Results 91 to 100 of about 47,514 (302)

Hypervelocity Stars. I. The Spectroscopic Survey

, 2006
We discuss our targeted search for hypervelocity stars (HVSs), stars traveling with velocities so extreme that dynamical ejection from a massive black hole is their only suggested origin. Our survey, now half complete, has successfully identified a total
Blaauw A., Ginsburg I., Irwin M., Margaret J. Geller, Michael J. Kurtz, O’Toole S. J., Poveda A., Schaller G., Scott J. Kenyon, Warren R. Brown   +9 more
core   +1 more source

Description of the skull, braincase, and dentition of Moschognathus whaitsi (Dinocephalia, Tapinocephalia), and its palaeobiological and behavioral implications

The Anatomical Record, EarlyView.
Abstract A subadult Moschognathus whaitsi from the Eastern Cape Province, South Africa, was scanned using synchrotron radiation X‐ray computed tomography (SRXCT). Its subadult state allowed the cranial bones and teeth to be identified and individually reconstructed in 3D.
Tristen Lafferty, Luke A. Norton, Aliénor Duhamel, Julien Benoit   +3 more
wiley   +1 more source

Masgomas-4: Physical characterization of a double-core obscured cluster with a massive and very young stellar population

, 2014
The discovery of new, obscured massive star clusters has changed our understanding of the Milky Way star-forming activity from a passive to a very active star-forming machine. The search for these obscured clusters is strongly supported by the use of all-
Alegría, S. Ramírez, Herrero, A., Marín-Franch, A.   +2 more
core   +1 more source

An Understanding of the Shoulder of Giants: Jovian Planets around Late K Dwarf Stars and the Trend with Stellar Mass [PDF]

, 2013
Analyses of exoplanet statistics suggest a trend of giant planet occurrence with host star mass, a clue to how planets like Jupiter form. One missing piece of the puzzle is the occurrence around late K dwarf stars (masses of 0.5-0.75Msun and effective ...
Fischer, Debra A., Gaidos, Eric, Howard, Andrew W., Mann, Andrew W.   +3 more
core   +5 more sources

T. rex cognition was T. rex‐like—A critical outlook on diverging views of the neurocognitive evolution in dinosaurs

The Anatomical Record, EarlyView.
Abstract A recent debate has emerged between Caspar et al. (2024) and Herculano‐Houzel (2023) on inferring extinct dinosaur cognition by estimating brain neuron counts. While thought‐provoking, the discussion largely overlooks the function of cognition, as well as partly neglects the difficulties involved in estimating neuron numbers, which according ...
Thomas Rejsenhus Jensen, Ivo Jacobs, Kristina Kverková, Lona Lalić, Alexandra Polonyiová, Patrik Stehlík, Stephan A. Reber, Mathias Osvath   +7 more
wiley   +1 more source

Evolution of Stellar Activity and Habitable Zone. I. Ultraviolet Emission of Dwarfs in Open Clusters and Field Stars

The Astrophysical Journal Supplement Series
Near-ultraviolet (NUV) radiation from dwarf stars plays a critical role in shaping the habitability of planetary systems, yet its long-term evolution across different spectral types remains poorly investigated.
Xue Li, Song Wang, Jun Ma, Henggeng Han, Yang Huang, Jifeng Liu   +5 more
doaj   +1 more source

Detailed Analysis of Nearby Bulgelike Dwarf Stars II. Lithium Abundances [PDF]

, 2002
Li abundances are derived for a sample of bulgelike stars with isochronal ages of 10-11 Gyr. These stars have orbits with pericentric distances, Rp, as small as 2-3 kpc and Zmax < 1 kpc.
Barbuy B., Beatriz Barbuy, Bruno Vaz Castilho, Carlsson M., Castilho B. V., Cayrel R., Cayrel R., D’Antona F., Favata F., Garcia Lopez R. J., Gustafsson B., James D. J., Jeffries R. D., Lambert D. L., Lambert D. L., Luciana Pompeia, Michel Grenon, Pasquini L., Pasquini L., Proffitt C. R., Randich S., Randich S., Soderblom D. R., Spite F., Spite F., Thorburn J. A.   +25 more
core   +2 more sources

Multi‐method analysis for the three‐dimensional reconstruction of muscle fascicles from DiceCT datasets

The Anatomical Record, EarlyView.
Abstract Muscle architecture is a major determinant of muscle performance and, in mammalian lineages, has been correlated with both feeding ecology and locomotor behaviors. Over the past decade, contrast‐enhanced micro‐CT (DiceCT) has emerged as an alternative to traditional dissection‐based measurement.
Aleksandra Ratkiewicz, Michael C. Granatosky, Cassidy E. Davis, Julia Molnar, Adam Hartstone‐Rose, Edwin Dickinson   +5 more
wiley   +1 more source

Searching for GEMS: The Occurrence of Giant Planets Orbiting M Dwarfs within 100 pc

The Astronomical Journal
We present results from a systematic search for transiting short-period giant exoplanets around M dwarf stars (GEMS; P  
Rowen I. Glusman, Caleb I. Cañas, Shubham Kanodia, Te Han, Rachel B. Fernandes, Guđmundur Stefánsson, Eric B. Ford, Marissa Maney, Andrew Monson, Andrew Hotnisky, Suvrath Mahadevan, Michael Rodruck, Kristo Ment, Andrew McWilliam, William D. Cochran, Knicole D. Colón, Mark R. Giovinazzi, Jaime A. Alvarado-Montes, Chad F. Bender, Cullen H. Blake, Alexandra Boone, Scott A. Diddams, Arvind F. Gupta, Samuel Halverson, Daniel Krolikowski, Andrea S.J. Lin, Joe P. Ninan, Paul Robertson, Arpita Roy, Christian Schwab, Ryan Terrien, Johanna Teske, Jason T. Wright   +32 more
doaj   +1 more source

First detection of nonflare microwave emissions from the coronae of single late-type dwarf stars

The Astrophysical Journal, 1981
Results are presented of a search for nonflare microwave radiation from the coronae of nearby late-type dwarf stars comparable to the sun: single stars without evidence for either a large wind or circumstellar envelope. The observing program consisted of flux measurements of six stars over a 24-h period with the VLA in the C configuration at a ...
D. E. Gary, J. L. Linsky
openaire   +1 more source