Utilizza questo identificativo per citare o creare un link a questo documento:
http://hdl.handle.net/20.500.12386/32244
Titolo: | Disc versus wind accretion in X-ray pulsar GX 301-2 | Autori: | Liu, Jiren Ji, Long Jenke, Peter A. Doroshenko, Victor Liao, Zhenxuan Li, Xiaobo Zhang, Shuangnan ORLANDINI, MAURO Ge, Mingyu Zhang, Shu Santangelo, Andrea |
Data pubblicazione: | 2021 | Rivista: | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | Numero: | 504 | Fascicolo: | 2 | Da pagina:: | 2493 | Abstract: | GX 301-2 provides a rare opportunity to study both disc and wind accretion in a same target. We report Insight-Hard X-ray Modulation Telescope observations of the spin-up event of GX 301-2 that happened in 2019 and compare with those of wind-fed state. The pulse profiles of the initial rapid spin-up period are dominated by one main peak, while those of the later slow spin-up period are composed of two similar peaks, as those of wind-fed state. These behaviours are confirmed by Fermi/Gamma-ray Burst Monitor data, which also show that during the rapid spin-up period, the main peak increases with luminosity up to 8 × 10<SUP>37</SUP> erg s<SUP>-1</SUP>, but the faint peak remains almost constant. The absorption column densities during the spin-up period are ~1.5 × 10<SUP>23</SUP> cm<SUP>-2</SUP>, much less than those of wind-fed state at similar luminosity (~9 × 10<SUP>23</SUP> cm<SUP>-2</SUP>), supporting the scenario that most of material is condensed into a disc during the spin-up period. We discuss possible differences between disc and wind accretion that may explain the observed different trends of pulse profiles. | URI: | http://hdl.handle.net/20.500.12386/32244 | URL: | https://academic.oup.com/mnras/article/504/2/2493/6211000 | ISSN: | 0035-8711 | DOI: | 10.1093/mnras/stab938 | Bibcode ADS: | 2021MNRAS.504.2493L | Fulltext: | open |
È visualizzato nelle collezioni: | 1.01 Articoli in rivista |
File in questo documento:
File | Descrizione | Dimensioni | Formato | |
---|---|---|---|---|
stab938.pdf | PDF Editoriale | 1.91 MB | Adobe PDF | Visualizza/apri |
2103.16757.pdf | postprint | 1.54 MB | Adobe PDF | Visualizza/apri |
Page view(s)
33
controllato il 31-ago-2024
Download(s)
20
controllato il 31-ago-2024
Google ScholarTM
Check
Altmetric
Altmetric
Tutti i documenti in DSpace sono pubblicati ad Accesso Aperto, salvo diversa indicazione per alcuni documenti specifici.