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Deep spectroscopy of the M-V similar to-14.8 host galaxy of a tidal disruption flare in A1795

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dc.contributor.authorMaksym, W. P.
dc.contributor.authorUlmer, M. P.
dc.contributor.authorRoth, K. C.
dc.contributor.authorIrwin, J. A.
dc.contributor.authorDupke, R.
dc.contributor.authorHo, L. C.
dc.contributor.authorKeel, W. C.
dc.contributor.authorAdami, C.
dc.contributor.otherUniversity of Alabama Tuscaloosa
dc.contributor.otherNorthwestern University
dc.contributor.otherUniversity of Michigan System
dc.contributor.otherUniversity of Michigan
dc.contributor.otherEureka Scientific
dc.contributor.otherPeking University
dc.contributor.otherCarnegie Institution for Science
dc.contributor.otherUDICE-French Research Universities
dc.contributor.otherAix-Marseille Universite
dc.date.accessioned2018-09-24T19:36:13Z
dc.date.available2018-09-24T19:36:13Z
dc.date.issued2014
dc.description.abstractA likely tidal disruption of a star by the intermediate-mass black hole (IMBH) of a dwarf galaxy was recently identified in association with Abell 1795. Without deep spectroscopy for this very faint object, however, the possibility of a more massive background galaxy or even a disc-instability flare from a weak active galactic nucleus (AGN) could not be dismissed. We have now obtained 8 h of Gemini spectroscopy which unambiguously demonstrates that the host galaxy is indeed an extremely low mass (M-star similar to 3 x 10(8) M-circle dot) galaxy in Abell 1795, comparable to the least massive galaxies determined to host IMBHs via other studies. We find that the spectrum is consistent with the X-ray flare being due to a tidal disruption event rather than an AGN flare. We also set improved limits on the black hole mass (log[M-lozenge/M-circle dot] similar to 5.3-5.7) and infer a 15 yr X-ray variability of a factor of greater than or similar to 10(4). The confirmation of this galaxy-black hole system provides a glimpse into a population of galaxies that is otherwise difficult to study, due to the galaxies' low masses and intrinsic faintness, but which may be important contributors to the tidal disruption rate.en_US
dc.format.mimetypeapplication/pdf
dc.identifier.citationMaksym, W. et al. (2014): Deep spectroscopy of the MV ∼ −14.8 host galaxy of a tidal disruption flare in A1795. Monthly Notices of the Royal Astronomical Society, 444(1). DOI: https://doi.org/10.1093/mnras/stu1485
dc.identifier.doi10.1093/mnras/stu1485
dc.identifier.orcidhttps://orcid.org/0000-0002-1129-7722
dc.identifier.urihttp://ir.ua.edu/handle/123456789/3947
dc.languageEnglish
dc.language.isoen_US
dc.publisherOxford University Press
dc.rights.licenseAttribution-NonCommercial 4.0 International (CC BY-NC 4.0)
dc.rights.urihttps://creativecommons.org/licenses/by-nc/4.0/
dc.subjectgalaxies: clusters: individual: Abell 1795
dc.subjectgalaxies: distances and redshifts
dc.subjectgalaxies: dwarf
dc.subjectgalaxies: kinematics and dynamics
dc.subjectgalaxies: nuclei
dc.subjectX-rays: bursts
dc.subjectMASSIVE BLACK-HOLES
dc.subjectSTELLAR POPULATION SYNTHESIS
dc.subjectSCALING RELATIONS
dc.subjectGLOBULAR-CLUSTER
dc.subjectEMISSION-LINES
dc.subjectWHITE-DWARFS
dc.subjectABELL 1795
dc.subjectX-RAY
dc.subjectSPECTRA
dc.subjectSTARS
dc.subjectAstronomy & Astrophysics
dc.titleDeep spectroscopy of the M-V similar to-14.8 host galaxy of a tidal disruption flare in A1795en_US
dc.typetext
dc.typeArticle

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