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Direct imaging search for extrasolar planets in the pleiades
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Tanii, Ryoko Konishi, Mihokko Brandner, Wolfgang Abe, Lyn Brandt, Timothy D. Hashimoto, Jun Yamamoto, Kodai Matsuo, Taro Sumi, Takahiro Grady, Carol Egner, Sebastian E, Currie, Thayne Carson, Joseph Goto, Miwa Serabyn, Eugene Kudo, Tomoyuki McElwain, Mike Kusakabe, Nobuhiko Sudo, Jun Fukagawa, Misato Feldt Sr., Markus Hayano, Yutaka Shibai, Hiroshi Guyon, Olivier Itoh, Yoichi |
| Copyright Year | 2013 |
| Description | We carried out an imaging survey for extrasolar planets around stars in the Pleiades (125 Myr, 135 pc) in the H and K(sub S) bands using HiCIAO combined with adaptive optics, AO188, on the Subaru telescope. We found 13 companion candidates fainter than 14.5 mag in the H band around 9 stars. Five of these 13 were confirmed to be background stars by measurement of their proper motion. One was not found in the second epoch observation, and thus was not a background or companion object. One had multi-epoch images, but the precision of its proper motion was not sufficient to conclude whether it was a background object. Four other candidates are waiting for second-epoch observations to determine their proper motion. Finally, the remaining two were confirmed to be 60 M(sub J) brown dwarf companions orbiting around HD 23514 (G0) and HII 1348 (K5), respectively, as had been reported in previous studies. In our observations, the average detection limit for a point source was 20.3 mag in the H band beyond 1.â²â² 5 from the central star. On the basis of this detection limit, we calculated the detection efficiency to be 90% for a planet with 6 to 12 Jovian masses and a semi-major axis of 50â1000 AU. For this reason we extrapolated the distribution of the planet mass and the semi-major axis derived from radial velocity observations, and adopted the planet evolution model Baraffe et al. (2003, A&A, 402, 701). Since there was no detection of a planet, we estimated the frequency of such planets to be less than 17.9% (2 sigma) around one star of the Pleiades cluster. |
| File Size | 2370010 |
| Page Count | 30 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20140009144 |
| Archival Resource Key | ark:/13960/t29937b55 |
| Language | English |
| Publisher Date | 2013-06-13 |
| Access Restriction | Open |
| Subject Keyword | Extrasolar Planets Subaru Telescope Pleiades Pleiades Cluster Infrared Astronomy Infrared Telescopes Planetary Evolution Gas Giant Planets Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
