Results 1 to 10 of about 73,052 (295)
Dynamical Galactic Halos [PDF]
Symposium - International Astronomical Union, 1993 It is argued that the description of the magnetic field in halos of galaxies should take into account its dynamical coupling to the other major components of the interstellar medium, namely thermal plasma and cosmic rays (CR's). It is then inevitable to have some loss of gas and CR's (galactic wind) provided that there exist some “open” magnetic field ...
D. Breitschwerdt +3 more
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The Astrophysical Journal, 2023 The CHIME/FRB project has detected hundreds of fast radio bursts (FRBs), providing an unparalleled population to statistically probe the foreground media that they illuminate. One such foreground medium is the ionized halo of the Milky Way (MW).
Amanda M. Cook +27 more
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Galactic Wormhole under Lovelock Gravity
Universe, 2022 We explore wormhole geometry in spiral galaxies under the third order Lovelock gravity. Using the cubic spline interpolation technique, we find the rotational velocity of test particles in the halo region of our spiral galaxy from observed values of ...
Koushik Chakraborty +4 more
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Pressure at the ISM-halo interface: A reheating frequency dependence [PDF]
Serbian Astronomical Journal, 1998 The dependence of the thermal pressure of hot galactic halos on a model parameter describing the frequency of major reheating episodes during galactic history is investigated.
Ćirković M.M.
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International Astronomical Union Colloquium, 1997 AbstractWe find indications for diffuse HI gas at substantial z heights in our Galaxy, with a velocity dispersion of 60 km s−1 and a vertical projected column density of 1.41019 cm−2. This pervasive component of the emission spectrum could be identified in the Leiden/Dwingeloo 21 cm Survey (LDS) after increasing the accuracy further by correcting the ...
P. M. W. Kalberla +4 more
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International Astronomical Union Colloquium, 1997 AbstractWe analyzed the soft X-ray background (SXRB) source intensity distribution of the ¾ keV and ¼ keV photons by correlating the public ROSAT PSPC All-Sky Survey data with the new Leiden/Dwingeloo HI Survey. We found that the ¾ keV and ¼ keV distant background source intensity distribution can be modelled by an isothermal (T = 1.5.106 K) disk-like (
Pietz, J. +5 more
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Galactic halos as boson stars [PDF]
Physical Review D, 1996 We investigate the boson star with the self-interacting scalar field as a model of galactic halos. The model has slightly increasing rotation curves and allows wider ranges of the mass($m$) and coupling($ $) of the halo dark matter particle than the non-interacting model previously suggested(ref.\cite{sin1}). Two quantities are related by $ ^{\frac{1}
Lee, Jae-weon, Koh, In-guy
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Gravitational Stability of Vortices in Bose-Einstein Condensate Dark Matter
The Open Journal of Astrophysics, 2022 We investigate a simple model for a galactic halo under the assumption that it is dominated by a dark matter component in the form of a Bose-Einstein condensate involving an ultra-light scalar particle.
Mark N Brook, Peter Coles
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The Galactic Halo Ionising Field [PDF]
Publications of the Astronomical Society of Australia, 1997 AbstractThere has been much debate in recent decades as to what fraction of ionising photons from star-forming regions in the Galactic disk escape into the halo. The recent detection of the Magellanic Stream in optical line emission at the CTIO 4 m and the AAT 3·9 m telescopes may now provide the strongest evidence that at least some of the radiation ...
Bland-Hawthorn, J., Maloney, P. R.
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The Astrophysical Journal, 2023 We studied the spectral signature of different components of the diffuse X-ray background (DXB), including Local Hot Bubble, solar wind charge exchange, galactic halo, and typically unresolved point sources (galaxies and active galactic nuclei), in the ...
Sicong Huang +6 more
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