Hydrogen-like nitrogen radio line from hot interstellar and warm-hot intergalactic gas
نویسندگان
چکیده
منابع مشابه
Warm - hot intergalactic baryons revealed
Several popular cosmological models predict that most of the baryonic mass in the local universe is located in filamentary and sheet-like structures associated with galaxy overdensities. This gas is expected to be gravitationally heated to ∼ 10 K and therefore emitting in the soft X-rays. We have detected diffuse soft X-ray structures in a high Galactic latitude ROSAT field after point source s...
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Approximately 30− 40% of all baryons in the present day universe reside in a warm-hot intergalactic medium (WHIM), with temperatures between 10 < T < 10 K. This is a generic prediction from six hydrodynamic simulations of currently favored structure formation models having a wide variety of numerical methods, input physics, volumes, and spatial resolutions. Most of these warm-hot baryons reside...
متن کاملMissing baryons and the warm-hot intergalactic medium.
Stars and gas in galaxies, hot intracluster medium, and intergalactic photo-ionized gas make up at most half of the baryons that are expected to be present in the universe. The majority of baryons are still missing and are expected to be hidden in a web of warm-hot intergalactic medium. This matter was shock-heated during the collapse of density perturbations that led to the formation of the re...
متن کاملObservations of the Warm - Hot Intergalactic Medium towards PG
We use Far Ultraviolet Spectroscopic Explorer (FUSE) and Space Telescope Imaging Spectrograph (STIS) spectra to study intergalactic absorption towards the quasar PG1259+593 (zem = 0.478), with a particular emphasis on the warm-hot intergalactic medium (WHIM). The combined FUSE and STIS spectrum of PG1259+593 covers the full wavelength range between 905 and 1730 Å at a spectral resolution of∼ 25...
متن کاملA Warm Hot Intergalactic Medium towards 3c 120?
We observed the Seyfert I active galaxy/broad line radio galaxy 3C 120 with the Chandra high energy transmission gratings and present an analysis of the soft X-ray spectrum. We identify the strongest absorption feature (detected at > 99.9% confidence) with O VIII Lyα (FWHM = 1010+295 −265 km s −1), blueshifted by −5500± 140 km s−1 from systemic velocity. The absorption may be due to missing bar...
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ژورنال
عنوان ژورنال: Astronomy Letters
سال: 2007
ISSN: 1063-7737,1562-6873
DOI: 10.1134/s1063773707020016