J/MNRAS/368/247 Abundances of 6 suspected CP stars (Catanzaro+, 2006)
Spectroscopic analyses of six suspected chemically peculiar stars.
Catanzaro G.
<Mon. Not. R. Astron. Soc., 368, 247-252 (2006)>
=2006MNRAS.368..247C 2006MNRAS.368..247C
ADC_Keywords: Stars, peculiar ; Abundances, peculiar
Keywords: stars: abundances - stars: chemically peculiar -
stars: individual: HD 155102 - stars: individual: HD 159082 -
stars: individual: HD 162132
Abstract:
The abundance pattern of six stars classified as suspected chemically
peculiar in the General Catalogue of Ap and Am stars (III/162) by
Renson has been derived to ascertain the real nature of these objects.
Spectroscopic observations in the range λλ4800-5600Å
have been carried out at the stellar station of the INAF Catania
Astrophysical Observatory.
Among the studied stars, for only three of them we confirmed their
peculiarity, HD 155102 being a silicon star, HD 159082 a
mercury-manganese star and HD 162132 a moderate metallic A-type star.
The other three objects have chemical abundances not so different from
the standard values derived in the literature for A-type stars and,
furthermore, they do not show light variability. Hence, we suggest
that they could be ruled out from Renson's catalogue.
Description:
Spectroscopic observations were carried out at the 91-cm telescope of
the INAF Catania Astrophysical Observatory. The telescope is linked
with a REOSC spectrograph through an ultraviolet(UV)-near-infrared
fibre of 200-m core diameter.
Objects:
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RA (2000) DE Designation(s) (File)
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17 07 46.7 +40 30 58 HD 155102 = HIP 83816 (tablea1.dat)
17 10 22.7 -15 43 30 HD 155125 = HIP 84012 (tablea2.dat)
17 24 31.5 +16 18 04 HD 157740 = HIP 85185 (tablea3.dat)
17 26 46.1 +34 41 45 HD 158261 = HIP 85382 (tablea4.dat)
17 32 14.9 +11 55 48 HD 159082 = HIP 85826 (tablea5.dat)
17 47 08.0 +47 36 44 HD 162132 = HIP 87045 (tablea6.dat)
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 74 7 Journal of observations
table2.dat 88 13 Derived abundances and errors for the suspected
CP stars of our sample
tablea1.dat 38 44 Spectral lines identified in HD 155102 spectrum
tablea2.dat 38 84 Spectral lines identified in HD 155125 spectrum
tablea3.dat 38 48 Spectral lines identified in HD 157740 spectrum
tablea4.dat 35 44 Spectral lines identified in HD 158261 spectrum
tablea5.dat 35 32 Spectral lines identified in HD 159082 spectrum
tablea6.dat 35 19 Spectral lines identified in HD 162132 spectrum
refs.dat 217 18 References
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See also:
III/162 : General Catalogue of Ap and Am stars (Renson+ 1991)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- --- [HD]
4- 9 I6 --- HD HD number
11- 15 I5 K Teff Effective temperature
17- 19 I3 K e_Teff rms uncertainty on Teff
21- 24 F4.2 [cm/s2] logg Surface gravity
26- 29 F4.2 [cm/s2] e_logg rms uncertainty on logg
31- 32 I2 km/s vsini Rotational velocity
34- 36 F3.1 km/s ksi Microturbulence velocity
38- 50 F13.5 d HJD Heliocentric Julian date
52- 57 F6.2 km/s HRV Heliocentric velocity
59- 62 F4.2 km/s e_HRV rms uncertainty on HRV
64- 74 A11 --- FileName Name of the file containing the spectral
lines identified in the spectrum
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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- 5 A5 --- El Element
7- 11 F5.2 [-] AHD155102 ? HD 155102 abundance (logNel/Ntot)
13- 16 F4.2 [-] e_AHD155102 ? rms uncertainty on AHD155102
18- 22 F5.2 [-] AHD155125 ? HD 155125 abundance (logNel/Ntot)
24- 27 F4.2 [-] e_AHD155125 ? rms uncertainty on AHD155125
29- 33 F5.2 [-] AHD157740 ? HD 157740 abundance (logNel/Ntot)
35- 38 F4.2 [-] e_AHD157740 ? rms uncertainty on AHD157740
40- 44 F5.2 [-] AHD158261 ? HD 158261 abundance (logNel/Ntot)
46- 49 F4.2 [-] e_AHD158261 ? rms uncertainty on AHD158261
51- 55 F5.2 [-] AHD159082 ? HD 159082 abundance (logNel/Ntot)
57- 60 F4.2 [-] e_AHD159082 ? rms uncertainty on AHD159082
62- 66 F5.2 [-] AHD162132 ? HD 162132 abundance (logNel/Ntot)
68- 71 F4.2 [-] e_AHD162132 ? rms uncertainty on AHD162132
73- 77 F5.2 [-] ASun ? Sun Abundance (logNel/Ntot) (1)
79- 83 F5.2 [-] AA-type A-type Abundance (logNel/Ntot) (2)
85- 88 F4.2 [-] e_AA-type rms uncertainty on A-type (2)
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Note (1): Solar values from Grevesse & Sauval, 1998, Space Sci. Rev., 85, 161.
Note (2): Mean abundances derived for A-type stars (Erspamer & North, 2003,
Cat. J/A+A/398/1121).
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Byte-by-byte Description of file: tablea?.dat
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Bytes Format Units Label Explanations
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1- 5 A5 --- El Element
7- 14 F8.3 0.1nm Lambda Laboratory central wavelength
16- 20 F5.1 0.1pm EW Measured equivalent width
22- 27 F6.3 [-] loggf Adopted oscillator strength value
29- 33 F5.2 Sun Abund Derived abundance (logNel/Ntot)
35- 38 A4 --- r_loggf References for oscillator strength value
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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 A1 --- Ref Reference code
3- 21 A19 ---- BibCode BibCode
23- 41 A19 --- Aut Author's name
43-217 A175 --- Com Comments
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 16-Oct-2006