SDSS IV MaNGA: discovery of an Hα blob associated with a dry galaxy pair - ejected gas or a 'dark' galaxy candidate?
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We report the discovery of a mysterious giant Halpha blob that is ~8 kpc away from the main MaNGA target 1-24145, one component of a dry galaxy merger, identified in the first-year SDSS-IV MaNGA data. The size of the Halpha blob is ~3-4 kpc in radius, and the Halpha distribution is centrally concentrated. However, there is no optical continuum counterpart in deep broadband images reaching ~26.9 mag per arcsec sq in surface brightness. We estimate that the masses of ionized and cold gases are 3.3 x 10^5 Msun and galaxy (UDG) interacting with MaNGA 1-24145 that further induces the gas inflow to fuel the AGN in MaNGA 1-24145.
|Journal||The Astrophysical Journal|
|Publication status||Published - 28 Feb 2017|
Rights statement: Reproduced by permission of the AAS.
Final published version, 2.2 MB, PDF document