J/ApJS/222/19 KPNO spectroscopy of G & K dwarfs HIP stars (Kim+, 2016)
Spectroscopic survey of G and K dwarfs in the Hipparcos catalog.
I. Comparison between the Hipparcos and photometric parallaxes.
Kim B., An D., Stauffer J.R., Lee Y.S., Terndrup D.M., Johnson J.A.
<Astrophys. J. Suppl. Ser. 222, 19 (2016)>
=2016ApJS..222...19K 2016ApJS..222...19K (SIMBAD/NED BibCode)
ADC_Keywords: Abundances, [Fe/H] ; Stars, nearby ; Equivalent widths ;
Spectroscopy ; Photometry, UBV
Keywords: open clusters and associations: individual: the Pleiades;
solar neighborhood; stars: abundances; stars: distances
Abstract:
The tension between the Hipparcos parallax of the Pleiades and other
independent distance estimates continues even after the new reduction
of the Hipparcos astrometric data and the development of a new
geometric distance measurement for the cluster. A short Pleiades
distance from the Hipparcos parallax predicts a number of stars in the
solar neighborhood that are sub-luminous at a given photospheric
abundance. We test this hypothesis using the spectroscopic abundances
for a subset of stars in the Hipparcos catalog, which occupy the same
region as the Pleiades in the color-magnitude diagram. We derive
stellar parameters for 170 nearby G- and K-type field dwarfs in the
Hipparcos catalog based on high-resolution spectra obtained using KPNO
4m echelle spectrograph. Our analysis shows that, when the Hipparcos
parallaxes are adopted, most of our sample stars follow empirical
color-magnitude relations. A small fraction of stars are too faint
compared to main-sequence fitting relations by ΔMV≳0.3mag,
but the differences are marginal at a 2σ level, partly due to
relatively large parallax errors. On the other hand, we find that the
photometric distances of stars showing signatures of youth as
determined from lithium absorption line strengths and R'HK
chromospheric activity indices are consistent with the Hipparcos
parallaxes. Our result is contradictory to a suggestion that the
Pleiades distance from main-sequence fitting is significantly altered
by stellar activity and/or the young age of its stars, and provides an
additional supporting evidence for the long-distance scale of the
Pleiades.
Description:
We selected a random subset of Hipparcos field stars that satisfy our
color-magnitude cut, and obtained their high-resolution (R∼60000)
spectra with the echelle spectrograph on the Mayall 4m telescope at
Kitt Peak National Observatory (KPNO). Our observing campaign was
composed of five nights in 2010 May and four nights in 2010 September.
The wavelength coverages were set to 4340-7670Å in May, and
4400-7870Å in September.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 72 170 Photometric properties of the KPNO sample
table3.dat 40 87 *Stellar parameters derived using MOOG
table6.dat 75 170 *Stellar parameters derived using the automated
spectral matching technique (SMT)
table7.dat 56 170 δMV, ΔMV, and lithium EWs of
the KPNO sample
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Note on table3.dat: MOOG is a spectral synthesis code (Sneden C.A. 1973,
PhD thesis, the University of Texas at Austin);
see http://www.as.utexas.edu/~chris/moog.html
See section 3.1 for further explanations.
Note on table6.dat: For the entire sample (including those analyzed using MOOG),
we employed an automated spectral matching technique (SMT) that iteratively
fits synthetic spectra to an observed spectrum to search for the best matching
parameters with the least human intervention.
See section 3.2 for further explanations.
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See also:
B/sb9 : SB9: 9th Catalog of Spectroscopic Binary Orbits (Pourbaix+, 2004-2014)
I/311 : Hipparcos, the New Reduction (van Leeuwen, 2007)
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
I/259 : The Tycho-2 Catalogue (Hog+ 2000)
I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)
J/AJ/148/30 : BVI photometry of 350 Pleiades stars (Kamai+, 2014)
J/A+A/562/A71 : Abundances of solar neighborhood dwarfs (Bensby+, 2014)
J/A+A/551/L8 : Chromospheric activity of field stars (Pace, 2013)
J/ApJ/757/161 : Spectroscopy of 56 exoplanet host stars (Torres+, 2012)
J/A+A/512/A54 : Teff and Fbol from Infrared Flux Method (Casagrande+, 2010)
J/AJ/137/4377 : List of SEGUE plate pairs (Yanny+, 2009)
J/ApJ/687/1264 : Age estimation for solar-type dwarfs (Mamajek+, 2008)
J/AJ/136/2050 : SEGUE stellar parameter pipeline. II. (Lee+, 2008)
J/ApJS/172/663 : Infrared observations of the Pleiades (Stauffer+, 2007)
J/ApJS/159/141 : Spectroscopic properties of cool stars. I. (Valenti+, 2005)
J/A+A/417/651 : NEXXUS ROSAT survey of coronal X-ray (Schmitt+, 2004)
J/A+A/410/527 : Abundances in the Galactic disk (Bensby+, 2003)
J/A+A/367/111 : A Hipparcos study of the Hyades cluster (de Bruijne+, 2001)
J/A+A/347/348 : Solar abundance of iron (Grevesse+, 1999)
J/A+AS/135/319 : ROSAT data of Nearby Stars (Huensch+ 1999)
J/A+A/332/575 : Pleiades member list (Belikov+ 1998)
J/AJ/106/1059 : Lithium in the Pleiades (Soderblom+, 1993)
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 [1674/118278] HIP number
8 A1 --- f_HIP [c] Flag on HIP (1)
10- 16 A7 --- HD HD name if any
18- 21 F4.2 mag Vmag [4.6/9.9] V-band magnitude (2)
23- 26 F4.2 mag e_Vmag [0.02/0.05] Vmag uncertainty
28- 31 F4.2 mag B-V [0.6/1] B-V color index (2)
33- 36 F4.2 mag e_B-V [0.02/0.08] B-V uncertainty
38- 41 F4.2 mag V-Ks [1.4/2.9]? V-Ks color index
43- 46 F4.2 mag e_V-Ks [0.03/0.05]? V-Ks uncertainty
48- 53 F6.2 arcsec Plx [12.5/173.8] Parallax (3)
55- 58 F4.2 arcsec e_Plx [0.1/2.2] Plx uncertainty (3)
60- 63 F4.2 mag VMag [4.8/7.3] Absolute V-band magnitude computed
from the Hipparcos parallax
65- 68 F4.2 mag e_VMag [0.02/0.2] VMag uncertainty
70 I1 --- Ns [1/3]? Number of observations in spring
72 I1 --- Na [1/3]? Number of observations in autumn
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Note (1):
c = A spectroscopic binary listed in the ninth catalog of spectroscopic binary
orbits (Pourbaix et al. 2004, http://sb9.astro.ulb.ac.be/; Cat. B/sb9).
Note (2): We took BV photometry from the NASA Star and Exoplanet Database
(NStED), most of which are those transformed from BTVT in the
Tycho-2 catalog (Hog et al. 2000, I/259) using transformation
equations found in Mamajek et al. (2002, J/AJ/124/1670;
2006AJ....131.2360M 2006AJ....131.2360M).
Note (3): Parallaxes and parallax errors from the revised Hipparcos catalog
(van Leeuwen 2007, I/311).
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- HIP [4907/118278] HIP number
8 A1 --- f_HIP [b] Flag on HIP (1)
10- 13 I4 K Teff [4904/5949] Effective temperature
15- 18 F4.2 [cm/s2] logg [3.2/4.6] Log of surface gravity
20- 24 F5.2 [-] [Fe/H] [-1.5/0.1] Abundance [Fe/H]
26- 28 F3.1 km/s Vt [0.8/1.7] Microturbulent velocity
30- 34 F5.2 [-] [Fe/H]c [-1.4/0.2] Abundance [Fe/H] corrected (G1)
36- 40 F5.3 [-] e_[Fe/H] [0.009/0.04] [Fe/H] uncertainty
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Note (1):
b = Stars with less accurate parallax measurements (σπ/π>3%),
but included as having larger magnitude excesses (ΔMV) than
the Pleiades.
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Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- HIP [1674/118278] HIP number
8- 11 I4 K Teff [4817/6456] SMT3 effective temperature (1)
13- 15 I3 K e_Teff [9/249] Teff uncertainty
17- 20 F4.2 [cm/s2] logg [3.9/4.9] SMT3 log of surface gravity (1)
22- 26 F5.3 [cm/s2] e_logg [0.01/0.3] logg uncertainty
28- 32 F5.2 [-] [Fe/H] [-1.4/0.2] SMT3 abundance of [Fe/H] (1)
34- 38 F5.3 [-] e_[Fe/H] [0.009/0.3] [Fe/H] uncertainty
40- 44 F5.2 [-] [Fe/H]c [-1.4/0.1] Corrected [Fe/H] (G1)
46- 49 I4 K Teff2 [4546/6019] SMT2 effective temperature (1)
51- 52 I2 K e_Teff2 [28/79] Teff2 uncertainty
54- 57 F4.2 [cm/s2] logg2 [3.4/4.9] SMT2 log of surface gravity (1)
59- 63 F5.3 [cm/s2] e_logg2 [0.007/0.3] logg2 uncertainty
65- 69 F5.2 [-] [Fe/H]2 [-1.9/0.4] SMT2 abundance of [Fe/H] (1)
71- 75 F5.3 [-] e_[Fe/H]2 [0.007/0.2] [Fe/H]2 uncertainty
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Note (1):
SMT2 = SMT analysis based on Infrared Flux Method (IRFM) temperatures;
SMT3 = SMT with the full three-parameter fitting.
See section 3.2 for further explanations.
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Byte-by-byte Description of file: table7.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- HIP [1674/118278] HIP number
8- 11 F4.2 mag dVMag [0.2/1.4] δMV from B-V
13- 16 F4.2 mag e_dVMag [0.1/0.5] delVMag uncertainty
18- 22 F5.2 mag delVMag2 [-1/0.6] Absolute V-band magnitude excess
(ΔMV) from B-V using SMT3
24- 27 F4.2 mag e_delVMag2 [0.1/0.43] delVMag2 uncertainty
29- 33 F5.2 mag delVMag3 [-0.3/0.6]? Absolute V-band magnitude excess
(ΔMV) from B-V using MOOG
35- 38 F4.2 mag e_delVMag3 [0.1/0.5]? delVMag3 uncertainty
40- 44 F5.2 mag dVMag4 [-1/0.7]? δMV from V-Ks
(see section 4.2)
46- 49 F4.2 mag e_dVMag4 [0.06/0.2]? delVMag4 uncertainty
51- 56 F6.2 0.1pm W(Li) [7.3/128.7]? Lithium equivalent width
in milliangstroms
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Global note:
Note (G1): Corrected to match the metallicity scale of VF05 (Valenti+, 2005,
J/ApJS/159/141; see text).
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History:
From electronic version of the journal
(End) Emmanuelle Perret [CDS] 29-Jul-2016