J/MNRAS/356/1256 Elemental abundance analysis of HR 8216 (Caliskan, 2005)
Elemental abundance analysis of magnetic chemically peculiar star HR 8216.
Caliskan H.
<Mon. Not. R. Astron. Soc. 356, 1256 (2005)>
=2005MNRAS.356.1256C 2005MNRAS.356.1256C (SIMBAD/NED BibCode)
ADC_Keywords: Stars, peculiar ; Abundances, peculiar
Keywords: stars: abundances - stars: chemically peculiar -
stars: individual: HR 8216
Abstract:
We have performed the abundance analysis of the cool magnetic CP star
HR 8216 (=HD 204411) using 2.4Å/mm Dominion Astrophysical
Observatory Reticon exposures covering ll 3830-4770Å with a typical
signal-to-noise ratio of 200. The spectrograms were measured
interactively with the graphics computer program REDUCE. We performed
a fine analysis with an ATLAS9 metal-rich model atmosphere whose
predictions best matched the optical region fluxes and the Hg profile.
HR 8216's anomalies are primarily an enhancement of many iron peak
elements with the rare earths elements much less enhanced than for
many similar cool magnetic CP stars .Using the results of the fine
analysis we synthetized the spectrum. Comparison with the observed
spectrum showed that agreement is better.
Objects:
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RA (2000) DE Designation(s) (SpType)
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21 26 51.2 +48 50 05 HR 8216 = HD 204411 (A6peV)
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table6.dat 40 734 Elemental abundances
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See also:
J/A+AS/107/353 : CP stars (Lopez-Garcia+, 1994)
J/A+AS/125/219 : Abundances of mu Lep, 7 Sex, HR 4817 + 28 Her (Adelman+ 1997)
J/A+AS/129/563 : Abundances of HR 4487, 14 Hyd and 3 Cen A (Pintado+ 1998)
J/A+A/354/899 : Elemental abundance analyses IV. (Adelman+, 2000)
J/MNRAS/316/514 : 28 And + 99 Her elemental abundances (Adelman+, 2000)
J/A+A/367/597 : ups Her, phi Her + HR 7018 abundances (Adelman+, 2001)
J/A+A/371/1078 : Elemental abundance of 4 normal B and A stars (Adelman+ 2001)
J/A+A/394/187 : γ Ser + 101 Her elemental abundances (Caliskan+, 2002)
J/A+A/406/975 : Elemental abundances of four A-B stars (Kocer+, 2003)
J/A+A/406/987 : Elemental abundances of three CP stars (Pintado+, 2003)
Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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1- 5 A5 --- Ion Ion name
6- 11 A6 --- No Multiplet number from Moore (1945) if first
line of multiplet, if not from Moore an
initial indicating the paper (1)
13- 19 F7.2 0.1nm Lambda Laboratory wavelength (air)
21- 25 F5.2 --- log(gf) Oscillator strength
28- 29 A2 --- r_log(gf) Reference to oscillator strength (2)
31- 33 I3 0.1pm EW1 ? Equivalent width for HR 8216
35- 40 F6.2 --- log(N/H) ? Elemental abundance for HR 8216 (3)
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Note (1): The following acronyms are used:
C: Catalan et al., 1964, J. Res. NBS, 68A, 9
J: Johansson S., 1978, Phys. Scripta, 18, 217
K: Kurucz & Bell 1995, Kurucz CD-Rom No. 23
MCS: Meggers et al., 1975, Tables of Spectral-Line Intensities, US
Goverment Printing Office, Washington, DC
N: Nave et al., 1994, Cat. J/ApJS/94/221
Note (2): Sources of gf-values are the following:
BG = Biemont et al. (1989A&A...209..391B 1989A&A...209..391B) for V II;
Biemont et al. (1981ApJ...248..867B 1981ApJ...248..867B) for Zr II
BK = Biemont et al. (1982A&A...107..166B 1982A&A...107..166B)
FW = Fuhr & Wiese (1990, in Lide D.R. ed., CRC Handbook of Chemistry
and Physics, CRC Press, Cleveland, OH)
HL = Hannaford et al. (1982ApJ...261..736H 1982ApJ...261..736H)
KX = Kurucz & Bell (1995, Atomic Data for Opacity Calculations, Kurucz
CD-Rom No. 23, (Smithsonian Astrophysical Observatory, Cambridge, MA)
LA = Lanz & Artru (1985PhyS...32..115L 1985PhyS...32..115L)
LD = Lawler & Dakin (1989, JOSA B, 6, 1457)
MF = Fuhr, Martin & Wiese (1988, Cat. VI/72);
Martin, Fuhr & Wiese (1988, Cat. VI/72)
MC = Magazzu & Cowley (1986ApJ...308..254M 1986ApJ...308..254M)
MW = Miles & Wiese (1969, NBS Technical Note No. 474)
WF = Wiese, Fuhr & Deters (1996, J. Phys. Chem. Ref. Data, Monograph 6)
WM = Wiese & Martin (1980, NSRDS-NBS 68, Part.2, US Governement
Printing Office, Washington)
WS = Wiese, Smith & Glennon (1966, NSRDS-NBS 4, US Governement
Printing Office, Washington);
Wiese, Smith & Miles (1969, NSRDS-NBS, D.C., US Department of
Commerce, National Bureau of Standards)
WV = Ward (1985MNRAS.213...71W 1985MNRAS.213...71W)
Note (3): The designations are:
N = number of atoms/volume of particular element
Ntot = number of atoms/volume of all elements
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Acknowledgements: Hulya Caliskan
References:
Moore, 1945, A multiplet table of astrophysical interest,
Princeton, N.J., The Observatory, 1945. Rev. ed.
(End) Patricia Vannier [CDS] 09-Sep-2003