J/ApJ/735/41 Carbon and oxygen abundances in FGK stars (Petigura+, 2011)
Carbon and oxygen in nearby stars: keys to protoplanetary disk chemistry.
Petigura E.A., Marcy G.W.
<Astrophys. J., 735, 41 (2011)>
=2011ApJ...735...41P 2011ApJ...735...41P
ADC_Keywords: Abundances ; Stars, nearby ; Stars, late-type ; Spectroscopy
Keywords: catalogs - planetary systems - stars: abundances -
stars: fundamental parameters - techniques: spectroscopic
Abstract:
We present carbon and oxygen abundances for 941 FGK stars -the
largest such catalog to date. We find that planet-bearing systems are
enriched in these elements. We self-consistently measure NC/NO,
which is thought to play a key role in planet formation. We identify
46 stars with NC/NO≥1.00 as potential hosts of carbon-dominated
exoplanets. We measure a downward trend in [O/Fe] versus [Fe/H] and
find distinct trends in the thin and thick disks, supporting the work
of Bensby et al. Finally, we measure sub-solar
NC/NO=0.40+0.11-0.07, for WASP-12, a surprising result as this
star is host to a transiting hot Jupiter whose dayside atmosphere was
recently reported to have NC/NO≥1 by Madhusudhan et al. Our
measurements are based on 15,000 high signal-to-noise spectra taken
with the Keck 1 telescope as part of the California Planet Search. We
derive abundances from the [OI] and CI absorption lines at
λ=6300 and 6587Å using the SME spectral synthesizer.
Description:
The stellar sample is drawn from the Spectroscopic Properties of Cool
Stars (SPOCS) catalog (Valenti & Fischer 2005, Cat. J/ApJS/159/141) and
from the N2K ("Next 2000") sample (Fischer et al. 2005ApJ...620..481F 2005ApJ...620..481F).
Our spectra were taken with HIRES, the High Resolution Echelle
Spectrograph, between 2004 August and 2010 April on the Keck 1
Telescope.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table6.dat 107 942 Stellar data: atmospheric poarameters and abundances
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See also:
I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)
J/A+A/547/A106 : Li abundances in the FGK dwarfs (Mishenina+, 2012)
J/A+A/533/A141 : Stellar parameters for 582 HARPS FGK stars (Sousa+, 2011)
J/A+A/526/A71 : C abundances in G and K nearby stars (Da Silva+, 2011)
J/A+A/465/271 : Oxygen abundances in nearby stars (Ramirez+, 2007)
J/ApJS/168/297 : Stellar parameters of nearby cool stars (Takeda+, 2007)
J/AJ/129/1063 : Abundances of stars within 15pc of the Sun (Luck+, 2005)
J/PASJ/57/65 : CNO abundances of solar-type stars (Takeda+, 2005)
J/ApJS/159/141 : Spectroscopic properties of cool stars. I. (Valenti+, 2005)
J/ApJS/141/503 : Radial Velocities for 889 late-type stars (Nidever+, 2002)
Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Name Source name or HD number (1)
11- 16 F6.2 mag Vmag [-26.7/11.7] HIP catalog Johnson V band
magnitude (2)
18- 20 I3 pc Dist [0/127]? HIP distance (2)
22- 25 I4 K Teff [4707/6441] Effective temperature (3)
27- 30 F4.2 [cm/s2] log(g) [2.7/5.0] Log of the surface gravity (3)
32- 36 A5 --- Pop Membership from Peek 2009PhDT.......205P 2009PhDT.......205P:
dn=thin disk; dk=thick disk; h=halo
38- 40 A3 --- Host [yes/no ] Does star host a planet?
42- 46 F5.2 [-] [M/H] (All elements heavier than He)/H abundance (3)
48- 52 F5.2 [-] [Ni/H] [-2/0.69] The Ni/H abundance
54- 56 I3 --- NO [0/421] Number of oxygen lines fit for each star
58- 62 F5.2 [-] [O/H] [-0.91/0.43]? The O/H abundance
64- 67 F4.2 [-] e_[O/H] ? Lower limit uncertainty in [O/H]
69- 72 F4.2 [-] E_[O/H] ? Upper limit uncertainty in [O/H]
74- 76 I3 --- NC [0/294] Number of carbon lines fit for each star
78- 82 F5.2 [-] [C/H] [-0.52/0.52]? The C/H abundance (5)
84- 87 F4.2 [-] e_[C/H] ? Lower limit uncertainty in [C/H]
89- 92 F4.2 [-] E_[C/H] ? Upper limit uncertainty in [C/H]
94- 97 F4.2 --- C/O [0.24/1.55]? The C/O abundance (5)
99-102 F4.2 --- e_C/O ? Lower limit uncertainty in C/O
104-107 F4.2 --- E_C/O ? Upper limit uncertainty in C/O
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Note (1): "GANYMEDE" has been replaced by "Sun" by the CDS.
Note (2): Where stars were not in the HIP catalog (Cat. I/239), Vmag and Dist
are from the Geneva-Copenhagen Catalog (Nordstrom et al.
2004Msngr.118...61N 2004Msngr.118...61N, Cat. V/117). Vmag and Dist are taken
from SIMBAD as a last resort.
Note (3): Stellar parameters from Spectroscopic Properties of Cool Stars
(SPOCS) catalog (Cat. J/ApJS/159/141) and D. Fischer (2008, private
communication).
Note (5): We have corrected these abundances a for a systematic trend in
temperature (see Section 4.1).
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 29-Nov-2012