Results 41 to 50 of about 12,408 (264)

Bose‐Einstein Condensate Dark Matter Halos Confronted with Galactic Rotation Curves

Advances in High Energy Physics, Volume 2017, Issue 1, 2017., 2017
We present a comparative confrontation of both the Bose‐Einstein Condensate (BEC) and the Navarro‐Frenk‐White (NFW) dark halo models with galactic rotation curves. We employ 6 High Surface Brightness (HSB), 6 Low Surface Brightness (LSB), and 7 dwarf galaxies with rotation curves falling into two classes.
M. Dwornik, Z. Keresztes, E. Kun, L. Á. Gergely, Sergei D. Odintsov   +4 more
wiley   +1 more source

Tidal dwarfs in the M81 group: the second generation? [PDF]

, 2002
We derive quantitative star formation histories of the four suspected tidal dwarf galaxies in the M81 group, HolmbergIX, BK3N, Arp-loop (A0952+69), and Garland, using Hubble Space Telescope/Wide Field Planetary Camera2 images in F606W and F814W obtained ...
Dolphin, A. E., Geisler, D., Grebel, E. K., Guhathakurta, P., Hodge, P. W., Karachentsev, I. D., Karachentseva, V. E., Makarova, L. N., Sarajedini, A., Seitzer, P., Sharina, M. E.   +10 more
core   +1 more source

Coevolution of Dust and Chemistry in Galaxy Simulations with a Resolved Interstellar Medium

The Astrophysical Journal, 2023
Nearby dwarf irregular galaxies are ideal laboratories for studying the interstellar medium (ISM) at low metallicity, which is expected to be common for galaxies at very high redshift being observed by JWST. We present the first high-resolution (∼0.2 pc)
Chia-Yu Hu, Amiel Sternberg, Ewine F. van Dishoeck   +2 more
doaj   +1 more source

The Observer’s Guide to the Gamma‐Ray Burst Supernova Connection

Advances in Astronomy, Volume 2017, Issue 1, 2017., 2017
We present a detailed report of the connection between long‐duration gamma‐ray bursts (GRBs) and their accompanying supernovae (SNe). The discussion presented here places emphasis on how observations, and the modelling of observations, have constrained what we know about GRB‐SNe.
Zach Cano, Shan-Qin Wang, Zi-Gao Dai, Xue-Feng Wu, Josep M. Trigo-Rodríguez   +4 more
wiley   +1 more source

A Comprehensive Archival Search for Counterparts to Ultra-Compact High Velocity Clouds: Five Local Volume Dwarf Galaxies [PDF]

, 2015
We report five Local Volume dwarf galaxies (two of which are presented here for the first time) uncovered during a comprehensive archival search for optical counterparts to ultra-compact high velocity clouds (UCHVCs).
Bennet, P., Caldwell, N., Crnojević, D., Guhathakurta, P., Hargis, J., James, B. L., Koposov, S., McLeod, B., Morrell, N., Olszewski, E., Peacock, M., Salinas, R., Sand, D. J., Seth, A. C., Simon, J. D., Stark, D. P., Strader, J., Tollerud, E. J., Toloba, E., Willman, B.   +19 more
core   +3 more sources

A Young Star Cluster in the Leo a Galaxy

Open Astronomy, 2015
We report a serendipitous discovery of a star cluster in the dwarf irregular galaxy Leo A. Young age (~28 Myr) and low mass (~510 M⊙) estimates are based on the isochrone fit assuming a metallicity derived for HII regions (Z = 0.0007).
Stonkutė R., Narbutis D., Bridžius A., Leščinskaitė A., Vansevičius V.   +4 more
doaj   +1 more source

A turbulence study in Dwarf Irregular galaxies [PDF]

Proceedings of the International Astronomical Union, 2006
AbstractWe present preliminary results of a Fourier transform power spectra analysis carried out on a sample of dwarf irregular galaxies and Local Group members. This project is intended to study turbulence and the ISM structure in irregulars as a class.
Margarita Valdez-Gutiérrez, Ivânio Puerari   +1 more
openaire   +1 more source

UGC 7639: A Dwarf Galaxy in the Canes Venatici I Cloud

Advances in Astronomy, Volume 2015, Issue 1, 2015., 2015
We want to get insight into the formation mechanism and the evolution of UGC 7639, a dwarf galaxy in the Canes Venatici I Cloud (CVnIC). We used archival multiwavelength data to constrain its global properties. Ultraviolet images show that UGC 7639 inner regions are composed mostly by young stellar populations.
L. M. Buson, D. Bettoni, P. Mazzei, G. Galletta, Duncan Forbes   +4 more
wiley   +1 more source

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

Chemical and Photometric Evolution Models for Disk, Irregular, and Low Mass Galaxies

Advances in Astronomy, Volume 2014, Issue 1, 2014., 2014
We summarize the updated set of multiphase chemical evolution models performed with 44 theoretical radial mass initial distributions and 10 possible values of efficiencies to form molecular clouds and stars. We present the results about the infall rate histories, the formation of the disk, and the evolution of the radial distributions of diffuse and ...
Mercedes Mollá, Jorge Iglesias Páramo
wiley   +1 more source