J/A+A/458/293 Temperature calibration for A & mid F-type stars (Paunzen+, 2006)
An empirical temperature calibration for the Δa photometric system.
II. The A-type and mid F-type stars.
Paunzen E., Schnell A., Maitzen H.M.
<Astron. Astrophys. 458, 293 (2006)>
=2006A&A...458..293P 2006A&A...458..293P
ADC_Keywords: Stars, early-type ; Effective temperatures ; Magnitudes
Keywords: stars: early-type - techniques: photometric
Abstract:
With the Δa photometric system, it is possible to study very
distant galactic and even extragalactic clusters with a high level of
accuracy. The new calibration presented is a powerful extension.
Because no a-priori reddening-free photometric parameters are
available for the investigated spectral range, we have applied the
dereddening calibrations of the Stromgren uvbyβ system and
compared them with extinction models for the Milky Way. We derived an
empirical temperature calibration for the Δa photometric system
for A-type to mid F-type with a mean of the error for the whole sample
of ΔT(eff) is 134K which is lower than the value in Paper I
(Paunzen et al., 2005, Cat. J/A+A/444/941) for hotter stars. No
statistically significant effect of the rotational velocity on the
precision of the calibration was found.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 95 283 *List of 283 normal type stars used for the
calibration
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Note on table1.dat: see Geneva GCPD/75 for a short description of the
Maitzen photometric system (1976A&A....51..223M 1976A&A....51..223M)
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See also:
J/A+AS/117/227 : Dwarf effective temperatures (Alonso+ 1996)
J/A+A/391/1039 : Metal-poor A-type stars effective temperature (Kinman+, 2002)
J/A+A/411/559 : Effective temperature for 181 F-K dwarfs (Kovtyukh+, 2003)
J/ApJ/626/446 : Effective temperature scale of FGK stars (Ramirez+, 2005)
J/A+A/444/941 : Effective temperature of B stars (Paunzen+, 2005)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- HD HD number (Cat. III/135)
8- 12 I5 --- HR HR number (Cat. V/50)
14- 18 F5.3 mag AV Adopted extinction
20- 24 F5.3 mag Vmag V magnitude
26- 30 I5 K Teff(uvby) Calibrated effective temperature (uvby)
32- 36 I5 K Teff(Geneva) Calibrated effective temperature (Geneva)
38- 42 I5 K Teff(UBV) Calibrated effective temperature (UBV)
44- 48 I5 K Teff Adopted effective temperature
50- 53 I4 K e_Teff Error of the adopted Teff
55- 60 F6.3 mag (g1-y)0 (g1-y)0 colour index
62- 67 F6.3 mag (b-y)0 Stroemgren (b-y)0 colour index
69- 74 F6.3 mag (B2-V1)0 Geneva (B2-V1)0 colour index
76- 81 F6.3 mag (B-V)0 Johnson (B-V)0 colour index
83- 85 I3 km/s vsini ?=-99 Rotational velocity, vsini (1)
87- 95 A9 --- SpType MK spectral type
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Note (1): Magic number -99 means no available data
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Acknowledgements: Ernst Paunzen, ernst.paunzen(at)univie.ac.at
(End) Ernst Paunzen [IfA, Vienna], Patricia Vannier [CDS] 22-Aug-2006