Archives

Extrasolar Planets: December 2013


Habitability around F-type Stars

We explore the general astrobiological significance of F-type main-sequence stars with masses between 1.2 and 1.5 Msun.

Most models used to predict or fit exoplanet transmission spectra do not include all the effects of atmospheric refraction.

To date, scientists have confirmed the existence of more than 900 exoplanets circulating outside our solar system.

Organic haze plays a key role in many planetary processes ranging from influencing the radiation budget of an atmosphere to serving as a source of prebiotic molecules on the surface.

The dissipation of the tidal energy deposited on eccentric planets may induce a heating of the planet that affects its atmospheric thermal structure.

Understanding a planet's atmosphere is a necessary condition for understanding not only the planet itself, but also its formation, structure, evolution, and habitability.

We present a new method to probe atmospheric pressure on Earthlike planets using (O2-O2) dimers in the near-infrared.

We review the state of the field of terrestrial planet formation with the goal of understanding the formation of the inner Solar System and low-mass exoplanets.

The habitable zone (HZ) around a star is typically defined as the region where a rocky planet can maintain liquid water on its surface.

Cosmic rays may be linked to the formation of volatiles necessary for prebiotic chemistry.

We present the results of simulations on the detectability of O2 in the atmosphere of Earth twins around nearby low mass stars using high resolution transmission spectroscopy.

We present narrow-band photometric measurements of the exoplanet GJ 1214b using the 10.4 m Gran Telescopio Canarias (GTC) and the OSIRIS instrument.

We study the masses and radii of 60 exoplanets smaller than 4 Earth radii with orbital periods shorter than 100 days.

Using the powerful eye of NASA's Hubble Space Telescope, two teams of scientists have found faint signatures of water in the atmospheres of five distant planets.