J/ApJ/804/146 Atmospheric parameters for nearby B-F stars (David+, 2015)
The ages of early-type stars: Stromgren photometric methods calibrated,
validated, tested, and applied to hosts and prospective hosts of directly
imaged exoplanets.
David T.J., Hillenbrand L.A.
<Astrophys. J., 804, 146 (2015)>
=2015ApJ...804..146D 2015ApJ...804..146D
ADC_Keywords: Photometry, uvby, beta ; Stars, ages ; Stars, masses ;
Rotational velocities ; Effective temperatures ; Models
Keywords: catalogs; Hertzsprung-Russell and C-M diagrams; planetary systems;
stars: early-type; stars: evolution; stars: fundamental parameters
Abstract:
Age determination is undertaken for nearby early type (BAF) stars,
which constitute attractive targets for high-contrast debris disk and
planet imaging surveys. Our analysis sequence consists of acquisition
of ubvyβ photometry from catalogs, correction for the effects of
extinction, interpolation of the photometry onto model atmosphere
grids from which atmospheric parameters are determined, and finally,
comparison to the theoretical isochrones from pre-main sequence
through post-main sequence stellar evolution models, accounting for
the effects of stellar rotation. We calibrate and validate our methods
at the atmospheric parameter stage by comparing our results to
fundamentally determined Teff and log g values. We validate and test
our methods at the evolutionary model stage by comparing our results
on ages to the accepted ages of several benchmark open clusters
(IC2602, α Persei, Pleiades, Hyades). Finally, we apply our
methods to estimate stellar ages for 3493 field stars, including
several with directly imaged exoplanet candidates.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 85 8 Open cluster ages
table5.dat 125 3493 Ages, masses, and atmospheric parameters of
nearby B0-F5 field stars
table8.dat 87 31 IC 2602 members dereddened uvbyHβ photometry
and atmospheric parameters
table9.dat 87 51 α Persei members dereddened uvbyHβ
photometry and atmospheric parameters
table10.dat 87 47 Pleiades members dereddened uvbyHβ photometry
and atmospheric parameters
table11.dat 87 47 Hyades members dereddened uvbyHβ photometry
and atmospheric parameters
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See also:
V/137 : Extended Hipparcos Compilation (XHIP) (Anderson+, 2012)
V/136 : Teff and metallicities for Tycho-2 stars (Ammons+, 2006)
III/244 : Catalog of Stellar Rotational Velocities (Glebocki+ 2005)
II/215 : uvby-beta Catalogue (Hauck+ 1997)
J/A+A/568/A119 : Stellar physical parameters for young stars (Monguio+, 2014)
J/MNRAS/437/1216 : VAST Survey. A-type stars multiplicity (De Rosa+, 2014)
J/MNRAS/426/3403 : UKIDSS-GCS α Per members (Lodieu+, 2012)
J/MNRAS/422/1495 : UKIDSS Galactic Cl. Survey Pleiades members (Lodieu+ 2012)
J/A+A/544/A9 : The International Deep Planet Survey. I. (Vigan+, 2012)
J/ApJ/752/58 : α Per cluster members (Zuckerman+, 2012)
J/AJ/143/135 : Ages of A-K type stars in DEBRIS survey (Vican, 2012)
J/ApJ/746/101 : Diameters and temperatures of AFG stars (Boyajian+, 2012)
J/A+A/537/A146 : Stellar models with rotation (Z=0.014) (Ekstrom+, 2012)
J/A+A/537/A120 : Rotational velocities of A-type stars. IV. (Zorec+, 2012)
J/A+A/530/A138 : Geneva-Copenhagen survey re-analysis (Casagrande+, 2011)
J/MNRAS/410/190 : Young runaway stars within 3kpc (Tetzlaff+, 2011)
J/A+A/525/A71 : Atmospheric parameters for 1273 stars (Wu+, 2011)
J/A+A/523/A71 : A and F stars abundances in the Hyades (Gebran+, 2010)
J/other/A+ARV/18.67 : Accurate masses and radii of normal stars (Torres+, 2010)
J/ApJ/694/1085 : Radii of exoplanet host stars (van Belle+, 2009)
J/A+A/493/1099 : CaII HK emission in rotating stars (Schroeder+, 2009)
J/ApJ/687/1264 : Age estimation for solar-type dwarfs (Mamajek+, 2008)
J/MNRAS/387/105 : Isochrone database for single & binary star SSPs (Li+, 2008)
J/ApJ/680/728 : Diameters of exoplanet host stars (Baines+, 2008)
J/ApJS/172/663 : Infrared observations of the Pleiades (Stauffer+, 2007)
J/ApJ/660/1556 : Characterization of dusty debris disks (Rhee+, 2007)
J/ApJS/168/297 : Stellar parameters of nearby cool stars (Takeda+, 2007)
J/ApJ/653/675 : Spitzer 24µm photometry of A dwarfs (Su+, 2006)
J/AJ/132/161 : NStars project: The southern sample. I. (Gray+, 2006)
J/A+A/454/333 : Computed Hbeta indices from ATLAS9 model (Castelli+, 2006)
J/A+A/436/853 : IR photometry of Alpha Per low-mass members (Lodieu+, 2005)
J/ApJS/159/141 : Spectroscopic properties of cool stars. I. (Valenti+, 2005)
J/ApJ/622/1102 : The planet-metallicity correlation. (Fischer+, 2005)
J/ApJ/620/1010 : Spitzer 24µm photometry of A dwarfs (Rieke+, 2005)
J/AJ/127/1227 : Synthetic Stroemgren photometry (Clem+, 2004)
J/A+A/354/881 : RVs of Praesepe + Hyades Am stars (Debernardi+ 2000)
J/A+A/352/555 : Fundamental parameters of stars (Allende Prieto+, 1999)
J/A+A/331/81 : Hyades membership (Perryman+ 1998)
J/A+AS/96/269 : Stellar Models from 0.8 to 120 Msolar (Schaller+, 1992)
Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Cl Cluster name
11 A1 --- f_Cl [*] Note on Cl (1)
13- 15 I3 Myr Age [46/625] Age from literature (2)
17- 18 I2 Myr E_Age [6/50] Positive error on Age
20- 21 I2 Myr e_Age [5/50] Negative error on Age
23- 56 A34 --- Ref Evolutionary model reference
58- 60 I3 Myr Agemed [79/872] Median Age from summed PDF
62- 64 I3 Myr Age68lo [27/518] 68% min age from summed PDF
66- 69 I4 Myr Age68up [284/1940] 68% max age from summed PDF
71- 73 I3 Myr AgemedM [42/827] Median Age from multiplied PDF
75- 77 I3 Myr Age68loM [41/812] 68% min age from multiplied PDF
79- 81 I3 Myr Age68upM [46/837] 68% max age from multiplied PDF
83- 85 I3 Myr Chi2 [37/631] Χ2min (3)
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Note (1):
* = Note, the Hyades analysis includes the blue straggler HD 27962 and the
spectroscopic binary HD 27268. Excluding these outliers results in a
median and 68% confidence interval of 871Myr [517-1839Myr] of the summed
probability distribution function (PDF) or 832Myr [812-871Myr] of the
multiplied PDF, using the B12 (Bressan et al. 2012MNRAS.427..127B 2012MNRAS.427..127B) models.
Note (2): Literature ages come from the sources referenced in Section 6.
Note (3): The best-fit isochrone found through Χ2-minimization of all
cluster members in log(Teff)-log(g) space.
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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- 6 I6 --- HIP [23/120082] Hipparcos Input Catalogue
running number
8- 12 I5 K Teff [5476/24718] Photometric effective
temperature (G1)
14- 16 I3 K e_Teff [186/840] Uncertainty in Teff
18- 21 F4.2 [cm/s2] log(g) [1.5/5.2] Log photometric surface
gravity (G1)
23- 26 F4.2 [cm/s2] e_log(g) [0.14] Uncertainty in log(g)
28- 30 I3 km/s vsini [4/360]? Projected rotational
velocity (2)
34 I1 --- r_vsini [0/1]? References for vsini (3)
36- 39 I4 Myr Ageavg [6/5392]? Mean age from 1D posterior PDF
(agePDFavg) (4)
41- 44 I4 Myr Agemed [7/5722]? Median age from 1D posterior PDF
(agePDFmed) (4)
46- 49 I4 Myr Agemod [9/8785]? Mode age from 1D posterior PDF
(agePDFmod) (4)
51- 54 I4 Myr Age68lo [4/5709]? 68% min age from 1D posterior PDF
(agePDF68min)
56- 59 I4 Myr Age68up [12/9034]? 68% max age from 1D posterior PDF
(agePDF68max)
61- 62 I2 % Age68t [1/68]?=0 True age interval for agePDF68
(agePDF68t) (5)
64- 67 I4 Myr Age95lo [1/5692]? 95% min age from 1D posterior PDF
(agePDF95min)
69- 72 I4 Myr Age95up [14/9146]? 95% max age from 1D posterior PDF
(agePDF95max)
74- 75 I2 % Age95t [1/95]?=0 True age interval for agePDF95
(agePDF95t) (5)
77- 80 I4 Myr Age2D [0/7671]? Age from 2D linear interpolation (4)
82- 85 F4.2 Msun Mavg [1/9.6]? Mean mass from 1D posterior PDF
(massPDFavg) (4)
87- 90 F4.2 Msun Mmed [1/10]? Median mass from 1D posterior PDF
(massPDFmed) (4)
92- 95 F4.2 Msun Mmod [1/10]? Mode mass from 1D posterior PDF
(massPDFmod) (4)
97- 99 F3.1 Msun M68lo [1/10]? 68% min mass from 1D posterior PDF
(massPDF68min)
101-104 F4.1 Msun M68up [1/10]? 68% max mass from 1D posterior PDF
(massPDF68max)
106-107 I2 % M68t [2/68]?=0 True mass interval for massPDF68
(massPDF68t) (5)
109-111 F3.1 Msun M95lo [1/10]? 95% min mass from 1D posterior PDF
(massPDF95min)
113-116 F4.1 Msun M95up [1/10]? 95% max mass from 1D posterior PDF
(massPDF95max)
118-119 I2 % M95t [3/95]?=0 True mass interval for massPDF95
(massPDF95t) (5)
121-125 F5.2 Msun M2D [1/11]? Mass from 2D linear interpolation
(mass2D) (4)
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Note (2): If no vsin(i) is listed then the star belongs to the late group
(roughly spectral types A3-F5) and no rotation correction was performed.
Note (3): Reference as follows:
0 = Glebocki & Gnacinski 2005yCat.3244....0G 2005yCat.3244....0G
1 = Assumed vsin(i) calculated from Teff-vsin(i) relation
in Appendix B of Gray 2005oasp.book.....G 2005oasp.book.....G
Note (4): All ages and masses are computed from the evolutionary models from
Bressan et al. (2012MNRAS.427..127B 2012MNRAS.427..127B) with solar metallicity (Z=0.01524)
Note (5): True 68% and 95% confidence intervals as obtained due to
numerical precision, the star's location near the edge of the
computational grid, or some combination of the two effects.
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Byte-by-byte Description of file: table[89].dat table1[01].dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 A9 --- Cl Cluster Name
11- 25 A15 --- Star Star name
27- 35 A9 --- SpT MK spectral type (1)
37- 42 F6.3 mag b-y0 [-0.1/0.4] Dereddened (b-y) color index (2)
44- 48 F5.3 mag m0 [0.09/0.3] Dereddeend m1, metal line index (2)
50- 54 F5.3 mag c0 [0.2/1.1] Dereddeend c1, Balmer discontinuity
index (2)
56- 60 F5.3 mag beta [2.6/3] Dereddened β index (2)
62- 66 I5 K Teff [6274/18927] Photometric effective
temperature (G1)
68- 70 I3 K e_Teff [100/840] Uncertainty in Teff (G1)
72- 76 F5.3 [cm/s2] log(g) [3.4/4.8] Photometric surface gravity (G1)
78- 82 F5.3 [cm/s2] e_log(g) [0.09/0.15] Uncertainty in log(g) (G1)
84- 87 I4 km/s vsini [0/380] Projected rotational velocity (1)
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Note (1): Selected from the WEBDA open cluster database:
http://www.univie.ac.at/webda/
Note (2): Dereddened indices calculated in this article.
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Global notes:
Note (G1): The atmospheric parameters presented here were derived
from photometry, then corrected for the effects of rotation using
the formulae of Figueras & Blasi (1998A&A...329..957F 1998A&A...329..957F).
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 02-Sep-2015