Outlying Hα emitters in SDSS IV MaNGA

Bait, Omkar; Wadadekar, Yogesh; Barway, Sudhanshu

doi:10.1093/mnras/stz433

Title: Outlying Hα emitters in SDSS IV MaNGA

Journal Article · 12 February 2019 · Monthly Notices of the Royal Astronomical Society

DOI: https://doi.org/10.1093/mnras/stz433 · OSTI ID:1495619

^[1]; Wadadekar, Yogesh ^[1]; Barway, Sudhanshu ^[2]

National Centre for Radio Astrophysics, Tata Institute of Fundamental Research, Post Bag 3, Ganeshkhind, Pune 411 007, India
Indian Institute of Astrophysics (IIA), II Block, Koramangala, Bengaluru 560 034, India

We have carried out a systematic search for outlying Hα emitters in the entire Data Release 14 of the Sloan Digital Sky Survey (SDSS) IV Mapping Nearby Galaxies at APO (MaNGA) survey. We have discovered six outlying Hα emitters with no bright underlying optical continuum emission in the imaging Data Release 5 from the Dark Energy Camera Legacy Survey (DECaLS) and Data Release 6 of the Mayall z-band Legacy Survey (MzLS) + Beijing–Arizona Sky Survey (BASS). They also show a velocity field that is different from that of the host galaxy. These outlying Hα emitters all have extended structure in the Hα image. Their emission line ratios show that they are photoionized due to an active galactic nucleus (AGN) or a mixture of both an AGN and star formation. Finally, some of them are very likely to be fainter counterparts of Hanny’s Voorwerp-like objects.

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Sponsoring Organization:: USDOE Office of Science (SC); Alfred P. Sloan Foundation

OSTI ID:: 1495619

Alternate ID(s):: OSTI ID: 1527377

Journal Information:: Monthly Notices of the Royal Astronomical Society, Journal Name: Monthly Notices of the Royal Astronomical Society Journal Issue: 1 Vol. 485; ISSN 0035-8711

Publisher:: Royal Astronomical SocietyCopyright Statement

Country of Publication:: United Kingdom

Language:: English

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