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NASA selects Penn State to lead next-generation planet finder
NASA Penn State lead next-generation planet finder
2016/4/13
A Penn State-led research group has been selected by NASA's Astrophysics Division to build a $10-million, cutting-edge instrument to detect planets orbiting stars outside our solar system. The team, l...
Planet-sized 'virtual telescope' expands to the South Pole to observe black holes in detail
Planet-sized virtual telescope South Pole to observe black holes
2015/4/29
B-roll of the South Pole Telescope is available from NSF's Dena Headlee, dheadlee@nsf.gov / (703) 292-7739.Astronomers building a globe-spanning virtual telescope capable of photographing the "event h...
Second-generation microlensing planet surveys: a realistic simulation
surveys – gravitational lensing: micro – methods: statistical – binaries: general – planetary systems – Galaxy: stellar content
2011/10/20
Microlensing surveys, which have discovered about a dozen extrasolar planets to date, have focused on the small minority of high-magnification lensing events, which have a high sensitivity to planet d...
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...
Giant Planet Formation by Disk Instability in Low Mass Disks?
Giant Planet Formation Disk Instability Low Mass Disks
2011/1/11
Forming giant planets by disk instability requires a gaseous disk that is massive enough to become gravitationally unstable and able to cool fast enough for self-gravitating clumps to form and survive...
The role of the initial surface density profiles of the disc on giant planet formation: comparing with observations
the initial surface density profiles the disc on giant planet formation
2011/1/10
In order to explain the main characteristics of the observed population of extrasolar planets and the giant planets in the Solar System, we need to get a clear understanding of which are the initial c...
A search for Star-Planet-Interactions in the upsilon Andromedae system at X-ray and optical wavelengths
Star-Planet-Interactions the upsilon Andromedae system
2011/1/11
Close-in, giant planets are expected to influence their host stars via tidal or magnetic interaction. But are these effects strong enough in suitable targets known so far to be observed with today's i...
HD 46375: seismic and spectropolarimetric analysis of a young Sun hosting a Saturn-like planet
seismic spectropolarimetric analysis Saturn-like planet
2010/11/15
Context. HD 46375 is known to host a Saturn-like exoplanet orbiting at 0.04 AU from its host star. Stellar light reflected by the planet was tentatively identified in the 34-day CoRoT run acquired in ...
The NASA-UC Eta-Earth Program: III. A Super-Earth orbiting HD 97658 and a Neptune-mass planet orbiting Gl 785
planetary systems stars individual techniques radial velocity
2010/11/9
We report the discovery of planets orbiting two bright, nearby early K dwarf stars, HD97658 and
Gl 785. These planets were detected by Keplerian modelling of radial velocities measured with Keck-HIRE...
Runaway Growth During Planet Formation: Explaining the Size Distribution of Large Kuiper Belt Objects
circumstellar matter Kuiper belt planetary systems general planets and satellites
2010/11/9
Runway growth is an important stage in planet formation during which large protoplanets form,
while most of the initial mass remains in small planetesimals. The amount of mass converted into large pr...
The radius anomaly in the planet/brown dwarf overlapping mass regime
radius anomaly mass regime
2010/11/9
The recent detection of the transit of very massive substellar companions (Deleuil et al. 2008; Bouchy et al. 2010;Anderson et al. 2010; Bakos et al. 2010) provides a strong con-
straint to planet an...
Possible detection of phase changes from the non-transiting planet HD 46375b by CoRoT
Stars:planetary systems Techniques: photometric Methods: data analysis Stars: individual HD 46375
2010/11/15
Context. The present work deals with the detection of phase changes in an exoplanetary system. HD 46375 is a solar analog known to host a non-transiting Saturn-mass exoplanet with a 3.0236 day period....
Retrograde Hot Jupiters from Secular Planet-Planet Interactions
Retrograde Hot Jupiters Secular Planet-Planet Interactions
2010/11/15
The search for extra-solar planets has led to the surprising discovery of many Jupiter-like planets in very close proximity to their host star1, the so-called “hot Jupiters.”
High-resolution spectroscopic view of planet formation sites
planetary systems protoplanetary disks hydrodynamics line pro les
2010/11/15
Theories of planet formation predict the birth of giant planets in the inner, dense, and
gas-rich regions of the circumstellar disks around young stars. These are the regions from which strong CO emi...
The effect of M dwarf starspot activity on low-mass planet detection thresholds
planetary systems stars activity stars atmospheres stars spots techniques
2010/11/11
In light of the growing interest in searching for low mass, rocky planets, we investigate the
impact of starspots on radial velocity searches for earth-mass planets in orbit about M dwarf
stars. Sin...