期刊
ASTROPHYSICAL JOURNAL LETTERS
卷 712, 期 1, 页码 L103-L106出版社
IOP PUBLISHING LTD
DOI: 10.1088/2041-8205/712/1/L103
关键词
galaxies: dwarf; galaxies: individual (Pisces, Pegasus); Local Group
资金
- Alfred P. Sloan Foundation
- Participating Institutions
- National Science Foundation
- U.S. Department of Energy
- National Aeronautics and Space Administration
- Japanese Monbukagakusho
- Max Planck Society
- Higher Education Funding Council for England
- Royal Society
- Science and Technology Facilities Council of the UK
- NSF [AST-0807498, AST-0808043]
- Science and Technology Facilities Council [ST/H00243X/1, PP/C002229/1, PP/E001068/1, ST/H004157/1, ST/H001913/1, PP/E00105X/1, ST/H004165/1] Funding Source: researchfish
- Division Of Astronomical Sciences
- Direct For Mathematical & Physical Scien [0808043] Funding Source: National Science Foundation
- Division Of Astronomical Sciences
- Direct For Mathematical & Physical Scien [807498] Funding Source: National Science Foundation
- STFC [ST/H004165/1, PP/E00105X/1, PP/C002229/1, PP/E001068/1, ST/H001913/1, ST/H004157/1] Funding Source: UKRI
We report the discovery of two new Milky Way satellites in the neighboring constellations of Pisces and Pegasus identified in data from the Sloan Digital Sky Survey. Pisces II, an ultra-faint dwarf galaxy lies at the distance of similar to 180 kpc, some 15 degrees away from the recently detected Pisces I. Segue 3, an ultra-faint star cluster lies at the distance of 16 kpc. We use deep follow-up imaging obtained with the 4-m Mayall Telescope at Kitt Peak National Observatory to derive their structural parameters. Pisces II has a half-light radius of similar to 60 pc, while Segue 3 is 20 times smaller at only 3 pc.
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