| Autor: |
Impey, C. D., Bothun, G. D. |
| Rok vydání: |
1988 |
| Předmět: |
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| Zdroj: |
Steward Observatory Parker Library SO QB 4 .S752 ARCH |
| Druh dokumentu: |
Článek |
| Popis: |
A study of the Galactic Center stellar population is continuing with a sensitive 2μm CCD camera. Using a 64 x 64 detector array, background limited images are recorded with modest amounts of observing time (tob, 20 sec to reach K =13). Magnitudes have been extracted using DAOPHOT from repeated imaging of the central 5' x 5' to search among approximately 1500 stars for long period variables (LPV's, P > 200d), particularily Miras. Miras have a well defined period - luminosity relationship as well as one in period -mass. This program investigates the nature of highly luminous stars at the Galactic Center. Presently 12 variables have been found and have several characteristics consistant with Miras. They have a maximum bolometric luminosity of -4.4 mag which supports the case that high luminosity stars in the central 6 pc are young supergiants. |
| Databáze: |
Networked Digital Library of Theses & Dissertations |
| Externí odkaz: |
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