Magnetized hypermassive neutron star collapse: a central engine for short gamma-ray bursts Export

@misc{citeulike:553455, abstract = {A hypermassive neutron star (HMNS) is a possible transient formed after the merger of a neutron star binary. In the latest magnetohydrodynamic simulations in full general relativity, we find that a magnetized HMNS undergoes `delayed' collapse to a rotating black hole (BH) as a result of angular momentum transport via magnetic braking and the magnetorotational instability. The outcome is a BH surrounded by a massive, hot torus with a collimated magnetic field. The torus accretes onto the BH at a quasi-steady accretion rate \~{}10 solar mass/s; the lifetime of the torus is \~{}10 ms. The torus has a temperature \sim 10^{12} K, leading to copious neutrino-antineutrino thermal radiation. Therefore, the collapse of an HMNS is a promising scenario for generating short-duration gamma-ray bursts and an accompanying burst of gravitational waves and neutrinos.}, archivePrefix = {arXiv}, author = {Shibata, Masaru and Duez, Matthew D. and Liu, Yuk T. and Shapiro, Stuart L. and Stephens, Branson C.}, citeulike-article-id = {553455}, citeulike-linkout-0 = {http://arxiv.org/abs/astro-ph/0511142}, citeulike-linkout-1 = {http://arxiv.org/pdf/astro-ph/0511142}, day = {4}, eprint = {astro-ph/0511142}, keywords = {collapse, ns, sgrb}, month = {Nov}, posted-at = {2006-03-15 21:51:57}, priority = {2}, title = {Magnetized hypermassive neutron star collapse: a central engine for short gamma-ray bursts}, url = {http://arxiv.org/abs/astro-ph/0511142}, year = {2005} }

TY - ELEC ID - citeulike:553455 L3 - citeulike-article-id:553455 N2 - A hypermassive neutron star (HMNS) is a possible transient formed after the merger of a neutron star binary. In the latest magnetohydrodynamic simulations in full general relativity, we find that a magnetized HMNS undergoes `delayed' collapse to a rotating black hole (BH) as a result of angular momentum transport via magnetic braking and the magnetorotational instability. The outcome is a BH surrounded by a massive, hot torus with a collimated magnetic field. The torus accretes onto the BH at a quasi-steady accretion rate ~10 solar mass/s; the lifetime of the torus is ~10 ms. The torus has a temperature \sim 10^{12} K, leading to copious neutrino-antineutrino thermal radiation. Therefore, the collapse of an HMNS is a promising scenario for generating short-duration gamma-ray bursts and an accompanying burst of gravitational waves and neutrinos. TI - Magnetized hypermassive neutron star collapse: a central engine for short gamma-ray bursts KW - collapse KW - ns KW - sgrb AU - Shibata, Masaru AU - Duez, Matthew AU - Liu, Yuk AU - Shapiro, Stuart AU - Stephens, Branson PY - 2005/Nov/04/ UR - http://arxiv.org/abs/astro-ph/0511142 ER -