Ultraluminous X-ray Sources in Seven Edge-On Spiral Galaxies [article]

Kristen C. Dage, Noah Vowell, Erica Thygesen, Arash Bahramian, Daryl Haggard, Konstantinos Kovlakas, Arunav Kundu, Thomas J. Maccarone, Jay Strader, Ryan Urquhart, Stephen E. Zepf
2021 arXiv   pre-print
We investigate a sample of seven edge-on spiral galaxies using Chandra observations. Edge-on spiral galaxies allow us to clearly separate source associated with their star-forming regions versus the outer edges of the system; offering a clear advantage over other systems. We uncover a number of X-ray point sources across these galaxies, and after eliminating contaminating foreground and background sources, we identify 12 candidate ultraluminous X-ray sources. All of these sources are projected
more » ... nto the central regions, implying that the majority of ULXs in this sample of spiral galaxies are disk/bulge, and thus not halo sources. This also includes two transient ULXs, which may be long-duration transients and low mass X-ray binaries. This finding illustrates the need for further studies of transient ULXs.
arXiv:2109.14407v1 fatcat:wnsi25daazfcvbiaummyjjraaq