Results 51 to 60 of about 339,165 (211)

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

Advances in Astronomy, 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
L. M. Buson, D. Bettoni, P. Mazzei, G. Galletta   +3 more
doaj   +1 more source

Ultradiffuse galaxies: the high-spin tail of the abundant dwarf galaxy population [PDF]

, 2016
Recent observations have revealed the existence of an abundant population of faint, low surface brightness (SB) galaxies, which appear to be numerous and ubiquitous in nearby galaxy clusters, including the Virgo, Coma and Fornax clusters.
N. Amorisco, Abraham Loeb
semanticscholar   +1 more source

Stellar streams around dwarf galaxies in the local Universe

Astronomy & Astrophysics
Context. While mergers between massive galaxies and their dwarf satellites have been well studied, the properties of dwarf–dwarf satellite mergers are not well constrained.
Sakowska Joanna D., Martínez-Delgado David, Pearson Sarah, Riquel-Castilla Francisco J., Starkenburg Tjitske K., Donatiello Giuseppe, Deason Alis, Erkal Denis, Taylor Ethan D.   +8 more
doaj   +1 more source

R-process enrichment from a single event in an ancient dwarf galaxy [PDF]

Nature, 2015
Elements heavier than zinc are synthesized through the rapid (r) and slow (s) neutron-capture processes. The main site of production of the r-process elements (such as europium) has been debated for nearly 60 years.
A. Ji, A. Frebel, A. Chiti, J. Simon
semanticscholar   +1 more source

A Comparison of Outflow Properties in AGN Dwarfs versus Star-forming Dwarfs

The Astrophysical Journal, 2023
Feedback likely plays a crucial role in resolving discrepancies between observations and theoretical predictions of dwarf galaxy properties. Stellar feedback was once believed to be sufficient to explain these discrepancies, but it has thus far failed to
Archana Aravindan, Weizhe Liu, Gabriela Canalizo, Sylvain Veilleux, Thomas Bohn, Remington O. Sexton, David S. N. Rupke, Vivian U   +7 more
doaj   +1 more source

Dwarf elliptical galaxies

The Astrophysical Journal, 1983
We propose that dwarf elliptical galaxies are the bound remnants of more massive stellar systems, such as a parent galaxy which has lost more than half its mass in gas ejection during a burst of star formation, or an unbound tidal debris produced during the interaction of two giant galaxies.
H. Gerola, P. Carnevali, E. E. Salpeter
openaire   +1 more source

ANGULAR MOMENTUM OF DWARF GALAXIES [PDF]

The Astrophysical Journal Letters, 2016
ABSTRACT We present measurements of baryonic mass and specific angular momentum (sAM) in 14 rotating dwarf Irregular (dIrr) galaxies from the LITTLE THINGS sample.
Kirsty M. Butler, Danail Obreschkow, Se-Heon Oh   +2 more
openaire   +2 more sources

Dark matter constraints from a joint analysis of dwarf Spheroidal galaxy observations with VERITAS [PDF]

, 2017
We present constraints on the annihilation cross section of weakly interacting massive particles dark matter based on the joint statistical analysis of four dwarf galaxies with VERITAS.
V. C. S. Archambault, A. Archer, W. Benbow, R. Bird, E. Bourbeau, T. Brantseg, M. Buchovecky, J. Buckley, V. Bugaev, K. Byrum, M. Cerruti, J. Christiansen, M. Connolly, W. Cui, M. Daniel, Q. Feng, J. Finley, H. Fleischhack, L. Fortson, A. Furniss, A. Geringer-Sameth, S. Griffin, J. Grube, M. Hutten, N. Haakansson, D. Hanna, O. Hervet, J. Holder, G. Hughes, C. Johnson, P. Kaaret, P. Kar, N. Kelley-Hoskins, M. Kertzman, D. Kieda, S. Koushiappas, M. Krause, S. Kumar, M. Lang, T. T. Lin, S. McArthur, P. Moriarty, D. Nieto, S. O’Brien, R. Ong, A. Otte, N. Park, M. Pohl, A. Popkow, E. Pueschel, J. Quinn, K. Ragan, P. Reynolds, G. Richards, E. Roache, C. Rulten, I. Sadeh, M. Santander, G. Sembroski, K. Shahinyan, A. Smith, D. Staszak, I. Telezhinsky, S. Tr'epanier, J. Tucci, J. Tyler, S. Wakely, A. Weinstein, P. Wilcox, D. Williams, B. Department, M. University, Montreal, D. Physics, W. University, S. Louis, Mó, Fred Lawrence Whipple Observatory, H. C. F. Astrophysics, Amado, Az, Astronomy, U. California, L. Angeles, Ca, I. S. University, Ames, Ia, A. N. Laboratory, Argonne, Il, P. Department, California Polytechnic State University, S. Obispo, S. O. Physics, National University of Ireland Galway, University Road, Galway., Ireland, Purdue University, W. Lafayette, In, Center for Computational Astrophysics, Tsinghua University, Beijing, Desy, Zeuthen, H Germany, U. Minnesota, Minneapolis, Mn, California Bay, Hayward, Brown University, Providence, Ri, Stevens Institute of Technology, Hoboken, Nj, I. O. Physics, U. Potsdam, Santa Cruz Institute for Particle Physics, Santa Cruz, T. B. R. Institute, U. Delaware, Newark, De, U. Iowa, Van Allen Hall, Iowa City, U. Utah, Salt lake City, Ut, D. University, Greencastle, Columbia University, New York., Ny, University College Dublin, Center for Computational Astrophysics, G. I. O. Technology, Atlanta, Ga, Enrico Fermi Institute, U. Chicago, Chicago., D. Sciences, C. I. O. Technology, Cork, Barnard College, U. Maryland, College Park Nasa Gsfc, College Park, Md.   +153 more
semanticscholar   +1 more source

The Pristine dwarf galaxy survey–V. The edges of the dwarf galaxy Hercules

Monthly Notices of the Royal Astronomical Society, 2023
ABSTRACT We present a new spectroscopic study of 175 stars in the vicinity of the dwarf galaxy Hercules (d ∼ 132 kpc) with data from the Anglo-Australian Telescope and its AAOmega spectrograph together with the Two Degree Field multi-object system to solve the conundrum that whether Hercules is tidally disrupting.
Nicolas Longeard, Pascale Jablonka, Giuseppina Battaglia, Khyati Malhan, Nicolas Martin, Rubén Sánchez-Janssen, Federico Sestito, Else Starkenburg, Kim A Venn   +8 more
openaire   +3 more sources

Quantifying Bursty Star Formation in Dwarf Galaxies

The Open Journal of Astrophysics
Dwarf galaxy star formation histories are theoretically expected to be bursty, potentially leaving distinct imprints on their chemical evolution. We propose that episodic starbursts with quiescent periods longer than ~100 Myr should lead to discontinuous
Yuan-Sen Ting, Alexander Ji
doaj   +1 more source