%0 Generic %1 fragione2022implication %A Fragione, Giacomo %A Loeb, Abraham %D 2022 %K tifr %T Implication of spin constraints by the Event Horizon Telescope on stellar orbits in the Galactic Center %U http://arxiv.org/abs/2205.12274 %X The center of the Milky Way hosts the closest supermassive black hole, SgrA$^*$. Decades of near-infrared observations of our Galactic Center have shown the presence of a small population of stars (the so called S-star cluster) orbiting SgrA$^*$, which were recently reported to be arranged in two orthogonal disks. In this case, the timescale for Lense-Thirring precession of S-stars should be longer than their age, implying a low spin for SgrA$^*$. In contrast, the recent results by the Event Horizon Telescope favor a highly-spinning SgrA$^*$, which seem to suggest that the S-stars could not be arranged in disks. Alternatively, the spin of SgrA$^*$ must be small, suggesting that the models for its observed image are incomplete.

@misc{fragione2022implication, abstract = {The center of the Milky Way hosts the closest supermassive black hole, SgrA$^*$. Decades of near-infrared observations of our Galactic Center have shown the presence of a small population of stars (the so called S-star cluster) orbiting SgrA$^*$, which were recently reported to be arranged in two orthogonal disks. In this case, the timescale for Lense-Thirring precession of S-stars should be longer than their age, implying a low spin for SgrA$^*$. In contrast, the recent results by the Event Horizon Telescope favor a highly-spinning SgrA$^*$, which seem to suggest that the S-stars could not be arranged in disks. Alternatively, the spin of SgrA$^*$ must be small, suggesting that the models for its observed image are incomplete.}, added-at = {2022-05-26T06:42:59.000+0200}, author = {Fragione, Giacomo and Loeb, Abraham}, biburl = {https://www.bibsonomy.org/bibtex/22218469628be315759ad410828d53b01/citekhatri}, description = {Implication of spin constraints by the Event Horizon Telescope on stellar orbits in the Galactic Center}, interhash = {a217d3388e78261d7aee7d791a79fb24}, intrahash = {2218469628be315759ad410828d53b01}, keywords = {tifr}, note = {cite arxiv:2205.12274Comment: 4 pages, 3 figures}, timestamp = {2022-05-26T06:42:59.000+0200}, title = {Implication of spin constraints by the Event Horizon Telescope on stellar orbits in the Galactic Center}, url = {http://arxiv.org/abs/2205.12274}, year = 2022 }