Search for Exozodiacal Dust: Are Vega-like Stars Common ?
| Autor: | HIRAO, Takanori, MATSUO, Hiroshi, MATSUURA, Shinji, MURAKAMI, Hiroshi, NODA, Manabu, OOTSUBO, Takafumi, UENO, Munetaka |
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| Jazyk: | angličtina |
| Rok vydání: | 2000 |
| Zdroj: | The Institute of Space and Astronautical Science report. S.P. : Mid- and Far-Infrared Astronomy and Future Space Mission. 14:19-25 |
| ISSN: | 0288-433X |
| Popis: | 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 資料番号: SA4585143000 |
| Databáze: | OpenAIRE |
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