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Kinematic and metallicity properties od the Aquarius dwarf galaxy from FORS2 MXU spectroscopy
L. Hermosa Muñoz, S. Taibi, G. Battaglia +10
Dwarf galaxies found in isolation in the Local Group (LG) are unlikely to have interacted with the large LG spirals, and therefore environmental effects should not be the main driv…
Star formation at the edge of the Local Group: a rising star formation history in the isolated galaxy WLM
Saundra M. Albers, Daniel R. Weisz, Andrew A. Cole +11
We present the star formation history (SFH) of the isolated (D~970 kpc) Local Group dwarf galaxy WLM measured from color-magnitude diagrams constructed from deep Hubble Space Teles…
Keck Observations Confirm a Super-Jupiter Planet Orbiting M-dwarf OGLE-2005-BLG-071L
David P. Bennett, Aparna Bhattacharya, Jean-Philippe Beaulieu +10
We present adaptive optics imaging from the NIRC2 instrument on the Keck-2 telescope that resolves the exoplanet host (and lens) star as it separates from the brighter source star.…
Revisiting MOA 2013 BLG-220L: A Solar-type star with a Cold super-Jupiter Companion
Aikaterini Vandorou, David P. Bennett, Jean-Philippe Beaulieu +7
We present the analysis of high-resolution images of MOA-2013-BLG-220, taken with the Keck adaptive optics system 6 years after the initial observation, identifying the lens as a s…
OGLE-2017-BLG-1186: first application of asteroseismology and Gaussian processes to microlensing
Shun-Sheng Li, Weicheng Zang, Andrzej Udalski +102
We present the analysis of the event OGLE-2017-BLG-1186 from the 2017 Spitzer microlensing campaign. This is a remarkable microlensing event because its source is photometrically b…
Pluto's lower atmosphere and pressure evolution from ground-based stellar occultations, 1988-2016
E. Meza, B. Sicardy, M. Assafin +167
Context. Pluto's tenuous nitrogen (N2) atmosphere undergoes strong seasonal effects due to high obliquity and orbital eccentricity, and has been recently (July 2015) observed by th…