Results 111 to 120 of about 151,190 (310)

Weighing Cosmological Models with SNe Ia and Gamma Ray Burst Redshift Data

Universe, 2019
Many models have been proposed to explain the intergalactic redshift using different observational data and different criteria for the goodness-of-fit of a model to the data. The purpose of this paper is to examine several suggested models using the same
Rajendra P. Gupta
doaj   +1 more source

An inventory of galaxies in cosmic filaments feeding galaxy clusters: galaxy groups, backsplash galaxies, and pristine galaxies

, 2022
Galaxy clusters grow by accreting galaxies from the field and along filaments of the cosmic web. As galaxies are accreted they are affected by their local environment before they enter (pre-processing), and traverse the cluster potential. Observations that aim to constrain pre-processing are challenging to interpret because filaments comprise a ...
Kuchner, Ulrike, Haggar, Roan, Pearce, Frazer R, Gray, Meghan E, Cui, Weiguang, Knebe, Alexander, Yepes, Gustavo   +6 more
openaire  

Narrow-line Seyfert 1 galaxies and the evolution of galaxies and active galaxies [PDF]

Monthly Notices of the Royal Astronomical Society, 2000
Narrow Line Seyfert 1 galaxies (NLS1s) are intriguing due to their continuum as well as emission line properties. The observed peculiar properties of the NLS1s are believed to be due to accretion rate close to Eddington limit. As a consequence, for a given luminosity, NLS1s have smaller black hole (BH) masses compared to normal Seyfert galaxies.
openaire   +2 more sources

The Optical Variability of the BL Lac AO 0235+164

Galaxies, 2016
In this work, we present optical R band observations of AO 0235+164 carried out during the period of November 2006 to December 2012 using the Ap6E CCD camera attached to the primary focus of the 70 cm meniscus telescope at Abastumani Observatory, Georgia.
Junhui Fan, Omar Kurtanidze, Yi Liu, Xiang Liu, Gotthard M. Richter, Maria G. Nikolashvili, Sophia O. Kurtanidze, Revaz Chanishvili, Hongtao Wang, Mahito Sasada, Aiying Zhou, Chao Lin, Yuhai Yuan   +12 more
doaj   +1 more source

Cis–Trans Rotational Isomerism of Formic Acid, Sulfur, and Selenium Analogues and Their Dimers: Chemical Kinetics Under Interstellar Conditions

International Journal of Chemical Kinetics, EarlyView.
ABSTRACT We present chemical kinetic rate constants for the cis to trans isomerisation or rotamerization of monomeric seleno‐, thio‐, and formic acids and that of three of their dimeric species, based on variational transition state theory and multidimensional tunneling calculations in the gas‐phase, from 10 K to 300 K. These provide, firstly, reliable
Judith Wurmel, John M. Simmie
wiley   +1 more source

Theoretical Re-evaluations of Scaling Relations between SMBHs and Their Host Galaxies—1. Effect of Seed BH Mass

Frontiers in Astronomy and Space Sciences, 2017
We use a semi-analytic model of galaxy formation and investigate how the mass of a seed black hole affect the scaling relation between black hole mass and bulge mass at z ~ 0.
Hikari Shirakata, Toshihiro Kawaguchi, Takashi Okamoto, Ryu Makiya, Ryu Makiya, Tomoaki Ishiyama, Yoshiki Matsuoka, Masahiro Nagashima, Motohiro Enoki, Taira Oogi, Masakazu A. R. Kobayashi   +10 more
doaj   +1 more source

The incidence of bar-like kinematic flows in CALIFA galaxies [PDF]

, 2015
KS acknowledges support from the Natural Sciences and Engineering Research Council of Canada. CJW acknowledges support through the Marie Curie Career Integration Grant 303912.
Barrera-Ballesteros, J.K., Marino, R.A., Walcher, C. J., Méndez Abreu, J., Mendez Abreu, Jairo, Walcher, C.J., Sánchez, S. F., Holmes, L., Cortijo-Ferrero, C., Sánchez, S.F., Spekkens, K., Kalinova, V., Mast, D., Marino, Raffaella Anna, García-Benito, R., García Benito, R., Cortijo Ferrero, C., Barrera Ballesteros, J. K.   +17 more
core   +1 more source

Patterns of wild meat and other protein consumption in the periphery of Salonga National Park, Democratic Republic of the Congo

People and Nature, EarlyView.
Abstract In Central Africa, human activities are severely impacting terrestrial and aquatic wildlife, threatening the food security of millions of people. Accordingly, sustainable use of wildlife is crucial for the nutrition and livelihoods of many rural communities in the region.
Zolo Admettons, Mattia Bessone, Josué Ausse Baraka, Josué Engombe Botomia, Espérance Miezi, Bénédicte Nsilu, Jonathan Nkamisha Mukole, Michel Opelele Omeno, Jean Semeki Ngabinzeke, Barbara Fruth   +9 more
wiley   +1 more source

Surface photometry of early-type galaxies in rich clusters [PDF]

, 1998
This thesis investigates the morphology of early-type galaxies in two rich clusters using 2D surface photometry. In particular, the amount of light in the 'disk' component is focussed upon, as the presence of a disk is the main morphological criterion in
Steel, James, Steel, J.
core  

Oberflächencharakterisierung auf atomarer Ebene: Vom Sehen einzelner Atome zum Verständnis chemischer Prozesse

Physik in unserer Zeit, EarlyView.
Sehen ist der erste Schritt in Richtung Verstehen. Dieses Prinzip gilt von der Beobachtung ferner Galaxien bis hin zur Untersuchung einzelner Atome und hält damit über viele Größenordnungen. Heutzutage ermöglichen moderne Mikroskope die Beobachtung einzelner Atome und sogar die gezielte Kontrolle chemischer Reaktionen einzelner Moleküle ...
Jan Balajka, Johanna I. Hütner-Reisch
wiley   +1 more source