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A new, faint popula...
A new, faint population of X-ray transients
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- Bauer, Franz E. (författare)
- EMBIGGEN Anillo,Millennium Institute for Astrophysics,Pontifical Catholic University of Chile,Space Science Institute
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- Treister, Ezequiel (författare)
- Pontifical Catholic University of Chile,EMBIGGEN Anillo,University of Concepción
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- Schawinski, Kevin (författare)
- ETH Zürich
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- Schulze, Steve (författare)
- Millennium Institute for Astrophysics,Pontifical Catholic University of Chile
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- Luo, Bin (författare)
- Nanjing University
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- Alexander, David M. (författare)
- Durham University
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- Brandt, William N. (författare)
- Pennsylvania State University
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- Comastri, Andrea (författare)
- INAF Osservatorio Astronomico di Bologna
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- Forster, Francisco (författare)
- University of Chile,Millennium Institute for Astrophysics
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- Gilli, Roberto (författare)
- INAF Osservatorio Astronomico di Bologna
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- Kann, David Alexander (författare)
- Thuringer Landessternwarte Tautenburg
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- Maeda, Keiichi (författare)
- Kyoto University,University of Tokyo
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- Nomoto, Ken'ichi (författare)
- University of Tokyo
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- Paolillo, Maurizio (författare)
- Istituto Nazionale di Fisica Nucleare, Sezione di Napoli,University of Naples Federico II,Italian Space Agency
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- Ranalli, Piero (författare)
- Lund University,Lunds universitet,Astronomi - Genomgår omorganisation,Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation,Naturvetenskapliga fakulteten,Lund Observatory - Undergoing reorganization,Department of Astronomy and Theoretical Physics - Undergoing reorganization,Faculty of Science
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- Schneider, Donald P. (författare)
- Pennsylvania State University
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- Shemmer, Ohad (författare)
- University of North Texas
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- Tanaka, Masaomi (författare)
- National Astronomical Observatory of Japan
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- Tolstov, Alexey (författare)
- University of Tokyo
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- Tominaga, Nozomu (författare)
- Konan University
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- Tozzi, Paolo (författare)
- INAF - Osservatorio Astrofisico di Arcetri
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- Vignali, Cristian (författare)
- University of Bologna,INAF Osservatorio Astronomico di Bologna
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- Wang, Junxian (författare)
- University of Science and Technology of China
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- Xue, Yongquan (författare)
- University of Science and Technology of China
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- Yang, Guang (författare)
- Pennsylvania State University
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(creator_code:org_t)
- 2017-02-20
- 2017
- Engelska 17 s.
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Ingår i: Monthly Notices of the Royal Astronomical Society. - : Oxford University Press (OUP). - 0035-8711 .- 1365-2966. ; 467:4, s. 4841-4857
- Relaterad länk:
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http://dx.doi.org/10...
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http://dro.dur.ac.uk...
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https://lup.lub.lu.s...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- We report on the detection of a remarkable new fast high-energy transient found in the Chandra Deep Field-South, robustly associated with a faint (mR = 27.5mag, zph ~2.2) host in the CANDELS survey. The X-ray event is comprised of 115+12 -11 net 0.3-7.0 keV counts, with a light curve characterized by an ~100 s rise time, a peak 0.3-10 keV flux of ~5 × 10-12 erg s-1 cm-2 and a power-law decay time slope of -1.53 ± 0.27. The average spectral slope is Γ = 1.43+0.23 -0.13, with no clear spectral variations. The X-ray and multiwavelength properties effectively rule out the vast majority of previously observed highenergy transients. A few theoretical possibilities remain: an 'orphan' X-ray afterglow from an off-axis short-duration gamma-ray burst (GRB) with weak optical emission, a low-luminosity GRB at high redshift with no prompt emission below ~20 keV rest frame, or a highly beamed tidal disruption event (TDE) involving an intermediate-mass black hole and a white dwarf with little variability. However, none of the above scenarios can completely explain all observed properties. Although large uncertainties exist, the implied rate of such events is comparable to those of orphan and low-luminosity GRBs as well as rare TDEs, implying the discovery of an untapped regime for a known transient class, or a new type of variable phenomena whose nature remains to be determined.
Ämnesord
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Nyckelord
- Galaxies: active
- Gamma-ray burst: general
- X-rays: bursts
- X-rays: general
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- ref (ämneskategori)
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Bauer, Franz E.
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Treister, Ezequi ...
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Schawinski, Kevi ...
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Schulze, Steve
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Luo, Bin
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Alexander, David ...
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visa fler...
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Brandt, William ...
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Comastri, Andrea
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Forster, Francis ...
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Gilli, Roberto
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Kann, David Alex ...
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Maeda, Keiichi
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Nomoto, Ken'ichi
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Paolillo, Mauriz ...
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Ranalli, Piero
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Schneider, Donal ...
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Shemmer, Ohad
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Tanaka, Masaomi
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Tolstov, Alexey
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Tominaga, Nozomu
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Tozzi, Paolo
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Vignali, Cristia ...
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Wang, Junxian
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Xue, Yongquan
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Yang, Guang
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