Results 91 to 100 of about 4,433 (297)

Potential for Life to Exist and be Detected on Earth-like Planets Orbiting White Dwarfs

The Astrophysical Journal Letters
With recent observations confirming exoplanets orbiting white dwarfs, there is growing interest in exploring and quantifying the habitability of temperate rocky planets around white dwarfs.
Caldon T. Whyte, L. H. Quiroga-Nuñez, Manasvi Lingam, Paola Pinilla   +3 more
doaj   +1 more source

Dental crown morphological variation and heterodonty in carcharhiniform sharks

The Anatomical Record, EarlyView.
Abstract Elasmobranch teeth are highly mineralized structures that constitute the majority of the fossil record for this group. Despite their taxonomic and evolutionary significance, detailed descriptions of dental morphology remain scarce. The order Carcharhiniformes, the most diverse among sharks, comprises 304 valid species that display remarkable ...
Flávia Zanini, Karla D. A. Soares
wiley   +1 more source

General Relativity Can Prevent a Runaway Greenhouse on Potentially Habitable Planets Orbiting White Dwarfs

The Astrophysical Journal
Planets orbiting in the habitable zones of white dwarfs have recently been proposed as promising targets for biosignature searches. However, since the white dwarf habitable zone resides at 0.01–0.1 au, planets residing there are subject to tidal heating ...
Eva Stafne, Juliette Becker
doaj   +1 more source

A new species of Lonchidiidae (Hybodontiformes) from the Late Jurassic of Brazil (Aliança Formation, Jatobá Basin)

The Anatomical Record, EarlyView.
Abstract The Aliança Formation (Jatobá Basin) represents lacustrine deposits formed in oxygenated waters that hosted a diverse fauna, including Hybodontiform sharks. Within this group, the Family Lonchidiidae comprises 11 valid genera, with Parvodus previously reported in Brazilian deposits from the Brejo Santo Formation (Araripe Basin, Late Jurassic ...
Larissa de Souza Ribeiro, Marco Aurélio Gallo de França   +1 more
wiley   +1 more source

Measuring the masses of the habitable planets around the 50 closest solar-type stars with Theia [PDF]

, 2015
A major goal of exoplanetary science is the search for possible biosignatures on planets where life similar to ours would have emerged and modified the atmosphere. These planets can be detected by remote sensing using spectroscopic observation of O2, O3,
Malbet, Fabien, Leger, Alain, SOZZETTI, Alessandro, Theia Consortium, Anglada-Escude, Guillem, Crouzier, Antooine   +5 more
core  

Statistics and Habitability of F-type Star–Planet Systems

The Astrophysical Journal Supplement Series
F-type star–planet systems represent an intriguing case for habitability studies. Although F-type stars spend considerably less time on the main sequence (MS) than G-, K-, and M-type stars, they still offer a unique set of features, allowing for the ...
Shaan D. Patel, Manfred Cuntz, Nevin N. Weinberg   +2 more
doaj   +1 more source

Redescription of the Triassic cynodont Cistecynodon parvus and reassessment of its phylogeny

The Anatomical Record, EarlyView.
Abstract Cynodontia is an important subclade of Therapsida that first occurred in the late Permian. It includes extinct subclades which are the non‐mammaliaform cynodonts and Mammaliaformes, with the latter ultimately giving rise to crown mammals. The systematics of non‐mammaliaform cynodonts has been extensively studied and is relatively well‐resolved,
Erin S. Lund, Frederik P. Wolvaardt, Roger M. H. Smith, Jaganmoy Jodder, Julien Benoit   +4 more
wiley   +1 more source

Exoplanet characterization by proxy: a transiting 2.15 R⊕ planet near the habitable zone of the late K dwarf Kepler-61 [PDF]

, 2013
We present the validation and characterization of Kepler-61b: a 2.15 R ⊕ planet orbiting near the inner edge of the habitable zone of a low-mass star.
Fressin, Francois, Mann, Andrew W., Bryson, Stephen T., Horch, Elliott P., Henze, Christopher E., Charbonneau, David, Howell, Steven B., Newton, Elisabeth, Everett, Mark E., Ciardi, David R., Ballard, Sarah, Crepp, Justin R., Desert, Jean Michel, Irwin, Jonathan, Shporer, Avi, Torres, Guillermo   +15 more
core   +1 more source

A Terminology and Quantitative Framework for Assessing the Habitability of Solar System and Extraterrestrial Worlds

The Planetary Science Journal
The search for extraterrestrial life in the solar system and beyond is a key science driver in astrobiology, planetary science, and astrophysics. A critical step is the identification and characterization of potential habitats, both to guide the search ...
Dániel Apai, Rory Barnes, Matthew M. Murphy, Tim Lichtenberg, Noah Tuchow, Régis Ferrière, Kevin Wagner, Antonin Affholder, Renu Malhotra, Baptiste Journaux, Allona Vazan, Ramses Ramirez, Abel Méndez, Stephen R. Kane, Veronica H. Klawender, NExSS Quantitative Habitability Science Working Group   +15 more
doaj   +1 more source

Male reproductive system in stenopodidean shrimps: Unveiling basal reproductive traits in shrimp‐like Pleocyemata (Stenopodidae and Spongicolidae)

The Anatomical Record, EarlyView.
Abstract Stenopodidea represents one of the basal lineages within Pleocyemata, yet the male reproductive system (MRS) of this group remains poorly understood, with limited information available regarding its morphology and function. This study provides the first detailed description of the MRS in four stenopodidean shrimp species from two families ...
Caio Santos Nogueira, Lucas Rezende Penido Paschoal, Fernando José Zara   +2 more
wiley   +1 more source