J/A+AS/123/135 Spectral classifications of 180 IR stars (Ginestet+ 1997)
Spectral classifications in the near infrared of stars with composite spectra.
II. Study of a sample of 180 stars.
Ginestet N., Carquillat J.M., Jaschek C., Jaschek M.
<Astron. Astrophys. Suppl. Ser. 123, 135 (1997)>
=1997A&AS..123..135G 1997A&AS..123..135G (SIMBAD/NED BibCode)
ADC_Keywords: Spectra, infrared ; MK spectral classification
Keywords: stars: classification - infrared: stars - binaries: spectroscopic
Abstract:
A sample of 180 supposedly composite-spectrum stars has been studied
on the basis of spectra obtained in the near infrared (8370-8780Å)
at a dispersion of 33Å/mm. The objective was to study the cooler
components of the systems. Of our sample, 120 are true composite
spectra, 35 are hot spectra of types B, F and 25 are Am stars. We find
a strong concentration of the cooler components of the composite
spectra around G8III. In view of the difficulty of classifying
composite spectra, because of the superposition of an early type dwarf
and a late type giant or supergiant spectrum, we have made several
tests to control the classification based upon the infrared region.
Since all tests gave positive results, we conclude that our
classifications can be considered as being both reliable and
homogeneous.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 242 120 Classifications of the cool components, SP(IR),
of stars with composite spectra
table2.dat 55 60 Stars of the sample which exhibit a hot spectrum
refs.dat 68 64 References
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- HD/BD HD of BD number of the star
10- 11 I2 h RAh Right ascension (J2000)
13- 14 I2 min RAm Right ascension (J2000)
16- 19 F4.1 s RAs Right ascension (J2000)
21 A1 --- DE- Declination sign
22- 23 I2 deg DEd Declination (J2000)
25- 26 I2 arcmin DEm Declination (J2000)
28- 29 I2 arcsec DEs Declination (J2000)
31- 35 F5.2 mag Vmag V magnitude
36 A1 --- u_Vmag Uncertainty flag on Vmag
38- 41 F4.2 mag B-V ? B-V color index
44- 54 A11 --- SpIR This work spectral type (1)
55 A1 --- n_SpIR [*] Note on the object (2)
57- 72 A16 --- Sp1 Spectral type
74- 91 A18 --- r_Sp1 References for spectral type
(see refs.dat file)
93-106 A14 --- Sp2 Spectral type
107 A1 --- n_Sp2 [*] Note on the object (2)
108-125 A18 --- r_Sp2 References for spectral type
(see refs.dat file)
127-142 A16 --- Sp3 Spectral type
144-160 A17 --- r_Sp3 References for spectral type
(see refs.dat file)
162-173 A12 --- Sp4 Spectral type
175-190 A16 --- r_Sp4 References for spectral type
(see refs.dat file)
192-197 A6 --- Sp5 Spectral type
199-213 A15 --- r_Sp5 References for spectral type
(see refs.dat file)
215-225 A11 --- Sp6 Spectral type
227-242 A16 --- r_Sp6 References for spectral type
(see refs.dat file)
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Note (1): A - or + sign following the Sp(IR) luminosity class indicates that the
object is probably slightly more or less luminous.
Note (2): Individual notes:
HD 18715: classification based on the cool component, since both
components are well separated (8")
HD 26630: standard MK G0 Ib
HD 51250: standard of radial velocity
HD 74395: standard MK G1 Ib
HD 84367: the secondary is probably an Am star
HD 197177: standard MK G8 IIb
HD 199378: the authors suspect the object to be composite (G5III+A)
HD 209278: visual binary, separated 3.7", but the classification is
based on the combined light
HD 212391: the classification is based on the spectrum of the cool
star since the separation of 4.3" permits to observe
individually each component.
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- HD/BD HD or BD name
8- 12 F5.2 mag Vmag V magnitude
13 A1 --- u_Vmag Uncertainty flag on Vmag
14- 18 F5.2 mag B-V ? B-V color index
21- 36 A16 --- Sp Spectral type
37 A1 --- n_Sp [*] * when individual note (1)
39- 53 A15 --- SpIR This work spectral type
55 A1 --- n_SpIR [*] * when individual note (1)
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Note (1):
HD 14262: also classed A7V (Palmer et al., 1968RGOB..135..385P 1968RGOB..135..385P)
HD 16646: F4Vwl (Abt, 1984ApJ...285..247A 1984ApJ...285..247A)
HD 24346: slightly weak-lined F type star (Bidelman, 1988PASP..100.1084B 1988PASP..100.1084B)
HD 41724: Am (Bidelman, 1988PASP..100.1084B 1988PASP..100.1084B;
Carquillat et al., 1988A&AS...75..305C 1988A&AS...75..305C)
HD 48953: G5Ia+A5V (Markowitz, 1969, Ph.D thesis, Ohio State Univ.),
Ap Sr-Eu (Bidelman, 1988PASP..100.1084B 1988PASP..100.1084B)
HD 51565: G2IIIe (Kuhi, 1963PASP...75..448K 1963PASP...75..448K); Am (Smith, 1973ApJS...25..277S 1973ApJS...25..277S)
HD 60178: Castor B
HD 68119: larger proper motion (CDS); moderatly weak-lines F type star
(Bidelman, 1988PASP..100.1084B 1988PASP..100.1084B)
HD 76369: appears normal (Bidelman, 1988PASP..100.1084B 1988PASP..100.1084B)
HD 76370: G5III+A0V (Markovitz, 1969, Ph.D thesis, Ohio State Univ.)
HD 83270: Am (Bidelman, 1988PASP..100.1084B 1988PASP..100.1084B;
Ginestet et al., 1991A&AS...91..265G 1991A&AS...91..265G)
HD 83808: SB2. The dominating spectrum is that of an Am star, the secondary
could be a late F type. Also classified A1V+F6II
(Markovitz, 1969, Ph.D thesis, Ohio State Univ.) and
A5V+F8III (Parsons, 1983ApJS...53..553P 1983ApJS...53..553P)
HD 86167: Am (Abt, 1984ApJ...285..247A 1984ApJ...285..247A)
HD 88923: F2Vwl (Abt, 1984ApJ...285..247A 1984ApJ...285..247A)
HD 91172: Fm Delta Del (Houk & Smoth-Moore, 1988 Catalogue III/133)
HD 97336: Bidelman (1988PASP..100.1084B 1988PASP..100.1084B): "not composite"
HD 107054: A8V (Palmer et al., 1968RGOB..135..385P 1968RGOB..135..385P);
A9IVn (Gray & Garrison, 1989ApJS...69..301G 1989ApJS...69..301G)
HD 114519: RS CVn (SB2), Algol eclipsing type binary;
Batten et al (19899PDAO...17....1B): F4IV-V+K0IV;
Strassmeier & Fekel (1990A&A...230..389S 1990A&A...230..389S): F6IV+G8IV.
The spectrum is difficult to classify because of the high
rotation, but the Ti/Fe ratios suggest a secondary at least as
late as K4.
HD 120544: F7V (Cowley, 1976PASP...88...95C 1976PASP...88...95C)
HD 123102: A9IV (Abt, 1981ApJS...45..437A 1981ApJS...45..437A); visual double, sep. 13.5"
HD 187949: A1V+F4III: (Markowitz, 1969Ph.D thesis, Ohio State Univ.);
Algol type eclipsing binary.
HD 206088: F0p Sr (Bertaud, 1959JO.....42...45B 1959JO.....42...45B)
HD 208132: Am (Bertaud, 1965JO.....48..211B 1965JO.....48..211B)
HD 209790: Am (Slettebak, 1963ApJ...138..118S 1963ApJ...138..118S)
HD 209791: F7V (Slettebak, 1963ApJ...138..118S 1963ApJ...138..118S)
HD 214605: Am (Bidelman, 1988PASP..100.1084B 1988PASP..100.1084B)
HD 239746: B2V comp.? (Niedzielski & Muciek, 1988AcA....38..225N 1988AcA....38..225N)
HD 239933: is not in the CDS database
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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1- 18 A18 --- Ref Code of the reference
20- 38 A19 --- BibCode Bibcode of the reference
40- 68 A29 --- Comm Comment
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References:
Ginestet et al. Paper I. 1994A&AS..108..359G 1994A&AS..108..359G
(End) Patricia Bauer [CDS] 27-Sep-1996