2008ApJ...672..553L

Query : 2008ApJ...672..553L

2008ApJ...672..553L - Astrophys. J., 672, 553-557 (2008/January-1)

A substellar companion to the intermediate-mass giant 11 Comae.

LIU Y.-J., SATO B., ZHAO G., NOGUCHI K., WANG H., KAMBE E., ANDO H., IZUMIURA H., CHEN Y.-Q., OKADA N., TOYOTA E., OMIYA M., MASUDA S., TAKEDA Y., MURATA D., ITOH Y., YOSHIDA M., KOKUBO E. and IDA S.

Abstract (from CDS):

We report the detection of a substellar companion orbiting the intermediate-mass giant star 11 Com (G8 III). Precise Doppler measurements of the star from Xinglong Station and Okayama Astrophysical Observatory (OAO) reveal Keplerian velocity variations with an orbital period of 326.03±0.32 days, a semiamplitude of 302.8±2.6 m/s, and an eccentricity of 0.231±0.005. Adopting a stellar mass of 2.7±0.3 M☉, the minimum mass of the companion is 19.4±1.5 MJ, well above the deuterium-burning limit, and the semimajor axis is 1.29±0.05 AU. This is the first result from a joint planet-search program between China and Japan aimed at revealing the statistics of substellar companions around intermediate-mass giants. 11 Com b emerged from 300 targets of the planet-search program at OAO. The program's current detection rate of brown dwarf candidates seems to be comparable to the rate of such detections around solar-type stars with orbital separations of ≲3 AU.

Abstract Copyright: ∼

Journal keyword(s): Stars: Planetary Systems - stars: individual (11 Comae) - stars: individual ( HD 107383) - Stars: Low-Mass, Brown Dwarfs - Techniques: Radial Velocities

Simbad objects: 14

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Number of rows : 14
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 HD 13189b Pl 02 09 40.1723129208 +32 18 59.160568824           ~ 23 1
2 HD 17092b Pl 02 46 22.1182598088 +49 39 11.095466760           ~ 15 1
3 * gam Tau ** 04 19 47.6039239005 +15 37 39.511385129 5.46 4.64 3.65 4.83   G9.5IIIabCN0.5 552 0
4 BD-13 2130b Pl 07 37 09.2332503816 -13 54 23.956897032           ~ 21 1
5 NGC 2423 OpC 07 37 11.8 -13 51 47           ~ 150 0
6 * 11 Com b Pl 12 20 43.0257695904 +17 47 34.327512348           ~ 21 1
7 * 11 Com PM* 12 20 43.0257695904 +17 47 34.327512348   5.74 4.74     G8+IIIFe-1 164 1
8 NGC 4349 OpC 12 24 11.5 -61 51 58   8.01 7.4     ~ 114 0
9 NGC 4349 127b Pl 12 24 35.4709473000 -61 49 11.861413644           ~ 19 1
10 HD 120048 PM* 13 46 19.0616824776 +38 30 13.044486168   6.868 5.919     G9III 54 0
11 NAME Upper Sco-Cen As* 16 15 -24.2           ~ 1336 1
12 HD 176598 * 18 56 25.7183401176 +65 15 29.104305408   6.565 5.621     G8III 58 0
13 * 59 Dra b Pl? 19 09 09.8814606288 +76 33 37.813819608           ~ 7 0
14 * 59 Dra PM* 19 09 09.8814606288 +76 33 37.813819608   5.400 5.107     A7V 128 1

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