A Bcool spectropolarimetric survey of over 150 solar-type stars

Marsden, Stephen and Petit, Pascal and Jeffers, Sandra and do Nascimento, Jose-Dias and Carter, Bradley and Brown, Carolyn (2014) A Bcool spectropolarimetric survey of over 150 solar-type stars. In: International Astronomical Union Symposium No. 302 (IAU 302): Magnetic Fields throughout Stellar Evolution, 25-30 Aug 2013 , Biarritz, France.

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Abstract

As part of the Bcool project, over 150 solar-type stars chosen mainly from planet search databases have been observed between 2006 and 2013 using the NARVAL and ESPaDOnS
spectropolarimeters on the Telescope Bernard Lyot (Pic duMidi, France) and the Canada France Hawaii Telescope (Mauna Kea, USA), respectively. These single 'snapshot' observations have been used to detect the presence of magnetic fields on 40% of our sample, with the highest
detection rates occurring for the youngest stars. From our observations we have determined the mean surface longitudinal field (or an upper limit for stars without detections) and the chromospheric surface fluxes, and find that the upper envelope of the absolute value of the mean surface longitudinal field is directly correlated to the chromospheric emission from the star and increases with rotation rate and decreases with age.


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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: Yes
Item Status: Live Archive
Additional Information: © 2014 International Astronomical Union. Permanent restricted access to published version due to publisher copyright policy.
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Agricultural, Computational and Environmental Sciences
Date Deposited: 04 Jun 2014 06:25
Last Modified: 11 Apr 2017 05:09
Uncontrolled Keywords: profiles; magnetic fields
Fields of Research : 02 Physical Sciences > 0201 Astronomical and Space Sciences > 020110 Stellar Astronomy and Planetary Systems
02 Physical Sciences > 0201 Astronomical and Space Sciences > 020102 Astronomical and Space Instrumentation
02 Physical Sciences > 0205 Optical Physics > 020503 Nonlinear Optics and Spectroscopy
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970102 Expanding Knowledge in the Physical Sciences
Identification Number or DOI: 10.1017/S1743921314001896
URI: http://eprints.usq.edu.au/id/eprint/24507

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