SIMBAD references

2017MNRAS.467L...1E - Mon. Not. R. Astron. Soc., 467, L1-L5 (2017/May-1)

The ultraluminous X-ray source HoII X-1: kinematic evidence of its escape from a cluster.


Abstract (from CDS):

We analyse the structure and kinematics of ionized gas in the vicinity of the ultraluminous X-ray source (ULX) HoII X-1 in the Holmberg II galaxy using observational data obtained with a scanning Fabry-Perot interferometer in the Hα, [S II] and [O III] emission lines at the Russian 6-m telescope. Decomposition of the line profiles allows us to identify the broad component of emission lines caused by the ULX action. We found evidence of an expanding superbubble around the young star cluster located in the region studied. We conclude that the blueshifted 'arc' around the ULX observed in the line-of-sight velocity field may correspond to a bow shock caused by the ULX movement from that nearby young star cluster. If this interpretation is correct, it will be the first kinematic evidence of a ULX's escape from its parent star cluster.

Abstract Copyright: © 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): ISM: bubbles - H II regions - ISM: kinematics and dynamics - galaxies: individual: Holmberg II - X-rays: individual: HoII X-1 - X-rays: individual: HoII X-1

Simbad objects: 5

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