Results 41 to 50 of about 67,078 (219)

JWST Imaging of the Closest Globular Clusters—VI. The Lowest‐Mass Objects in M 4 and the Galactic Bulge

Astronomische Nachrichten, Volume 346, Issue 9, November 2025.
ABSTRACT We present James Webb Space Telescope observations of M 4—the closest globular cluster—that probe the lower Main Sequence down to the hydrogen‐burning limit. The unveiled stellar sequence reaches much fainter luminosities than previously possible, revealing a few extremely red objects that are consistent with brown dwarfs as cool as Teff∼1000K$
L. R. Bedin, R. Gerasimov, A. Calamida, M. Libralato, M. Scalco, D. Nardiello, M. Griggio, D. Apai, J. Anderson, A. Bellini, A. Burgasser   +10 more
wiley   +1 more source

Black holes in the low-mass galaxy regime

Astronomy & Astrophysics
Context. Active galactic nuclei (AGNs) have been observed in dwarf galaxies, yet the impact of black hole feedback in these low-mass systems remains unclear. Aims.
Flores-Freitas R., Wylezalek D., Trevisan M., Albán M., Riffel R. A., Bertemes C., Schnorr-Müller A., Riffel R., Dall’Agnol de Oliveira B., Kukreti P.   +9 more
doaj   +1 more source

Searching for tidal tails - investigating galaxy harassment

, 2005
Galaxy harassment has been proposed as a physical process that morphologically transforms low surface density disc galaxies into dwarf elliptical galaxies in clusters.
Aboufadel, Babul, Bernstein, Binggeli, Butcher, Calcaneo-Roldan, Conselice, Dekel, Dressler, Efstathiou, Feldmeier, Ferguson, Gregg, Henriksen, J. I. Davies, Kambas, Klypin, Kogut, Mateo, Moore, Moore, Moore, Moore, Roberts, S. Roberts, S. Sabatini, Sabatini, Sabatini, Trentham, Trentham, Tully   +30 more
core   +1 more source

HEAD IN THE STARS, FEET ON THE GROUND: Scale and Astronomy Initiatives in Southern Africa

Cultural Anthropology, Volume 40, Issue 4, Page 571-596, November 2025.
ABSTRACT This article explores the evolution of radio astronomy in South Africa and Madagascar, focusing on how “scale” functions as both a way of understanding the world and marking differences in existence. In outer space research, the ground is crucial but often overlooked.
HANNA NIEBER, DAVIDE CHINIGÒ
wiley   +1 more source

Birth, life and survival of Tidal Dwarf Galaxies

, 2011
Advances on the formation and survival of the so-called Tidal Dwarf Galaxies (TDGs) are reviewed. The understanding on how objects of the mass of dwarf galaxies may form in debris of galactic collisions has recently benefited from the coupling of multi ...
BG Elmegreen, BJ Smith, D Pfenniger, F Bournaud, F Bournaud, F Bournaud, F Bournaud, F Renaud, G Gentile, IA Grenier, J Braine, JE Barnes, JE Hibbard, JI Read, KA Knierman, M Boquien, M Fellhauer, M Metz, M Milgrom, M Wetzstein, PA Duc, PA Duc, R Teyssier, S. Torres-Flores, T Okazaki, Y Yang   +25 more
core   +1 more source

Dark satellites and the morphology of dwarf galaxies [PDF]

, 2012
One of the strongest predictions of the LambdaCDM cosmological model is the presence of dark satellites orbiting all types of galaxies. We focus here on the dynamical effects of such satellites on disky dwarf galaxies, and demonstrate that these ...
Bergvall, Blanton, Font, Geha, Hopkins, Karachentsev, Kazantzidis, Kazantzidis, McGaugh, Mo, Moore, Moster, Purcell, Robertson, Starkenburg, Walker, Yoachim   +16 more
core   +2 more sources

Tools for Learning—Promoting Reflection for Student Teachers' Development of PCK

Journal of Research in Science Teaching, Volume 62, Issue 8, Page 1902-1922, October 2025.
ABSTRACT This paper investigates how the coherent integration of three different tools for reflection during a science methods course can contribute to student teachers' planning and enactment of science teaching, that is, their development of pedagogical content knowledge (PCK).
Pernilla Nilsson, Anne‐Marie Cederqvist   +1 more
wiley   +1 more source

A MARVEL-ous Study of How Well Galaxy Shapes Reflect Dark Matter Halo Shapes in Cold Dark Matter Simulations

The Astrophysical Journal
We present a 3D shape analysis of both dark matter (DM) and stellar matter (SM) in simulated dwarf galaxies to determine whether stellar shape traces DM shape. Using 80 central and satellite dwarf galaxies from three simulation suites (“Marvelous Massive
Blake Keith, Ferah Munshi, Alyson M. Brooks, Jordan Van Nest, Anna Engelhardt, Akaxia Cruz, Ben Keller, Thomas Quinn, James Wadsley   +8 more
doaj   +1 more source

Star Formation History of Dwarf Galaxies in Cosmological Hydrodynamic Simulations

Advances in Astronomy, 2010
We examine the past and current work on the star formation (SF) histories of dwarf galaxies in cosmological hydrodynamic simulations. The results obtained from different numerical methods are still somewhat mixed, but the differences are understandable ...
Kentaro Nagamine
doaj   +1 more source

The HI column density distribution function in faint dwarf galaxies

, 2012
We present the HI column density distribution function,\fnh, as measured from dwarf galaxies observed as part of the Faint Irregular Galaxy GMRT (FIGGS) survey.
Begum, Ayesha, Chengalur, Jayaram N., Patra, Narendra Nath   +2 more
core   +1 more source