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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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  • Lihwai Lin
  • Jing-Hua Lin
  • Chin-Hao Hsu
  • Hai Fu
  • Song Huang
  • Sebastián F. Sánchez
  • Stephen Gwyn
  • Joseph D. Gelfand
  • Edmond Cheung
  • Karen Masters
  • Sébastien Peirani
  • Wiphu Rujopakarn
  • David V. Stark
  • Francesco Belfiore
  • M. S. Bothwell
  • Kevin Bundy
  • Alex Hagen
  • Lei Hao
  • Shan Huang
  • David Law
  • Cheng Li
  • Chris Lintott
  • Roberto Maiolino
  • Alexandre Roman-Lopes
  • Wei-Hao Wang
  • Ting Xiao
  • Fangting Yuan
  • Dmitry Bizyaev
  • Elena Malanushenko
  • Niv Drory
  • J. G. Fernández-Trincado
  • Zach Pace
  • Kaike Pan
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.
Original languageEnglish
JournalThe Astrophysical Journal
Issue number1
Publication statusPublished - 28 Feb 2017


  • Lin_2017_ApJ_837_32

    Rights statement: Reproduced by permission of the AAS.

    Final published version, 2.2 MB, PDF document

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