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Title:
Coronagraphic Search for Extrasolar Planets around ɛ Eri and Vega
Authors:
Itoh, Yoichi; Oasa, Yumiko; Fukagawa, Misato
Affiliation:
AA(Graduate School of Science and Technology, Kobe University, 1-1 Rokkodai, Nada, Kobe, Hyogo 657-8501, Japan; .), AB(Graduate School of Science and Technology, Kobe University, 1-1 Rokkodai, Nada, Kobe, Hyogo 657-8501, Japan; .), AC(Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan.)
Publication:
The Astrophysical Journal, Volume 652, Issue 2, pp. 1729-1733. (ApJ Homepage)
Publication Date:
12/2006
Origin:
UCP
ApJ Keywords:
Stars: Planetary Systems, stars: individual (ɛ Eri), Stars: Individual: Name: Vega, Techniques: High Anular Resolution
DOI:
10.1086/508420
Bibliographic Code:
2006ApJ...652.1729I

Abstract

We present the results of a coronagraphic imaging search for extrasolar planets around the young main-sequence stars ɛ Eri and Vega. Concentrating the stellar light into the core of the point-spread function by the adaptive optic system and blocking the core by the occulting mask in the coronagraph, we have achieved the highest sensitivity for point sources in close vicinity of the both central stars. Nonetheless, we had no secure detection of a point source around the stars. The observations give the upper limits on the masses of the planets to (4-6)MJ and (5-10)MJ at a few arcseconds from ɛ Eri and Vega, respectively. Diffuse structures are also not detected around both stars.

Based on data collected at the Subaru Telescope, which is operated by the National Astronomical Observatory of Japan.

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