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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/31294
Title: Detecting Radio AGN Signatures in Red Geysers
Authors: Roy, Namrata
Bundy, Kevin
Cheung, Edmond
Rujopakarn, Wiphu
Cappellari, Michele
BELFIORE, FRANCESCO MICHEL CONCETTO 
Yan, Renbin
Heckman, Tim
Bershady, Matthew
Greene, Jenny
Westfall, Kyle
Drory, Niv
Rubin, Kate
Law, David
Zhang, Kai
Gelfand, Joseph
Bizyaev, Dmitry
Wake, David
Masters, Karen
Thomas, Daniel
Li, Cheng
Riffel, Rogemar A.
Issue Date: 2018
Journal: THE ASTROPHYSICAL JOURNAL 
Number: 869
Issue: 2
First Page: 117
Abstract: A new class of quiescent galaxies harboring possible AGN-driven winds has been discovered using spatially resolved optical spectroscopy from the ongoing SDSS-IV MaNGA survey. These galaxies, termed “red geysers,” constitute 5%-10% of the local quiescent population and are characterized by narrow bisymmetric patterns in ionized gas emission features. Cheung et al. argued that these galaxies host large-scale AGN-driven winds that may play a role in suppressing star formation at late times. In this work, we test the hypothesis that AGN activity is ultimately responsible for the red geyser phenomenon. We compare the nuclear radio activity of the red geysers to a matched control sample with similar stellar mass, redshift, rest-frame NUV - r color, axis ratio, and presence of ionized gas. We have used the 1.4 GHz radio continuum data from the VLA FIRST survey to stack the radio flux from the red geyser and control samples. In addition to a three times higher FIRST detection rate, we find that red geysers have a 5σ higher level of average radio flux than control galaxies. After restricting to rest-frame NUV - r color >5 and checking mid-IR WISE photometry, we rule out star formation contamination and conclude that red geysers are associated with more active AGNs. Red geysers and a possibly related class with disturbed Hα emission account for 40% of all radio-detected red galaxies with log (M <SUB>⋆</SUB>/M <SUB>⊙</SUB>) < 11. Our results support a picture in which episodic AGN activity drives large-scale, relatively weak ionized winds that may provide a feedback mechanism for many early-type galaxies.
URI: http://hdl.handle.net/20.500.12386/31294
URL: https://iopscience.iop.org/article/10.3847/1538-4357/aaee72
https://api.elsevier.com/content/abstract/scopus_id/85059849496
ISSN: 0004-637X
DOI: 10.3847/1538-4357/aaee72
Bibcode ADS: 2018ApJ...869..117R
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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Roy_2018_ApJ_869_117.pdf[Administrators only]2.42 MBAdobe PDF
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