Formation and evolution of compact-object binaries in AGN disks. Merging black hole binaries in galactic nuclei: implications for advanced-LIGO detections. On the rate of neutron star binary mergers from globular clusters. Photometric and spectroscopic catalogs, host associations, and galactocentric offsets. Coevolution (or not) of supermassive black holes and host galaxies. A possible macronova in the late afterglow of the long-short burst GRB 060614. The light curve of the macronova associated with the long-short burst GRB 060614. The combined ultraviolet, optical, and near-infrared light curves of the kilonova associated with the binary neutron star merger GW170817: unified data set, analytic models, and physical implications. The final season reimagined: 30 tidal disruption events from the ZTF-I survey. Systematic light-curve modelling of TDEs: statistical differences between the spectroscopic classes. A public statistical sample for exploring supernova demographics. The Zwicky Transient Facility Bright Transient Survey. GRB 191019A: NOT optical afterglow and host association confirmation. A long-duration gamma-ray burst with a peculiar origin. A nearby long gamma-ray burst from a merger of compact objects. A kilonova following a long-duration gamma-ray burst at 350 Mpc. A very energetic supernova associated with the γ-ray burst of 29 March 2003. An unusual supernova in the error box of the γ-ray burst of 25 April 1998. The emergence of a lanthanide-rich kilonova following the merger of two neutron stars. A kilonova as the electromagnetic counterpart to a gravitational-wave source. ![]() Spectroscopic identification of r-process nucleosynthesis in a double neutron-star merger. Detection of near-infrared signatures of r-process nucleosynthesis with Gemini-South. The electromagnetic counterpart of the binary neutron star merger LIGO/Virgo GW170817. Optical emission from a kilonova following a gravitational-wave-detected neutron-star merger. GW170817: observation of gravitational waves from a binary neutron star inspiral. Black hole, neutron star, and white dwarf merger rates in AGN discs. Black hole and neutron star mergers in galactic nuclei. ![]() Dynamical formation signatures of black hole binaries in the first detected mergers by LIGO. Short gamma-ray bursts from binary neutron star mergers in globular clusters. Identifying, to the best of our knowledge, a first example of a dynamically produced GRB demonstrates the role that such bursts may have in probing dense environments and constraining dynamical fractions in gravitational wave populations. These may form in dense nuclear clusters or originate in a gaseous disc around the supermassive black hole. The progenitor, in this case, could be a compact object merger. The most likely route for progenitor formation is via dynamical interactions in the dense nucleus of the host. The lack of evidence for star formation and deep limits on any supernova emission disfavour a massive star origin. Here we report the case of GRB 191019A, a long GRB (a duration of T 90 = 64.4 ± 4.5 s), which we pinpoint close ( ⪅100 pc projected) to the nucleus of an ancient (>1 Gyr old) host galaxy at z = 0.248. These channels could also contribute substantially to the samples of compact object mergers detected as gravitational wave sources. However, a fraction of GRBs may result from dynamical interactions in dense environments. ![]() Most of these systems form via standard stellar evolution pathways. The majority of long-duration (>2 s) gamma-ray bursts (GRBs) arise from the collapse of massive stars, with a small proportion created from the merger of compact objects. A long-duration gamma-ray burst of dynamical origin from the nucleus of an ancient galaxy
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