Results 71 to 80 of about 12,786 (266)

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

Whiting 1: Confirmation of its accretion by the Milky Way

EPJ Web of Conferences, 2017
We investigate the association of Whiting 1 with the Sagittarius tidal stream by obtaining radial velocities for a sample of 101 stars observed with VIMOS.
Carballo-Bello Julio A., Corral-Santana Jesús M., Martínez-Delgado David, Sollima Antonio, Muñoz Ricardo R., Duffau Sonia, Catelan Márcio   +6 more
doaj   +1 more source

Deep photometry of the Draco dwarf spheroidal galaxy [PDF]

The Astronomical Journal, 1986
We report the results of deep CCD photometry of two overlapping fields in the Draco dwarf spheroidal galaxy. We find (B-V)o,g = m0.69, indicating a mean [Fe/H] = −2.0. The width of the giant branch below the horizontal branch is somewhat wider than our observational errors permit, from which we infer there is a spread in metallicities amongst the Draco
Bruce W. Carney, P. Seitzer
openaire   +1 more source

Implications and Applications of Kinematic Galaxy Scaling Relations

International Scholarly Research Notices, Volume 2012, Issue 1, 2012., 2012
Galaxy scaling relations, which describe a connection between ostensibly unrelated physical characteristics, testify to an underlying order in galaxy formation that requires understanding. I review the development of a scaling relation that (1) unites the well‐known fundamental plane (FP) relation of giant elliptical galaxies and Tully‐Fisher (TF ...
Dennis Zaritsky, J. A. L. Aguerri, P. Salucci   +2 more
wiley   +1 more source

Dwarf spheroidal galaxy kinematics and spiral galaxy scaling laws [PDF]

Monthly Notices of the Royal Astronomical Society, 2011
Los estudios cinemáticos de los satélites esferoidales enanos (dSph) de la Vía Láctea están revelando indicios tentadores sobre la estructura de los halos de materia oscura (DM) en el extremo de baja masa de la función de luminosidad de la galaxia. En el extremo brillante, el modelado de galaxias espirales ha demostrado que sus curvas de rotación son ...
Paolo Salucci, M. I. Wilkinson, Matthew G. Walker, G. Gilmore, Eva K. Grebel, Andreas Koch, Christiane Frigerio Martins, Rosemary F. Ġ. Wyse   +7 more
openaire   +3 more sources

An Analytical Galactic Chemical Evolution Model with Gas Inflow and a Terminal Wind

The Astrophysical Journal
We present a new analytical galactic chemical evolution (GCE) model with gas inflow, internally caused outflow, and extra gas loss after a period of time. The latter mimics the ram pressure stripping of a dwarf satellite galaxy near the pericenter of its
Kateryna A. Kvasova, Evan N. Kirby
doaj   +1 more source

Exploring the Structures and Substructures of the Andromeda Satellite Dwarf Galaxies Cassiopeia III, Perseus I, and Lacerta I

The Astronomical Journal, 2023
We present results from wide-field imaging of the resolved stellar populations of the dwarf spheroidal galaxies Cassiopeia III (And XXXII) and Perseus I (And XXXIII), two satellites in the outer stellar halo of the Andromeda galaxy (M31).
Katherine L. Rhode, Nicholas J. Smith, Denija Crnojevic, David J. Sand, Ryan A. Lambert, Enrico Vesperini, Madison V. Smith, Steven Janowiecki, John J. Salzer, Ananthan Karunakaran, Kristine Spekkens   +10 more
doaj   +1 more source

Origin of structural and kinematical properties of the Small Magellanic Cloud

, 2009
We investigate structural, kinematical, and chemical properties of stars and gas in the Small Magellanic Cloud (SMC) interacting with the Large Magellanic Cloud (LMC) and the Galaxy based on a series of self-consistent chemodynamical simulations.
Bekki, Binney, Broeils, Brüns, Cioni, Hatzidimitriou, Idiart, Kato, Kenji Bekki, Masashi Chiba, Monaghan, Murai, Noguchi, Spite   +13 more
core   +1 more source

The dwarf spheroidal galaxy Andromeda I

The Astrophysical Journal, 1990
Images of Andromeda I in the visual and near-infrared show a giant branch characteristic of galactic globular clusters of intermediate metallicity. The distance of the galaxy is estimated from the tip of the giant branch to be 790 + or - 60 kpc. The physical dimensions and luminosity are similar to those of the dwarf spheroidal in Sculptor. There is no
Jeremy Mould, Jerome Kristian
openaire   +1 more source

Searching for dark-matter induced neutrino signals in dwarf spheroidal galaxies using 10 years of IceCube public data [PDF]

, 2023
Xue-Kang Guo, Yi-Fei Lü, Yongbo Huang, Rong-Lan Li, Ben-Yang Zhu, Yun-Feng Liang   +5 more
openalex   +1 more source