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Kepler-424 B: A "Lonely" Hot Jupiter That Found A Companion
(2014-11)
Hot Jupiter systems provide unique observational constraints for migration models in multiple systems and binaries. We report on the discovery of the Kepler-424 (KOI-214) two-planet system, which consists of a transiting ...
The ACS Survey Of Galactic Globular Clusters. III. The Double Subgiant Branch Of NGC 1851
(2008-01)
Photometry with the Hubble Space Telescope Advanced Camera for Surveys (HSTACS) reveals that the subgiant branch (SGB) of the globular cluster NGC 1851 splits into two well-defined branches. If the split is due only to an ...
Transiting Exoplanets From The CoRoT Space Mission XXIV. CoRoT-25b and CoRoT-26b: two low-density giant planets
(2013-07)
We report the discovery of two transiting exoplanets, CoRoT-25b and CoRoT-26b, both of low density, one of which is in the Saturn mass-regime. For each star, ground-based complementary observations through optical photometry ...
Evidence For A Correlation Between The Si II Lambda 4000 Width And Type Ia Supernova Color
(2011-06)
We study the pseudo-equivalent width of the Si II lambda 4000 feature of Type Ia supernovae (SNe Ia) in the redshift range 0.0024 <= z <= 0.634. We find that this spectral indicator correlates with the light curve color ...
The Hot R Coronae Borealis Star DY Centauri is a Binary
(2012-11)
The remarkable hot R Coronae Borealis (RCB) star DY Cen is revealed to be the first and only binary system to be found among the RCB stars and their likely relatives, including the extreme helium stars and the hydrogen-deficient ...
The Stellar Content Of The Hamburg/ESO Survey V. The Metallicity Distribution Function Of The Galactic Halo
(2009-11)
We determine the metallicity distribution function (MDF) of the Galactic halo by means of a sample of 1638 metal-poor stars selected from the Hamburg/ESO objective-prism survey (HES). The sample was corrected for minor ...
SDSS J184037.78+642312.3: the First Pulsating Extremely Low Mass White Dwarf
(2012-05)
We report the discovery of the first pulsating extremely low mass (ELM) white dwarf (WD), SDSS J184037.78+642312.3 (hereafter J1840). This DA (hydrogen-atmosphere) WD is by far the coolest and the lowest-mass pulsating WD, ...
Kepler-15B: A Hot Jupiter Enriched in Heavy Elements and the First Kepler Mission Planet Confirmed With the Hobby-Eberly Telescope
(2011-11)
We report the discovery of Kepler-15b (KOI-128), a new transiting exoplanet detected by NASA's Kepler mission. The transit signal with a period of 4.94 days was detected in the quarter 1 (Q1) Kepler photometry. For the ...
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 ...