Vertical distribution of HMXBs in NGC 55: Constraining their centre of mass velocity

Autor:	Jeff J. Andrews, Babis Politakis, Andreas Zezas, Stephen J. Williams
Rok vydání:	2018
Předmět:	0106 biological sciences Physics Distribution (number theory) Space and Planetary Science 0103 physical sciences Astronomy and Astrophysics Astrophysics 010303 astronomy & astrophysics 010603 evolutionary biology 01 natural sciences
Zdroj:	Proceedings of the International Astronomical Union. 14:358-361
ISSN:	1743-9221 1743-9213
DOI:	10.1017/s1743921319001236
Popis:	We analyse the vertical distribution of High Mass X-ray Binaries (HMXBs) in NGC 55, the nearest edge-on galaxy to the Milky Way. Our analysis reveals significant spatial offsets of HMXBs from the star forming regions, greater than those observed in the SMC and the LMC but similar with the Milky Way. The spatial offsets can be explained by a momentum kick the X-ray binaries receive during the formation of the compact object. The difference between the scale height of the vertical distribution of HMXBs and the vertical distribution of star-forming activity is 0.48±0.04 kpc. The centre-of-mass velocity of the distribution of HMXBs in NGC 55 is moving at a velocity of 52.4±11.4 km s−1, greater than the corresponding velocity of HMXBs in the SMC and LMC, but consistent with velocities of Milky Way HMXBs.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::bd4935d7444fc6b38d0c87aa862f32ac https://doi.org/10.1017/s1743921319001236 Zobrazit plný text záznamu Plný text ve formátu PDF