J/A+AS/117/227 Dwarf effective temperatures (Alonso+ 1996)
Determination of effective temperatures for an extended sample of dwarfs and
subdwarfs (F0-K5).
Alonso A., Arribas S., Martinez-Roger C.
<Astron. Astrophys. Suppl. Ser. 117, 227 (1996)>
=1996A&AS..117..227A 1996A&AS..117..227A
ADC_Keywords: Stars, subdwarf ; Effective temperatures ; Photometry, infrared
Keywords: stars: fundamental parameters - stars: Population II -
stars: subdwarfs - stars: general
Description:
We have applied the InfraRed Flux Method (IRFM) to a sample of 475
dwarfs and subdwarfs in order to derive their effective temperatures
with a mean accuracy of about 1.5%. We have used the new homogeneous
grid of theoretical model atmosphere flux distributions developed by
Kurucz (1991, 1993) for the application of the IRFM. The atmospheric
parameters of the stars cover, roughly, the ranges:
3500K≤Teff≤8000K; -3.5≤[Fe/H]≤+0.5; 3.5≤log(g)≤5.
The monochromatic infrared fluxes at the continuum, and the bolometric
fluxes are derived using recent results, which satisfy the accuracy
requirements of the work.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 134 462 Effective temperatures
table4a.tex 312 457 LaTeX version of table4, part 1
table4b.tex 167 285 LaTeX version of table4, part 2
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See also:
J/A+AS/107/365 : Dwarfs and subdwarfs IR photometry (Alonso+, 1994)
J/A+AS/131/209 : Giants JHK(L') photometry (Alonso+ 1998)
Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 12 A12 --- ID Identification (1)
14 A1 --- n_ID Individual note on ID (2)
17- 20 F4.2 [cm/s2] logg Surface gravity
22- 26 F5.2 [Sun] [Fe/H] Metallicity
28- 36 E9.3 10-5W/m2 FBol Bolometric flux (10-2erg/cm2/s)
38- 41 F4.2 mag E(B-V) Interestellar redenning
43- 51 E9.3 mW/m2 FJ ? Monochromatic flux in the band J
53- 57 F5.3 --- qJ ? q-factor in the band J (7)
59 A1 --- l_TJ limit flag on TJ
60- 63 I4 K TJ ? Effective temperature derived in the band J
64 A1 --- n_TJ [])] Note on TJ (3)
66- 68 I3 K e_TJ ? rms uncertainty on TJ (4)
70- 78 E9.3 dW/m2/nm FH ? Monochromatic flux in the band H (6)
80- 84 F5.3 --- qH ? q-factor in the band H (7)
86 A1 --- l_TH Limit flag on TH
87- 90 I4 K TH ? Effective temperature derived in the band H
91 A1 --- n_TH []] Note on TH (3)
93- 95 I3 K e_TH ? rms uncertainty on TH (4)
97-105 E9.3 dW/m2/nm FK ? Monochromatic flux in the band K (6)
107-111 F5.3 --- qK ? q-factor in the band K (7)
114-117 I4 K TK ? Effective temperature derived in the band K
119-121 I3 K e_TK ? rms uncertainty on TK (4)
125-128 I4 K Tmean ? Weighted effective temperature derived from
TJ, TH and TK
129 A1 --- n_Tmean [)] Note on Tmean (3)
131-133 I3 K e_Tmean ? rms uncertainty on Tmean (5)
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Note (1): Giclas number has been preferred when available. HD, BD, HR and GJ
numbers were used otherwise. The stars are ordered in right ascension
Note (2): Notes are numbered as follows:
1 = SB501: Wrong FJ, (J=11.22).
2 = G036-050: The error in FJ is greater than 10%, hence no TJ
is provided.
3 = G178-030: Very faint star, J=11.63, H=11.31 and K=11.127.
4 = G167-011: The error in FJ is greater than 20%. The faintest star
of the sample (J=12.99).
5 = HR6228: Wrong FJ.
6 = G017-037: Very faint star, J=11.706, H=11.300 and K=11.297.
7 = G021-006: Wrong FJ, (J=10.38).
8 = G126-063: Faint star, J=10.69, H=10.64 and K=10.59.
9 = G217-008: Wrong FJ.
Note (3):
-- A bracket indicates that the temperature has not been considered
in the mean as explained in Sect. 5.
-- A parentheses indicates temperatures under 4000 K. In this case
there isn't estimation of the total error because of the
uncertainties of the model fluxes in this range.
Note (4): Error computed considering errors in FBol, FJ, logg and [Fe/H].
Note (5): Mean error computed considering linear transmission of errors
from e_TJ, e_TH and e_TK.
Note (6): in 102 erg.cm-2.s-1.nm-1
Note (7): the q factor is the ratio between the monochromatic and
integrated fluxes (it corrects the effects of the different
curvatures in the flux density distribution). It is a function
of the stellar parameters (T, g, metallicity) and wavelength.
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Courtesy: Angel Alonso <aas(at)ll.iac(es)>
History:
* 12-Jun-1996: Original version
* 17-May-2010: Units of FBol and FJ corrected,
from Erratum A&AS, 121, 211 (1997)
(End) Patricia Bauer [CDS] 18-Jan-1996