| タイトル | Search for Vega-like nearby stars with 12 micron excess |
| 著者（英） | Probst, Ronald G.; Aumann, Hartmut H. |
| 著者所属（英） | Kitt Peak National Observatory|Jet Propulsion Lab., California Inst. of Tech. |
| 発行日 | 1991-02-10 |
| 言語 | eng |
| 内容記述 | The identification of Vega-like main-sequence stars with 10-micron excess would permit important measurements of the spatial extent of the radiating material with ground-based telescopes. In fact, 55 of the 548 nearby A, F, G, and K dwarfs with IRAS catalog magnitudes at 12 microns appear to have excess 12-micron flux. However, for only two of these stars, Beta Pic and Zeta Lep, was it possible, using small-aperture photometry at 2.2 and 10 microns, to verify that the 12-micron excess is with high likelihood associated with the star. For the remaining stars the apparent 12-micron color of the 106 A, F, G, and K stars in the observing program is only 0.02 mag. Excess flux due to a Vega-like cloud which may surround some of the sources in the observing program, like Alpha Lyrae, is thus typically not detectable at 10 microns. |
| NASA分類 | ASTRONOMY |
| レポートNO | 91A25377 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/350132 |
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