|
| | | | |
| | | |
| Stat |
Members: 3645
Articles: 2'504'585
Articles rated: 2609
24 April 2024 |
|
| | | | |
|
Article overview
| |
|
|
Modeling the hard states of XTE J1550--564 during its 2000 outburst | | Feng Yuan
; Andrzej A. Zdziarski
; Yongquan Xue
; Xue-Bing Wu
; | | Date: |
25 Aug 2006 | | Abstract: | We study hard states of the black-hole binary XTE J1550--564 during its 2000 outburst. In order to explain those states at their highest luminosities, $Lsim 10%$ of the Eddington luminosity, $L_{
m E}$, we propose a specific hot accretion flow model. We point out that $L$ is substantially more than an advection-dominated accretion flow (ADAF) can produce, $sim 0.4alpha^2 L_{
m E}$, which is only $sim (3$--$4)%L_{
m E}$ even for $alpha$ as high as 0.3. On the other hand, we successfully explain the hard states with $Lsimeq (4$--$10)%$ using the luminous hot accretion flow (LHAF) model. As $10%L_{
m E}$ is also roughly the highest luminosity an LHAF can produce, such an agreement between the predicted and observed highest luminosities provides by itself strong support for this model. Then, we study multi-waveband spectral variability during the 2000 outburst. In addition to the primary maxima in the optical light curves, secondary maxima were detected after the transition from the very high state to the hard state. We show that the secondary maxima are well modeled by synchrotron emission from a jet formed during the state transition. We argue that the absence of the corresponding secondary peak in the X-ray light curve indicates that the X-ray jet emission, regardless of its radiative process, synchrotron or its Comptonization, is not important in the hard state compared to the emission from the accretion flow. | | Source: | arXiv, astro-ph/0608552 | | Services: | Forum | Review | PDF | Favorites | |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
|
| |
|
|
|
|
News, job offers and information for researchers and scientists:
| |
REGISTER