Results 121 to 130 of about 3,279 (221)

Observations of Exoplanet Atmospheres

, 2018
The focus of this thesis is the observation of extrasolar planet atmospheres. Our research utilizes a variety of telescopes and analysis techniques to observe planets with a variety of properties.
Esteves, Lisa Jean Noemia Ing
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Helium in the Extended Atmosphere of the Warm Superpuff TOI-1420b

The Astronomical Journal
Superpuffs are planets with exceptionally low densities ( ρ ≲ 0.1 g cm ^−3 ) and core masses ( M _c ≲ 5 M _⊕ ). Many lower-mass ( M _p ≲ 10 M _⊕ ) superpuffs are expected to be unstable to catastrophic mass loss via photoevaporation and/or boil-off ...
Shreyas Vissapragada, Michael Greklek-McKeon, Dion Linssen, Morgan MacLeod, Daniel P. Thorngren, Peter Gao, Heather A. Knutson, David W. Latham, Mercedes López-Morales, Antonija Oklopčić, Jorge Pérez González, Morgan Saidel, Abigail Tumborang, Stephanie Yoshida   +13 more
doaj   +1 more source

Unique data reduction methodology to obtain full resolution spectra of exoplanet atmospheres observed using the Hubble Space Telescope in stare mode

, 2018
Transit spectroscopy was the method by which the existence of exoplanet atmospheres was definitely established (Charboneau et al. 2002) and the molecular composition first probed (Tinetti et al. 2007, Swain et al. 2008).
Rowen, Amanda
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Circumplanetary disk ices : I. Ice formation vs. viscous evolution and grain drift [PDF]

Funding: The research of N.O. and I.K. is supported by grants from the Netherlands Organization for Scientific Research (NWO, grant number 614.001.552) and the Netherlands Research School for Astronomy (NOVA).Context .
Kamp, I., Oberg, N., Woitke, P., Thi, W. F., Cazaux, S.   +4 more
core   +1 more source

On the interaction between embedded planets and the corotation region of protoplanetary discs [PDF]

, 2015
PhDDisc material in the corotation region librates with respect to low-mass planets on horseshoe trajectories. The exchange of angular momentum associated with this libration gives rise to the non-linear corotation torque (the horseshoe drag).
Fendyke, Stephen
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Search for exoplanet around northern circumpolar stars

, 2015
Aims. This program originated as the north pole region extension of the established exoplanet survey using the 1.8 m telescope at Bohyunsan Optical Astronomy Observatory (BOAO).

core   +1 more source

Characterizing the Exoplanet Population Around Mid-to-Late M Dwarfs [PDF]

Around Sun-like stars and early M dwarfs alike, super-Earths and sub-Neptunes form a bimodal distribution separated by a dearth of planets between 1.6 and 1.9 Earth radii known as the radius valley. Modeling these planet populations and the radius valley
Gillis, Erik
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Hide and seek : radial-velocity searches for planets around active stars

, 2015
The detection of low-mass extra-solar planets through radial-velocity searches is currently limited by the intrinsic magnetic activity of the host stars.
Haywood, Raphaëlle D.
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The sub-Jupiter mass transiting exoplanet WASP-11b

, 2009
We report the discovery of a sub-Jupiter mass exoplanet transiting a magnitude V = 11.6 host star 1SWASP J030928.54+304024.7. A simultaneous fit to the transit photometry and radial-velocity measurements yield a planet mass Mp = 0.53 +/- 0.07 MJ, radius ...
Anderson, D., Christian, Damian J., Simpson, E.K., West, R.G., Bouchy, F., Wheatley, P.J., Hebb, L., Stempels, H.C., Enoch, B., Collier Cameron, A., Skillen, I., Pollacco, Don L., Joshi, Y.C., Bentley, S.J., Wilson, D.M.   +14 more
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Applications of photonic lanterns in exoplanet astronomy [PDF]

Though almost 6,000 confirmed exoplanets discovered to date, only $\sim$ 200 have measured atmospheric spectra, none of which resemble the Earth. Even though such planets, and by extension solar-system-like exoplanetary systems may be rare, at least ...
Lin, Jonathan
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