Search Publications
Phase-Space Correlations among Systems of Satellite Galaxies
Pawlowski, Marcel S.
Driven by the increasingly complete observational knowledge of systems of satellite galaxies, mutual spatial alignments and relations in velocities among satellites belonging to a common host have become a productive field of research. Numerous studies have investigated different types of such phase-space correlations and were met with varying deg…
Discovery of 178 Giant Radio Galaxies in 1059 deg2 of the Rapid ASKAP Continuum Survey at 888 MHz
Andernach, Heinz; Jiménez-Andrade, Eric F.; Willis, Anthony G.
We report the results of a visual inspection of images of the Rapid ASKAP Continuum Survey (RACS) in search of extended radio galaxies (ERG) that reach or exceed linear sizes on the order of one Megaparsec. We searched a contiguous area of 1059 deg2 from RAJ = 20h20m to 06h20m, and ‑50∘<DecJ<‑40∘, which is covered by deep multi-band optical …
The Cusp–Core Problem in Gas-Poor Dwarf Spheroidal Galaxies
Boldrini, Pierre
This review deals with the inconsistency of inner dark matter density profiles in dwarf galaxies, known as the cusp–core problem. In particular, we aim to focus on gas-poor dwarf galaxies. One of the most promising solutions to this cold dark matter small-scale issue is the stellar feedback, but it seems to be only designed for gas-rich dwarfs. Ho…
Are Disks of Satellites Comprised of Tidal Dwarf Galaxies?
Famaey, Benoit; Kroupa, Pavel; Thies, Ingo +1 more
It was found that satellites of nearby galaxies can form flattened co-rotating structures called disks of satellites or planes of satellites. Their existence is not expected by the current galaxy formation simulations in the standard dark matter-based cosmology. On the contrary, modified gravity offers a promising alternative: the objects in the d…
Modeling of Spiral Structure in a Multi-Component Milky Way-Like Galaxy
Korchagin, Vladimir; Khrapov, Sergey; Khoperskov, Alexander
Using recent observational data, we construct a set of multi-component equilibrium models of the disk of a Milky Way-like galaxy. The disk dynamics are studied using collisionless-gaseous numerical simulations, based on the joined integration of the equations of motion for the collision-less particles using direct integration of gravitational inte…
A Stringent Test of Magnetic Models of Stellar Evolution
Torres, Guillermo; Vanderburg, Andrew; Curtis, Jason L. +1 more
Main-sequence stars with convective envelopes often appear larger and cooler than predicted by standard models of stellar evolution for their measured masses. This is believed to be caused by stellar activity. In a recent study, accurate measurements were published for the K-type components of the 1.62-day detached eclipsing binary EPIC 219511354,…
Analysis of the Open Cluster NGC 2281
Terrell, Dirk; Gross, John; Cooney, Walter R., Jr.
B V observations of an approximately 68 ' × 48 ' field centered on the open cluster NGC 2281 and covering more than 400 nights from 2013 to 2018 are presented. The photometric observations were transformed to the standard system using standards from the American Association of Variable Star Observers Photometric All-sky Survey (APASS) DR10 and ana…