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Detection of a High-Temperature Blackbody Hump in Black Hole Spectra. The strongly redshifted annihilation lineстатья
Статья опубликована в высокорейтинговом журнале
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Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 9 апреля 2021 г.
- Авторы: Titarchuk L., Seifina E.
- Журнал: Monthly Notices of the Royal Astronomical Society
- Том: 501
- Номер: 4
- Год издания: 2021
- Издательство: Oxford Journals, Oxford University Press
- Местоположение издательства: Oxford, UK, England
- Первая страница: 5659
- Последняя страница: 5678
- DOI: 10.1093/mnras/staa3961
- Аннотация: We detect a so called high-temperature blackbody (HBB) component, found in the 15–40 keV range, in the broad-band X-ray energy spectra of black hole (BH) candidate sources. A detailed study of this spectral feature is presented using data from five of the Galactic BH binaries, Cyg X–1, GX 339–4, GRS 1915+105, SS 433 and V4641 Sgr in the low/hard, intermediate and high/soft spectral states (LHS, IS and HSS, respectively) using RXTE, INTEGRAL and BeppoSAX data. In order to fit the broad-band energy spectra of these sources we used an additive XSPEC model, composed of the Comptonization component and the iron line (Gaussian) component. In particular, we reveal that the IS spectra have the HBB component which color temperature, kT_HBB is in the range of 4.5–5.9 keV. This HBB feature has been detected in some spectra of these sources only in the IS (for the photon index Γ>1.9) using different X-ray telescopes. We also demonstrate that a time-scale of the HBB-feature is of orders of magnitude shorter than the time-scale of the iron line and its edge. That leads us to conclude that these spectral features are formed in geometrically different parts of the source and which are not connected to each other. Laurent & Titarchuk (2018) demonstrated a presence of a gravitational redshifted annihilation line emission in a BH using the Monte-Carlo simulations and therefore the observed HBB hump leads us to suggest this feature is a gravitational redshifted annihilation line observed in these black holes.
- Добавил в систему: Сейфина Елена Викторовна
Прикрепленные файлы
| № | Имя | Описание | Имя файла | Размер | Добавлен |
|---|---|---|---|---|---|
| 1. | Полный текст | 2012.10645.pdf | 1,4 МБ | 22 декабря 2020 [seif11] |