Hubble Space TelescopeDiscovery of an Optical Counterpart to the Supersoft X‐Ray Source in the Globular Cluster M3
| Autor: | Craig O. Heinke, P. Kahabka, Peter D. Edmonds |
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| Rok vydání: | 2004 |
| Předmět: |
Physics
Accretion (meteorology) Subgiant Astrophysics::High Energy Astrophysical Phenomena X-ray Binary number Astronomy and Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics Luminosity Accretion disc Space and Planetary Science Globular cluster Magnitude (astronomy) Astrophysics::Solar and Stellar Astrophysics Astrophysics::Earth and Planetary Astrophysics Astrophysics::Galaxy Astrophysics |
| Zdroj: | The Astrophysical Journal. 611:413-417 |
| ISSN: | 1538-4357 0004-637X |
| Popis: | We report the detection, with HST, of an optical counterpart to the transient supersoft X-ray source 1E 1339.8+2837, in the globular cluster M3. The counterpart is found near the faint end of the subgiant branch in the V vs V-I color magnitude diagram, but is extremely bright in U. Variability is detected over a range of timescales suggesting the presence of an accretion disk and perhaps also ellipsoidal variations of the subgiant secondary. The optical colors of the binary are similar to those of cataclysmic variables recently discovered in 47 Tucanae and NGC 6397. We suggest that magnetically channeled accretion may explain the relatively low X-ray luminosity of this source's supersoft state. |
| Databáze: | OpenAIRE |
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