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Forming the first planetary systems: debris around Galactic thick disc stars

Sheehan, C. K. W. and Greaves, J. S. and Bryden, G. and Rieke, G. H. and Su, K. Y. L. and Wyatt, M. C. and Beichman, C. A. (2010) Forming the first planetary systems: debris around Galactic thick disc stars. Monthly Notices of the Royal Astronomical Society: Letters, 408 (1). L90-L94. ISSN 1745-3933. https://resolver.caltech.edu/CaltechAUTHORS:20101110-110930649

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Abstract

The thick disc contains stars formed within the first Gyr of Galactic history, and little is known about their planetary systems. The Spitzer MIPS instrument was used to search 11 of the closest of these old low-metal stars for circumstellar debris, as a signpost that bodies at least as large as planetesimals were formed. A total of 22 thick disc stars has now been observed, after including archival data, but dust is not found in any of the systems. The data rule out a high incidence of debris among star systems from early in the Galaxy's formation. However, some stars of this very old population do host giant planets, at possibly more than the general incidence among low-metal Sun-like stars. As the Solar system contains gas giants but little cometary dust, the thick disc could host analogue systems that formed many Gyr before the Sun.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1111/j.1745-3933.2010.00936.xDOIArticle
ORCID:
AuthorORCID
Greaves, J. S.0000-0002-3133-413X
Rieke, G. H.0000-0003-2303-6519
Su, K. Y. L.0000-0002-3532-5580
Beichman, C. A.0000-0002-5627-5471
Additional Information:© 2010 The Authors. Journal compilation © 2010 RAS. Accepted 2010 August 18. Received 2010 August 13; in original form 2010 June 28. Article first published online: 7 Sep 2010. CKWS thanks STFC for a studentship, and JSG thanks STFC for a fellowship, in support of this work.
Group:Infrared Processing and Analysis Center (IPAC)
Funders:
Funding AgencyGrant Number
Science and Technology Facilities Council (STFC)UNSPECIFIED
Subject Keywords:planets and satellites: formation; circumstellar matter; infrared: stars
Issue or Number:1
Record Number:CaltechAUTHORS:20101110-110930649
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20101110-110930649
Official Citation:Sheehan, C. K. W., Greaves, J. S., Bryden, G., Rieke, G. H., Su, K. Y. L., Wyatt, M. C. and Beichman, C. A. (2010), Forming the first planetary systems: debris around Galactic thick disc stars. Monthly Notices of the Royal Astronomical Society: Letters, 408: L90–L94. doi: 10.1111/j.1745-3933.2010.00936.x
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:20744
Collection:CaltechAUTHORS
Deposited By: Jason Perez
Deposited On:11 Nov 2010 15:54
Last Modified:07 Apr 2020 17:38

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