Results 11 to 20 of about 10,001 (169)
An extrasolar planetary system with three Neptune-mass planets [PDF]
Nature, 2006 Over the past two years, the search for low-mass extrasolar planets has led to the detection of seven so-called ‘hot Neptunes’ or ‘super-Earths’ around Sun-like stars.
C. Lovis +13 more
semanticscholar +3 more sources
Combining high-dispersion spectroscopy with high contrast imaging : Probing rocky planets around our nearest neighbors [PDF]
, 2015 Context. Ground-based high-dispersion (R 100,000) spectroscopy (HDS) is proving to be a powerful technique with which to characterize extrasolar planets.
I. Snellen +8 more
semanticscholar +1 more source
The Carbon-deficient Evolution of TRAPPIST-1c
The Astrophysical Journal, 2023 Transiting planets orbiting M dwarfs provide the best opportunity to study the atmospheres of rocky planets with current facilities. As JWST enters its second year of science operations, an important initial endeavor is to determine whether these rocky ...
Katie E. Teixeira +3 more
doaj +1 more source
Can there be additional rocky planets in the Habitable Zone of tight binary stars with a known gas giant [PDF]
, 2015 Locating planets in Habitable Zones (HZs) around other stars is a growing field in contemporary astronomy. Since a large percentage of all G-M stars in the solar neighborhood are expected to be part of binary or multiple stellar systems, investigations ...
B. Funk, E. Pilat-Lohinger, S. Eggl
semanticscholar +1 more source
Atomic-scale mixing between MgO and H2O in the deep interiors of water-rich planets
Nature Astronomy, 2021 Water-rich planets exist in our Solar System (Uranus and Neptune) and are found to be common in the extrasolar systems (some of the sub-Neptunes). In conventional models of these planets a thick water-rich layer is underlain by a separate rocky interior.
Taehyun Kim +8 more
semanticscholar +1 more source
Alternative Methylated Biosignatures. I. Methyl Bromide, a Capstone Biosignature
The Astrophysical Journal, 2022 The first potential exoplanetary biosignature detections are likely to be ambiguous due to the potential for false positives: abiotic planetary processes that produce observables similar to those anticipated from a global biosphere.
Michaela Leung +3 more
doaj +1 more source
IMPACT OF ηEarth ON THE CAPABILITIES OF AFFORDABLE SPACE MISSIONS TO DETECT BIOSIGNATURES ON EXTRASOLAR PLANETS [PDF]
, 2015 We present an analytic model to estimate the capabilities of space missions dedicated to the search for biosignatures in the atmosphere of rocky planets located in the habitable zone of nearby stars.
A. Léger +4 more
semanticscholar +1 more source
Geophysical Research Letters, Volume 50, Issue 5, 16 March 2023., 2023 Abstract Although high pressure enables alloying between hydrogen and iron, hydrogen‐to‐iron molar ratio (H/Fe) so far found in experiments is mostly limited to 1 in the close‐packed iron metal under high pressure. We report a H/(Fe + Ni) ratio of 1.8 ± 0.1 from (Fe,Ni)Hx (or x ≥ 1.8) quenched from liquid, exceeding the amounts so far reported for ...
Hélène Piet +7 more
wiley +1 more source
WIREs Data Mining and Knowledge Discovery, Volume 12, Issue 5, September/October 2022., 2022 This work presents a text‐mining‐based scientometric analysis of the scientific output in the last three decades regarding the use of artificial intelligence and machine learning in the fields of astronomy and astrophysics. Abstract Since the beginning of the 21st century, the fields of astronomy and astrophysics have experienced significant growth at ...
José‐Víctor Rodríguez +2 more
wiley +1 more source
Measuring the Obliquities of the TRAPPIST-1 Planets with MAROON-X
The Astronomical Journal, 2023 A star’s obliquity with respect to its planetary system can provide us with insight into the system’s formation and evolution, as well as hinting at the presence of additional objects in the system. However, M dwarfs, which are the most promising targets
Madison Brady +8 more
doaj +1 more source