Results 31 to 40 of about 173,290,720 (185)

Mathematics and explanation in astronomy and astrophysics [PDF]

, 2007
The purpose of this paper is to expound and clarify the mathematics and explanations commonly employed in certain notable areas of astronomy and astrophysics.
McCabe, Gordon, Gordon Mccabe
core  

Properties of flat-spectrum radio-loud narrow-line Seyfert 1 galaxies (Corrigendum) [PDF]

, 2017
Published VersionThis article is an erratum for: Properties of flat-spectrum radio-loud narrow-line Seyfert 1 galaxies (Astronomy & Astrophysics vol 575, A13, 2015)
P. Rafanelli, Lähteenmäki, A., Tornikoski, M., L. Maraschi, Cracco, V., Caccianiga, A., VERCELLONE, STEFANO, S. Vercellone, ROMANO, Patrizia, M. Tornikoski, B. M. Peterson, S. Mathur, Lisakov, M. M., J. L. Richards, FOSCHINI, LUIGI, M. M. Lisakov, L. Gallo, Tammi, J., L. Foschini, Grupe, D., Ciroi, S., CACCIANIGA, Alessandro, V. Cracco, Lister, M. L., Angelakis, E., Romano, P., S. Kaufmann, M. Berton, Peterson, B. M., Järvelä, E., Sievers, A., Maraschi, L., E. Angelakis, S. Ciroi, Fuhrmann, L., Richards, J. L., G. Tagliaferri, Braito, V., Vercellone, S., V. Braito, Rafanelli, P., Gallo, Luigi C., G. La Mura, Foschini, L., Gallo, L., A. Sievers, Mathur, S., Tagliaferri, G., S. Komossa, Tibolla, O., P. Romano, L. Fuhrmann, A. Lähteenmäki, Berton, M., D. Grupe, E. Järvelä, O. Tibolla, La Mura, G., Kaufmann, S., Komossa, S., M. L. Lister, Kovalev, Y. Y., Y. Y. Kovalev, J. Tammi, A. Caccianiga   +64 more
core   +1 more source

Can We Constrain Warm Dark Matter Masses with Individual Galaxies?

The Astrophysical Journal
We study the impact of warm dark matter (WDM) mass on the internal properties of individual galaxies using a large suite of 1024 state-of-the-art cosmological hydrodynamic simulations from the DREAMS project.
Shurui Lin, Francisco Villaescusa-Navarro, Jonah Rose, Paul Torrey, Arya Farahi, Kassidy E. Kollmann, Alex M. Garcia, Sandip Roy, Mark Vogelsberger, Nitya Kallivayalil, Yi-Fu Cai, Wentao Luo   +11 more
doaj   +1 more source

Influence of Dynamical Friction on the Unstable Manifolds of Lagrange Points in Barred Galaxies

Astronomische Nachrichten, EarlyView.
ABSTRACT Some time ago the idea has been proposed that rings and spirals in barred galaxies are shaped by the unstable manifolds of the Lagrange points sitting near the ends of the bar. The topic of the present article is an investigation of whether the numerical support for this suggestion can be improved by the inclusion of dynamical friction into ...
Christof Jung
wiley   +1 more source

Optical polarimetry studies of Seyfert galaxies [PDF]

, 1999
Optical imaging polarimetry has been performed on seven nearby Seyfert galaxies, three with face-on and four with edge-on host galaxies of various morphological classifications.
Felton, Michelle Ann
core  

Detectors and Shieldings: Past and Future at LUNA

Universe
Nuclear reactions are responsible for the chemical evolution of stars, galaxies and the Universe. Unfortunately, at temperatures of interest for nuclear astrophysics, the cross-sections of the thermonuclear reactions are in the pico- femto-barn range and
Chemseddine Ananna, Lucia Barbieri, Axel Boeltzig, Matteo Campostrini, Fausto Casaburo, Alessandro Compagnucci, Laszlo Csedreki, Riccardo Maria Gesue, Jordan Marsh, Daniela Mercogliano, Denise Piatti, Duncan Robb, Ragandeep Singh Sidhu, Jakub Skowronski   +13 more
doaj   +1 more source

Direct SMBH Formation Driven by Runaway Stellar Collisions in Globally Unstable Stellar Systems

Astronomische Nachrichten, EarlyView.
ABSTRACT The fueling problem addresses the ultimate fate of the reservoirs of gas and stars driven into the deepest gravitational potential wells of galaxies, thus it may contain the Universe's densest concentrations of gas and stars. This raises a key question: does the infalling material collapse directly into a supermassive black hole, or can it ...
Marcelo C. Vergara, Andrés Escala
wiley   +1 more source

Constraining Cosmology with Machine Learning and Galaxy Clustering: The CAMELS-SAM Suite

The Astrophysical Journal, 2023
As the next generation of large galaxy surveys come online, it is becoming increasingly important to develop and understand the machine-learning tools that analyze big astronomical data.
Lucia A. Perez, Shy Genel, Francisco Villaescusa-Navarro, Rachel S. Somerville, Austen Gabrielpillai, Daniel Anglés-Alcázar, Benjamin D. Wandelt, L. Y. Aaron Yung   +7 more
doaj   +1 more source

Scalable Computation of Topological Abstractions for Scalar Data

Computer Graphics Forum, EarlyView.
Abstract Topological data analysis has become an important tool for large scale scalar data analysis and visualization, efficiently extracting the inherent structure and features of interest of the data. However, with growing dataset sizes and complexity, it is increasingly becoming infeasible to compute topological abstractions of interest in serial ...
M. Will, J. Lukasczyk, J. Tierny, A. Gyulassy, G. H. Weber, H. Carr, C. Garth   +6 more
wiley   +1 more source

The properties of discrete X-ray sources in star-forming galaxies [PDF]

, 2012
Observations of starburst galaxies have revealed a large number of point-like X-ray sources located within these systems, including active galactic nuclei (AGN), X-ray binaries (XRBs), and utraluminous X-ray sources (ULXs).
JACKSON, FLOYD,EMMANUEL
core