The high-frequency QPOs in GRS 1915+105
We analyzed two 1996 observations of the Galactic Microquasar GRS 1915+105 taken with the Proportional Counter Array on board the Rossi X-ray Timing Explorer. We focus on the properties of the high-frequency QPO as a function of the "dip" oscillations, a factor of 1000 slower. In one obser...
Guardado en:
| Autores principales: | , , |
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| Formato: | Articulo |
| Lenguaje: | Inglés |
| Publicado: |
2001
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| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/84398 |
| Aporte de: |
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I19-R120-10915-84398 |
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| record_format |
dspace |
| institution |
Universidad Nacional de La Plata |
| institution_str |
I-19 |
| repository_str |
R-120 |
| collection |
SEDICI (UNLP) |
| language |
Inglés |
| topic |
Ciencias Astronómicas Accretion: accretion disks Black hole physics Stars: black hole candidates: oscillations X-rays: stars |
| spellingShingle |
Ciencias Astronómicas Accretion: accretion disks Black hole physics Stars: black hole candidates: oscillations X-rays: stars Belloni, T. Méndez, Mariano R. Sánchez Fernández, C. The high-frequency QPOs in GRS 1915+105 |
| topic_facet |
Ciencias Astronómicas Accretion: accretion disks Black hole physics Stars: black hole candidates: oscillations X-rays: stars |
| description |
We analyzed two 1996 observations of the Galactic Microquasar GRS 1915+105 taken with the Proportional Counter Array on board the Rossi X-ray Timing Explorer. We focus on the properties of the high-frequency QPO as a function of the "dip" oscillations, a factor of 1000 slower. In one observation, 1996 May 5th, we find that the energy spectrum of the QPO at ∼65 Hz changes drastically between the high-intervals and the dips, hardening during the dips to the point that the QPO peak is no longer detected at low energies. In the second observation, 1996 May 14th, although it has similar overall characteristics, the 65 Hz QPO is not seen, but another broader QPO peak appears at 27 Hz, only during the dips. This peak is too weak to obtain reliable information about its spectrum. Our results indicate that the presence/absence of high-frequency features in this enigmatic source are intimately linked to the slower oscillations and variations that happen on longer time scales. |
| format |
Articulo Articulo |
| author |
Belloni, T. Méndez, Mariano R. Sánchez Fernández, C. |
| author_facet |
Belloni, T. Méndez, Mariano R. Sánchez Fernández, C. |
| author_sort |
Belloni, T. |
| title |
The high-frequency QPOs in GRS 1915+105 |
| title_short |
The high-frequency QPOs in GRS 1915+105 |
| title_full |
The high-frequency QPOs in GRS 1915+105 |
| title_fullStr |
The high-frequency QPOs in GRS 1915+105 |
| title_full_unstemmed |
The high-frequency QPOs in GRS 1915+105 |
| title_sort |
high-frequency qpos in grs 1915+105 |
| publishDate |
2001 |
| url |
http://sedici.unlp.edu.ar/handle/10915/84398 |
| work_keys_str_mv |
AT bellonit thehighfrequencyqposingrs1915105 AT mendezmarianor thehighfrequencyqposingrs1915105 AT sanchezfernandezc thehighfrequencyqposingrs1915105 AT bellonit highfrequencyqposingrs1915105 AT mendezmarianor highfrequencyqposingrs1915105 AT sanchezfernandezc highfrequencyqposingrs1915105 |
| bdutipo_str |
Repositorios |
| _version_ |
1764820488681422851 |