Results 61 to 70 of about 154,665 (207)

Joint Constraints on Fuzzy and Warm Dark Matter from Satellite Populations of the Milky Way and Andromeda

The Astrophysical Journal
We perform a joint analysis of the Milky Way (MW) and Andromeda (M31) satellite populations to constrain the properties of fuzzy dark matter (FDM) and thermal-relic warm dark matter (WDM).
Jianxiang Liu, Yan Gong, Kai Liao
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

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

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

On the Blueshift of the Andromeda Galaxy

Communications of the Byurakan Astrophysical Observatory
The observed spectral shift of galaxies is usually interpreted using the Doppler effect. However, attention should be paid to other possible mechanisms of spectral shift. For example, suppose baryon matter evolves due to interaction with the carrier of dark energy.
H. A. Harutyunian, A. A. Torosyan
openaire   +1 more source

Causal theories of spacetime

Noûs, Volume 58, Issue 1, Page 202-224, March 2024.
Abstract We develop a new version of the causal theory of spacetime. Whereas traditional versions of the theory seek to identify spatiotemporal relations with causal relations, the version we develop takes causal relations to be the grounds for spatiotemporal relations. Causation is thus distinct from, and more basic than, spacetime. We argue that this
Sam Baron, Baptiste Le Bihan
wiley   +1 more source

New luminous blue variables in the Andromeda galaxy [PDF]

Monthly Notices of the Royal Astronomical Society, 2015
We performed spectroscopy of five Luminous Blue Variable (LBV) candidates and two known LBV stars (AE And and Var A-1) in M31. We obtained the same-epoch near-infrared (NIR) and optical spectra of these stars. The NIR spectra were taken with Triplespec spectrograph at the 3.5-m telescope at Apache Point Observatory, and the optical spectroscopy was ...
Sholukhova O., Bizyaev D., Fabrika S., Sarkisyan A., Malanushenko V., Valeev A.   +5 more
openaire   +4 more sources

Reflecting on Our Present Self‐Awareness of Not Having Found Any Life Beyond Earth

Earth and Space Science, Volume 11, Issue 1, January 2024.
Abstract Ever gazed at the stars and wondered if we’re alone? Scientists have been on a quest to find life beyond Earth, but no aliens yet. It’s tough because space is huge, and potential life is incredibly far away, making it difficult to detect their signals. Despite this, our ability to search is improving.
Stuart F. Taylor, Jonathan H. Jiang, Nick Searra, Philip E. Rosen   +3 more
wiley   +1 more source

Dust around Massive Stars Is Agnostic to Galactic Environment: New Insights from PHAT/BEAST

The Astrophysical Journal
Resolving the environments of massive stars is crucial for understanding their formation mechanisms and their impact on galaxy evolution. An important open question is whether massive stars found in diffuse regions outside spiral arms formed in situ or ...
Christina Willecke Lindberg, Claire E. Murray, Julianne J. Dalcanton, J. E. G. Peek, Karl D. Gordon   +4 more
doaj   +1 more source

The distance to the Andromeda galaxy from eclipsing binaries [PDF]

Astronomy and Astrophysics, 2010
7 pages, 3 figures, accepted for publication in A&A (Nov 6, 2009)
Vilardell, F., Ribas, I., Jordi, C., Fitzpatrick, E. L., Guinan, E. F.   +4 more
openaire   +2 more sources