Results 51 to 60 of about 64,574 (197)

Metallic Winds in Dwarf Galaxies [PDF]

The Astrophysical Journal, 2017
Abstract We present results from models of galactic winds driven by energy injected from nuclear (at the galactic center) and non-nuclear starbursts. The total energy of the starburst is provided by very massive young stellar clusters, which can push the galactic interstellar medium and produce an important outflow. Such outflow can be a
F. Robles-Valdez, A. Rodríguez-González, L. Hernández-Martínez, A. Esquivel   +3 more
openaire   +3 more sources

The Dwarf Galaxy Population of the Dorado group down to Mv=-11 [PDF]

, 2000
We present V and I CCD photometry of suspected low-surface brightness dwarf galaxies detected in a survey covering ~2.4 deg^2 around the central region of the Dorado group of galaxies.
Binggeli B., Binggeli B., Cláudia Mendes de Oliveira, de Block W., Drinkwater M. J., Eleazar R. Carrasco, Infante L., Irwin M., Leopoldo Infante, Lorrimer S. J., Michael Bolte, Shakhbazian R. K.   +11 more
core   +2 more sources

Overmassive Black Holes in Dwarf Galaxies Out to z ∼ 0.9 in the VIPERS Survey

The Astrophysical Journal Letters, 2023
Supermassive black holes (SMBHs) are thought to originate from early universe seed black holes of mass M _BH ∼ 10 ^2 –10 ^5 M _⊙ and grown through cosmic time. Such seeds could be powering the active galactic nuclei (AGN) found in today’s dwarf galaxies.
Mar Mezcua, Malgorzata Siudek, Hyewon Suh, Rosa Valiante, Daniele Spinoso, Silvia Bonoli   +5 more
doaj   +1 more source

On the dynamics of the Sagittarius dwarf galaxy [PDF]

Monthly Notices of the Royal Astronomical Society, 1995
We use numerical simulations to test the feasibility of the suggestion by Ibata et al. (1994) that the excess population of stars which they discovered in the Sagittarius region may be the disrupted remains of a dwarf spheroidal galaxy. We find that a Fornax-like model for the pre-disruption system can indeed reproduce the data.
Hector Velazquez, Simon D. M. White
openaire   +2 more sources

Star formation histories of dwarf galaxies in the FIRE simulations: dependence on mass and Local Group environment [PDF]

, 2019
We study star formation histories (SFHs) of $\simeq500$ dwarf galaxies (stellar mass $M_\ast = 10^5 - 10^9\,M_\odot$) from FIRE-2 cosmological zoom-in simulations.
Boylan-Kolchin, Michael, Bullock, James S., Chan, T. K., El-Badry, Kareem, Faucher-Giguere, Claude-Andre, Feldmann, Robert, Fitts, Alex, Garrison-Kimmel, Shea, Graus, Andrew, Hayward, Christopher, Hopkins, Phillip F., Keres, Dusan, Samuel, Jenna, Sanderson, Robyn, Wetzel, Andrew, Wheeler, Coral   +15 more
core   +4 more sources

Environment Matters: Predicted Differences in the Stellar Mass–Halo Mass Relation and History of Star Formation for Dwarf Galaxies

The Astrophysical Journal
We are entering an era in which we will be able to detect and characterize hundreds of dwarf galaxies within the Local Volume. It is already known that a strong dichotomy exists in the gas content and star formation properties of field dwarf galaxies ...
Charlotte R. Christensen, Alyson M. Brooks, Ferah Munshi, Claire Riggs, Jordan Van Nest, Hollis Akins, Thomas R. Quinn, Lucas Chamberland   +7 more
doaj   +1 more source

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

Astronomische Nachrichten, EarlyView.
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

The cores of dwarf galaxy haloes [PDF]

Monthly Notices of the Royal Astronomical Society, 1996
We use N-body simulations to examine the effects of mass outflows on the density profiles of cold dark matter (CDM) halos surrounding dwarf galaxies. In particular, we investigate the consequences of supernova-driven winds that expel a large fraction of the baryonic component from a dwarf galaxy disk after a vigorous episode of star formation.
Julio F. Navarro, Julio F. Navarro, Vincent R. Eke, Carlos S. Frenk   +3 more
openaire   +3 more sources

The rotation curves shapes of late-type dwarf galaxies [PDF]

, 2008
We present rotation curves derived for a sample of 62 late-type dwarf galaxies that have been observed as part of the Westerbork HI Survey of Spiral and Irregular Galaxies (WHISP) project.
Begeman, Begum, Blais-Ouellette, Bosma, Bosma, Bottema, Broeils, Bullock, Casertano, Catinella, Corradi, Côté, de Blok, de Blok, de Blok, de Blok, Ford, García-Ruiz, Garrido, Hunter, J. M. van der Hulst, Kent, Kent, Kregel, Kuzio de Naray, Marchesini, McGaugh, Navarro, Navarro, Noordermeer, Persic, Persic, Power, Puche, R. A. Swaters, R. Sancisi, Rhee, Rubin, Sancisi, Sicotte, Sicotte, Simon, Spekkens, Spekkens, Swaters, Swaters, Swaters, Swaters, Swaters, Swaters, Swaters, T. S. van Albada, Tully, van den Bosch, van den Bosch, Verheijen   +55 more
core   +2 more sources

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

Journal of Research in Science Teaching, EarlyView.
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