Results 61 to 70 of about 21,946 (214)

Relationship between Luminosity, Irradiance and Temperature of star on the orbital parameters of exoplanets

open access: yesEPJ Web of Conferences, 2013
For 759 exoplanets detected by radial velocities method we found that distances of exoplanets from central star comply in general Schmidt law and these distances depend on the stellar surface temperature.
Pavel Pintr
doaj   +1 more source

Assessing the Possibility of Biological Complexity on Other Worlds, with an Estimate of the Occurrence of Complex Life in the Milky Way Galaxy

open access: yesChallenges, 2014
Rational speculation about biological evolution on other worlds is one of the outstanding challenges in astrobiology. With the growing confirmation that multiplanetary systems abound in the universe, the prospect that life occurs redundantly throughout ...
Louis N. Irwin   +3 more
doaj   +1 more source

On Our Cosmic (In)significance

open access: yesRatio, EarlyView.
ABSTRACT This article discusses three interpretations of cosmic significance, all of which reveal something important about the notion of significance. Along the way, it proposes a unified view of significance by combining elements of each of the views.
Oskari Sivula
wiley   +1 more source

Shaping of Planetary Nebulae by Exoplanets

open access: yesGalaxies, 2020
(1) Background: We investigate the hypothesis that exoplanet engulfment can help explain the observed non-spherical planetary nebula population, as a complementary shaping mechanism to the binary hypothesis.
Nicola Keaveney   +2 more
doaj   +1 more source

ExoPhot: The Photon Absorption Rate as a New Metric for Quantifying the Exoplanetary Photosynthetic Activity Fitness

open access: yesUniverse, 2022
Only a low percentage of the radiation from our Sun is captured by photosynthesis, but this conversion of solar to chemical energy sustains all life on Earth.
Pablo Marcos-Arenal   +7 more
doaj   +1 more source

Future exoplanet space missions: Spectroscopy and coronographic imaging

open access: yes, 2018
The spectroscopy of exoplanet atmospheres as well as the direct detection of exoplanets using coronographic techniques is best done using space-based facilities.
Liseau, Ren\ue9   +5 more
core   +1 more source

Microlensed Radio Emission from Exoplanets [PDF]

open access: yes, 2020
In this paper, we investigate the detectability of radio emission from exoplanets, especially hot Jupiters, which are magnified by gravitational microlensing.
Takahashi, Keitaro   +4 more
core   +1 more source

Doppler-Shifted Alkali D Absorption as Indirect Evidence for Exomoons

open access: yesFrontiers in Astronomy and Space Sciences, 2022
Sodium and potassium signatures in transiting exoplanets can be challenging to isolate from the stellar absorption lines. Here, these challenges are discussed in the framework of Solar System observations, and transits of Mercury in particular. Radiation
Carl A. Schmidt
doaj   +1 more source

VaTEST. II. Statistical Validation of 11 TESS-detected Exoplanets Orbiting K-type Stars

open access: yesThe Astronomical Journal, 2023
NASA’s Transiting Exoplanet Survey Satellite (TESS) is an all-sky survey mission designed to find transiting exoplanets orbiting nearby bright stars. It has identified more than 329 transiting exoplanets, and almost 6000 candidates remain unvalidated. In
Priyashkumar Mistry   +50 more
doaj   +1 more source

The Census of Exoplanets in Visual Binaries: Population Trends from a Volume-Limited Gaia DR2 and Literature Search

open access: yesFrontiers in Astronomy and Space Sciences, 2021
We present results from an extensive search in the literature and Gaia DR2 for visual co-moving binary companions to stars hosting exoplanets and brown dwarfs within 200 pc.
Clémence Fontanive   +1 more
doaj   +1 more source

Home - About - Disclaimer - Privacy