Snake in the Clouds: A new nearby dwarf galaxy in the Magellanic bridge
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Koposov, Sergey; Walker, Matthew G; Belokurov, Vasily; Casey, Andrew; Geringer-Sameth, Alex; Mackey, Dougal; Da Costa, Gary; Erkal, D.; Jethwa, Prashin; Mateo, Mario; Olszewski, Edward W; Bailey III, J. I.
Description
We report the discovery of a nearby dwarf galaxy in the constellation of Hydrus, between the Large (LMC) and the Small Magellanic Clouds (SMC). Hydrus 1 is a mildly elliptical ultrafaint system with luminosity MV ~-4.7 and size 53 ± 3 pc, located 28 kpc from the Sun and 24 kpc from the LMC. From spectroscopy of ~30 member stars, we measure a velocity dispersion of 2.7 ± 0.5 kms-1 and find tentative evidence for a radial velocity gradient consistent with 3 kms-1 rotation. Hydrus 1's velocity...[Show more]
Collections | ANU Research Publications |
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Date published: | 2018 |
Type: | Journal article |
URI: | http://hdl.handle.net/1885/254498 |
Source: | Monthly Notices of the Royal Astronomical Society |
DOI: | 10.1093/mnras/sty1772 |
Access Rights: | Open Access |
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01_Koposov_Snake_in_the_Clouds%3A_A_new_2018.pdf | 2.33 MB | Adobe PDF |
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