| Full text | |
| Author(s): |
Oliveira, A. S.
[1]
;
Steiner, J. E.
[2]
;
Ricci, T. V.
[2]
;
Menezes, R. B.
[2]
;
Borges, B. W.
[2]
Total Authors: 5
|
| Affiliation: | [1] Univ Vale Paraiba, IP&D, BR-12244000 Sao Jose Dos Campos, SP - Brazil
[2] Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer, BR-05508900 Sao Paulo - Brazil
Total Affiliations: 2
|
| Document type: | Journal article |
| Source: | Astronomy & Astrophysics; v. 517, JUL 2010. |
| Web of Science Citations: | 1 |
| Abstract | |
Context. Close binary supersoft X-ray sources (CBSS) are binary systems that contain a white dwarf with stable nuclear burning on its surface. These sources, first discovered in the Magellanic Clouds, have high accretion rates and near-Eddington luminosities (10(37)-10(38) erg s(-1)) with high temperatures (T = 2-7 x 10(5) K). Aims. The total number of known objects in the MC is still small and, in our galaxy, even smaller. We observed the field of the unidentified transient supersoft X-ray source RX J0527.8-6954 in order to identify its optical counterpart. Methods. The observation was made with the IFU-GMOS on the Gemini South telescope with the purpose of identifying stars with possible He II or Balmer emission or else of observing nebular extended jets or ionization cones, features that may be expected in CBSS. Results. The X-ray source is identified with a B5e V star that is associated with subarcsecond extended H alpha emission, possibly bipolar. Conclusions. If the primary star is a white dwarf, as suggested by the supersoft X-ray spectrum, the expected orbital period exceeds 21 h; therefore, we believe that the 9.4 h period found so far is not associated to this system. (AU) | |
| FAPESP's process: | 08/06988-0 - Characterization and environment of low luminosity active nuclei |
| Grantee: | Tiago Vecchi Ricci |
| Support Opportunities: | Scholarships in Brazil - Doctorate |
| FAPESP's process: | 08/04530-6 - Multiple imaging in cataclysmic variable stars |
| Grantee: | Bernardo Walmott Borges |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 03/12618-7 - Structure and evolution of V Sagittae stars, CBSS and related objects |
| Grantee: | Alexandre Soares de Oliveira |
| Support Opportunities: | Scholarships abroad - Research |
| FAPESP's process: | 08/11087-1 - The nature of LINERs |
| Grantee: | Roberto Bertoldo Menezes |
| Support Opportunities: | Scholarships in Brazil - Doctorate |