD
41- 44 I4 K Teff Effective temperature (1)
46- 49 F4.2 [cm/s2] log(g) Log of the surface gravity (1)
51 A1 --- f_log(g) [fhi] Estimated value of log(g) (2)
54- 58 F5.2 [Sun] [Fe/H] Log of the iron to hydrogen abundance
relative to solar (1)
60 A1 --- f_[Fe/H] [e] Indicates solar metallicity has been
assumed
63 I1 --- r_UBV ? The UBV reference code (3)
65 I1 --- r_VRI ? The VRI reference code (3)
69 I1 --- r_VJHK ? The VJHK reference code (3)
71 A1 --- f_VJHK [g] No H band photometry was given
74- 83 A10 --- Notes Further notes on the star (4)
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Note (1): Stellar parameters were taken from
Bell & Gustafsson (1978A&AS...34..229B 1978A&AS...34..229B) or
Saxner & Hammarback (1985A&A...151..372S 1985A&A...151..372S), unless otherwise noted
Note (2): the flag has the following meaning:
f = Isochrones were used to estimate log(g) from the effective temperature,
luminosity class, and metallicity.
h = This log g was taken from Bonnell & Bell (1993MNRAS.264..319B 1993MNRAS.264..319B),
(1993MNRAS.264..334B 1993MNRAS.264..334B)
i = This log(g) was estimated from stars of similar effective temperature
and luminosity class
Note (3): the reference is coded as follows:
1 = Mermilliod 1991, Cat. II/168
2 = Glass (1974MNSSA..33...53G 1974MNSSA..33...53G)
3 = Cousins (1980SAAOC...1..234C 1980SAAOC...1..234C)
4 = Johnson et al. (1966CoLPL...4...99J 1966CoLPL...4...99J)
5 = Johnson et al. (1968ApJ...152..465J 1968ApJ...152..465J)
6 = Lee (1970ApJ...162..217L 1970ApJ...162..217L)
7 = Engels et al. (1981A&AS...45....5E 1981A&AS...45....5E)
Note (4): Keys are as follows:
D = Double/multiple system
SB = spectroscopic binary
V = variable (as indicated by SIMBAD and/or Mermilliod 1991
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 I4 K Teff Effective temperature
8- 11 F4.2 [cm/s2] log(g) Log of the surface gravity
15- 19 F5.2 [Sun] [Fe/H] Log of the iron to hydrogen abundance
relative to solar
22- 26 F5.3 mag (U-B) ? The Johnson-Cousins U-B color
(Bessel 1990PASP..102.1181B 1990PASP..102.1181B)
30- 34 F5.3 mag (U-B)CD ? The U-B color from cool-dwarf color
calibrations (see section 3.2.2)
38- 42 F5.3 mag (B-V) ? The Johnson-Cousins B-V color
(Bessel 1990PASP..102.1181B 1990PASP..102.1181B)
46- 50 F5.3 mag (B-V)CD ? The B-V color from cool-dwarf color
calibrations (see section 3.2.2)
54- 58 F5.3 mag (V-R) ? The Johnson-Cousins V-R color
(Bessel 1990PASP..102.1181B 1990PASP..102.1181B)
62- 66 F5.3 mag (V-R)CD ? The V-R color from cool-dwarf color
calibrations (see section 3.2.2)
70- 74 F5.3 mag (V-I) ? The Johnson-Cousins V-I color
(Bessel 1990PASP..102.1181B 1990PASP..102.1181B)
78- 82 F5.3 mag (V-I)CD ? The V-I color from cool-dwarf color
calibrations (see section 3.2.2)
86- 90 F5.3 mag (V-K) ? The Johnson-Glass V-K color
(Bessel & Brett 1988PASP..100.1134B 1988PASP..100.1134B)
94- 98 F5.3 mag (J-K) ? The Johnson-Glass J-K color
(Bessel & Brett 1988PASP..100.1134B 1988PASP..100.1134B)
102-106 F5.3 mag (H-K) ? The Johnson-Glass H-K color
(Bessel & Brett 1988PASP..100.1134B 1988PASP..100.1134B)
110-114 F5.3 mag (V-K)c ? The CIT-CTIO V-K color
118-122 F5.3 mag (J-K)c ? The CIT-CTIO V-K color
126-130 F5.3 mag (H-K)c ? The CIT-CTIO V-K color
133-138 F6.3 mag CO ? The CIT-CTIO CO filter magnitude without
color correction
(Frogel+ 1978ApJ...220...75F 1978ApJ...220...75F)
142-146 F5.3 mag BC(K) ? K band bolometric correction (1)
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Note (1): BC(V) = BC - (V-K)
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History:
From AJ electronic edition
References:
Bell, R. A., Eriksson, K., Gustafsson, B., & Nordlund, A. 1976, A&AS,
23, 37 (1976A&AS...23...37B 1976A&AS...23...37B)
Bell, R. A., & Gustafsson, B. 1978, A&AS, 34, 229 (1978A&AS...34..229B 1978A&AS...34..229B)
Gustafsson, B. Bell, R. A., Eriksson, K. Nordlund, A. 1975, A&A, 42 407
(1975A&A....42..407G 1975A&A....42..407G)
Gustafsson, B. & Bell, R. A. 1979, A&A, 74, 313 (1979A&A....74..313G 1979A&A....74..313G)
Mermilliod, J.-C. 1991, Homogeneous Means in the UBV System, in
Astronomical Data Center CD-ROM Selected Astronomica, Vol. 1, comp.
L. E. Brotzman & S. E. Gessner (3d ed.; Greenbelt, MD: GSFC)
(End) Greg Schwarz [AAS] 17-Apr-2000