J/MNRAS/445/2223 Mass estimation for FGK stars (Pinheiro+, 2014)
On the mass estimation for FGK stars: comparison of several methods.
Pinheiro F.J.G., Fernandes J.M., Cunha M.S., Monteiro M.J.P.F.G.,
Santos N.C., Sousa S.G., Marques J.P., Fang J.-J., Mortier A., Sousa J.
<Mon. Not. R. Astron. Soc., 445, 2223-2231 (2014)>
=2014MNRAS.445.2223P 2014MNRAS.445.2223P
ADC_Keywords: Stars, F-type ; Stars, G-type ; Stars, K-type ; Stars, masses
Keywords: methods: numerical - binaries: general -
stars: fundamental parameters -
Hertzsprung-Russell and colour-magnitude diagrams
Abstract:
Stellar evolutionary models simulate well binary stars when individual
stellar mass and system metallicity are known. The mass can be derived
directly from observations only in the case of multiple stellar
systems, mainly binaries. Yet, the number of such stars for which
accurate stellar masses are available is rather small. The main goal
of this project is to provide realistic mass estimates for a
homogeneous sample of about a thousand FGK single stars, using four
different methods and techniques. We present the masses inferred
according to each one of these methods as well as a final mass
estimate consisting in the median of the four mass estimates. The
procedures evaluated here include the use of stellar evolutionary
models, mass-luminosity relation and surface gravity spectroscopic
observations. By combining the results obtained with different
methods, we determine the best mass value for each individual star, as
well as the associated error budget. Our results confirm the expected
consistency between the different mass estimation methods. None the
less, for masses above 1.2M☉, the spectroscopic surface
gravities seem to overestimate the mass. This result may be a
consequence of the spectroscopic surface gravities used in this
analysis. Nevertheless, this problem is minimized by the fact that we
have several approaches available for deriving stellar masses.
Moreover, we suggest an empirical procedure to overcome this issue.
Description:
The objects used in our analysis were taken from the works of Sousa et
al. (2008A&A...487..373S 2008A&A...487..373S, Cat. J/A+A/487/373, 2011A&A...533A.141S 2011A&A...533A.141S,
Cat. J/A+A/533/A141) for which information on their effective
temperature (Teff), luminosity (L), surface gravity (logg) and
metal abundance ([Fe/H]) has been derived in a consistent way.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 98 451 Mass estimate for the targets from Sousa et al.
2008 (J/A+A/487/373) according to different methods
tablea2.dat 97 582 Mass estimate for the targets from Sousa et al.
2011 (J/A+A/533/A141) according to different methods
tablea3.dat 75 22 Mass estimate for the targets from Bruntt et al.
(2010MNRAS.405.1907B 2010MNRAS.405.1907B) according to different methods
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See also:
J/AJ/106/773 : Mass-luminosity relation (Henry+, 1993)
J/A+A/487/373 : Spectroscopic parameters of 451 HARPS-GTO stars (Sousa+, 2008)
J/A+A/533/A141 : Stellar parameters for 582 HARPS FGK stars (Sousa+, 2011)
Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Seq [1/451] Sequential number
5- 14 A10 --- Name Star's identifier
16- 17 I2 h RAh Right ascension (J2000)
19- 20 I2 min RAm Right ascension (J2000)
22- 26 F5.2 s RAs Right ascension (J2000)
28 A1 --- DE- Declination sign (J2000)
29- 30 I2 deg DEd Declination (J2000)
32- 33 I2 arcmin DEm Declination (J2000)
35- 38 F4.1 arcsec DEs Declination (J2000)
40- 44 F5.3 Msun M1 [0.6/1.4] Direct estimation of the stellar
mass using the spectroscopic surface gravity
46- 50 F5.3 Msun e_M1 [0.04/0.12] Error in M1
52- 56 F5.3 Msun M2 [0.1/2.9] Estimation of the stellar mass using
the method of Torres et al. (2010AJ....140.1158T 2010AJ....140.1158T)
58- 62 F5.3 Msun e_M2 [0.03/2.5] Error in M2
64- 68 F5.3 Msun M3 [0.6/1.5] Estimation of the stellar mass
using the method of Henry & McCarthy
(1993AJ....106..773H 1993AJ....106..773H)
70- 74 F5.3 Msun e_M3 [0.05/0.11] Error in M3
76- 80 F5.3 Msun M4 [0.5/1.4] Estimation of the stellar mass using
the Padova models
82- 86 F5.3 Msun e_M4 [0.05/0.08] Error in M4
88- 92 F5.3 Msun M [0.6/1.5] Median of the previous 4 mass estimates
94- 98 F5.3 Msun e_M [0.03/0.08] Error in M
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Byte-by-byte Description of file: tablea2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 --- Seq [1/582] Sequential number
5- 14 A10 --- Name Star's identifier
16- 24 F9.5 deg RAdeg Right ascension (J2000)
26- 34 F9.5 deg DEdeg Declination (J2000)
36- 40 F5.3 Msun M1 [0.6/1.5] Direct estimation of the stellar mass
using the spectroscopic surface gravity
42- 46 F5.3 Msun e_M1 [0.03/0.1] Error in M1
48- 52 F5.3 Msun M2 [0.037/4.1] Estimation of the stellar mass using
the method of Torres et al. (2010AJ....140.1158T 2010AJ....140.1158T)
54- 61 F8.3 Msun e_M2 [0.03/1049] Error in M2
63- 67 F5.3 Msun M3 [0.6/1.8] Estimation of the stellar mass using
method of Henry & McCarthy (1993AJ....106..773H 1993AJ....106..773H)
69- 73 F5.3 Msun e_M3 [0.03/0.13] Error in M3
75- 79 F5.3 Msun M4 [0.5/1.8] Estimation of the stellar mass using
the Padova models
81- 85 F5.3 Msun e_M4 [0.03/0.11] Error in M4
87- 91 F5.3 Msun M [0.5/1.8] Median of the previous 4 mass estimates
93- 97 F5.3 Msun e_M [0.02/0.12] Error in M
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Byte-by-byte Description of file: tablea3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 --- Seq [1/22] Sequential number
5- 15 A11 --- Name Star's identifier
17- 21 F5.3 Msun M1 [0.7/2.2] Direct estimation of the stellar mass
using the spectroscopic surface gravity
23- 27 F5.3 Msun e_M1 [0.05/0.3] Error in M1
29- 33 F5.3 Msun M2 [0.9/2.9] Estimation of the stellar mass using
the method of Torres et al. (2010AJ....140.1158T 2010AJ....140.1158T)
35- 39 F5.3 Msun e_M2 [0.4/1.4] Error in M2
41- 45 F5.3 Msun M3 [0.9/2.5] Estimation of the stellar mass using
method of Henry & McCarthy (1993AJ....106..773H 1993AJ....106..773H)
47- 51 F5.3 Msun e_M3 [0.06/0.2] Error in M3
53- 57 F5.3 Msun M4 [0.7/2.9] Estimation of the stellar mass using
the Padova models
59- 63 F5.3 Msun e_M4 [0.05/0.2] Error in M4
65- 69 F5.3 Msun M [0.8/2.7] Median of the previous 4 mass estimates
71- 75 F5.3 Msun e_M [0.05/0.24] Error in M
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 19-May-2015