Results 71 to 80 of about 52,634 (236)

HII Regions And the Protosolar Helium, Carbon, and Oxygen Abundances in the Context of Galactic Chemical Evolution [PDF]

, 2011
We present chemical evolution models of the Galactic disk with different Z-dependent yields. We find that a moderate mass loss rate for massive stars of solar metallicity produces an excellent fit to the observed C/H and C/O gradients of the Galactic ...
Carigi, Leticia, Peimbert, Manuel
core  

On the Formation of Star-forming Galaxies Having Anomalously Low-metallicity Regions: The Role of Galaxy Interaction and Circumgalactic Medium/Intergalactic Medium Accretion

The Astrophysical Journal
Gas accretion from both the circumgalactic medium (CGM)/intergalactic medium (IGM) and interacting companion galaxy can dilute the gas phase metallicity of a galaxy. However, their relative contribution to the chemical evolution of galaxies remains to be
Yibo Cao, Zhizheng Pan
doaj   +1 more source

Effects of the alarm pheromone on Triatoma pallidipennis behaviour

Physiological Entomology, EarlyView.
T. pallidipennis performs behavioural acts in response to volatiles emitted by mechanically disturbed conspecifics. T. pallidipennis shows a repellent response when exposed to volatiles emitted by mechanically disturbed conspecifics. Isobutyric and propanoic acids can be used as repellents of T. pallidipennis. Abstract Adults of some Triatomine species,
Claudia I. Albores‐Flores, Ana E. Gutiérrez‐Cabrera, Julio C. Rojas, Edi A. Malo, Alex Córdoba‐Aguilar, Leopoldo Cruz‐López   +5 more
wiley   +1 more source

A deep Chandra observation of the poor cluster AWM4 - II. The role of the radio jets in enriching the intra-cluster medium

, 2010
We use a Chandra observation of the poor cluster AWM4 to map the temperature and abundance of the intra-cluster medium, so as to examine the influence of the central radio galaxy on its environment.
Ascasibar, Bildfell, Brüggen, Burns, Böhringer, Cappellaro, Ciotti, David, De Grandi, Denicoló, Edge, Ewan O’Sullivan, Gastaldello, Giacintucci, Gitti, Grevesse, Hicks, Jan M. Vrtilek, Kaastra, Kalberla, Kirkpatrick, Koranyi, Kuntz, Laurence P. David, Markevitch, Mazzotta, McNamara, Mittal, Nomoto, Nulsen, O’Dea, O’Sullivan, O’Sullivan, O’Sullivan, Peterson, Pipino, Rasia, Rasmussen, Rasmussen, Rebusco, Rebusco, Roediger, Salomé, Sanders, Schombert, Simionescu, Simionescu, Simionescu, Simona Giacintucci, Snowden, Somak Raychaudhury, Vikhlinin, Weisskopf, Werner, Xiang   +54 more
core   +1 more source

Stellar Mergers or Truly Young? Intermediate-age Stars on Highly Radial Orbits in the Milky Way’s Stellar Halo

The Astrophysical Journal
Reconstructing the mass assembly history of the Milky Way relies on obtaining detailed measurements of the properties of many stars in the galaxy, especially in the stellar halo.
Danny Horta, Yuxi (Lucy) Lu, Melissa K. Ness, Mariangela Lisanti, Adrian M. Price-Whelan   +4 more
doaj   +1 more source

Lessons from the void: What Boltzmann brains teach

Analytic Philosophy, EarlyView.
Abstract Some physical theories predict that almost all brains in the universe are Boltzmann brains, that is, short‐lived disembodied brains that are accidentally assembled as a result of thermodynamic or quantum fluctuations. Physicists and philosophers of physics widely regard this proliferation as unacceptable, and so take its prediction as a basis ...
Bradford Saad
wiley   +1 more source

THE COOL GIANT STARS AND CHEMICAL EVOLUTION OF GALAXY

Odessa Astronomical Publications, 2017
The fundamental characteristics and abundances of cool giant stars is discussed. The possible evolution of nuclides in process evolution of Galaxy was very shortly described.
N. S. Komarov, T. V. Shevchuk
doaj   +1 more source

Technical considerations and review of urinary microRNAs as biomarkers for chronic kidney disease in dogs and cats

Veterinary Clinical Pathology, EarlyView.
Abstract MicroRNAs (miRNAs or miRs) are small, non‐coding RNAs that play a crucial role in gene regulation, making them potential biomarkers for various diseases. In the field of veterinary medicine, there is a growing interest in exploring the diagnostic and therapeutic potential of miRNAs in kidney diseases affecting dogs and cats.
Candice P. Chu, Mary B. Nabity
wiley   +1 more source

Spaceborne and spaceborn: Physiological aspects of pregnancy and birth during interplanetary flight

Experimental Physiology, EarlyView.
Abstract Crewed interplanetary return missions that are on the planning horizon will take years, more than enough time for initiation and completion of a pregnancy. Pregnancy is viewed as a sequence of processes – fertilization, blastocyst formation, implantation, gastrulation, placentation, organogenesis, gross morphogenesis, birth and neonatal ...
Arun V. Holden
wiley   +1 more source

Chemical compositions of six metal-poor stars in the ultra-faint dwarf spheroidal galaxy Bo\"otes I

, 2014
Ultra-faint dwarf galaxies recently discovered around the Milky Way (MW) contain extremely metal-poor stars, and might represent the building blocks of low-metallicity components of the MW.
Aoki, Wako, Arimoto, Nobuo, Ishigaki, Miho N., Okamoto, Sakurako   +3 more
core   +1 more source