Results 101 to 110 of about 34,781 (306)

The DECam MAGIC Survey: A Wide-field Photometric Metallicity Study of the Sculptor Dwarf Spheroidal Galaxy

The Astrophysical Journal
The metallicity distribution function (MDF) and internal chemical variations of a galaxy are fundamental to understand its formation and assembly history.
F. O. Barbosa, A. Chiti, G. Limberg, A. B. Pace, W. Cerny, S. Rossi, J. L. Carlin, G. S. Stringfellow, V. M. Placco, K. Atzberger, J. A. Carballo-Bello, A. Chaturvedi, Y. Choi, D. Crnojević, A. Drlica-Wagner, A. P. Ji, N. Kallivayalil, C. E. Martínez-Vázquez, G. E. Medina, N. E. D. Noël, A. H. Riley, D. J. Sand, A. K. Vivas, C. R. Bom, P. S. Ferguson, B. Mutlu-Pakdil, M. Navabi, J. D. Sakowska, A. Zenteno, (MAGIC & DELVE Collaborations)   +29 more
doaj   +1 more source

On Dwarf Galaxies as the Source of Intracluster Gas [PDF]

, 1996
Recent observational evidence for steep dwarf galaxy luminosity functions in several rich clusters has led to speculation that their precursors may be the source of the majority of gas and metals inferred from intracluster medium (ICM) x-ray observations.
Arimoto N., Arnaud M., B. K. Gibson, Babul A., Bower R. G., Driver S. P., Elbaz D., F. Matteucci, Gibson B. K., Gibson B. K., Gibson B. K., Gibson B. K., Greggio L., Larson R. B., Matteucci F., Matteucci F., Matteucci F., Matteucci F., Melnick J., Mihara K., Mitchell R. J., Okazaki Y., Pastor J., Renzini A., Sarazin C. L., Schaller G., Sil'chenko O. K., Terlevich R., Yoshii Y.   +28 more
core   +3 more sources

Space Motions of the Dwarf Spheroidal Galaxies Draco and Sculptor Based on HST Proper Motions with a ∼10 yr Time Baseline [PDF]

, 2017
We present new proper motion (PM) measurements of the dwarf spheroidal galaxies (dSphs) Draco and Sculptor using multiepoch images obtained with the Hubble Space Telescope ACS/WFC.
S. Sohn, E. Patel, G. Besla, R. P. van der Marel, J. Bullock, L. Strigari, G. van de Ven, M. Walker, A. Bellini   +8 more
semanticscholar   +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

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

Radio-Frequency Searches for Dark Matter in Dwarf Galaxies

Galaxies, 2019
Dwarf spheroidal galaxies have long been discussed as optimal targets for indirect dark matter searches. However, the majority of such studies have been conducted with gamma-ray instruments.
Geoff Beck
doaj   +1 more source

Phase-space mass bound for fermionic dark matter from dwarf spheroidal galaxies [PDF]

, 2017
We reconsider the lower bound on the mass of a fermionic dark matter (DM) candidate resulting from the existence of known small Dwarf Spheroidal galaxies, in the hypothesis that their DM halo is constituted by degenerate fermions, with phase-space ...
Chiara Di Paolo, F. Nesti, F. Villante
semanticscholar   +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