Results 51 to 60 of about 16,468 (216)

The Influence of Galactic Cosmic Rays on Ion-Neutral Hydrocarbon Chemistry in the Upper Atmospheres of Free-Floating Exoplanets [PDF]

, 1989
Cosmic rays may be linked to the formation of volatiles necessary for prebiotic chemistry. We explore the effect of cosmic rays in a hydrogen-dominated atmosphere, as a proof-of-concept that ion-neutral chemistry may be important for modelling hydrogen ...
C. Bilger, Ch. Helling, Miller, P. B. Rimmer, Rimmer, Skilling   +5 more
core   +3 more sources

"Retired" Planet Hosts: Not So Massive, Maybe Just Portly After Lunch

, 2011
Studies of the planet abundance as a function of stellar mass have suggested a strong increase in the frequency of planet occurrence around stars more massive than $1.5 M_\odot$, and that such stars are deficit in short period planets.
Allende Prieto, Ayres, Baines, Bowler, Cassisi, Cassisi, Charbonnel, Crepp, Eggleton, Fischer, Glebocki, Hansen, Johnson, Johnson, Kane, Kim, Matsumura, McCarthy, Paxton, Penev, Reffert, Schlawin, Seager, Takeda, Valenti, van Belle, Villaver, Yi   +27 more
core   +1 more source

The Architectural Design Rules of Solar Systems based on the New Perspective

, 2009
On the basis of the Lunar Laser Ranging Data released by NASA on the Silver Jubilee Celebration of Man Landing on Moon on 21st July 1969-1994, theoretical formulation of Earth-Moon tidal interaction was carried out and Planetary Satellite Dynamics was ...
A Johnson, AN Halliday, Bijay Kumar Sharma, BK Sharma, C Broeg, C Hellier, CL Cook, D Apes, DD Sasselov, DD Sasselov, DP Rubicam, F Marzari, G Israelian, GA Krasinsky, GA Krasinsky, GE Williams, GH Darwin, GH Darwin, H Tanaka, JE Chambers, JJ Dukla, JJ Lissauer, JP Zahn, KJ Epstein, M Reidemeister, ME Zolansky, N Murray, NC Santos, P Goldreich, RP Nelson, S Ida, S Leschiutta, SN Cuzzi, T Jong de   +33 more
core   +1 more source

The CoRoT Exoplanet program : status & results [PDF]

, 2011
The CoRoT satellite is the first instrument hunting for planets from space. We will review the status of the CoRoT/Exoplanet program. We will then present the CoRoT exoplanetary systems and how they widen the range of properties of the close-in ...
Bordé, P., Deleuil, M., Moutou, C., team, the CoRoT exoplanet science   +3 more
core   +2 more sources

Characterization of exoplanet hosts [PDF]

EPJ Web of Conferences, 2013
Spectroscopic analysis of exoplanet hosts and the stellar sample from which they are drawn provides abundances and other properties that quantitively constrain models of planet formation. The program Spectroscopy Made Easy (SME) determines stellar parameters by fitting observed spectra, though line lists must be selected wisely.
openaire   +2 more sources

Neuromorphic Computing with Memcapacitors: Advancements, Challenges, and Future Directions

Advanced Electronic Materials, EarlyView.
Neuromorphic computing reduces energy costs by integrating memory and processing in event‐driven architectures, achieving energy usage as low as 10–30 pJ per operation for memcapacitor‐based synapses. Memcapacitors are reviewed as strong contenders for neuromorphic computing, enhancing AI acceleration through charge‐based computations, high resistance,
Nada AbuHamra, Muhammad Umair Khan, Eman Hassan, Mahmoud Al Qutayri, Baker Mohammad   +4 more
wiley   +1 more source

Mapping out the time-evolution of exoplanet processes [PDF]

, 2019
There are many competing theories and models describing the formation, migration and evolution of exoplanet systems. As both the precision with which we can characterize exoplanets and their host stars, and the number of systems for which we can make ...
Beichman, Charles, Christiansen, Jessie L., Ciardi, David R., Huber, Daniel, Marley, Mark S.   +4 more
core   +1 more source

Kepler-1656b: a Dense Sub-Saturn With an Extreme Eccentricity [PDF]

, 2018
Kepler-1656b is a 5 $R_E$ planet with an orbital period of 32 days initially detected by the prime Kepler mission. We obtained precision radial velocities of Kepler-1656 with Keck/HIRES in order to confirm the planet and to characterize its mass and ...
Brady, Madison T., Fulton, Benjamin J., Hirsch, Lea A., Howard, Andrew W., Isaacson, Howard, Knutson, Heather A., Kosiarek, Molly R., Petigura, Erik A., Sinukoff, Evan   +8 more
core   +2 more sources

Formation of Ultra-short-period Planets in Hot Jupiter Systems: Application to WASP-47

The Astrophysical Journal Letters
The WASP-47 system is notable as the first known system hosting both inner and outer low-mass planetary companions around a hot Jupiter, with an ultra-short-period (USP) planet as the innermost planetary companion.
Su Wang, Mengrui Pan, Yao Dong, Gang Zhao, Jianghui Ji   +4 more
doaj   +1 more source

A Population of Very-Hot Super-Earths in Multiple-Planet Systems Should be Uncovered by Kepler

, 2010
We simulate a Kepler-like observation of a theoretical exoplanet population and we show that the observed orbital period distribution of the Kepler giant planet candidates is best matched by an average stellar specific dissipation function Q_* in the ...
Batalha, Batalha, Borucki, Bryson, Caldwell, Dobbs-Dixon, Ford, Fortney, Gu, Haas, Ibgui, Ida, Ida, Ida, Jackson, Jackson, Jackson, Jenkins, Jenkins, Koch, Levrard, Mardling, Masset, Miller, Ogihara, Ogilvie, Ogilvie, Reid, Rocha-Pinto, Rocha-Pinto, Sandquist, Schlaufman, Schlaufman, Seager, Winn   +34 more
core   +1 more source