Results 161 to 170 of about 666,750 (380)

Cool Gas in High-Redshift Galaxies [PDF]

, 2013
Over the past decade, observations of the cool interstellar medium (ISM) in distant galaxies via molecular and atomic fine structure line (FSL) emission have gone from a curious look into a few extreme, rare objects to a mainstream tool for studying ...
C. Carilli, F. Walter
semanticscholar   +1 more source

A Possible Origin of Magnetic Fields in Galaxies and Clusters: Strong Magnetic fields at z~10?

, 2005
We propose that strong magnetic fields should be generated at shock waves associated with formation of galaxies or clusters of galaxies by the Weibel instability, an instability in collisionless plasmas.
Fujita, Yutaka, Kato, Tsunehiko N.
core   +1 more source

Exploring Dark Photon Production and Kinetic Mixing Constraints in Heavy‐Ion Collisions

Astronomische Nachrichten, Volume 346, Issue 3-4, March-May 2025.
ABSTRACT Vector U‐bosons, often referred to as “dark photons,” are potential candidates for mediating dark matter interactions. In this study, we outline a procedure to derive theoretical constraints on the upper bound of the kinetic mixing parameter ϵ2MU$$ {\upvarepsilon}^2\left({M}_U\right) $$ using dilepton data from heavy‐ion from SIS to RHIC ...
Adrian William Romero Jorge, Elena Bratkovskaya, Taesoo Song, Laura Sagunski   +3 more
wiley   +1 more source

Detection of high Lyman continuum leakage from four low-redshift compact star-forming galaxies [PDF]

, 2016
Following our first detection reported in Izotov et al. (2016), we present the detection of Lyman continuum (LyC) radiation of four other compact star-forming galaxies observed with the Cosmic Origins Spectrograph (COS) onboard the Hubble Space Telescope
Y. Izotov, D. Schaerer, T. Thuan, G. Worseck, N. Guseva, I. Orlitová, A. Observatory, Ukrainian National Academy of Sciences, Kyiv, Ukraine, Observatoire de Geneve, Versoix, Switzerland., Irapcnrs, Toulouse, France., A. Department, U. Virginia, Charlottesville, Usa, M. Astronomie, Heidelberg, H Germany, A. Institute, C. A. O. Sciences, Prague, Czech Republic   +26 more
semanticscholar   +1 more source

The Magnitude-Size Relation of Galaxies out to z ~ 1

, 1999
As part of the Deep Extragalactic Evolutionary Probe (DEEP) survey, a sample of 190 field galaxies (I_{814} 0.7), a handful of luminous, high surface brightness galaxies appears that occupies a region of the magnitude-size plane rarely populated by ...
Andrew C. Phillips, David C. Koo, Gallagher J. S., III, Garth D. Illingworth, K. L. Wu, Karl Gebhardt, Luc Simard, Nicole P. Vogt, S. M. Faber, Vicki L. Sarajedini   +9 more
core   +1 more source

Can We Draw Conclusions on Supernova Shock Wave Propagation Using Short‐Lived Radioactive Isotopes?

Astronomische Nachrichten, Volume 346, Issue 3-4, March-May 2025.
ABSTRACT We run a three‐dimensional Galactic chemical evolution (GCE) model to follow the propagation of 53Mn (exclusively produced from type Ia supernovae, SNIa), 60Fe (exclusively produced from core‐collapse supernovae, CCSNe), 182Hf (exclusively produced from intermediate mass stars, IMSs), and 244Pu (exclusively produced from neutron star mergers ...
Benjamin Wehmeyer, Andrés Yagüe López, Benoit Côté, Maria K. Petö, Chiaki Kobayashi, Maria Lugaro   +5 more
wiley   +1 more source

Galaxy Zoo: morphologies derived from visual inspection of galaxies from the Sloan Digital Sky Survey [PDF]

, 2008
In order to understand the formation and subsequent evolution of galaxies one must first distinguish between the two main morphological classes of massive systems: spirals and early-type systems.
C. Lintott, K. Schawinski, A. Slosar, K. Land, S. Bamford, D. Thomas, M. Raddick, R. Nichol, A. Szalay, D. Andreescu, P. Murray, J. V. D. Berg   +11 more
semanticscholar   +1 more source

Gas rich galaxies from the FIGGS survey

, 2007
The FIGGS (Faint Irregular Galaxy GMRT Survey) is aimed at creating a multi-wavelength observational data base for a volume limited sample of the faintest gas rich galaxies.
A. Begum, A. Begum, A. Begum, A. Begum, A. Begum, A. Begum, A.M.N. Ferguson, B.E. Warren, G. Gentile, G. Swarup, I.D. Karachentsev, K.Y. Lo, O.Y. Gnedin, R. Braun   +13 more
core   +1 more source

Galaxies and Cladistics [PDF]

, 2009
The Hubble tuning fork diagram, based on morphology and established in the 1930s, has always been the preferred scheme for classification of galaxies. However, the current large amount of multiwavelength data, most often spectra, for objects up to very high distances, asks for more sophisticated statistical approaches.
openaire   +5 more sources

A Slowly Pulsating Run‐Away B Star at High Galactic Latitude Ejected From a Spiral Arm

Astronomische Nachrichten, EarlyView.
ABSTRACT We report the discovery of the young B6 V run‐away star LAMOST J083323.18 + 430825.4, 2.5 kpc above the Galactic plane. Its atmospheric parameters and chemical composition are determined from LAMOST spectra, indicating normal composition. Effective temperature (Teff$$ {T}_{\mathrm{eff}} $$ = 14,500$$ \mathrm{14,500} $$ K) and gravity (logg ...
Ulrich Heber, Maximilian Halenke, Aakash Bhat, Veronika Schaffenroth   +3 more
wiley   +1 more source