Resumen
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.
| Idioma original | English |
|---|---|
| Número de artículo | 182 |
| Publicación | Astrophysical Journal |
| Volumen | 832 |
| N.º | 2 |
| DOI | |
| Estado | Published - dic 1 2016 |
Nota bibliográfica
Publisher Copyright:© 2016. The American Astronomical Society. All rights reserved.
Financiación
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.
| Financiadores | Número del financiador |
|---|---|
| The Pennsylvania State University | |
| University of Wisconsin-Madison | |
| Leverhulme Trust | |
| Ohio Water Resources Center, Ohio State University | |
| University of Utah Health | |
| Virginia Agricultural Experiment Station, Virginia Polytechnic Institute and State University | |
| University of Portsmouth | |
| The George Washington University | |
| Vanderbilt Digestive Diseases Research Center, Vanderbilt University Medical Center | |
| Yale University | RSCF-14-22-00041 |
| Yale University | |
| Science and Technology Facilities Council | ST/K00090X/1, ST/K003119/1, ST/N000668/1, ST/M001172/1 |
| Science and Technology Facilities Council | |
| Ministerio de Economía y Competitividad | AYA2013-41243-P |
| Ministerio de Economía y Competitividad | |
| Ministerio de Educación, Cultura y Deporte | PR2015-00512 |
| Ministerio de Educación, Cultura y Deporte | |
| Japan Society for the Promotion of Science Fund for the Promotion of Joint International Research | 15K17604 |
| Japan Society for the Promotion of Science Fund for the Promotion of Joint International Research |
ASJC Scopus subject areas
- Astronomy and Astrophysics
- Space and Planetary Science