J/AJ/143/135 Ages of A-K type stars in DEBRIS survey (Vican, 2012)
Age determination for 346 nearby stars in the Herschel DEBRIS survey.
Vican L.
<Astron. J., 143, 135 (2012)>
=2012AJ....143..135V 2012AJ....143..135V
ADC_Keywords: Stars, nearby ; Stars, ages ; Stars, A-type ; Stars, F-type ;
Stars, G-type ; Stars, K-type
Keywords: stars: activity - stars: evolution - stars: rotation
Abstract:
DEBRIS is a flux-limited survey of nearby stars (spectral types A-M)
for evidence of debris disks with the Herschel Space Observatory. One
goal of the survey is to determine disk incidence as a function of
various stellar parameters. Understanding debris disk evolution
depends on knowledge of the precise age of stars around which these
debris disks are found. However, finding ages for field stars is
notoriously difficult. Furthermore, in an unbiased sample like DEBRIS,
one is working with stars across many spectral types. This requires a
multi-method approach to age determination. In this paper, we outline
several methods of age determination broken down by spectral type,
including some strengths and limitations of each method. In total, we
were able to calculate ages for 263 of 274 F-, G-, and K-type stars,
and all 83 A-type stars in the DEBRIS sample.
Description:
The DEBRIS (Disk Emission via a Bias-free Reconnaissance in the
Infrared/Submillimeter) is a Herschel Key Program (PI: Matthews) using
the Herschel Space Observatory.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 27 35 DEBRIS stars with gyrochronology ages
table2.dat 67 263 DEBRIS stars with activity ages
table3.dat 19 82 DEBRIS A star ages
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See also:
IX/10 : ROSAT All-Sky Bright Source Catalogue (1RXS) (Voges+ 1999)
I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)
III/159 : CaII H and K Measurements Made at MWO (Duncan+ 1991)
J/ApJ/756/133 : ScoCen debris disks around B- and A-type stars (Chen+, 2012)
J/ApJ/743/48 : Stellar rotation periods & Xray luminosities (Wright+, 2011)
J/ApJ/738/122 : ScoCen debris disks Around F- and G-type stars (Chen+, 2011)
J/MNRAS/403/1089 : SUNS and DEBRIS surveys target selection (Phillips+, 2010)
J/A+A/493/1099 : Ca2 HK emission in rapidly rotating stars (Schroeder+, 2009)
J/MNRAS/387/105 : Isochrone database for single & binary-star SSPs (Li+, 2008)
J/ApJ/687/1264 : Age estimation for solar-type dwarfs (Mamajek+, 2008)
J/ApJ/660/1556 : Characterization of dusty debris disks (Rhee+, 2007)
J/PASJ/59/335 : Properties of 160 F-K disk dwarfs/subgiants (Takeda+, 2007)
J/AJ/132/161 : NStars project: The southern sample. I. (Gray+, 2006)
J/ApJ/636/1098 : Debris disks around solar-type stars (Bryden+, 2006)
J/ApJ/620/1010 : Spitzer 24{micro}m photometry of A dwarfs (Rieke+, 2005)
J/ApJS/159/141 : Spectroscopic properties of cool stars. I. (Valenti+, 2005)
J/ApJS/152/261 : Chromospheric Ca II emission in nearby stars (Wright+, 2004)
J/other/ARA+A/42.685 : Young stars near the Sun (Zuckerman+, 2004)
J/AJ/126/2048 : NStars project: the Northern Sample. I. (Gray+, 2003)
J/AJ/111/439 : Chromospheric emission in late-type stars. (Henry+ 1996)
J/A+A/177/131 : Ca2 and Mg2 excess flux density in cool stars (Rutten, 1987)
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 Hipparcos identifier (from Cat. I/239)
8- 11 F4.2 Gyr Age Gyrochronology age
13- 17 F5.2 d Prot Rotation period
19- 21 A3 --- r_Prot Reference for the rotation period (1)
23- 27 F5.3 mag B-V The Hipparcos B-V color index
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Note (1): Reference as follows:
B83 = Baliunas et al. (1983ApJ...275..752B 1983ApJ...275..752B);
B96 = Baliunas et al. (1996ApJ...457L..99B 1996ApJ...457L..99B);
D96 = Donahue et al. (1996ApJ...466..384D 1996ApJ...466..384D);
W11 = Wright et al. (2011, Cat. J/ApJ/743/48).
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- HIP ? Hipparcos identifier (from Cat. I/239)
8- 16 A9 --- OName Other name
18- 22 F5.3 mag B-V The Hipparcos (B-V) color index
24- 29 F6.3 [-] log(RHK) ? Chromospheric heating parameter
31- 33 A3 --- r_log(RHK) Reference for log(RHK) (1)
35- 39 F5.2 [-] logRx ? Ratio of X-ray to bolometric luminosities
RX = LX/Lbol
41- 46 F6.2 km/s vsini ? Projected rotational velocity
48- 53 F6.3 Gyr Age.R [0.001/11.2]? Chromospheric heating derived
age (2)
54 A1 --- f_Age.R [b] Gyrochronology age preferred (3)
56- 59 F4.2 Gyr Age.X [0.06/4.99]? X-ray derived age (4)
60 A1 --- f_Age.X [a] Discrepent ages (3)
62- 67 F6.2 Gyr Age.v [0.1/134]? Vsin(i) derived age
(see section 2.1.1.)
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Note (1): Reference as follows:
D91 = Duncan (1991, Cat. III/159);
M10 = Maldonado et al. (2011JPhCS.328a2011M 2011JPhCS.328a2011M);
G06 = Gray et al. (2006, Cat. J/AJ/132/161);
G03 = Gray et al. (2003, Cat. J/AJ/126/2048);
W04 = Wright et al. (2004, Cat. J/ApJS/152/261);
H96 = Henry et al. (1996, Cat. J/AJ/111/439);
S85 = Soderblom et al. (1985AJ.....90.2103S 1985AJ.....90.2103S);
S09 = Schroeder et al. (2009, Cat. J/A+A/493/1099).
Note (2): Computed using the following formula from
Mamajek & Hillenbrand (2008, Cat. J/ApJ/687/1264):
log(t)=-38.05-(17.91*log(R'HK))-(1.67*log(R'HK)2)
(see equation (2) in the paper).
Note (3): Flag in age as follows:
a = There is a large discrepancy between X-ray age and chromospheric age;
these stars are discussed in detail in the text (see Section 2.6).
b = Gyrochronology age (preferred to chromospheric and X-ray age) is listed
in Table 1.
Note (4): Derived from Mamajek & Hillenbrand (2008, Cat. J/ApJ/687/1264)
equation (see equation (5) in the paper):
log(t)=1.20-(2.307*logRx)-0.1512*(logRx)2
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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 Hipparcos identifier (from Cat. I/239) (1)
8- 12 F5.3 Gyr Age [0.01/0.81] Isochrone age
14- 19 A6 --- r_Age Source of the isochrone (2)
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Note (1): DEBRIS star HIP 88726 (not included in this table) is a member of the
β Pic moving group and thus is ∼12Myr old
(according to Zuckerman & Song, 2004, Cat. J/other/ARA+A/42.685).
Note (2): Isochrone source as follows:
R05 = Rieke et al. (2005, Cat. J/ApJ/620/1010);
YREC = YREC set of isochrones (Pinsonneault et al., 2004ApJ...600..946P 2004ApJ...600..946P);
Li-Han = Set of isochrones from Li & Han (2008, Cat. J/MNRAS/387/105).
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History:
* 08-Jul-2013: From electronic version of the journal
* 14-Aug-2013: typo in table2 fixed: star having HIP=562452 is HIP 56452.
(End) Greg Schwarz [AAS], Sylvain Guehenneux [CDS] 08-Jul-2013