J/ApJ/734/70 Chromospheric activity of Southern stars (Arriagada, 2011)
Chromospheric activity of Southern stars from the Magellan Planet Search
Program.
Arriagada P.
<Astrophys. J., 734, 70 (2011)>
=2011ApJ...734...70A 2011ApJ...734...70A
ADC_Keywords: Spectroscopy ; Stars, late-type ; Stars, ages
Keywords: stars: activity - stars: chromospheres -
stars: fundamental parameters - stars: rotation
Abstract:
I present chromospheric-activity measurements of ∼670 F, G, K, and M
main-sequence stars in the Southern Hemisphere, from ∼8000 archival
high-resolution echelle spectra taken at Las Campanas Observatory
since 2004. These stars were targets from the Old Magellan Planet
Search, and are now potential targets for the New Magellan Planet
Search that will look for rocky and habitable planets. Activity
indices (S values) are derived from CaII H and K line cores and then
converted to the Mount Wilson system. From these measurements,
chromospheric (log R'HK) indices are derived, which are then used as
indicators of the level of radial-velocity jitter, age, and rotation
periods these stars present.
Description:
The Magellan Planet Search Program has been monitoring ∼690 stars
since late 2002. The observations have been done using the MIKE
echelle spectrograph mounted on the 6.5m Clay Telescope (Magellan II)
at Las Campanas Observatory. Using a 0.35arcsec slit, MIKE obtains
spectra with a resolution of R∼70000 in the blue and ∼50000 in the
red, covering the wavelength range from 3900 to 6200Å divided into
a red and a blue CCD.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 50 673 Derived S-values from MIKE spectra converted to
MW (Mount Wilson) system
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See also:
I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)
III/159 : Ca II H and K Measurements Made at MWO (Duncan+ 1991)
J/A+A/531/A8 : Activity indexes and vel. for 890 stars (Jenkins+, 2011)
J/A+A/520/A79 : FGK stars chromospheric activity (Martinez-Arnaiz+, 2010)
J/ApJ/725/875 : Chromospheric activity for CPS stars (Isaacson+, 2010)
J/ApJ/687/1264 : Age estimation for solar-type dwarfs (Mamajek+, 2008)
J/A+A/485/571 : Metallicities + activities of southern stars (Jenkins+, 2008)
J/MNRAS/372/163 : Activity indices for southern stars (Jenkins+, 2006)
J/AJ/132/161 : NStars project: The southern sample. I. (Gray+, 2006)
J/ApJS/152/261 : Chromospheric Ca II emission in nearby stars (Wright+, 2004)
J/MNRAS/298/332 : Chromospheric activity-age relation (Rocha-Pinto+ 1998)
J/AJ/111/439 : Chromospheric emission in late-type stars. (Henry+ 1996)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Name Source name or HD identification number
12- 16 F5.3 mag B-V The (B-V) color index
18- 20 I3 --- Nobs Number of observations
22- 26 F5.3 --- S The SMIKE chromospheric activity index,
converted to the Mount Wilson (MW) system
28- 32 F5.2 [-] logRHK ? The logR'HK chromospheric index
34- 35 I2 d Prot ? Rotation period
37- 41 F5.2 [yr] logA ? Log of the age
43- 45 F3.1 m/s sRV1 Estimated stellar jitter σ'RV from
Isaacson & Fischer 2010, Cat. J/ApJ/725/875
47- 50 F4.1 m/s sRV2 Estimated stellar jitter σ'RV from
Wright (2005PASP..117..657W 2005PASP..117..657W)
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 26-Nov-2012