The Ultraviolet-Bright, Slowly Declining Transient PS1-11Af As A Partial Tidal Disruption Event

dc.contributor.utaustinauthorMarion, G. H.en_US
dc.creatorChornock, Ryanen_US
dc.creatorBerger, E.en_US
dc.creatorGezari, S.en_US
dc.creatorZauderer, B. A.en_US
dc.creatorRest, A.en_US
dc.creatorChomiuk, L.en_US
dc.creatorKamble, A.en_US
dc.creatorSoderberg, Alicia M.en_US
dc.creatorCzekala, I.en_US
dc.creatorDittmann, J.en_US
dc.creatorDrout, M.en_US
dc.creatorFoley, Ryan J.en_US
dc.creatorFong, W.en_US
dc.creatorHuber, M. E.en_US
dc.creatorKirshner, Robert P.en_US
dc.creatorLawrence, A.en_US
dc.creatorLunnan, R.en_US
dc.creatorMarion, G. H.en_US
dc.creatorNarayan, G.en_US
dc.creatorRiess, Adam G.en_US
dc.creatorRoth, K. C.en_US
dc.creatorSanders, N. E.en_US
dc.creatorScolnic, D.en_US
dc.creatorSmartt, S. J.en_US
dc.creatorSmith, K.en_US
dc.creatorStubbs, C. W.en_US
dc.creatorTonry, J. L.en_US
dc.creatorBurgett, W. S.en_US
dc.creatorChambers, K. C.en_US
dc.creatorFlewelling, H.en_US
dc.creatorHodapp, K. W.en_US
dc.creatorKaiser, N.en_US
dc.creatorMagnier, E. A.en_US
dc.creatorMartin, D. C.en_US
dc.creatorNeill, J. D.en_US
dc.creatorPrice, P. A.en_US
dc.creatorWainscoat, R.en_US
dc.description.abstractWe present the Pan-STARRS1 discovery of the long-lived and blue transient PS1-11af, which was also detected by Galaxy Evolution Explorer with coordinated observations in the near-ultraviolet (NUV) band. PS1-11af is associated with the nucleus of an early type galaxy at redshift z = 0.4046 that exhibits no evidence for star formation or active galactic nucleus activity. Four epochs of spectroscopy reveal a pair of transient broad absorption features in the UV on otherwise featureless spectra. Despite the superficial similarity of these features to P-Cygni absorptions of supernovae (SNe), we conclude that PS1-11af is not consistent with the properties of known types of SNe. Blackbody fits to the spectral energy distribution are inconsistent with the cooling, expanding ejecta of a SN, and the velocities of the absorption features are too high to represent material in homologous expansion near a SN photosphere. However, the constant blue colors and slow evolution of the luminosity are similar to previous optically selected tidal disruption events (TDEs). The shape of the optical light curve is consistent with models for TDEs, but the minimum accreted mass necessary to power the observed luminosity is only similar to 0.002 M-circle dot, which points to a partial disruption model. A full disruption model predicts higher bolometric luminosities, which would require most of the radiation to be emitted in a separate component at high energies where we lack observations. In addition, the observed temperature is lower than that predicted by pure accretion disk models for TDEs and requires reprocessing to a constant, lower temperature. Three deep non-detections in the radio with the Very Large Array over the first two years after the event set strict limits on the production of any relativistic outflow comparable to Swift J1644+57, even if off-axis.en_US
dc.description.sponsorshipNSF Astronomy and Astrophysics Postdoctoral Fellowship AST-1302954en_US
dc.description.sponsorshipNational Aeronautics and Space Administration through the Planetary Science Division of the NASA Science Mission Directorate NNX08AR22Gen_US
dc.description.sponsorshipNational Science Foundation AST-1238877, AST-1211196,AST-1009749, AST-1009863en_US
dc.description.sponsorship(PI: Berger) at the Gemini Observatory GS-2011A-Q-29en_US
dc.description.sponsorshipEuropean Research Council under the European Union/ERC 291222en_US
dc.description.sponsorshipNASA through the Astrophysics Theory Program NNX10AF62Gen_US
dc.description.sponsorshipFAS Science Division Research Computing Group at Harvard Universityen_US
dc.identifier.citationChornock, Ryan, E. Berger, S. Gezari, B. A. Zauderer, A. Rest, L. Chomiuk, A. Kamble et al. "The Ultraviolet-bright, Slowly Declining Transient PS1-11af as a Partial Tidal Disruption Event." The Astrophysical Journal, Vol. 780, No. 1 (Jan., 2014): 44.en_US
dc.relation.ispartofserialAstrophysical Journalen_US
dc.rightsAdministrative deposit of works to Texas ScholarWorks: This works author(s) is or was a University faculty member, student or staff member; this article is already available through open access or the publisher allows a PDF version of the article to be freely posted online. The library makes the deposit as a matter of fair use (for scholarly, educational, and research purposes), and to preserve the work and further secure public access to the works of the University.en_US
dc.subjectaccretion, accretion disksen_US
dc.subjectblack hole physicsen_US
dc.subjectgalaxies: nucleien_US
dc.subjectactive galactic nucleien_US
dc.subjectdigital sky surveyen_US
dc.subjectmassive black-holesen_US
dc.subjectquasi-stellar objectsen_US
dc.subjectbalmer linesen_US
dc.subjectx-ray outbursten_US
dc.subjectastronomy & astrophysicsen_US
dc.titleThe Ultraviolet-Bright, Slowly Declining Transient PS1-11Af As A Partial Tidal Disruption Eventen_US

Access full-text files

Original bundle

Now showing 1 - 1 of 1
Thumbnail Image
1.66 MB
Adobe Portable Document Format

License bundle

Now showing 1 - 1 of 1
No Thumbnail Available
1.65 KB
Plain Text