Journal article
SDSS-IV MaNGA: The Nature of an Off-galaxy H-alpha Blob-A Multiwavelength View of Offset Cooling in a Merging Galaxy Group
The Astrophysical journal, Vol.903(1), p.16
11/01/2020
DOI: 10.3847/1538-4357/abb80c
Abstract
Galaxies in dense environments, such as groups and clusters, experience various processes by which galaxies gain and lose gas. Using data from the SDSS-IV MaNGA survey, we previously reported the discovery of a giant (68 kpc in diameter) Ha blob, Totoro, about 8 kpc away from a pair of galaxies (Satsuki and Mei) residing in a galaxy group that is experiencing a group-group merger. Here, we combine interferometric (CO)-C-12(1-0) molecular gas data, new wide-field Ha, u-band data, and published X-ray data to determine the origin of the blob. Several scenarios are discussed to account for its multiwavelength properties, including (1) Ha gas being stripped from the galaxy Satsuki by ram pressure, (2) a separated low-surface-brightness galaxy, (3) gas being ejected or ionized by an active galactic nucleus (AGN), and (4) a cooling intragroup medium (IGM). Scenarios (1) and (2) are less favored by the present data. Scenario (3) is also less likely as there is no evidence for an active ongoing AGN in the host galaxy. We find that the CO (cold) and Ha (warm) gas coexist with X-ray (hot) structures; moreover, the derived cooling time is within the regime where molecular and Ha gas are expected. The coexistence of gas with different temperatures also agrees with that of cooling gas in other systems. Our multiwavelength results strongly suggest that the CO and Ha gas are the product of cooling from the IGM at its current location, i.e., cooling has occurred, and may be ongoing, well outside the host-galaxy core.
Details
- Title: Subtitle
- SDSS-IV MaNGA: The Nature of an Off-galaxy H-alpha Blob-A Multiwavelength View of Offset Cooling in a Merging Galaxy Group
- Creators
- Hsi-An Pan - Institute of Astronomy and Astrophysics, Academia SinicaLihwai Lin - Institute of Astronomy and Astrophysics, Academia SinicaBau-Ching Hsieh - Institute of Astronomy and Astrophysics, Academia SinicaMichal J. Michalowski - UL Research InstitutesMatthew S. Bothwell - University of CambridgeSong Huang - University of California, Santa CruzAlexei V. Moiseev - Special Astrophysical ObservatoryDmitry Oparin - Special Astrophysical ObservatoryEwan O'Sullivan - Center for Astrophysics Harvard & SmithsonianDiana M. Worrall - University of BristolSebastian F. Sanchez - Universidad Nacional Autónoma de MéxicoStephen Gwyn - Herzberg Institute of AstrophysicsDavid R. Law - Space Telescope Science InstituteDavid V. Stark - Haverford CollegeDmitry Bizyaev - New Mexico State UniversityCheng Li - Tsinghua UniversityChien-Hsiu Lee - NSF’s NOIRLabHai Fu - University of IowaFrancesco Belfiore - European Southern ObservatoryKevin Bundy - University of California, Santa CruzJose G. Fernandez-Trincado - University of AtacamaJoseph Gelfand - New York University Abu DhabiSebastien Peirani - Observatoire de la Côte d’Azur
- Resource Type
- Journal article
- Publication Details
- The Astrophysical journal, Vol.903(1), p.16
- Publisher
- Iop Publishing Ltd
- DOI
- 10.3847/1538-4357/abb80c
- ISSN
- 0004-637X
- eISSN
- 1538-4357
- Number of pages
- 17
- Grant note
- University of Notre Dame New York University Universidad Nacional Autonoma de Mexico INSU/CNRS (France); Centre National de la Recherche Scientifique (CNRS) Harvard-Smithsonian Center for Astrophysics; Smithsonian Institution Lawrence Berkeley National Laboratory; United States Department of Energy (DOE) PAPIIT-DGAPA-IN100519 / UNAM; Universidad Nacional Autonoma de Mexico Ohio State University National Astronomical Observatories of China Chilean Participation Group Max-Planck-Institut fur Astrophysik (MPA Garching) University of Washington Max-Planck-Institut fur Extraterrestrische Physik (MPE) University of Arizona New Mexico State University Pennsylvania State University University of Oxford University of Portsmouth 3180210 / FONDECYT; Comision Nacional de Investigacion Cientifica y Tecnologica (CONICYT); CONICYT FONDECYT Brazilian Participation Group University of Virginia ST/R000700/1 / STFC; UK Research & Innovation (UKRI); Science & Technology Facilities Council (STFC) Becas Iberoamerica Investigador 2019, Banco Santander Chile 05.619.21.0016; RFMEFI61919X0016 / Ministry of Science and Higher Education of the Russian Federation Johns Hopkins University 2018/30/E/ST9/00208 / National Science Centre, Poland through the SONATA BIS grant MPG (Germany); Max Planck Society University of Utah Observatario Nacional/MCTI MOST 108-2628-M-001-001-MY3 / Ministry of Science & Technology of Taiwan Vanderbilt University Center for High-Performance Computing at the University of Utah CDA-107-M03 / Academia Sinica; Academia Sinica - Taiwan 17-12-01335 / Russian Science Foundation; Russian Science Foundation (RSF) Max-Planck-Institut fur Astronomie (MPIA Heidelberg) Carnegie Institution for Science U.S. Department of Energy Office of Science; United States Department of Energy (DOE) IGN (Spain) Alfred P. Sloan Foundation Carnegie Mellon University United Kingdom Participation Group Instituto de Astrofisica de Canarias University of Wisconsin Royal Society of Edinburgh International Exchange Programme Yale University Kavli Institute for the Physics and Mathematics of the Universe (IPMU)/University of Tokyo French Participation Group G07-18162X; NAS8-03060 / National Aeronautics and Space Administration (NASA) through Chandra X-ray Center FC-2016-01-1916; CB285080 / CONACYT; Consejo Nacional de Ciencia y Tecnologia (CONACyT) University of Colorado Boulder Leibniz Institut fur Astrophysik Potsdam (AIP) Shanghai Astronomical Observatory Korean Participation Group
- Language
- English
- Date published
- 11/01/2020
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984428666002771
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