TY - JOUR
T1 - SDSS-IV MaNGA
T2 - A SERENDIPITOUS OBSERVATION of A POTENTIAL GAS ACCRETION EVENT
AU - Cheung, Edmond
AU - Stark, David V.
AU - Huang, Song
AU - Rubin, Kate H.R.
AU - Lin, Lihwai
AU - Tremonti, Christy
AU - Zhang, Kai
AU - Yan, Renbin
AU - Bizyaev, Dmitry
AU - Boquien, Médéric
AU - Brownstein, Joel R.
AU - Drory, Niv
AU - Gelfand, Joseph D.
AU - Knapen, Johan H.
AU - Maiolino, Roberto
AU - Malanushenko, Olena
AU - Masters, Karen L.
AU - Merrifield, Michael R.
AU - Pace, Zach
AU - Pan, Kaike
AU - Riffel, Rogemar A.
AU - Roman-Lopes, Alexandre
AU - Rujopakarn, Wiphu
AU - Schneider, Donald P.
AU - Stott, John P.
AU - Thomas, Daniel
AU - Weijmans, Anne Marie
N1 - Funding Information:
The Ohio State University, Pennsylvania State University, Shanghai Astronomical Observatory, United Kingdom Participation Group, Universidad Nacional Autonoma de Mexico, University of Arizona, University of Colorado Boulder, University of Oxford, University of Portsmouth, University of Utah, University of Virginia, University of Washington, University of Wisconsin, Vanderbilt University, and Yale University. D.B. is supported by grant RSCF-14-22-00041. A.W. acknowledges support from a Leverhulme Early Career Fellowship. J.H.K. acknowledges financial support from the Spanish Ministry of Economy and Competitiveness (MINECO) under grant number AYA2013-41243-P and thanks the Astrophysics Research Institute of Liverpool John Moores University for their hospitality, and the Spanish Ministry of Education, Culture and Sports for financial support of his visit there, through grant number PR2015-00512.
Publisher Copyright:
© 2016. The American Astronomical Society. All rights reserved.
PY - 2016/12/1
Y1 - 2016/12/1
N2 - The nature of warm, ionized gas outside of galaxies may illuminate several key galaxy evolutionary processes. A serendipitous observation by the MaNGA survey has revealed a large, asymmetric Hα complex with no optical counterpart that extends ≈8″ (≈6.3 kpc) beyond the effective radius of a dusty, starbursting galaxy. This Hα extension is approximately three times the effective radius of the host galaxy and displays a tail-like morphology. We analyze its gas-phase metallicities, gaseous kinematics, and emission-line ratios and discuss whether this Hα extension could be diffuse ionized gas, a gas accretion event, or something else. We find that this warm, ionized gas structure is most consistent with gas accretion through recycled wind material, which could be an important process that regulates the low-mass end of the galaxy stellar mass function.
AB - The nature of warm, ionized gas outside of galaxies may illuminate several key galaxy evolutionary processes. A serendipitous observation by the MaNGA survey has revealed a large, asymmetric Hα complex with no optical counterpart that extends ≈8″ (≈6.3 kpc) beyond the effective radius of a dusty, starbursting galaxy. This Hα extension is approximately three times the effective radius of the host galaxy and displays a tail-like morphology. We analyze its gas-phase metallicities, gaseous kinematics, and emission-line ratios and discuss whether this Hα extension could be diffuse ionized gas, a gas accretion event, or something else. We find that this warm, ionized gas structure is most consistent with gas accretion through recycled wind material, which could be an important process that regulates the low-mass end of the galaxy stellar mass function.
KW - galaxies: abundances
KW - galaxies: evolution
KW - galaxies: formation
KW - galaxies: starburst
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U2 - 10.3847/0004-637X/832/2/182
DO - 10.3847/0004-637X/832/2/182
M3 - Article
AN - SCOPUS:85004125557
VL - 832
JO - Astrophysical Journal
JF - Astrophysical Journal
SN - 0004-637X
IS - 2
M1 - 182
ER -