Skip to main content

MULTI-EPOCH SPECTROSCOPY OF DWARF GALAXIES WITH AGN SIGNATURES: IDENTIFYING SOURCES WITH PERSISTENT BROAD H alpha EMISSION

Author(s): Baldassare, Vivienne F; Reines, Amy E; Gallo, Elena; Greene, Jenny E.; Graur, Or; et al

Download
To refer to this page use: http://arks.princeton.edu/ark:/88435/pr14x77
Full metadata record
DC FieldValueLanguage
dc.contributor.authorBaldassare, Vivienne F-
dc.contributor.authorReines, Amy E-
dc.contributor.authorGallo, Elena-
dc.contributor.authorGreene, Jenny E.-
dc.contributor.authorGraur, Or-
dc.contributor.authorGeha, Marla-
dc.contributor.authorHainline, Kevin-
dc.contributor.authorCarroll, Christopher M-
dc.contributor.authorHickox, Ryan C-
dc.date.accessioned2019-10-09T19:33:00Z-
dc.date.available2019-10-09T19:33:00Z-
dc.date.issued2016-09-20en_US
dc.identifier.citationBaldassare, Vivienne F, Reines, Amy E, Gallo, Elena, Greene, Jenny E, Graur, Or, Geha, Marla, Hainline, Kevin, Carroll, Christopher M, Hickox, Ryan C. (2016). MULTI-EPOCH SPECTROSCOPY OF DWARF GALAXIES WITH AGN SIGNATURES: IDENTIFYING SOURCES WITH PERSISTENT BROAD H alpha EMISSION. ASTROPHYSICAL JOURNAL, 829 (10.3847/0004-637X/829/1/57en_US
dc.identifier.issn0004-637X-
dc.identifier.urihttp://arks.princeton.edu/ark:/88435/pr14x77-
dc.description.abstractWe use time-domain optical spectroscopy to distinguish between broad emission lines powered by accreting black holes (BHs) and stellar processes (i.e., supernovae) for 16 galaxies identified as active galactic nucleus (AGN) candidates by Reines et al (2013). Our study is primarily focused on those objects with narrow emission line ratios dominated by star formation, for which the origin of the broad H alpha emission was unclear. Based on follow-up spectroscopy, we find that the broad H alpha emission has faded or was ambiguous for all of the star-forming objects (14/16), over baselines ranging from 5-14 years, suggesting a transient stellar process was responsible for the broad emission in previous Sloan Digital Sky Survey observations. For the two objects in our follow-up sample with narrow-line AGN signatures (RGG 9 and RGG 119), we find persistent broad H alpha emission consistent with an AGN origin. Additionally, we use high spectral resolution observations to measure stellar velocity dispersions for 15 objects in the Reines et al. (2013) sample, all with narrow-line ratios indicating the presence of an AGN. Stellar masses range from similar to 5 x 10(8) to 3 x 10(9) M-circle dot, and we measure sigma* in the range of 28-71 kms(-1). These sigma(*) correspond to some of the lowest-mass galaxies with optical signatures of AGN activity. We show that RGG 119, the one object that has both a measured sigma(*) and persistent broad H alpha emission, falls near the extrapolation of the M-BH - sigma(*) relation to the low-mass end.en_US
dc.language.isoen_USen_US
dc.relationhttps://ui.adsabs.harvard.edu/abs/2016ApJ...829...57B/abstracten_US
dc.relation.ispartofASTROPHYSICAL JOURNALen_US
dc.rightsFinal published version. Article is made available in OAR by the publisher's permission or policy.en_US
dc.titleMULTI-EPOCH SPECTROSCOPY OF DWARF GALAXIES WITH AGN SIGNATURES: IDENTIFYING SOURCES WITH PERSISTENT BROAD H alpha EMISSIONen_US
dc.typeJournal Articleen_US
dc.identifier.doidoi:10.3847/0004-637X/829/1/57-
dc.date.eissued2016-09-21en_US
dc.identifier.eissn1538-4357-
pu.type.symplectichttp://www.symplectic.co.uk/publications/atom-terms/1.0/journal-articleen_US

Files in This Item:
File Description SizeFormat 
Baldassare_2016_ApJ_829_57.pdf2.42 MBAdobe PDFView/Download
apjaa2819figset13.tar.gz12.76 MBUnknownView/Download


Items in OAR@Princeton are protected by copyright, with all rights reserved, unless otherwise indicated.