Results 71 to 80 of about 1,426,420 (265)

Molecular hydrogen in galaxies [PDF]

, 1987
This study aims to understand the key role played by molecular hydrogen in the evolution of galaxies, with a view to constraining its radial distribution in the Galaxy and the CO→H(_2) conversion factor α(_20).The star formation rate is shown to be ...
Wilkinson, David Adam, Wilkinson, D.A
core  

Morphology in the era of large surveys [PDF]

, 2013
The study of galaxies has changed dramatically over the past few decades with the advent of large-scale astronomical surveys. These large collaborative efforts have made available high-quality imaging and spectroscopy of hundreds of thousands of systems,
Masters, Karen L., Bamford, S, Simmons, B., Simmons, B, Lintott, Chris, Lintott, Chris J., Bamford, Steven, Bamford, S., Simmons, Brooke, Kaviraj, S., Simmons, Brooke D., Masters, K, Kaviraj, S, Lintott, C, Bamford, Steven P., Lintott, C., Kaviraj, Sugata, Masters, Karen   +17 more
core   +1 more source

Clues to inside-out quenching in quiescent galaxies at 1.2 ≲ z ≲ 2.2: Age, Fe-, and Mg-abundance gradients from JWST-SUSPENSE

Astronomy & Astrophysics
Spatially resolved stellar populations of massive quiescent galaxies at cosmic noon provide powerful insights into star-formation quenching and stellar mass assembly mechanisms.
Cheng Chloe M., Slob Martje, Kriek Mariska, Beverage Aliza G., Barro Guillermo, Bezanson Rachel, de Graaff Anna, Förster Schreiber Natascha M., Lorenz Brian, Marchesini Danilo, Martín-Navarro Ignacio, Muzzin Adam, Newman Andrew B., Price Sedona H., Suess Katherine A., van der Wel Arjen, van de Sande Jesse, van Dokkum Pieter G., Weisz Daniel R.   +18 more
doaj   +1 more source

The Dragonfly Galaxy. III. Jet Brightening of a High-redshift Radio Source Caught in a Violent Merger of Disk Galaxies

The Astrophysical Journal, 2023
The Dragonfly galaxy (MRC 0152-209), the most infrared-luminous radio galaxy at redshift z ∼ 2, is a merger system containing a powerful radio source and large displacements of gas.
Sophie Lebowitz, Bjorn Emonts, Donald M. Terndrup, Joseph N. Burchett, J. Xavier Prochaska, Guillaume Drouart, Montserrat Villar-Martín, Matthew Lehnert, Carlos De Breuck, Joël Vernet, Katherine Alatalo   +10 more
doaj   +1 more source

A 400‐Year Antarctic Ice‐Core Perchlorate Record Reveals Variability in Stratospheric Chlorine Chemistry

Geophysical Research Letters, Volume 53, Issue 18, 28 September 2026.
Abstract Perchlorate (ClO4−) in polar ice preserves past chlorine oxidation chemistry; however, multi‐centennial Antarctic ClO4− records and the mechanisms controlling their variability remain poorly constrained. Here, we present the first 400‐year (1616−2016) ClO4− record from an Antarctic ice core, revealing two regimes separated around 1980.
Wenzhi Zhou, Su Jiang, Zhe Li, Bo Zhang, Danhe Wang, Dongqi Wang, Guitao Shi   +6 more
wiley   +1 more source

Simulating supernova feedback in galaxy disks [PDF]

, 2012
In this thesis I examine supernova feedback in hydrodynamical simulations of galaxy disks. Understanding this process entails the numerical evaluation of cooling in radiative shocks, and we present a set of simulations using two widely used numerical ...
CREASEY, PETER,EDWARD, Creasey, Peter Edward   +1 more
core  

The host of GRB 060206 : kinematics of a distant galaxy [PDF]

, 2008
Context. GRB afterglow spectra are sensitive probes of interstellar matter along the line-of-sight in their host galaxies, as well as in intervening galaxies. The rapid fading of GRBs makes it very difficult to obtain spectra of sufficient resolution and
Rol, E., Wijers, R.A.M.J., Vreeswijk, P. M., Vreeswijk, P M, Levan, A., K. Wiersema (7601723), Kewley, L.J., Starling, R., van der Horst, Alexander, Rol, Evert, Thöne, C.C., Fynbo, Johan Peter Uldall, Thöne, Christina, Ugarte Postigo, A. de, Wiersema, Klaas, Fynbo, J. P. U, Fynbo, J.P.U., N. R. Tanvir (7601726), Wiersema, K, Horst, A. J. van der, Starling, R.L.C., Kewley, L. J., Kewley, Linda, Van Der Horst AJ (7613657), Ledoux, C., Levan, A. J., Levan, Andrew, A. Llorente (7604846), C. Ledoux (7613075), Wijers, R., van der Horst, A., Llorente, A., Starling, Rhaana, Wiersema, K., A. Llorente, P. M. Vreeswijk (7601714), Llorente, A, A. J. Levan (7601735), Ledoux, C, de Ugarte Postigo, A., van der Horst, A.J., R. A. M. J. Wijers (7590200), L. J. Kewley (7621286), Curran, P A, Tanvir, N.R., K. Wiersema, L. J. Kewley, E. Rol, Kewley, Lisa, J. Gorosabel (7603436), Levan, A.J., R. L. C. Starling (7584866), de Ugarte Postigo, A, Tanvir, Nial, P. A. Curran, P. M. Vreeswijk, Starling, R. L. C., Vreeswijk, P., Gorosabel, Javier, J. P. U. Fynbo (7603457), Curran, P. A., Thöne, C., Wijers, Ralph, Fynbo, J. P. U., de Ugarte Postigo, Antonio, A. J. Levan, C. C. Thöne (7613186), De Ugarte Postigo A (7612730), Curran, Peter, J. P. U. Fynbo, Thöne, C. C., Vreeswijk, Paul Marijn, C. Ledoux, Thone, C C, R. A. M. J. Wijers, Wijers, Ralph Antoine Marie Joseph, A. de Ugarte Postigo, Ledoux, Cedric, C. C. Thöne, Curran, P.A., Gorosabel, J., R. L. C. Starling, N. R. Tanvir, J. Gorosabel, Tanvir, Nial R., Vreeswijk, P.M., Starling, R L C, E. Rol (7601738), A. J. van der Horst, Fynbo, J., Tanvir, N., P. A. Curran (7604570), Kewley, L.   +92 more
core   +3 more sources

The MOSDEF-KCWI Survey: Spectral Properties of Lyα Halos around z ∼ 2 Star-forming Galaxies

The Astrophysical Journal
We present Keck Cosmic Web Imager integral field observations of extended Ly α emission in the circumgalactic medium of 27 typical star-forming galaxies at z ∼ 2, drawn from the Multi-Object Spectrometer for Infra-Red Exploration (MOSFIRE) Deep Evolution
Andrew Weldon, Zhiyuan Song, Naveen A. Reddy, Alice E. Shapley   +3 more
doaj   +1 more source

Cosmic Radiation Dose‐Rates for Civil Aviation in the Middle East: Vertical Structure, Solar Modulation, and Comparison With Models

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 17, 16 September 2026.
Abstract High‐altitude balloon measurements were conducted over southern Israel (30°35′N, 34°45′E; 850 m a.s.l., geomagnetic rigidity cutoff 10.3 GV) to characterize the vertical profiles of atmospheric ionization and radiation up to ∼35 km. Six balloon launches between October 2014 and August 2016 recorded the variability of atmospheric ionization ...
Roy Yaniv, Yoav Yair, Colin Price
wiley   +1 more source

Probing molecular motion by double-quantum (13C,13C) solid-state NMR spectroscopy: Application to ubiquitin [PDF]

, 2010
We demonstrate the use of two-dimensional (13C,13C) double-quantum spectroscopy to detect molecular dynamics by solid-state NMR. Data collected on tyrosine-ethylester (TEE) are in line with previously determined (1H,13C) order parameters.
NMR Spectroscopy, Baldus, M., Seidel, K., Schneider, R., Etzkorn, M., Becker, S., Sub NMR Spectroscopy, de Lange, A., Lange, A.   +8 more
core   +2 more sources