J/A+A/547/A91 Spectroscopic analysis of 348 red giants (Zielinski+, 2012)
The Penn State-Torun Centre for Astronomy Planet Search stars.
I. Spectroscopic analysis of 348 red giants.
Zielinski P., Niedzielski A., Wolszczan A., Adamow M., Nowak G.
<Astron. Astrophys. 547, A91 (2012)>
=2012A&A...547A..91Z 2012A&A...547A..91Z
ADC_Keywords: Stars, giant ; Spectroscopy ; Abundances, [Fe/H] ;
Radial velocities ; Stars, masses ; Stars, ages
Keywords: stars: fundamental parameters - stars: atmospheres -
stars: late-type - stars: abundances - planetary systems
Abstract:
We present basic atmospheric parameters (Teff, logg, vt, and [Fe/H])
as well as luminosities, masses, radii, and absolute radial velocities
for 348 stars, presumably giants, from the ∼1000 star sample observed
within the Penn State-Torun Centre for Astronomy Planet Search (PTPS)
with the High Resolution Spectrograph of the 9.2m Hobby-Eberly
Telescope. The stellar parameters (luminosities, masses, radii) are
key to properly interpreting newly discovered low-mass companions,
while a systematic study of the complete sample will create a basis
for future statistical considerations concerning the appearance of
low-mass companions around evolved low- and intermediate-mass stars.
Description:
The atmospheric parameters were derived using a strictly spectroscopic
method based on the LTE analysis of equivalent widths of FeI and FeII
lines. With existing photometric data and the Hipparcos parallaxes, we
estimated stellar masses and ages via evolutionary tracks fitting. The
stellar radii were calculated from either estimated masses and the
spectroscopic logg or from the spectroscopic Teff and estimated
luminosities. The absolute radial velocities were obtained by
cross-correlating spectra with a numerical template.
Our high-quality, high-resolution optical spectra have been collected
since 2004 with the Hobby-Eberly Telescope (HET), located in the
McDonald Observatory. The telescope was equipped with the High
Resolution Spectrograph (HRS; R∼60000 resolution).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 84 348 Basic catalog data for the sample stars
table5.dat 133 348 Derived physical parameters for the red giant
clump sample stars
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See also:
I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)
I/280 : All-sky Compiled Catalogue of 2.5 million stars (Kharchenko+ 2009)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Seq Running sequential number
5- 7 A3 --- --- [TYC]
9- 20 A12 --- TYC Tycho designation (NNNN NNNNN N)
22- 23 A2 --- --- [HD]
25- 30 I6 --- HD ? HD number
32- 33 A2 --- --- [BD]
34- 41 A8 --- BD BD name (+NN NNNA)
43- 52 A10 --- SpT MK spectral type (from Simbad)
54- 58 F5.2 mag Vmag [4.5/10.86] V magnitude (from Tycho & Hipparcos)
60- 64 F5.3 mag B-V B-V colour index (from Tycho and Hipparcos)
66- 70 F5.3 mag e_B-V rms uncertainty on B-V
72- 76 F5.2 mas plx [0.11/15.02]? Hipparcos parallax
78- 81 F4.2 mas e_plx ? rms uncertainty on plx
83- 84 A2 --- Ref [HKTc] Reference (1)
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Note (1): designation of data origin as follows
T = Tycho Catalogue (Perryman & ESA 1997, Cat. I/239)
H = Hipparcos Catalogue (Perryman & ESA 1997, Cat. I/239)
K = Kharchenko & Roeser (2009, Cat. I/280)
Tc = Tycho magnitudes transformed into Johnson magnitudes
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Seq Running sequential number
5- 8 I4 K Teff [4027/6239] Effective temperature
10- 12 I3 K e_Teff rms uncertainty on Teff
14- 17 F4.2 [cm/s2] logg Surface gravity
19- 22 F4.2 [cm/s2] e_logg rms uncertainty on logg
24- 27 F4.2 km/s vt ?=- Microturbulent velocity ξ
29- 32 F4.2 km/s e_vt ? rms uncertainty on vt
34- 38 F5.2 [Sun] [Fe/H] [-1/0.45] Metallicity
40- 43 F4.2 [Sun] e_[Fe/H] ? rms uncertainty on [Fe/H]
45- 52 F8.3 km/s RV [-267/144]?=- Radial velocity from CCF
(cross-correlation function)
54- 58 F5.3 km/s e_RV ? rms uncertainty on RV (mean=0.041km/s)
60- 71 F12.6 d MJD [53023/55633]?=- Epoch of the radial velocity
73- 77 F5.3 mag (B-V)0 Deredenned B-V colour index (1)
79- 83 F5.2 mag VMAG Absolute V magnitude (1)
85- 90 F6.3 mag BCV Bolometric correction on V magnitude (1)
92- 96 F5.2 [Lsun] logL Derived stellar luminosity
98-101 F4.2 [Lsun] e_logL rms uncertainty on logL
103-105 F3.1 Msun Mass [0.6/3.4] Derived stellar mass
107-109 F3.1 Msun e_Mass rms uncertainty on Mass
111-114 F4.1 Rsun R [0.6/66.3] Derived stellar radius
116-118 F3.1 Rsun e_R rms uncertainty on R
120-122 F3.1 Gyr Age [0.3/8]? Age Derived stellar age
124-126 F3.1 Gyr e_Age ? rms uncertainty on Age
127-129 F3.1 Gyr b_Age ? Lower value of Age interval
130 A1 --- --- [-]
131-133 F3.1 Gyr B_Age ? Upper value of Age interval
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Note (1): data obtained from the Alonso et al. (1999A&AS..140..261A 1999A&AS..140..261A)
empirical calibration
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 22-Oct-2012