Results 161 to 170 of about 189,294 (310)

A Comparative Study between M30 and M92: M92 is a Merger Remnant with a Large Helium Enhancement

The Astrophysical Journal
We perform a comparative study of the ex situ second-parameter pair globular clusters (GCs) M30 and M92, having similar metallicities but different horizontal branch morphologies.
Jae-Woo Lee
doaj   +1 more source

The Coloniality of Data: Police Databases and the Rationalization of Surveillance from Colonial Vietnam to the Modern Carceral State

The British Journal of Sociology, EarlyView.
ABSTRACT Tracing the early adoption of computer gang databases by the Los Angeles County Sheriff's Department and the Los Angeles Police Department in the 1980s to the deployment of computationally‐assisted surveillance during the Vietnam War, this paper uses a genealogical approach to compare surveillance technologies developed across the arc of ...
Christina Hughes
wiley   +1 more source

On the Age Calibration of Open Clusters Using Red Clump Stars

The Astronomical Journal
In this study, we extend the dust-independent Hatzidimitriou relation between cluster age and d _B _− _R color difference between the red giant branch (RGB) and red clump to younger cluster ages.
Abigail R. Chriss, Guy Worthey
doaj   +1 more source

The Astrophysical Distance Scale. III. Distance to the Local Group Galaxy WLM Using Multiwavelength Observations of the Tip of the Red Giant Branch, Cepheids, and JAGB Stars [PDF]

, 2021
Abigail J. Lee, Wendy L. Freedman, Barry F. Madore, Kayla A. Owens, Andrew J. Monson, Taylor J. Hoyt   +5 more
openalex   +1 more source

Museomics Deciphers the Phylogeographic Differentiation and Conservation Status of a Montane Pheasant

Integrative Zoology, EarlyView.
Museum specimens provide a rich source of historical DNA, enabling insights into phylogenetic relationships and demographic history of the endangered Koklass Pheasant. Our findings uncovered a previously unrecognized population in Guizhou province and highlighted elevated extinction risk in populations from Anhui province and Southern China, informing ...
Zhiyong Jiang, Yalin Cheng, Shuai Zhang, Wenqing Zang, Peng He, Dezhi Zhang, Jinjuan Mei, Peng Cui, Yanhua Qu, Hailong Wu   +9 more
wiley   +1 more source

Small-amplitude Red Giants Elucidate the Nature of the Tip of the Red Giant Branch as a Standard Candle

The Astrophysical Journal Letters
Abstract The tip of the red giant branch (TRGB) is an important standard candle for determining luminosity distances. Although several 105 small-amplitude red giant stars (SARGs) have been discovered, variability was previously considered irrelevant for the TRGB as a standard candle.
Richard I. Anderson, Nolan W. Koblischke, Laurent Eyer   +2 more
openaire   +3 more sources

Evolutionary taxonomy and conservation status of environmentally sensitive and endangered musk deer (Moschus spp.): An updated review

Conservation Science and Practice, EarlyView.
This study reviews the historical taxonomic classification and evolutionary background of musk deer, clarifying long‐standing confusion in their identification. It highlights the current global distribution and conservation status of these species, emphasizing the threat posed by poaching and habitat destruction. The work aims to raise public awareness
Zhirong Zhang, Yun Su, Wenbin Yan, Zongzhi Li, Tianhua Hu, Jiwu Zhang, Liwei Teng, Zhensheng Liu   +7 more
wiley   +1 more source

Anomalously Fast Core and Envelope Rotation in Red Giants

The Astrophysical Journal
Red giants undergo dramatic and complex structural transformations as they evolve. Angular momentum is transported between the core and envelope during this epoch, a poorly understood process.
Siddharth Dhanpal, Othman Benomar, Shravan Hanasoge, Jim Fuller   +3 more
doaj   +1 more source

Zebrafish as a model for Catel–Manzke syndrome—identification and characterization of the zebrafish TGDS ortholog

The FEBS Journal, EarlyView.
Zebrafish Tgds, when expressed as a recombinant protein, catalyzes the dehydration of UDP‐D‐glucose, the initial step in the formation of 6‐deoxyhexoses. Corresponding Tgds mutations found in Catel–Manzke syndrome patients lead to reduced enzymatic activity and stability.
Maria Rosaria Coppola, Deianira Bellitto, Erfan Asgari, Virginia Bazzurro, Giorgia Casucci, Francesco Piacente, Matteo Bozzo, Davide Ceresa, Costantino Parisi, Cecilia Winata, Simona Candiani, Michela Tonetti   +11 more
wiley   +1 more source

Evidence of Third Dredge-up in Post-AGB Stars in Galactic Globular Clusters

The Astrophysical Journal
To better understand the mixing and mass loss experienced by low-mass stars as they ascend the asymptotic giant branch (AGB), I have gathered from the literature the abundances of CNO and s -process elements in post-AGB stars in Galactic globular ...
William V. Dixon
doaj   +1 more source