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Discovery of a Dynamical Cold Point in the Heart of the Sagittarius dSph Galaxy With Observations from the APOGEE Project
(2013-11)
The dynamics of the core of the Sagittarius (Sgr) dwarf spheroidal (dSph) galaxy are explored using high-resolution (R similar to 22,500), H-band, near-infrared spectra of over 1000 giant stars in the central 3 deg(2) of ...
The Vega Debris Disc: A View From Herschel
(2010)
We present five band imaging of the Vega debris disc obtained using the Herschel Space Observatory. These data span a wavelength range of 70-500 mu m with full-width half-maximum angular resolutions of 5.6-36.9 ''. The ...
Two New Tidally Distorted White Dwarfs
(2012-04)
We identify two new tidally distorted white dwarfs (WDs), SDSS J174140.49+652638.7 and J211921.96-001825.8 (hereafter J1741 and J2119). Both stars are extremely low mass (ELM, <= 0.2 M-circle dot)WDs in short-period, ...
Visitors from the Halo: 11 Gyr Old White Dwarfs in the Solar Neighborhood
(2010-05)
We report the discovery of three nearby old halo white dwarf (WD) candidates in the Sloan Digital Sky Survey (SDSS), including two stars in a common proper motion binary system. These candidates are selected from our 2800 ...
Radius Constraints From High-Speed Photometry Of 20 Low-Mass White Dwarf Binaries
(2014-09)
We carry out high-speed photometry on 20 of the shortest-period, detached white dwarf binaries known and discover systems with eclipses, ellipsoidal variations (due to tidal deformations of the visible white dwarf), and ...
Transiting Exoplanets From The CoRoT Space Mission XVII. The Hot Jupiter CoRoT-17B: A Very Old Planet
(2011-07)
We report on the discovery of a hot Jupiter-type exoplanet, CoRoT-17b, detected by the CoRoT satellite. It has a mass of 2.43 +/- 0.30 M-Jup and a radius of 1.02 +/- 0.07 R-Jup, while its mean density is 2.82 +/- 0.38 ...
Herschel Observations of the T Cha Transition Disk: Constraining the Outer Disk Properties
(2011-11)
T Cha is a nearby (d similar to 100 pc) transition disk known to have an optically thin gap separating optically thick inner and outer disk components. Huelamo et al. recently reported the presence of a low-mass object ...
Discovery of an Ultramassive Pulsating White Dwarf
(2013-07)
We announce the discovery of the most massive pulsating hydrogen-atmosphere white dwarf (WD) ever discovered, GD 518. Model atmosphere fits to the optical spectrum of this star show it is a 12,030 +/- 210 K WD with a log ...
Herschel Images Of Fomalhaut An Extrasolar Kuiper Belt At The Height Of Its Dynamical Activity
(2012-04)
Context. Fomalhaut is a young (2 +/- 1 x 10(8) years), nearby (7.7 pc), 2 M-circle dot star that is suspected to harbor an infant planetary system, interspersed with one or more belts of dusty debris. Aims. We present ...
Transiting Exoplanets From The CoRoT Space Mission XVII. The Hot Jupiter CoRoT-17B: A Very Old Planet
(2011-07)
We report on the discovery of a hot Jupiter-type exoplanet, CoRoT-17b, detected by the CoRoT satellite. It has a mass of 2.43 +/- 0.30 M-Jup and a radius of 1.02 +/- 0.07 R-Jup, while its mean density is 2.82 +/- 0.38 ...