Work

Outlying Hα emitters in SDSS IV MaNGA

Year: 2019

Type: article

Abstract: 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. Some of them are very likely to be fainter counterparts of Hanny’s Voorwerp-like objects.

Source: Monthly Notices of the Royal Astronomical Society

DOI: 10.1093/mnras/stz433

Authors: Omkar Bait, Yogesh Wadadekar, Sudhanshu Barway

Institutions: Tata Institute of Fundamental Research, National Centre for Radio Astrophysics, Indian Institute of Astrophysics

Language: English

Topic: Galaxies: Formation, Evolution, Phenomena

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: National Science Foundation, U.S. Department of Energy, National Aeronautics and Space Administration, Science and Technology Facilities Council

OpenAlex ID: W2914230660

FWCI: 0.268

Cites: 57

Cited by: 8

Related to: 10