J/A+A/536/A71 Atmospheric parameters of nearby giant stars (Jones+, 2011)
Study of the impact of the post-MS evolution of the host star on the orbits of
close-in planets.
I. Sample definition and physical properties.
Jones M.I., Jenkins J.S., Rojo P., Melo C.H.F.
<Astron. Astrophys. 536, A71 (2011)>
=2011A&A...536A..71J 2011A&A...536A..71J
ADC_Keywords: Stars, giant ; Abundances, [Fe/H] ; Rotational velocities ;
Spectroscopy
Keywords: stars: fundamental parameters - stars: horizontal-branch -
planet-star interactions
Abstract:
We are conducting a precision radial velocity study of a sample of 164
nearby giant stars in the southern hemisphere. In this work we
present the spectroscopic atmospheric parameters (Teff, logg , vmic
and [Fe/H]) for all of our targets. By comparing the position on the
HR diagram with stellar evolutionary tracks, we derived the mass,
radius and evolutionary status for every star in our sample. In
addition, rotational velocities are also measured.
Description:
We used high resolution and high S/N spectra to measure the equivalent
widths of many FeI and FeII lines, which were used to derive the
atmospheric parameters by imposing local thermodynamic and ionization
equilibrium. The effective temperatures and metallicities were used,
along with stellar evolutionary tracks to determine the physical
properties and evolutionary status of each star.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 86 164 Spectroscopic atmospheric parameters for all of
our targets
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See also:
I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)
I/311 : Hipparcos, the New Reduction (van Leeuwen, 2007)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- HIP The Hipparcos identification number (1)
8- 11 F4.2 mag B-V Hipparcos B-V color index (1)
13- 16 F4.2 mag Vmag Hipparcos apparent V magnitude (1)
18- 22 F5.2 mas plx Hipparcos parallax (2)
24- 27 F4.2 mas e_plx Error in parallax (2)
29- 33 F5.3 mag AV Visual extinction (3)
35- 38 I4 K Teff Effective temperature
40- 43 F4.2 [cm/s2] logg Spectroscopic surface gravity
45- 48 F4.2 km/s vt Microturbulent velocity ξ
50- 54 F5.2 [Sun] [Fe/H] Iron abundance relative to the sun
56- 59 F4.2 [Sun] e_[Fe/H] Error in [Fe/H]
61- 65 F5.3 [Lsun] logL Logarithmic absolute luminosity
67- 70 F4.2 Msun Mass Mass derived from spectral parameters and
evolutionary tracks (4)
72- 77 F6.3 Rsun Rad Stellar radius (4)
79- 81 A3 --- St [RGB HB] Evolutionary status (Red Giant
or Horizontal Branch star)
83- 86 F4.2 km/s vsini Projected rotational velocity
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Note (1): Hipparcos catalogue. Perryman et al. (1997A&A...323L..49P 1997A&A...323L..49P, Cat. I/239)
Note (2): Improved reduction of Hipparcos data.
van Leeuwen (2007A&A...474..653V 2007A&A...474..653V, Cat. I/311)
Note (3): Computed from Arenou et al. (1992A&A...258..104A 1992A&A...258..104A) 3-D extinction maps.
Note (4): Physical parameters derived comparing the position in the HR
diagram with evolutionary tracks from Salasnich et al. (2000, Cat.
J/A+A/361/1023)
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Acknowledgements:
Matias Jones, mjones(at)das.uchile.cl
(End) Patricia Vannier [CDS] 03-Nov-2011