Results 61 to 70 of about 11,151 (256)

A Vast Thin Plane of Co-rotating Dwarf Galaxies Orbiting the Andromeda Galaxy

, 2013
Dwarf satellite galaxies are thought to be the remnants of the population of primordial structures that coalesced to form giant galaxies like the Milky Way.
A Klypin, A Koch, A. Dougal Mackey, A. R. Conn, Alan W. McConnachie, Annette M. N. Ferguson, Anthony R. Conn, AR Conn, AR Zentner, AW McConnachie, AW McConnachie, AW McConnachie, D Lynden-Bell, D Lynden-Bell, David Valls-Gabaud, DG Barnes, E Komatsu, EJ Tollerud, Geraint F. Lewis, J Wang, JC Richardson, Julio Navarro, Lawrence M. Widrow, M Metz, M Metz, M Metz, Mark Fardal, MG Lee, Michael J. Irwin, Michelle L. Collins, MLM Collins, MR Lovell, MS Pawlowski, Neil G. Ibata, Nicolas F. Martin, R. Michael Rich, Rodrigo A. Ibata, RP van der Marel, Scott C. Chapman, SR Majewski   +39 more
core   +2 more sources

Mass modelling the Andromeda Dwarf Galaxies: Andromeda VI and Andromeda XXIII

Monthly Notices of the Royal Astronomical Society
ABSTRACT Accurately mapping the mass profiles of low mass dwarf spheroidal (dSph) galaxies allows us to test predictions made by dark matter (DM) models. To date, such analyses have primarily been performed on Milky Way (MW) satellites.
Connor S Pickett, Michelle L M Collins, R Michael Rich, Justin I Read, Emily J E Charles, Nicolas Martin, Scott Chapman, Alan McConnachie, Alessandro Savino, Daniel R Weisz   +9 more
openaire   +2 more sources

Das zirkumgalaktische Medium

Physik in unserer Zeit, Volume 56, Issue 1, Page 30-37, January 2025.
Galaxien wie die Milchstraße sind umhüllt von einem gigantischen Kokon aus diffusem Gas. Aktuelle Forschungsergebnisse belegen, dass dieses zirkumgalakische Medium eine entscheidende Rolle für die Entstehung und Entwicklung von Galaxien spielt. Zusammenfassung Als zirkumgalaktisches Medium bezeichnet man die gasförmigen Hüllen von Galaxien, die sich ...
Philipp Richter
wiley   +1 more source

Anthropic Principle’s Predicting Symmetric Distribution Matter Strata, Their Physics Laws, and Verifications

Advances in Astronomy, Volume 2019, Issue 1, 2019., 2019
This paper shows anthropic principle’s predicting symmetric distribution matter strata, their physics laws, and verifications, concretely deduces characteristic time, energy, and temperature expressions at different scales, discovers four interesting invariant quantities, shows homeomorphic theorem of space map, and naturally presents a supersymmetric ...
Changyu Huang, Yong-Chang Huang, Pradyumn K. Sahoo   +2 more
wiley   +1 more source

The Samples and Binary Fractions of Red Supergiants in M31 and M33 by the HST Observations

The Astrophysical Journal
The binarity of red supergiants (RSGs) influences their evolution and the fate of supernovae. We investigate the binary fraction of RSGs in the Andromeda galaxy (M31) and Triangulum galaxy (M33) using photometry from the Hubble Space Telescope (HST ...
Min Dai, Shu Wang, Biwei Jiang, Ying Li
doaj   +1 more source

Radiation burst by axion star collision with star in the Andromeda Galaxy

Physics Letters B, 2022
Axion is a promising candidate of dark matter in the universe. A fraction of dark matter axion may form axion star with radius ∼102 km. We show that the axion star emits radiation burst by the collision with K and M types main sequence star in the ...
Aiichi Iwazaki
doaj   +1 more source

Critical steps in an environmental metaproteomics workflow

Environmental Microbiology, Volume 26, Issue 5, May 2024.
Metaproteomics, a potent yet underutilized tool, reveals the complexities of microbial communities. Our review emphasizes its accessibility and provides diverse workflow descriptions tailored to various environmental matrices. We aim to convince readers of its capability to unravel the structural, dynamic, and metabolic nuances within microbial ...
Daniel J. Nebauer, Leanne A. Pearson, Brett A. Neilan   +2 more
wiley   +1 more source

Probing the Disk Kinematics of M31 with DESI

Edinburgh Student Journal of Science
M31’s stellar rotation curve and disk line-of-sight dispersion is presented using kinematic data from a novel DESI M31 survey in combination with similar datasets.
Struan Stevenson
doaj   +1 more source

The Hubble Space Telescope Survey of M31 Satellite Galaxies. II. The Star Formation Histories of Ultrafaint Dwarf Galaxies

The Astrophysical Journal, 2023
We present the lifetime star formation histories (SFHs) for six ultrafaint dwarf (UFD; M _V > − 7.0, $4.9\lt {\mathrm{log}}_{10}({M}_{* }(z=0)/{M}_{\odot })\lt 5.5$ ) satellite galaxies of M31 based on deep color–magnitude diagrams constructed from ...
Alessandro Savino, Daniel R. Weisz, Evan D. Skillman, Andrew Dolphin, Andrew A. Cole, Nitya Kallivayalil, Andrew Wetzel, Jay Anderson, Gurtina Besla, Michael Boylan-Kolchin, Thomas M. Brown, James S. Bullock, Michelle L. M. Collins, M. C. Cooper, Alis J. Deason, Aaron L. Dotter, Mark Fardal, Annette M. N. Ferguson, Tobias K. Fritz, Marla C. Geha, Karoline M. Gilbert, Puragra Guhathakurta, Rodrigo Ibata, Michael J. Irwin, Myoungwon Jeon, Evan N. Kirby, Geraint F. Lewis, Dougal Mackey, Steven R. Majewski, Nicolas Martin, Alan McConnachie, Ekta Patel, R. Michael Rich, Joshua D. Simon, Sangmo Tony Sohn, Erik J. Tollerud, Roeland P. van der Marel   +36 more
doaj   +1 more source

A dual‐omics approach on the effects of fibroblast growth factor‐2 (FGF‐2) on ventral tegmental area dopaminergic neurons in response to alcohol consumption in mice

European Journal of Neuroscience, Volume 59, Issue 7, Page 1519-1535, April 2024.
FGF‐2 knockout (KO) results in reduced alcohol consumption and preference in the two‐bottle choice mouse model over 6 weeks of 20% voluntary alcohol access. Loss of FGF‐2 leads to the downregulation of Otx2, Igf1 and Lpl, as well as the upregulation of Vgat, Lmx1a, Foxa2, Ndnf, Chrna4 and Sat1b, genes specific for DAergic subpopulations.
Leonie Hose, Alina Katharina Langenhagen, Ekaterini Kefalakes, Theresa Schweitzer, Sabrina Kubinski, Segev Barak, Andreas Pich, Claudia Grothe   +7 more
wiley   +1 more source