J/A+A/551/L8 Chromospheric activity of field stars (Pace, 2013)
Chromospheric activity as age indicator.
Pace G.
<Astron. Astrophys. 551, L8 (2013)>
=2013A&A...551L...8P 2013A&A...551L...8P
ADC_Keywords: Stars, nearby ; Stars, dwarfs ; Stars, ages ; Combined data
Keywords: Stars: activity
Description:
Compilation of S-index measurements available in the literature
cross-correlated with the CDS catalog. The S-index is a measure of
the strength of the chromospheric emission in the core of the CaII H
and K lines, and it is a proxy for chromospheric activity. Its
conversion into logR'HK is also reported, along with temperature, age
and metallicity from the CDS.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
cacomp.dat 134 2085 Ca measurements and parameters
sindices.dat 108 7864 All S-index ranges collected in the literature
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See also:
V/130 : Geneva-Copenhagen Survey of Solar neighbourhood III (Holmberg+, 2009)
III/135 : Henry Draper Catalog & Extension (Cannon+ 1918-24, ADC 1989)
I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)
J/MNRAS/298/332 : Chromospheric activity-age relation (Rocha-Pinto+ 1998)
J/A+A/520/A79 : FGK stars chromospheric activity (Martinez-Arnaiz+, 2010)
J/A+A/530/A138 : Geneva-Copenhagen survey re-analysis (Casagrande+, 2011)
J/A+A/531/A8 : Activity indexes and velocities for 890 stars (Jenkins+ 2011)
J/A+A/469/309 : Chromospheric activity in late-type stars (Cincunegui+, 2007)
J/ApJ/725/875 : Chromospheric activity for CPS stars (Isaacson+, 2010)
J/ApJ/734/70 : Chromospheric activity of Southern stars (Arriagada, 2011)
Byte-by-byte Description of file: cacomp.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- --- [HD Sun]
4- 9 I6 --- HD ? HD number of the star (Cat. III/135)
11- 12 I2 h RAh ? Right Ascension J2000 (hours)
14- 15 I2 min RAm ? Right Ascension J2000 (minutes)
17- 20 F4.1 s RAs [0/60]? Right Ascension J2000 (seconds)
22 A1 --- DE- Declination J2000 (sign)
23- 24 I2 deg DEd ? Declination J2000 (degrees)
26- 27 I2 arcmin DEm ? Declination J2000 (minutes)
29- 30 I2 arcsec DEs [0/60]? Declination J2000 (seconds)
32- 36 F5.3 0.1nm Smin ? Lowest measured S-index value
40- 44 F5.3 0.1nm Smax ? Highest measured S-index value
48- 52 F5.3 0.1nm SMW ? S-index mean value for a full cycle (1)
56- 61 F6.3 [-] logRmin Conversion of Smin into logR'HK (2)
66- 71 F6.3 [-] logRmax Conversion of Smax into logR'HK (2)
76- 81 F6.3 [-] logRMW ? Conversion of SMW into logR'HK (2)
84- 88 F5.2 Gyr Age Age estimation from GCS (3)
93- 96 F4.2 Gyr e_Age ? From the GCS. 2σ error on the Age (3)
101-104 I4 K Teff Effective temperature from GCS (3)
108-112 F5.2 [Sun] [Fe/H] Metallicity from GCS (3)
116-134 A19 --- Ref References for the S-index measurements (G1)
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Note (1): SMW is either from Lockwood et al (2007ApJS..171..260L 2007ApJS..171..260L) or
Baliunas et al. (1995ApJ...438..269B 1995ApJ...438..269B). When both are available,
the former is used.
Note (2): The conversion of the S-index into logR'HK (2) is made
following Noyes et al. (1984ApJ...279..763N 1984ApJ...279..763N): conversion into flux,
subtraction of the photospheric contribution, division by the
bolometric flux. The B-V value used is obtained from the effective
temperature by reverting the calibration of Casagrande et al.
(2010A&A...512A..54C 2010A&A...512A..54C). Only for the Sun, the logR'HK values are
taken directly from Mamajek and Hillenbrand (2008ApJ...687.1264M 2008ApJ...687.1264M).
Note (3): The Geneva-Copenhague Survey (GCS) version used here is that of
Casagrande et al. (2011A&A...530A.138C 2011A&A...530A.138C, see also Cat. V/130). The
adopted ages are the BASTI expectation ages, and the 2σ error on
their value is the difference between the 84% and the 16% value (see
appendix A therein in Casagrande et al., 2010A&A...512A..54C 2010A&A...512A..54C)
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Byte-by-byte Description of file: sindices.dat
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Bytes Format Units Label Explanations
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1- 20 A20 --- Name Name of the star
22- 23 I2 h RAh Right Ascension J2000 (hours)
25- 26 I2 min RAm Right Ascension J2000 (minutes)
28- 35 F8.5 s RAs [0/60] Right Ascension J2000 (seconds)
39 A1 --- DE- Declination J2000 (sign)
40- 41 I2 deg DEd Declination J2000 (degrees)
43- 44 I2 arcmin DEm Declination J2000 (minutes)
46- 52 F7.4 arcsec DEs [0/60] Declination J2000 (seconds)
55- 60 F6.3 0.1nm Smin Lowest measured S-index value.
63- 68 F6.3 0.1nm Smax Highest measured S-index value.
72- 90 A19 --- Ref References for the S-index measurements (G1)
94- 98 F5.3 0.1nm S1 ? S-index mean value for a full cycle from
Baliunas et al. (1995ApJ...438..269B 1995ApJ...438..269B)
104-108 F5.3 0.1nm S2 ? S-index mean value for a full cycle from
Lockwood et al. (2007ApJS..171..260L 2007ApJS..171..260L)
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Global notes:
Note (G1): Each character refers to the corresponding study in the list below.
Characters repeated twice refer to studies with multiple measurements.
1 = Arriagada et al. (2011ApJ...734...70A 2011ApJ...734...70A)
2 = Baliunas et al. (1995ApJ...438..269B 1995ApJ...438..269B)
3 = Buccino et al. (2008, Cat. J/A+A/483/903)
4 = Cincunegui et al. (2007, Cat. J/A+A/469/309)
5 = Duncan et al. (1991ApJS...76..383D 1991ApJS...76..383D, Cat. III/159)
6 = Gray et al. (2003, Cat. J/AJ/126/2048)
7 = Gray et al. (2006, Cat. J/AJ/132/161)
8 = Hall et al. (2007AJ....133.2206H 2007AJ....133.2206H)
9 = Henry et al. (1996, cat. J/AJ/111/439)
a = Isaacson and Fischer (2010, Cat. J/ApJ/725/875)
b = Jenkins et al. (2011, Cat. J/A+A/531/A8)
c = Knutson et al. (2010ApJ....720.1569K)
d = Lockwood et al. (2007ApJS..171..260L 2007ApJS..171..260L)
e = Lopez-Santiago et al. (2010A&A...514A..97L 2010A&A...514A..97L)
f = Schroder et al. (2009, Cat. J/A+A/493/1099)
g = Strassmeier et al. (2000, Cat. J/A+AS/142/275)
h = Tinney et al. (2002MNRAS.332..759T 2002MNRAS.332..759T)
i = White et al. (2007, Cat. J/AJ/133/2524)
j = Wright et al. (2004, Cat. J/ApJS/152/261)
k = Mamajek & Hillenbrand (2008, Cat. J/ApJ/687/1264)
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History:
* 22-Feb-2013: on-line version
* 13-Jun-2013: table cacomp corrected, and sindices added, from author
* 16-Sep-2013: actualised version of cacomp, from author
Acknowledgements:
Giancarlo Pace, gpace (at)astro.up.pt
(End) Giancarlo Pace [CAUP, Portugal], Patricia Vannier [CDS] 08-Feb-2013