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Radio Interferometric Planet Search II: Constraints on sub-Jupiter-Mass Companions to GJ 896A
Interferometric Planet Constraints sub-Jupit
2011/10/10
We present results from the Radio Interferometric Planet (RIPL) search for compan- ions to the nearby star GJ 896A. We present 11 observations over 4.9 years. Fitting astrometric parameters to the dat...
VHE gamma-ray Emission from Passive Supermassive Black Holes: Constraints for NGC 1399
Emission Passive Supermassive Black Holes
2011/9/28
Very high energy (VHE; >100 GeV) gamma-rays are expected to be emitted from the vicinity of super-massive black holes (SMBH), irrespective of their activity state. In the magnetosphere of rotating SMB...
System parameters, transit times and secondary eclipse constraints of the exoplanet systems HAT-P-4, TrES-2, TrES-3 and WASP-3 from the NASA EPOXI Mission of Opportunity
planetary systems — eclipses — stars individual (HAT-P-4
2010/11/12
As part of the NASA EPOXI Mission of Opportunity, we observed seven known transiting extrasolar planet systems in order to construct time series photometry of extremely high phase coverage and precisi...
Reionization constraints using Principal Component Analysis
dark ages reionization first stars intergalactic medium cosmology
2010/11/12
Using a semi-analytical model developed by Choudhury & Ferrara (2005) we study the observational
constraints on reionization via a principal component analysis (PCA). Assuming
that reionization at z...
Constraints on the Assembly and Dynamics of Galaxies: I. Detailed Rest-frame Optical Morphologies on Kiloparsec-scale of z ~ 2 Star-forming Galaxies
galaxies evolution galaxies high-redshift galaxies kinematics and dynamics
2010/11/11
We present deep and high-resolution Hubble Space Telescope NIC2 F160W imaging at 1.6 μm of six z 2 star-forming galaxies with existing near-infrared integral field spectroscopy from SINFONI at the V...
(No) dynamical constraints on the mass of the black hole in two ULXs
accretion accretion discs – X-rays binaries – black hole physics – binaries spectroscopic
2010/11/12
We present the preliminary results of two Gemini campaigns to constrain the mass of the black hole in an ultraluminous X-ray source (ULX) via optical spectroscopy. Pilot studies of the optical counter...