Proxima Centauri b

Calculations of Periodicity From Hα Profiles of Proxima Centauri

Calculations of Periodicity From Hα Profiles of Proxima Centauri

We investigate retrieval of the stellar rotation signal for Proxima Centauri. We make use of high-resolution spectra taken with uves and harps of Proxima Centauri over a 13-year period as well as photometric observations of Proxima Centauri from asas and hst.

Proxima Centauri b

Could Proxima Centauri b Really Be Habitable?

Could Proxima Centauri b Really Be Habitable?

The world's attention is now on Proxima Centauri b, a possibly Earth-like planet orbiting the closest star, 4.22 light-years away. The planet's orbit is just right to allow liquid water on its surface, needed for life. But could it in fact be habitable?

Astrochemistry

Formation of Ethylene Glycol and Other Complex Organic Molecules in Star-forming Regions

Formation of Ethylene Glycol and Other Complex Organic Molecules in Star-forming Regions

We study the molecular abundance and spatial distribution of the simplest sugar alcohol, ethylene glycol (EG), the simplest sugar glycoladehyde (GA), and other chemically related complex organic species towards the massive star-forming region G31.41+0.31.

Habitable Zones & Global Climate

Prospects for Characterizing the Atmosphere of Proxima Centauri b

Prospects for Characterizing the Atmosphere of Proxima Centauri b

The newly detected Earth-mass planet in the habitable zone of Proxima Centauri could potentially host life - if it has an atmosphere that supports surface liquid water.

Extrasolar Planets

A Catalog of Kepler Habitable Zone Exoplanet Candidates

A Catalog of Kepler Habitable Zone Exoplanet Candidates

The NASA Kepler mission has discovered thousands of new planetary candidates, many of which have been confirmed through follow-up observations. A primary goal of the mission is to determine the occurrance rate of terrestrial-size planets within the Habitable Zone (HZ) of their host stars. Here we provide a list of HZ exoplanet candidates from the Kepler Data Release 24 Q1-Q17 data vetting process.

Astrochemistry

Search for HOOH in Orion

Search for HOOH in Orion

The abundance of key molecules determines the level of cooling that is necessary for the formation of stars and planetary systems. In this context, one needs to understand the details of the time dependent oxygen chemistry, leading to the formation of molecular oxygen and water.

Extrasolar Planets

Terrestrial-type Planet Formation: Comparing Different Types of Initial Conditions

Terrestrial-type Planet Formation: Comparing Different Types of Initial Conditions

To study the terrestrial-type planet formation during the post oligarchic growth, the initial distributions of planetary embryos and planetesimals used in N-body simulations play an important role. Most of these studies typically use ad hoc initial distributions based on theoretical and numerical studies.

Proxima Centauri b

Tutorial Models of the Climate and Habitability of Proxima Centauri b

Tutorial Models of the Climate and Habitability of Proxima Centauri b

Proxima Centauri b, an Earth-size planet in the habitable zone of our nearest stellar neighbour, has just been discovered. A theoretical framework of synchronously rotating planets, in which the risk of a runaway greenhouse on the sunlight side and atmospheric collapse on the reverse side are mutually ameliorated via heat transport is discussed.

Enceladus

Acoustic Properties of Glacial ice for Neutrino Detection and the Enceladus Explorer

Acoustic Properties of Glacial ice for Neutrino Detection and the Enceladus Explorer

Ultra high energy neutrinos may be observed in ice by the emission of acoustic signals. The SPATS detector has investigated the possibility of observing GZK-neutrinos in the clear ice near the South Pole at the IceCube detector site. To explore other potential detection sites glacial ice in the Alps and in Antarctica has been surveyed for its acoustical properties

Extrasolar Planets

New Indexing and Surface Temperature Analysis of Exoplanets

New Indexing and Surface Temperature Analysis of Exoplanets

Study of exoplanets is the holy grail of present research in planetary sciences and astrobiology. Analysis of huge planetary data from space missions such as CoRoT and Kepler is directed ultimately at finding a planet similar to Earth\-the Earth's twin, and answering the question of potential exo-habitability.

Biosignatures & Paleobiology

Biological Fluorescence as a Temporal Biosignature for Flare Star Worlds

Biological Fluorescence as a Temporal Biosignature for Flare Star Worlds

Habitability for planets orbiting active stars has been questioned. Especially, planets in the Habitable Zone (HZ) of M-stars, like our closest star Proxima Centauri, experience temporal high-ultraviolet (UV) radiation.

More top stories from August.