Consequences of Starbursts for the Interstellar and Intergalactic Medium

2013 ◽  
pp. 91-114
Author(s):  
Dieter Breitschwerdt ◽  
Miguel de Avillez ◽  
Ernst Dorfi
Keyword(s):  
Intergalactic Medium

scholarly journals Tidal Dwarf Galaxies

1998 ◽  
Vol 11 (1) ◽  
pp. 141-144
Author(s):  
P.-A. Duc ◽  
I.F. Mirabel ◽  
E. Brinks
Keyword(s):  
Environmental Effects ◽  
Intergalactic Medium ◽  
Dwarf Galaxies ◽  
Star Forming ◽  
Evolution Of Galaxies ◽  
New Generation

The life and evolution of galaxies are dramatically affected by environmental effects. Interactions with the intergalactic medium and collisions with companions cause major perturbations in the morphology and contents of galaxies: in particular stars and gas clouds may be gravitationally pulled out from their parent galaxies during tidal encounters, forming rings, tails and bridges. This debris of collisions lies at the origin of a new generation of small galaxies, the so-called “tidal dwarf galaxies” (hereafter TDGs). Such an exotic way of forming galaxies was put forward by Schweizer (1978) and by Mirabel et al. (1992), who clearly observed the genesis of a star-forming object, out of material tidally expelled from the interacting system NGC 4038/39 (“The Antennae”). Recent studies, based on optical and HI observations, have shown that TDGs actually form a class of “recycled” objects with some properties similar to the more classical dwarf irregulars (dIrr) and blue compact dwarf galaxies (BCDs).

Propagation of cosmic rays and their secondaries in the intracluster medium

2020 ◽  
Vol 15 (S359) ◽  
pp. 178-179
Author(s):  
Saqib Hussain ◽  
Rafael Alves Batista ◽  
Elisabete Maria de Gouveia Dal Pino ◽  
Klaus Dolag
Keyword(s):  
Cosmic Rays ◽  
Gamma Rays ◽  
Intergalactic Medium ◽  
Three Dimensional ◽  
High Energy ◽  
Intracluster Medium ◽  
High Energy Cosmic Rays ◽  
Test Particles

AbstractWe present results of the propagation of high-energy cosmic rays (CRs) and their secondaries in the intracluster medium (ICM). To this end, we employ three-dimensional cosmological magnetohydrodynamical simulations of the turbulent intergalactic medium to explore the propagation of CRs with energies between 1014 and 1019 eV. We study the interaction of test particles with this environment considering all relevant electromagnetic, photohadronic, photonuclear, and hadronuclear processes. Finally, we discuss the consequences of the confinement of high-energy CRs in clusters for the production of gamma rays and neutrinos.

scholarly journals The Low-redshift Intergalactic Medium

1999 ◽  
Vol 16 (1) ◽  
pp. 95-99 ◽  
Author(s):  
J. Michael Shull ◽  
Steven V. Penton ◽  
John T. Stocke
Keyword(s):  
Galaxy Formation ◽  
Large Scale ◽  
Intergalactic Medium ◽  
Hubble Space Telescope ◽  
Characteristic Size ◽  
Baryon Density ◽  
Frequency Space ◽  
Physical Conditions ◽  
Low Metallicity ◽  
Set Up

AbstractThe low-redshift Lyα forest of absorption lines provides a probe of large-scale baryonic structures in the intergalactic medium, some of which may be remnants of physical conditions set up during the epoch of galaxy formation. We discuss our recent Hubble Space Telescope (HST) observations and interpretation of low-z Lyα clouds toward nearby Seyferts and QSOs, including their frequency, space density, estimated mass, association with galaxies, and contribution to Ωb. Our HST/GHRS detections of ∼ 70 Lyα absorbers with Nhi ≥ 1012·6 cm−2 along 11 sightlines covering pathlength Δ(cz) = 114,000 km s−1 show f (>Nhi) α Nhi−0·63±0·04 and a line frequency dN/dz = 200 ± 40 for Nhi > 1012·6 cm−2 (one every 1500 km s−1 of redshift). A group of strong absorbers toward PKS 2155–304 may be associated with gas (400–800) kpc from four large galaxies, with low metallicity (≤0·003 solar) and D/H ≤ 2 × 10−4. At low-z, we derive a metagalactic ionising radiation field from AGN of J0 = × 10−23 erg cm−2 s−1 Hz−1 sr−1 and a Lyα-forest baryon density Ωb =(0·008 ± 0·004)[J−23N14b100]½ for clouds of characteristic size b = (100 kpc)b100.

scholarly journals Probing the Dependence of the Intergalactic Medium on Large-scale Environment Using the Low-redshift LyαForest

2017 ◽  
Vol 845 (1) ◽  
pp. 47 ◽  
Author(s):  
Stephanie Tonnesen ◽  
Britton D. Smith ◽  
Juna A. Kollmeier ◽  
Renyue Cen
Keyword(s):  
Large Scale ◽  
Intergalactic Medium

The Spin Temperature and 21 cm Brightness of the Intergalactic Medium in the Pre-Reionization era

2006 ◽  
Vol 637 (1) ◽  
pp. L1-L4 ◽  
Author(s):  
Michael Kuhlen ◽  
Piero Madau ◽  
Ryan Montgomery
Keyword(s):  
Intergalactic Medium ◽  
Spin Temperature

scholarly journals Constraining quasar and intergalactic medium properties through bubble detection in redshifted 21-cm maps

2012 ◽  
Vol 426 (4) ◽  
pp. 3178-3194 ◽  
Author(s):  
Suman Majumdar ◽  
Somnath Bharadwaj ◽  
T. Roy Choudhury
Keyword(s):  
Intergalactic Medium ◽  
Bubble Detection

scholarly journals Heating of the intergalactic medium by FR II radio sources

1999 ◽  
Vol 305 (3) ◽  
pp. 707-723 ◽  
Author(s):  
C. R. Kaiser ◽  
P. Alexander
Keyword(s):  
Intergalactic Medium ◽  
Radio Sources

scholarly journals Physical state of the intergalactic medium at redshiftsz= 2-4

2004 ◽  
Vol 354 (1) ◽  
pp. 183-192 ◽  
Author(s):  
M. Demiański ◽  
A. G. Doroshkevich
Keyword(s):  
Physical State ◽  
Intergalactic Medium

scholarly journals STUDYING THE WARM HOT INTERGALACTIC MEDIUM WITH GAMMA-RAY BURSTS

2009 ◽  
Vol 697 (1) ◽  
pp. 328-344 ◽  
Author(s):  
E. Branchini ◽  
E. Ursino ◽  
A. Corsi ◽  
D. Martizzi ◽  
L. Amati ◽  
...  
Keyword(s):  
Intergalactic Medium ◽  
Gamma Ray ◽  
Gamma Ray Bursts
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