Please use this identifier to cite or link to this item: https://ir.swu.ac.th/jspui/handle/123456789/12214
ชื่อเรื่อง: Thai national telescope studies of ultraluminous X-ray sources
ผู้แต่ง: Thongpoyai K.
Luangtip W.
Sawangwit U.
Roberts T.P.
Komonjinda S.
Dhillon V.S.
Marsh T.R.
Keywords: Beryllium compounds
Electron sources
Telescopes
X ray apparatus
Extra-galactic
Light curves
Nuclear sources
Stellar mass
Ultraluminous x-ray sources
X-ray luminosity
X rays
วันที่เผยแพร่: 2019
บทคัดย่อ: Ultraluminous X-ray sources (ULXs) are extra-galactic, non-nuclear sources with X-ray luminosity in excess of 1039 erg s-1. It has been thought that the majority of ULX populations are stellar-mass objects accreting matter at a super-Eddington rate. Although ULX studies are often focused in the X-ray regime, this work studied the ULXs in the optical regime, identified as the ULX counterparts (CTPs). The optical variability of nine CTPs were observed using the 2.4-m Thai National Telescope. Out of the nine ULXs, we detected three ULXs exhibiting strong variability up to ∼1 magnitude, suggesting that the CTP light does not come from the donor star's emission. The paper discusses the physical origins of the variability which potentially explain the observed light curves. © Published under licence by IOP Publishing Ltd.
URI: https://ir.swu.ac.th/jspui/handle/123456789/12214
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85077821709&doi=10.1088%2f1742-6596%2f1380%2f1%2f012089&partnerID=40&md5=3c3ba635d6fe328a5360cf150f78d07c
ISSN: 17426588
Appears in Collections:Scopus 1983-2021

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