Results 41 to 50 of about 405 (141)

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

Dark Energy From the Gravitational Wave Background With Scalar Field Dark Matter

Astronomische Nachrichten, Volume 346, Issue 3-4, March-May 2025.
ABSTRACT Recent observational results, such as those from pulsar timing arrays (PTA), suggest a low‐frequency Gravitational Wave Background (GWB) permeates our universe. This opens the possibility that gravitational waves could span a broader spectrum, potentially impacting cosmological scales.
Edwin L. Pérez‐Ochoa, Tonatiuh Matos
wiley   +1 more source

Discovery of ~2200 new supernova remnants in 19 nearby star-forming galaxies with MUSE spectroscopy [PDF]

Supernova feedback injects energy and turbulence into the interstellar medium (ISM) in galaxies, influences the process of star formation, and is essential to understanding the formation and evolution of galaxies.
Kathryn Grasha, K. S. Long, Ralf S. Klessen, J. Eduardo Méndez-Delgado, Adam Leroy, Enrico Congiu, Oleg V. Egorov, Ashley T. Barnes, Eva Schinnerer, B. Groves, Laura A. Lopez, Guillermo A. Blanc, S. Sarbadhicary, Thomas G. Williams, Simon C. O. Glover, Frank Bigiel, K. Kreckel, Francesco Belfiore, Justus Neumann   +18 more
core   +1 more source

Probing extreme black‐hole outflows on short timescales via high spectral‐resolution x‐ray imagers

Astronomische Nachrichten, Volume 345, Issue 6-7, July-August 2024.
Abstract We investigate outflows and the physics of super‐Eddington versus sub‐Eddington regimes in black hole systems. Our focus is on prospective science using next‐generation high‐resolution soft x‐ray instruments. We highlight the properties of black hole ultraluminous x‐ray source (ULX) systems in particular. Owing to scale invariance in accreting
C. Pinto, J. F. Steiner, A. Bodaghee, P. Chakraborty, M. Sobolewska, D. R. Pasham, A. Ogorzalek, J. Zuhone, A. Bogdan, M. Vogelsberger   +9 more
wiley   +1 more source

Evolution of multiple supernova remnants [PDF]

, 2015
Open AccessHeating of the interstellar medium (ISM) by multiple supernova (SN) explosions is at the heart of producing galaxy-scale outflows in starburst galaxies.
Vasiliev, Evgenii O., Shchekinov, Yuri, Nath, Biman B.   +2 more
core   +1 more source

MHD lensing in inhomogeneous ISM for qualitative understanding of  the morphology of supernova remnants

Astrophysics and Space Science
Abstract Morphological evolution of expanding shells of fast-mode magnetohydrodynamic (MHD) waves through an inhomogeneous ISM is investigated in order to qualitatively understand the complicated morphology of shell-type supernova remnants (SNR).
openaire   +2 more sources

Characterizing the dynamical magnetosphere of the extremely slowly rotating magnetic O9.7 V star HD 54879 using rotational modulation of the Hα profile

Astronomische Nachrichten, Volume 345, Issue 4, May 2024.
Abstract The magnetic field in the O9.7 V star HD 54879 has been monitored for almost a decade. Spectropolarimetric observations reveal a rather strong mean longitudinal magnetic field that varies with a period of about 7.41 years. Observations in the Hα$$ \alpha $$ line show a variation with the same period, while the Hβ$$ \beta $$ line shows only ...
Manfred Küker, S. P. Järvinen, S. Hubrig, Ilya Ilyin, M. Schöller   +4 more
wiley   +1 more source

Where do stars explode in the ISM? -- The distribution of dense gas around massive stars and supernova remnants in M33 [PDF]

, 2023
Star formation in galaxies is regulated by turbulence, outflows, gas heating and cloud dispersal -- processes which depend sensitively on the properties of the interstellar medium (ISM) into which supernovae (SNe) explode.
Chomiuk, Laura, Williams, Thomas G., Villanueva, Vicente, Indebetouw, Remy, Murray, Claire E., Chen, Ness Mayker, Leroy, Adam K., Roman-Duval, Julia, Ott, Juergen, Wong, Tony, Murphy, Eric J., Rosolowsky, Erik, Walter, Fabian, Darling, Jeremy, Meyer, Jennifer Donovan, Kim, Chang-Goo, Stanimirović, Snežana, Lopez, Laura A., Strader, Jay, Sarbadhicary, Sumit K., Pingel, Nickolas M., Neugent, Kathryn F., Dalcanton, Julianne J., Smercina, Adam, Tarantino, Elizabeth, Koch, Eric W., Skillman, Evan D., Lahén, Natalia, Kepley, Amanda A., Wagner, Jordan   +29 more
core   +1 more source

Causal theories of spacetime

Noûs, Volume 58, Issue 1, Page 202-224, March 2024.
Abstract We develop a new version of the causal theory of spacetime. Whereas traditional versions of the theory seek to identify spatiotemporal relations with causal relations, the version we develop takes causal relations to be the grounds for spatiotemporal relations. Causation is thus distinct from, and more basic than, spacetime. We argue that this
Sam Baron, Baptiste Le Bihan
wiley   +1 more source

Barrels, jets and smoke-rings: Understanding the bizarre shapes of radio supernova remnants [PDF]

, 1999
This thesis considers the various morphologies of radio supernova remnants (SNRs), and attempts to determine whether their appearance results from the properties of the progenitor star and its supernova explosion, or from the structure of the ...
Gaensler, Bryan Malcolm
core