A New Cold Stream near the Southern Galactic Pole
نویسندگان
چکیده
Abstract We report the discovery of a cold stream near southern Galactic pole (dubbed as SGP-S) detected in Gaia Early Data Release 3. The is at heliocentric distance ?9.5 kpc and spans nearly 58° by 0.°6 on sky. color–magnitude diagram SGP-S indicates an old metal-poor (age ?12 Gyr, [M/H] ? ?2.0 dex) stellar population. stream’s surface brightness reaches exceedingly low level ? G ? 36.2 mag arcsec ?2 . Neither extant globular clusters nor other known streams are associated with SGP-S.
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ژورنال
عنوان ژورنال: The astrophysical journal
سال: 2022
ISSN: ['2041-8213', '2041-8205']
DOI: https://doi.org/10.3847/2041-8213/ac853c