Matches in SemOpenAlex for { <https://semopenalex.org/work/W4310291405> ?p ?o ?g. }
- W4310291405 endingPage "127" @default.
- W4310291405 startingPage "127" @default.
- W4310291405 abstract "We report the discovery of Specter, a disrupted ultrafaint dwarf galaxy revealed by the H3 Spectroscopic Survey. We detected this structure via a pair of comoving metal-poor stars at a distance of 12.5 kpc, and further characterized it with Gaia astrometry and follow-up spectroscopy. Specter is a $25^circ times 1^circ$ stream of stars that is entirely invisible until strict kinematic cuts are applied to remove the Galactic foreground. The spectroscopic members suggest a stellar age $tau gtrsim 12$ Gyr and a mean metallicity $langletext{[Fe/H]}rangle = -1.84_{-0.18}^{+0.16}$, with a significant intrinsic metallicity dispersion $sigma_{ text{[Fe/H]}} = 0.37_{-0.13}^{+0.21}$. We therefore argue that Specter is the disrupted remnant of an ancient dwarf galaxy. With an integrated luminosity $M_{text{V}} approx -2.6$, Specter is by far the least-luminous dwarf galaxy stream known. We estimate that dozens of similar streams are lurking below the detection threshold of current search techniques, and conclude that spectroscopic surveys offer a novel means to identify extremely low surface brightness structures." @default.
- W4310291405 created "2022-11-30" @default.
- W4310291405 creator A5014198619 @default.
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- W4310291405 creator A5090020735 @default.
- W4310291405 date "2022-11-29" @default.
- W4310291405 modified "2023-10-04" @default.
- W4310291405 title "A Ghost in Boötes: The Least-Luminous Disrupted Dwarf Galaxy" @default.
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