J/MNRAS/372/163 Activity indices for southern stars (Jenkins+, 2006)
An activity catalogue of southern stars.
Jenkins J.S., Jones H.R.A., Tinney C.G., Butler R.P., McCarthy C.,
Marcy G.W., Pinfield D.J., Carter B.D., Penny A.J.
<Mon. Not. R. Astron. Soc., 372, 163-173 (2006)>
=2006MNRAS.372..163J 2006MNRAS.372..163J
ADC_Keywords: Stars, nearby ; Stars, atmospheres ; Stars, dwarfs
Keywords: stars: activity - stars: low-mass, brown dwarfs - planetary systems -
ultraviolet: stars
Abstract:
We have acquired high-resolution echelle spectra of 225 F6-M5 type
stars in the Southern hemisphere. The stars are targets or candidates
to be targets for the Anglo-Australian Planet Search. CaII H&K line
cores were used to derive activity indices for all of these objects.
The indices were converted to the Mt. Wilson system of measurements
and logR'HK values determined. A number of these stars had no
previously derived activity indices. In addition, we have also
included the stars from Tinney et al. (2002MNRAS.332..759T 2002MNRAS.332..759T) using our
Mt. Wilson calibration. The radial-velocity instability (also known as
jitter) level was determined for all 21 planet-host stars in our data
set. We find the jitter to be at a level considerably below the
radial-velocity signatures in all but one of these systems. 19 stars
from our sample were found to be active (logR'HK>-4.5) and thus
have high levels of jitter. Radial-velocity analysis for planetary
companions to these stars should proceed with caution.
Description:
Six nights of observations were taken over a period of 4yr. The
observations were made using the University College London Echelle
Spectrograph mounted on the 3.9-m Anglo-Australian Telescope (AAT).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 67 266 SAAT and logR'(HK,AAT) for stars on or under
consideration for the AAPS
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See also:
V/76 : Chromospherically Active Binaries (Strassmeier+ 1993)
J/A+A/312/221 : Excess CaII H+K emission in active binaries (Montes+, 1996)
J/AJ/111/439 : Chromospheric emission in late-type stars. (Henry+ 1996)
J/ApJS/152/261 : Chromospheric Ca II emission in nearby stars (Wright+, 2004)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 10 A10 "YYYY/MM/DD" Date Observation date
11 A1 --- --- [-]
12- 13 I2 --- n_Date ? Second day of observation
15 A1 --- n_Star [*] *: highlight planet bearing stars
16- 24 A9 --- Star Star name (GL or HD)
25 A1 --- m_Star [AB] Multiplicity index on Star
26- 31 F6.3 mag B-V Johnson B-V colour index (from HIP)
33- 37 F5.2 mag Vmag Johnson V magnitude (from HIP)
39- 47 A9 --- SpType MK spectral type
50- 55 F6.3 --- SAAT AAT activity index after calibration on to
the MW system of measurements (1)
57- 61 F5.3 --- e_SAAT rms uncertainty on SAAT (2)
63- 67 F5.2 --- logR'HK AAT final activity index derived from the
Ca II H+K lines (3)
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Note (1): For objects with multiple measurements, we have included all
the individual indices.
Note (2): The photon-counting errors are indicative only, a random error
of >3% must be taken into account in all instances. This error
was estimated from measurements of tau Ceti
Note (3): Final activity values generated following the Noyes et al.
(1984ApJ...279..763N 1984ApJ...279..763N) methodology.
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 29-May-2007