J/ApJ/757/112 Stellar diameters. II. K and M-stars (Boyajian+, 2012)
Stellar diameters and temperatures.
II. Main-sequence K- and M-stars.
Boyajian T.S., von Braun K., van Belle G., McAlister H.A.,
ten Brummelaar T.A., Kane S.R., Muirhead P.S., Jones J., White R.,
Schaefer G., Ciardi D., Henry T., Lopez-Morales M., Ridgway S., Gies D.,
Jao W.-C., Rojas-Ayala B., Parks J.R., Sturmann L., Sturmann J.,
Turner N.H., Farrington C., Goldfinger P.J., Berger D.H.
<Astrophys. J., 757, 112 (2012)>
=2012ApJ...757..112B 2012ApJ...757..112B
ADC_Keywords: Stars, diameters ; Interferometry ; Photometry, infrared ;
Photometry, uvby ; Stars, late-type
Keywords: Hertzsprung-Russell and C-M diagrams; infrared: stars;
planetary systems; stars: atmospheres; stars: fundamental parameters;
stars: general; stars: late-type; stars: low-mass;
techniques: high angular resolution; techniques: interferometric
Abstract:
We present interferometric angular diameter measurements of 21
low-mass, K- and M-dwarfs made with the CHARA Array. This sample is
enhanced by adding a collection of radius measurements published in
the literature to form a total data set of 33 K-M-dwarfs with
diameters measured to better than 5%. We use these data in combination
with the Hipparcos parallax and new measurements of the star's
bolometric flux to compute absolute luminosities, linear radii, and
effective temperatures for the stars. We develop empirical relations
for ∼K0 to M4 main-sequence stars that link the stellar temperature,
radius, and luminosity to the observed (B-V), (V-R), (V-I), (V-J),
(V-H), and (V-K) broadband color index and stellar metallicity [Fe/H].
These relations are valid for metallicities ranging from [Fe/H]=-0.5
to +0.1dex and are accurate to ∼2%, ∼5%, and ∼4% for temperature,
radius, and luminosity, respectively. Our results show that it is
necessary to use metallicity-dependent transformations in order to
properly convert colors into stellar temperatures, radii, and
luminosities.
Description:
We acquired interferometric observations at the CHARA Array with the
Classic beam combiner in single-baseline mode in the near-infrared K'
and H bands for 21 K- and M-type dwarfs (Table 1). The majority of the
data were collected from 2008 through 2011.
File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 52 82 Observation log
table3.dat 49 21 Angular diameters of K- and M-dwarfs
table5.dat 89 1804 Object photometry used in SED fits
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See also:
V/137 : Extended Hipparcos Compilation (XHIP) (Anderson+, 2012)
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
II/237 : Stellar Photometry in Johnson's 11-color system (Ducati, 2002)
II/215 : uvby-beta Catalogue (Hauck+ 1997)
III/198 : Palomar/MSU nearby star spectroscopic survey (Hawley+ 1997)
II/168 : Homogeneous Means in the UBV System (Mermilliod 1991)
II/5 : UBV Photometry of Bright Stars (Johnson+ 1966)
J/ApJ/748/93 : K-band spectra for 133 nearby M dwarfs (Rojas-Ayala+, 2012)
J/ApJ/746/101 : Diameters and temperatures of AFG stars (Boyajian+, 2012)
J/A+A/544/A114 : 1RXS J180431.1-273932 optical identification (Masetti+, 2012)
J/PAZh/37/924 : 1RXS J073346.0+261933 light curve (Denisenko+, 2011)
J/ApJ/742/123 : Photometry and Velocity of LSPM J1112+7626 (Irwin+, 2011)
J/ApJ/728/48 : Multicolor eclipse data for 6 new binaries (Kraus+, 2011)
J/other/A+ARV/18.67 : Accurate masses and radii of normal stars (Torres+, 2010)
J/ApJ/721/412 : Polar CV* 1RXS J173006.4+033813 phot. (Bhalerao+, 2010)
J/ApJ/694/1085 : Radii of exoplanet host stars (van Belle+, 2009)
J/other/RAA/9.1035 : RV light curves of 1RXS J201607.0+251645 (Li+, 2009)
J/A+A/478/507 : Distances & atmospheric param. of MSU stars (Morales+, 2008)
J/ApJS/176/276 : PTI calibrator catalog (van Belle+, 2008)
J/ApJ/683/424 : CHARA observations of 3 late-type stars (Boyajian+, 2008)
J/MNRAS/389/585 : Fundamental parameters of M dwarfs (Casagrande+, 2008)
J/AJ/129/1063 : Abundances of stars within 15pc of the Sun (Luck+, 2005)
J/ApJS/159/141 : Spectroscopic properties of cool stars. I. (Valenti+, 2005)
J/A+A/392/795 : 2 galaxy clusters in multi-wavelengths (Valtchanov+, 2002)
J/A+A/363/1081 : Non-linear limb-darkening law for LTE models (Claret, 2000)
J/A+AS/141/371 : Low-mass stars evolutionary tracks (Girardi+, 2000)
J/PASP/110/863 : A Stellar Spectral Flux Library: 1150-25000 A (Pickles 1998)
J/A+AS/130/65 : A standard stellar library. II. (Lejeune+ 1998)
J/A+A/337/403 : Low-mass stars evolutionary models (Baraffe+ 1998)
J/A+A/327/1039 : Structure and evolution of low-mass stars (Chabrier+ 1997)
J/A+A/325/159 : Companions to M dwarfs within 5pc (Leinert+ 1997)
J/A+AS/117/227 : Dwarf effective temperatures (Alonso+ 1996)
J/AJ/106/773 : Mass-luminosity relation (Henry+, 1993)
J/A+AS/102/89 : uvby-beta Photometry of G5 stars (Olsen 1993)
J/A+A/275/101 : Chemical evolution of the galactic disk I. (Edvardsson+ 1993)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- Name Star identifier
9- 19 A11 "YYYY/MMM/DD" Date UT observation date
21- 25 A5 --- Base Baseline
27- 28 A2 --- Filt Filter (H or K")
30- 31 I2 --- Nb [1/18] Number of bracketed sequences
33- 38 I6 --- Cal1 Calibrator star #1 (HD number)
40- 45 I6 --- Cal2 ? Calibrator star #2 (HD number)
47- 52 I6 --- Cal3 ? Calibrator star #3 (HD number)
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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- 7 A7 --- Name Star identifier
9- 10 I2 --- Nobs [2/51] Number of observations
12- 15 F4.2 --- Chi2 [0.3/3] Reduced χ2
17- 21 F5.3 mas D(UD) [0.6/1.5] Uniform disk diameter θUD
23- 27 F5.3 mas e_D(UD) [0.003/0.02] D(UD) uncertainty
29- 33 F5.3 --- muL [0/1] Linear limb-darkening coefficient
µλ
35- 39 F5.3 mas D(LD) [0.7/1.6] Limb-darkened diameter θLD
41- 45 F5.3 mas e_D(LD) [0.004/0.02] D(LD) uncertainty
47- 49 F3.1 % eLD [0.3/2.2] D(LD) error in %
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 7 A7 --- Name Star identifier
9- 12 I4 nm lambda [1000/3500]? Wavelength λ in Å
14- 16 I3 nm Dlam [200/700]? Bandwidth Δλ in Å
18- 26 A9 --- Phot Photometric system (2MASS, Cousins, Geneva,
Johnson or Stromgren)
28- 29 A2 --- Band Bandpass name in Phot system
31- 35 F5.2 mag mag [1.5/14.6] Observed magnitude in band
37- 40 F4.2 mag e_mag [0/0.5] Uncertainty in mag
42- 68 A27 --- Aut Author's reference name(s)
71- 89 A19 --- BibCode Reference's bibcode
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Acknowledgments: Tabetha S. Boyajian <tabetha(at)chara.gsu.edu>
History:
From electronic version of the journal
References:
Boyajian et al. Paper I. 2012ApJ...746..101B 2012ApJ...746..101B Cat. J/ApJ/746/101
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 11-Jun-2014