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The data on the location of gamma-ray bursts (GRBs) relative to their host galaxies are used to derive the distribution of surface density of GRBs along the galaxy radius. It is shown that the gradient of GRB surface density changes abruptly near the half-light radius. In the central parts of galaxies the distribution of GRBs resembles closely the luminosity distribution, while in the outer parts the galactic surface brightness falls much steeper than the GRBs density. The radial distribution of type Ib/c supernovae is investigated on the basis of enlarged statistics. It is shown that SNe Ib/c do not differ significantly from other types of supernovae and their distribution is more similar to the one for recent star formation sites than that of GRBs. In spite of the poor statistics of GRBs, the difference in the distributions of active star formation regions and GRBs appears to be significant. We get the Kolmogorov-Smirnov probability P_ks of only 4% that GRBs and star-forming sites belong to the same distribution. The correlation of GRBs with the distribution of dark matter in the outer parts of galaxies is not excluded.
While the connection between Long Gamma-Ray Bursts (GRBs) and Type Ib/c Supernovae (SNe Ib/c) from stripped stars has been well-established, one key outstanding question is what conditions and factors lead to each kind of explosion in massive strippe
Recent studies find that some early-type galaxies host Type II or Ibc supernovae (SNe II, Ibc). This may imply recent star-formation activities in these SNe host galaxies, but a massive star origin of the SNe Ib so far observed in early-type galaxies
We discuss how gamma-ray burst (GRB) optical afterglows and multiwavelength observations of their host galaxies can be used to obtain information about the relative amounts of star formation happening in optical and submillimetre galaxies. That such
We present the results of the 16-cm-waveband continuum observations of four host galaxies of gamma-ray bursts (GRBs) 990705, 021211, 041006, and 051022 using the Australia Telescope Compact Array. Radio emission was not detected in any of the host ga
We present the results of a Hubble Space Telescope WFC3/F160W SNAPSHOT sur- vey of the host galaxies of 39 long-duration gamma-ray bursts (LGRBs) at z < 3. We have non-detections of hosts at the locations of 4 bursts. Sufficient accuracy to as- trome