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Gamma-ray bursts are the most luminous explosions in the Universe. They appear connected to supernova remnants from massive stars or the merger of their remnants, and their brightness makes them temporarily detectable out to the larges…

High Energy Astrophysical Phenomena · Physics 2014-01-22 P. Meszaros , M. J. Rees

In the coming LSST era, we will observe $\mathcal{O}(100)$ of lensed supernovae (SNe). In this paper, we investigate possibility for predicting time and sky position of a supernova using strong lensing. We find that it will be possible to…

High Energy Astrophysical Phenomena · Physics 2017-12-27 Yudai Suwa

The first stars ended the cosmic Dark Ages and created the first heavy elements necessary for the formation of planets and life. The properties of these stars remain uncertain, and it may be decades before individual Pop III stars are…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-11 Daniel J. Whalen , Chris L. Fryer , Daniel E. Holz , Alexander Heger , S. E. Woosley , Massimo Stiavelli , Wesley Even , Lucille L. Frey

When the shock wave generated in a supernova explosion breaks out of the stellar envelope, the first photons, typically in the X-ray to UV range, escape to the observer. Following this breakout emission, radiation from deeper shells…

High Energy Astrophysical Phenomena · Physics 2019-10-16 Tamar Faran , Re'em Sari

Although the photon structure is most efficiently studied with the accelerator instruments, there is also a scientifically complementary potential in investigations on photons produced in the outer space. This potential is already being…

Stellar halos around galaxies retain fundamental evidence of the processes which lead to their build up. Sophisticated models of galaxy formation in a cosmological context yield quantitative predictions about various observable…

Astrophysics of Galaxies · Physics 2016-09-07 Laura Greggio , Renato Falomo , Michela Uslenghi

We consider possible observable signals from explosive events in the very early universe, ``bursts". These could be expected in connection with massive black hole or ``baby universe'' formation. We anticipate that such major disruptions of…

Cosmology and Nongalactic Astrophysics · Physics 2025-10-20 Leo Stodolsky , J. Silk

Recent rapid progress in time domain surveys makes it possible to detect various types of explosive transients in the Universe in large numbers, some of which will be gravitationally lensed into multiple images. Although a large number of…

Cosmology and Nongalactic Astrophysics · Physics 2020-01-08 Masamune Oguri

MICADO, the European Extremely Large Telescope first light imager will feature a dedicated high contrast imaging mode specifically designed for observing and characterizing exoplanets and circumstellar disks. Its improved sensitivity and…

Instrumentation and Methods for Astrophysics · Physics 2024-11-22 Pierre Baudoz , Elsa Huby , Olivier Dupuis , Faouzi Boussaha , Yann Clénet , Ric Davies

Despite their paucity, massive hot stars are real cosmic engines of fundamental importance in shaping our Universe, from its very early stages up to its current appearance. Understanding the physics of massive stars is then a key issue for…

Astrophysics · Physics 2007-08-22 Miguel A. Urbaneja , Rolf Peter Kudritzki , Fabio Bresolin

The Interferometric studies of novae in the optical and near-infrared is a nascent but fast emerging field which has begun to provide new and invaluable insights into the nova phenomenon. This is particularly so in the early stages of the…

Solar and Stellar Astrophysics · Physics 2012-10-10 Olivier Chesneau , D. P. K. Banerjee

Transmission and eclipse spectroscopy have been invaluable tools for the characterisation of extrasolar planet atmospheres. While they will continue to provide many new insights and discoveries in the decade(s) to come, these methods are…

Instrumentation and Methods for Astrophysics · Physics 2025-12-17 Ignas Snellen , Sebastiaan Haffert , Matthew Kenworthy , Tomas Stolker

The emergence of the first black holes during the first billion years of cosmic history marks a key event in cosmology. Their formation is part of the overall process of ending the cosmic dark ages, when the first stars appeared in low-mass…

Astrophysics of Galaxies · Physics 2019-07-26 Aaron Smith , Volker Bromm

The explosion of a supernovae (SN) represents the sudden injection of about 10^51 ergs of thermal and mechanical energy in a small region of space, causing the formation of powerful shock waves that propagate through the interstellar medium…

Solar and Stellar Astrophysics · Physics 2015-03-04 Gloria Dubner

Transmission spectroscopy has proven to be an effective technique for characterizing exoplanet atmospheres. However, transmission spectroscopy requires planetary transits, which occur for only a small fraction of planetary systems due to…

Earth and Planetary Astrophysics · Physics 2025-10-24 Parvathy Menon , Sivarani T , Sriram S , Manjunath Bestha , Devika K Divakar , Rajaguru S P , Arun Surya

A brief summary of some highlights in the study of high energy astrophysical sources over the past decade is presented. It is argued that the great progress that has been made derives largely from the application of new technology to…

Astrophysics · Physics 2007-05-23 R. D. Blandford

The primary instrument of the proposed EXIST mission is a coded mask high energy telescope (the HET), that must have a wide field of view and extremely good sensitivity. It will be crucial to minimize systematic errors so that even for very…

Instrumentation and Methods for Astrophysics · Physics 2010-02-23 G. K. Skinner , S. D. Barthelmy , M. H. Finger , J. Hong , G. G. Jernigan , S. J. Sturner , B. T. Allen , J. E. Grindlay

The first star clusters and quasars resulted directly from the growth of linear density fluctuations in the early Universe. Since they emerged from a well-defined set of initial conditions, the interplay between observational data from the…

Astrophysics · Physics 2007-05-23 Abraham Loeb

One of the main objectives of cosmic-ray studies are precise measurements of energy and chemical composition of particles with extreme energies. Large and sophisticated detectors are used to find events seen as showers starting in the…

We introduce neutrino astronomy starting from the observational fact that Nature accelerates protons and photons to energies in excess of 10^{20} and 10^{13} eV, respectively. Although the discovery of cosmic rays dates back a century, we…

Astrophysics · Physics 2007-05-23 F. Halzen