Results 11 to 20 of about 1,488 (191)

Estimating extragalactic Faraday rotation [PDF]

, 2015
Observations of Faraday rotation for extragalactic sources probe magnetic fields both inside and outside the Milky Way. Building on our earlier estimate of the Galactic contribution, we set out to estimate the extragalactic contributions.
M. Greiner, Gaensler, B., N. Oppermann, V. Vacca, Akahori, T., M. Johnston-Hollitt, VACCA, VALENTINA, Vacca, V., T. Akahori, Carretti, E., Harvey-Smith, L., L. Harvey-Smith, E. Carretti, Johnston-Hollitt, M., H. Junklewitz, Pratley, L., Greiner, M., Enßlin, T., Schnitzeler, D. H. F. M., T. A. Enßlin, A. Goobar, L. Pratley, Enßlin, T. A., Junklewitz, H., B. M. Gaensler, J. M. Stil, Gaensler, B. M., Stil, J. M., Oppermann, N., Stil, J., D. H. F. M. Schnitzeler, CARRETTI, ETTORE, Goobar, Ariel,, Goobar, A., Schnitzeler, D.   +34 more
core   +1 more source

How Tycho Brahe’s recordings in 1572 support SN 1572 as a type I(a) supernova

Frontiers in Astronomy and Space Sciences, 2023
The 450th anniversary of the discovery of the SN 1572 supernova event was celebrated in 2022. A closer look at the historical development of the field of supernova astronomy reveals the scientific importance of Tycho Brahe’s 1572 observations of this ...
Tobias C. Hinse, Tobias C. Hinse, Bertil F. Dorch, Bertil F. Dorch, Lars V. T. Occhionero, Jakob P. Holck   +5 more
doaj   +1 more source

The Anatomy of a Turbulent Radiative Mixing Layer: Insights from an Analytic Model with Turbulent Conduction and Viscosity

The Astrophysical Journal, 2023
Turbulent radiative mixing layers (TRMLs) form at the interface of cold, dense gas and hot, diffuse gas in motion with each other. TRMLs are ubiquitous in and around galaxies on a variety of scales, including galactic winds and the circumgalactic medium.
Zirui Chen, Drummond B. Fielding, Greg L. Bryan   +2 more
doaj   +1 more source

Evolution of Low Surface Brightness Ultrathin Galaxies: The Role of Dark Matter Halo and Bar Formation on Disk Thickness

The Astrophysical Journal
We investigate how stellar disks sustain their ultrathin structure throughout their evolution. We follow the evolution of ultrathin stellar disks with varying dark matter (DM) halo concentration ( c ) using collisionless N -body simulations with AREPO ...
K. Aditya, Arunima Banerjee
doaj   +1 more source

Regulation of Star Formation by a Hot Circumgalactic Medium

The Astrophysical Journal, 2023
Galactic outflows driven by supernovae (SNe) are thought to be a powerful regulator of a galaxy’s star-forming efficiency. Mass, energy, and metal outflows ( η _M , η _E , and η _Z , here normalized by the star formation rate, the SNe energy, and metal ...
Christopher Carr, Greg L. Bryan, Drummond B. Fielding, Viraj Pandya, Rachel S. Somerville   +4 more
doaj   +1 more source

On the Detection of Low‐Frequency Planetary Radio Emission With an Orbiting Interferometer

Radio Science, Volume 61, Issue 6, June 2026.
Abstract The magnetized planets of the outer Solar System produce kilometric radio emissions at very low frequencies (<1 ${< } 1\,$MHz). They reveal the planetary magnetic dynamics and their interaction with the solar wind. Those radio emissions can also serve as a proxy for interplanetary space weather monitoring.
E. Rouillé, B. Cecconi, B. Segret, J. N. Girard, A. Loh   +4 more
wiley   +1 more source

Radial Profiles of Σ*, ΣSFR, Gas Metallicity, and Their Correlations across the Galactic Mass–Size Plane

The Astrophysical Journal
We analyzed the global and resolved properties of approximately 1240 nearby star-forming galaxies from the MaNGA survey, comparing compact and extended galaxies—those with smaller and larger radii ( R _e ), respectively—at a fixed stellar mass ( M _ ...
Lin Lin, Shiyin Shen, Hassen M. Yesuf, Ye-Wei Mao, Lei Hao   +4 more
doaj   +1 more source

Discovery and Initial Investigation of a New Low Surface Brightness Planetary Nebula Candidate at High Galactic Latitude

Astronomische Nachrichten, Volume 347, Issue 3, March 2026.
ABSTRACT Planetary nebulae represent a late evolutionary phase of low‐ to intermediate‐mass stars. In this article, we present the serendipitous discovery of a previously unknown, faint potential Galactic planetary nebula (PN) in the constellation Camelopardalis, identified during a survey‐inspection, aiming at the detection of dwarf companions of the ...
W. E. Celnik, P. Köchling, S. Kotov, J. Kozok, Y. Galata, L. Magrini, A. Moiseev, M. Nischang, C. Reese, P. Remmel, P. Riepe, T. Zilch, K. Werner   +12 more
wiley   +1 more source

New Synoptic Observations of the Cosmic Optical Background with New Horizons

The Astrophysical Journal
We obtained New Horizons LORRI images to measure the cosmic optical background (COB) intensity integrated over 0.4 μ m ≲ λ ≲ 0.9 μ m. The survey comprises 16 high-Galactic-latitude fields selected to minimize scattered diffuse Galactic light (DGL) from ...
Marc Postman, Tod R. Lauer, Joel W. Parker, John R. Spencer, Harold A. Weaver, J. Michael Shull, S. Alan Stern, Pontus Brandt, Steven J. Conard, G. Randall Gladstone, Carey M. Lisse, Simon B. Porter, Kelsi N. Singer, Anne. J. Verbiscer   +13 more
doaj   +1 more source

Open Questions in Cosmic-Ray Research at Ultrahigh Energies

Frontiers in Astronomy and Space Sciences, 2019
We review open questions and prospects for progress in ultrahigh-energy cosmic ray (UHECR) research, based on a series of discussions that took place during the “The High-Energy Universe: Gamma-Ray, Neutrino, and Cosmic-ray Astronomy” MIAPP workshop in ...
Rafael Alves Batista, Jonathan Biteau, Mauricio Bustamante, Klaus Dolag, Klaus Dolag, Ralph Engel, Ke Fang, Karl-Heinz Kampert, Dmitriy Kostunin, Miguel Mostafa, Kohta Murase, Kohta Murase, Foteini Oikonomou, Angela V. Olinto, Mikhail I. Panasyuk, Guenter Sigl, Andrew M. Taylor, Michael Unger   +17 more
doaj   +1 more source