Results 21 to 30 of about 1,962,001 (214)

The Metallicity of Intergalactic Gas in Cosmic Voids [PDF]

The Astrophysical Journal, 2007
We have used the Hubble/STIS and FUSE archives of ultraviolet spectra of bright AGN to identify intergalactic Lya absorbers in nearby (z < 0.1) voids. From a parent sample of 651 Lya absorbers, we identified 61 void absorbers located more than 1.4/h_70 Mpc from the nearest L* or brighter galaxy.
Stocke, John T., Danforth, Charles W., Shull, J. Michael, Penton, Steven V., Giroux, Mark L.   +4 more
openaire   +3 more sources

How do atomic code uncertainties affect abundance measurements in the intracluster medium?

Astronomische Nachrichten, Volume 341, Issue 2, Page 203-209, February 2020., 2020
Abstract Accurate chemical abundance measurements of X‐ray‐emitting atmospheres pervading massive galaxies, galaxy groups, and clusters provide essential information on the star formation and chemical enrichment histories of these large‐scale structures.
François Mernier, Norbert Werner, Kiran Lakhchaura, Jelle de Plaa, Liyi Gu, Jelle S. Kaastra, Junjie Mao, Aurora Simionescu, Igone Urdampilleta   +8 more
wiley   +1 more source

The ultraviolet background (intergalactic gas, the Galaxy, and subcosmic rays) [PDF]

Symposium - International Astronomical Union, 1970
(1)Observations. – A survey is made of observations of the background radiation at UV wavelengths from above the atmosphere. Sources of the background radiation and ways of determining the extragalactic component of the background are discussed. Future observations are also discussed.(2)Cosmology.
V. G. Kurt, R. A. Sunyaev
openaire   +1 more source

Bounds on sterile neutrino lifetime and mixing angle with active neutrinos by global 21 cm signal

Physics Letters B, 2022
Sterile neutrinos can be a possible candidate for dark matter. Sterile neutrinos are radiatively unstable and can inject photon energy into the intergalactic medium (IGM).
Pravin Kumar Natwariya, Alekha C. Nayak
doaj   +1 more source

Direct Images of the Cosmic Web of Intergalactic and Circumgalactic Gas in the Distant Universe

International audienceMost of the baryonic matter of the Universe resides in a highly-ionized gaseous intergalactic medium. This gas flows along dark-matter filaments toward galaxy superclusters, clusters, and groups until it pools around the galaxies ...
Shara, Michael M, Sololiuk, Oleksii, Webb, John K, Valls-Gabaud, David, Walter, Frederick M, Lanzetta, Kenneth M, von der Linden, Anja, Gromoll, Stefan   +7 more
core   +7 more sources

EIGER. I. A Large Sample of [O iii]-emitting Galaxies at 5.3 < z < 6.9 and Direct Evidence for Local Reionization by Galaxies

The Astrophysical Journal, 2023
We present a first sample of 117 [O iii ] λλ 4960, 5008–selected star-forming galaxies at 5.33 < z < 6.93 detected in JWST/NIRCam 3.5 μ m slitless spectroscopy of a $6\buildrel{\,\prime}\over{.} 5\,\times \,3\buildrel{\,\prime}\over{.} 4$ field centered ...
Daichi Kashino, Simon J. Lilly, Jorryt Matthee, Anna-Christina Eilers, Ruari Mackenzie, Rongmon Bordoloi, Robert A. Simcoe   +6 more
doaj   +1 more source

Detection of intergalactic gas in distant, rich clusters [PDF]

Nature, 1977
WE have detected a reduction in intensity or ‘cooling’ of the cosmic microwave background as this radiation passes through several rich clusters of galaxies. These observations imply the presence of substantial quantities of hot intergalactic gas in the clusters observed.
Partridge, Bruce, Lake, G.
openaire   +1 more source

HIPASS Detection of an Intergalactic Gas Cloud in the NGC 2442 Group [PDF]

The Astrophysical Journal, 2001
We report the discovery from the H I Parkes All-Sky Survey (HIPASS) of a gas cloud associated with the asymmetric spiral galaxy NGC 2442. This object, designated HIPASS J0731-69, contains ~109 Msolar of H I, or nearly one-third as much atomic gas as NGC 2442 itself.
Ryder, S. D., Koribalski, B., Staveley-Smith, L., Kilborn, Virginia, Malin, D. F., Banks, G. D., Barnes, D. G., Bhatal, R., De Blok, W. J.G., Boyce, P. J., Disney, M. J., Drinkwater, M. J., Ekers, R. D., Freeman, K. C., Gibson, B. K., Henning, P. A., Jerjen, H., Knezek, P. M., Marquarding, M., Minchin, R. F., Mould, Jeremy, Oosterloo, T., Price, R. M., Putman, M. E., Sadler, E. M., Stewart, I., Stootman, F., Webster, R. L., Wright, A. E.   +28 more
openaire   +4 more sources

The entropy and energy of intergalactic gas in galaxy clusters [PDF]

Monthly Notices of the Royal Astronomical Society, 2000
Studies of the X-ray surface brightness profiles of clusters, coupled with theoretical considerations, suggest that the breaking of self-similarity in the hot gas results from an `entropy floor', established by some heating process, which affects the structure of the intracluster gas strongly in lower mass systems.
Lloyd-Davies, E. J., Ponman, T. J., Cannon, D. B.   +2 more
openaire   +2 more sources

Limits on Intergalactic Dust During Reionization [PDF]

, 2017
In this Letter, we constrain the dust-to-gas ratio in the intergalactic medium (IGM) at high redshifts. We employ models for dust in the local Universe to contrain the dust-to-gas ratio during the epoch of reionization at redshifts z ~ 6-10. The observed
Loeb, Abraham, Imara, Nia
core   +1 more source