Results 61 to 70 of about 1,735 (217)

Properties of the Photometric Components of Lenticular Galaxies

Advances in Astronomy, Volume 2012, Issue 1, 2012., 2012
After almost one century since their definition, the origin of lenticular galaxies is still a matter of debate. Several formation processes have been proposed in order to explain the wide variety of their observational properties. These properties could indicate that the class of lenticulars is a family formed by galaxies with different formations and ...
J. Alfonso L. Aguerri, Elias Brinks
wiley   +1 more source

Dwarf Spheroidal Galaxies in the M101 Group and Behind it [PDF]

Astrophysics, 2019
published in Astrophysics, v.62, p.293 ...
Karachentsev, I. D., Makarova, L. N.
openaire   +2 more sources

Dark Matter Limits from Dwarf Spheroidal Galaxies with the HAWC Gamma-Ray Observatory [PDF]

, 2018
© 2018. The American Astronomical Society. All rights reserved. The High Altitude Water Cherenkov (HAWC) gamma-ray observatory is a wide field of view observatory sensitive to 500 GeV-100 TeV gamma-rays and cosmic rays.
Carramiñana, A., Becerril, A., Ellsworth, R. W., Bautista-Elivar, N., Rojas, D. Avila, Casanova, S., Brisbois, C., Braun, J., Arceo, R., Caballero-Mora, K. S., Duvernois, M. A., Hernandez, R. DIaz, Albert, A., León, S. Coutiño De, DIngus, B. L., Alfaro, R., Castillo, M., Alvarez, C., Bernal, A., Cotzomi, J., Cotti, U., León, C. De, Engel, K., Belmont-Moreno, E., Solares, H. A.Ayala, Fuente, E. De La, DÍaz-Vélez, J. C., Arteaga-Velázquez, J. C., Benzvi, S. Y., Capistrán, T., Fiorino, D. W., Álvarez, J. D.   +31 more
core   +1 more source

Search for dark matter annihilation signatures in H.E.S.S. observations of dwarf spheroidal galaxies [PDF]

, 2014
Dwarf spheroidal galaxies of the Local Group are close satellites of the Milky Way characterized by a large mass-to-light ratio and are not expected to be the site of nonthermal high-energy gamma-ray emission or intense star formation.
Böttcher, M., Spanier, F., H.E.S.S. Collaboration, Ivascenko, A., Abramowski, A., Venter, C., Sushch, I., Pekeur, N.W., Davids, I.D., Krüger, P.P., Vorster, M.   +10 more
core   +4 more sources

Annihilating dark matter search with 12 years of Fermi LAT data in nearby galaxy clusters

SciPost Physics Proceedings, 2023
Galaxy clusters contain an abundance of dark matter making them attractive laboratories for indirect DM searches. This work details a search for signals of pair annihilation from WIMP dark matter in the GeV gamma ray regime.
Charles Thorpe-Morgan, D. Malyshev, C.-A. Stegen, Andrea Santangelo, J. Jochum
doaj   +1 more source

Advancing rare cancer research by MALDI mass spectrometry imaging: Applications, challenges, and future perspectives in sarcoma

PROTEOMICS, Volume 24, Issue 12-13, June 2024.
Abstract MALDI mass spectrometry imaging (MALDI imaging) uniquely advances cancer research, by measuring spatial distribution of endogenous and exogenous molecules directly from tissue sections. These molecular maps provide valuable insights into basic and translational cancer research, including tumor biology, tumor microenvironment, biomarker ...
Maren Nicole Stillger, Mujia Jenny Li, Pia Hönscheid, Cläre von Neubeck, Melanie Christine Föll   +4 more
wiley   +1 more source

Are Nuclear Star Clusters the Precursors of Massive Black Holes?

Advances in Astronomy, Volume 2012, Issue 1, 2012., 2012
We present new upper limits for black hole masses in extremely late type spiral galaxies. We confirm that this class of galaxies has black holes with masses less than 106M⊙, if any. We also derive new upper limits for nuclear star cluster masses in massive galaxies with previously determined black hole masses.
Nadine Neumayer, C. Jakob Walcher, Francesca Civano   +2 more
wiley   +1 more source

Updated Bounds on Axion‐Like Particle Dark Matter with the Optical MUSE‐Faint Survey

Annalen der Physik, Volume 536, Issue 1, January 2024.
This study presents bounds on the axion‐like particle (ALP) to two‐photon coupling in the mass range $2.65‐5.27$ eV. The signal from ALP decay are sought in the Multi Unit Spectroscopic Explorer (MUSE) observations of five dwarf spheroidal galaxies, under the assumption that ALPs make up the whole dark matter.
Elisa Todarello
wiley   +1 more source

Pulsar‐Driven Jets in Supernovae, Gamma‐Ray Bursts, and the Universe

Advances in Astronomy, Volume 2012, Issue 1, 2012., 2012
The bipolarity of Supernova 1987A can be understood through its very early light curve from the CTIO 0.4 m telescope and IUE FES and following speckle observations of the “Mystery Spot”. These indicate a beam/jet of light/particles, with initial collimation factors >104 and velocities >0.95 c, involving up to 10−5 M⊙ interacting with circumstellar ...
John Middleditch, Alberto J. Castro-Tirado   +1 more
wiley   +1 more source

Search for HI in Dwarf Spheroidal Galaxies [PDF]

, 1999
After reviewing the HI content and distribution in extreme dwarf irregular (dIrr) and dwarf elliptical (dE) galaxies, previous searches for HI in dwarf spheroidal (dSph) galaxies will be discussed.
Claude Carignan
core   +1 more source