J/ApJS/143/513 Spectral classification of close binaries (Ginestet+, 2002)
Spectral classification of the hot components of a large sample of stars with
composite spectra, and implication for the absolute magnitudes of the cool
supergiant components.
Ginestet N., Carquillat J.M.
<Astrophys. J. Suppl. Ser. 143, 513 (2002)>
=2002ApJS..143..513G 2002ApJS..143..513G
ADC_Keywords: Stars, double and multiple ; Binaries, spectroscopic ;
Photometry, UBV ; Parallaxes, spectroscopic
Keywords: binaries: close - stars: fundamental parameters -
techniques: spectroscopic
Abstract:
A sample of 135 stars with composite spectra has been observed in the
near-UV spectral region with the Aurelie spectrograph at the
Observatoire de Haute-Provence. Using the spectral classifications of
the cool components previously determined with near infrared spectra,
we obtained reliable spectral types of the hot components of the
sample systems. The hot components were isolated by the subtraction
method using MK standards as surrogates of the cool components. We
also derived the visual magnitude differences between the components
using Willstrop's normalized stellar flux ratios. We propose a
photometric model for each of these systems on the basis of our
spectroscopic data and the Hipparcos data.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 113 139 Spectral classifications and magnitude
differences of stars with composite spectra
notes.dat 80 189 Individual notes
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See also:
I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Name Star name (BD or HD)
11 A1 --- n_Name [*] *: note detailed in notes.dat file
12 A1 --- f_Name [S] S: Star used as MK standard
14- 24 A11 --- OName Other name (HR or usual)
26- 38 A13 --- SpTypeCool Cool component IR classification (1)
40- 53 A14 --- SpTypeHot Hot component near-UV classification (1)
55- 60 I6 --- HIP ? HIP number
62- 66 F5.2 mag Vmag ? V magnitude
68- 72 F5.3 mag B-V ? B-V colour index
74- 78 F5.2 mas pi ? Parallax
80- 83 F4.2 mas e_pi ? rms uncertainty on pi
85- 88 F4.2 --- e_pi/pi ? Relative error on the parallax
90- 93 I4 pc Dist ? Distance
95- 99 F5.2 mag VMAG ? Absolute V magnitude (not dereddened)
101-105 F5.2 mag V2-V1M ? Model V2-V1 value (2)
107-111 F5.2 mag V2-V1E ? Empirical V2-V1 value (2) (3)
112 A1 --- u_V2-V1E Uncertainty flag on V2-V1E
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Note (1): A classification between brackets (spectral type plus
luminosity class) means that it is given by another author or deduced
from the photometric model (see Sect. 4 of the paper) because the
subtraction was not possible.
A luminosity class between brackets is added to the spectral type only
if the given photometric model (Sect. 4 of the paper) assigns that
class. In all other cases, the luminosity class should be V. Let us
note that the subtracted spectrum does not permit a reliable access to
the luminosity class of the hot component.
Note (2): The indices "1" and "2" refer to the cool and hot components,
respectively.
Note (3): Empirical V2-V1 value obtained from the subtraction of spectra
with Willstrop's (1965MmRAS..69...83W 1965MmRAS..69...83W) stellar flux method.
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Byte-by-byte Description of file: notes.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Name Star name
11- 80 A70 --- Note Text of the note
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History:
* 13-Jan-2003: From electronic version of the journal
* 12-Jun-2003: Some other names and HIP numbers corrected
(End) James Marcout, Patricia Bauer [CDS] 13-Jan-2003