J/A+A/364/102 Abundances of field BHB star candidates (Kinman+, 2000)
A spectroscopic study of field BHB star candidates
Kinman T., Castelli F., Cacciari C., Bragaglia A., Harmer D., Valdes F.
<Astron. Astrophys. 364, 102 (2000)>
=2000A&A...364..102K 2000A&A...364..102K (SIMBAD/NED BibCode)
ADC_Keywords: Stars, blue ; Abundances ; Equivalent widths
Keywords: stars: abundances - stars: fundamental parameters -
stars: horizontal-branch - stars: AGB and post-AGB -
stars: white dwarfs - Galaxy: halo
Abstract:
New spectroscopic observations are presented for a sample of
thirty-one blue horizontal branch (BHB) star candidates that are
sufficiently nearby to have reliable proper motions. Comments are
given on a further twenty-five stars that have previously been
suggested as BHB star candidates but which were not included in our
sample. Moderately high-resolution spectra
(λ/Δλ≃15000) of twenty five of our program stars
were taken with the coude feed spectrograph at Kitt Peak. Twelve of
the program stars were also observed with the CAT spectrograph at ESO.
Six of these program stars were observed from both hemispheres. IUE
low-resolution spectra are available for most of our candidates and
were used, in addition to other methods, in the determination of their
Teff and reddening. Abundances were obtained from these spectra
using models computed by Castelli with an updated version of the
ATLAS9 code (Kurucz, 1993, CD-ROM No. 13). All thirty one candidates
are halo stars.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
stars.dat 57 29 Star positions and magnitudes (from Simbad)
table4.dat 56 601 KPNO equivalent widths and abundances
table5.dat 56 69 ESO-CAT equivalent widths and abundances
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See also:
J/AJ/108/1722 : Blue horizontal branch stars (Kinman+ 1994)
J/A+AS/109/171 : Blue horizontal branch stars catalog (Flynn+, 1995)
J/A+A/347/69 : Abundances of halo early-type stars (Rolleston+, 1999)
Byte-by-byte Description of file: stars.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Name Object name
15- 16 I2 h RAh Right ascension (J2000.0)
18- 19 I2 min RAm Right ascension (J2000.0)
21- 24 F4.1 s RAs Right ascension (J2000.0)
26 A1 --- DE- Declination sign (J2000.0)
27- 28 I2 deg DEd Declination (J2000.0)
30- 31 I2 arcmin DEm Declination (J2000.0)
33- 34 I2 arcsec DEs Declination (J2000.0)
38- 42 F5.2 mag Bmag ? B magnitude
44- 48 F5.2 mag Vmag ? V magnitude
50- 69 A20 --- SpType Spectral type
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Byte-by-byte Description of file: table4.dat table5.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Name Star name
13- 20 F8.3 0.1nm lambda Wavelength
22- 25 A4 --- El Element
27- 31 A5 --- mult Multiplet number
33- 38 F6.3 --- loggf Oscillator strength
40- 43 A4 --- r_loggf Source of log gf (1)
46- 48 I3 0.1pm EW ? Equivalent width
49 A1 --- u_EW Uncertainty flag on EW
51- 56 F6.2 --- log[El/Ntot] ? Elemental abundance
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Note (1): Source of log gf (only in table4.dat):
KP : Kurucz & Peytremann 1975, Cat. VI/10
NSB1 : Wiese, Smith & Miles 1969, NSRDS-NBS Vol. II
NSB2 : Wiese & Fuhr 1975, J. Phys. Chem. Ref. Data 4. 263
NSB2 : Miles & Wiese 1969, NBS technical Note 274
MFW : Martin, Fuhr & Wiese 1984, Cat. VI/72
FMW : Fuhr, Martin & Wiese 1988, Cat. VI/72
BK : Bridges & Kornblith 1974ApJ...192..793B 1974ApJ...192..793B
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Acknowledgements: Angela Bragaglia
(End) Patricia Bauer [CDS] 18-Dec-2000