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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Two peculiar fast transients in a strongly lensed host galaxy

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Author(s):
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Rodney, S. A. [1] ; Balestra, I. [2] ; Bradac, M. [3] ; Brammer, G. [4] ; Broadhurst, T. [5, 6] ; Caminha, G. B. [7, 8] ; Chirivi, G. [9] ; Diego, J. M. [10] ; Filippenko, A. V. [11, 12] ; Foley, R. J. [13] ; Graur, O. [14, 15, 16] ; Grillo, C. [17, 18] ; Hemmati, S. [19] ; Hjorth, J. [18] ; Hoag, A. [3] ; Jauzac, M. [20, 21, 22] ; Jha, S. W. [23] ; Kawamata, R. [24] ; Kelly, P. L. [25, 11] ; McCully, C. [26, 27] ; Mobasher, B. [28] ; Molino, A. [29, 30] ; Oguri, M. [31, 32, 33] ; Richard, J. [34] ; Riess, A. G. [35, 4] ; Rosati, P. [8] ; Schmidt, K. B. [26, 36] ; Selsing, J. [18] ; Sharon, K. [37] ; Strolger, L. -G. [4] ; Suyu, S. H. [9, 38, 39] ; Treu, T. [40] ; Weiner, B. J. [41] ; Williams, L. L. R. [25] ; Zitrin, A. [42]
Total Authors: 35
Affiliation:
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[1] Univ South Carolina, Dept Phys & Astron, Columbia, SC 29208 - USA
[2] Univ Observ Munich, Munich - Germany
[3] Univ Calif Davis, Dept Phys, Davis, CA 95616 - USA
[4] Space Telescope Sci Inst, 3700 San Martin Dr, Baltimore, MD 21218 - USA
[5] Euskal Herriko Unibertsitatea UPV EHU, Fis Teorikoa, Zientzia & Teknol Fak, Leioa - Spain
[6] Ikerbasque, Basque Fdn Sci, Alameda, CA - Spain
[7] Univ Groningen, Kapteyn Astron Inst, POB 800, NL-9700 AV Groningen - Netherlands
[8] Univ Ferrara, Dipartimento Fis & Sci Terra, Ferrara - Italy
[9] Max Planck Inst Astrophys, Garching - Germany
[10] Inst Fis Cantabria UC CSIC, IFCA, Santander - Spain
[11] Univ Calif Berkeley, Dept Astron, 601 Campbell Hall, Berkeley, CA 94720 - USA
[12] Univ Calif Berkeley, Miller Inst Basic Res Sci, Berkeley, CA 94720 - USA
[13] Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA 95064 - USA
[14] Amer Museum Nat Hist, Dept Astrophys, New York, NY 10024 - USA
[15] Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 - USA
[16] NYU, Ctr Cosmol & Particle Phys, New York, NY - USA
[17] Univ Milan, Dipartimento Fis, Milan - Italy
[18] Univ Copenhagen, Niels Bohr Inst, Dark Cosmol Ctr, Copenhagen - Denmark
[19] CALTECH, Infrared Proc & Anal Ctr, Pasadena, CA - USA
[20] Univ Durham, Dept Phys, Ctr Extragalact Astron, Durham - England
[21] Univ Durham, Inst Computat Cosmol, Durham - England
[22] Univ KwaZulu Natal, Sch Math Sci, Astrophys & Cosmol Res Unit, Durban - South Africa
[23] Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ - USA
[24] Univ Tokyo, Grad Sch Sci, Dept Astron, Tokyo - Japan
[25] Univ Minnesota, Sch Phys & Astron, Minneapolis, MN 55455 - USA
[26] Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 - USA
[27] Las Cumbres Observ Global Telescope Network, Goleta, CA - USA
[28] Univ Calif Riverside, Dept Phys & Astron, Riverside, CA 92521 - USA
[29] Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer, Sao Paulo - Brazil
[30] CSIC, Inst Astrofis Andalucia, Granada - Spain
[31] Univ Tokyo, Dept Phys, Tokyo - Japan
[32] Univ Tokyo, Res Ctr Early Universe, Tokyo - Japan
[33] Univ Tokyo, Kavli Inst Phys & Math Universe Kavli IPMU, WPI, Kashiwa, Chiba - Japan
[34] Univ Lyon1, Univ Lyon, Ens Lyon, CNRS, Ctr Rech Astrophys Lyon UMR5574, F-69230 St Genis Laval - France
[35] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 - USA
[36] Leibniz Inst Astrophys Potsdam AIP, Potsdam - Germany
[37] Univ Michigan, Dept Astron, Ann Arbor, MI 48109 - USA
[38] Acad Sinica, Inst Astron & Astrophys, Taipei - Taiwan
[39] Tech Univ Munich, Phys Dept, Garching - Germany
[40] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA - USA
[41] Univ Arizona, Dept Astron, Tucson, AZ - USA
[42] Ben Gurion Univ Negev, Beer Sheva - Israel
Total Affiliations: 42
Document type: Journal article
Source: NATURE ASTRONOMY; v. 2, n. 4, p. 324-333, APR 2018.
Web of Science Citations: 7
Abstract

A massive galaxy cluster can serve as a magnifying glass for distant stellar populations, as strong gravitational lensing magnifies background galaxies and exposes details that are otherwise undetectable. In time-domain astronomy, imaging programmes with a short cadence are able to detect rapidly evolving transients, previously unseen by surveys designed for slowly evolving supernovae. Here, we describe two unusual transient events discovered in a Hubble Space Telescope programme that combined these techniques with high-cadence imaging on a field with a strong-lensing galaxy cluster. These transients were faster and fainter than any supernovae, but substantially more luminous than a classical nova. We find that they can be explained as separate eruptions of a luminous blue variable star or a recurrent nova, or as an unrelated pair of stellar microlensing events. To distinguish between these hypotheses will require clarification of the cluster lens models, along with more high-cadence imaging of the field that could detect related transient episodes. This discovery suggests that the intersection of strong lensing with high-cadence transient surveys may be a fruitful path for future astrophysical transient studies. (AU)

FAPESP's process: 14/11806-9 - Challenges for the new generation of wide-field photometric redshift surveys like J-PAS
Grantee:Alberto Molino Benito
Support type: Scholarships in Brazil - Post-Doctorate