A Pair of Bootes: A New Milky Way Satellite
S.M. Walsh, H. Jerjen, B. Willman

TL;DR
This paper reports the discovery of a new faint Milky Way satellite near Boötes, identified through data mining of SDSS data, characterized as an old, metal-poor stellar system with properties between globular clusters and dwarf galaxies.
Contribution
It introduces a new Milky Way satellite discovered via a data mining algorithm in SDSS data, expanding knowledge of faint galactic satellites.
Findings
Discovered a new stellar overdensity near Boötes.
Estimated the satellite's magnitude and size, placing it between globular clusters and dwarf galaxies.
Confirmed the stellar population as old and metal-poor.
Abstract
As part of preparations for a southern sky search for faint Milky Way dwarf galaxy satellites, we report the discovery of a stellar overdensity in the Sloan Digital Sky Survey Data Release 5, lying at an angular distance of only 1.5 degrees from the recently discovered Bo{\"o}tes dwarf. The overdensity was detected well above statistical noise by employing a sophisticated data mining algorithm and does not correspond to any catalogued object. Overlaid isochrones using stellar population synthesis models show that the color-magnitude diagram of that region has the signature of an old (12 Gyr), metal-poor () stellar population at a tentative distance of 60 kpc, evidently the same heliocentric distance as the Bo\"otes dwarf. We estimate the new object to have a total magnitude of mag and a half-light radius of ( pc)…
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