Search for Exozodiacal Dust: Are Vega-like Stars Common ?

• HIRAO, Takanori

• MATSUO, Hiroshi

• MATSUURA, Shinji

• MURAKAMI, Hiroshi

• NODA, Manabu

• OOTSUBO, Takafumi

• UENO, Munetaka

Abstract

Possible observations of Vega-like stars by the ASTRO-F and the HII/L2 3.5m space telescope are proposed. Vega-like stars are main sequence stars with mid-infrared and/or far-infrared excess. A few of these stars have been observed precisely at various wavelengths and it was found out that they tend to have hot (～300K) circumstellar dust like the zodiacal dust in our solar system and warm (～50K) dust ring around 30{50 AU from the central star. In spite of thesediscoveries, one question still remains; How many Vega-like stars are there? Mid- and far-infrared surveys by the ASTRO-F and the HII/L2 telescope will be the best ones to get the answer to this question. The ASTRO-F/FIS survey could detect `α Lyr' located at a distance of <50pc, within which roughly 150 of A-type main sequence stars exist. The HII/L2 3.5m telescope survey has the capability to detect much farther, up to 100pc. Thus, the total number of candidates will increase to as many as ～1000.

資料番号: SA4585143000

Journal

• The Institute of Space and Astronautical Science report. S.P. : Mid- and Far-Infrared Astronomy and Future Space Mission

  The Institute of Space and Astronautical Science report. S.P. : Mid- and Far-Infrared Astronomy and Future Space Mission 14 19-25, 2000-12

  宇宙科学研究所

Details

• CRID: 1050003824963375616
• NII Article ID: 120006837955
• NII Book ID: AA10455137
• ISSN: 0288433X
• Web Site: http://id.nii.ac.jp/1696/00036647/
• Text Lang: en
• Article Type: departmental bulletin paper
• Data Source:
  • IRDB
  • CiNii Articles