Analytical halo model of galactic conformity
نویسندگان
چکیده
منابع مشابه
Formation of the Galactic Halo
Recent observational and theoretical work suggests that the formation of the Galactic stellar halo involved both dissipative processes and the accretion of subfragments. With present data, the fraction of the halo for which an accretion origin can be substantiated is small, of order 10 percent. The kinematics of the best halo field star samples show evidence for both dissipative and dissipation...
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Weanalyzed the intensity distribution of the 3/4 keV and 1/4 keV diffuse soft X-ray background by correlating the ROSAT all-sky survey with the Leiden/Dwingeloo H i survey. We found that the 3/4 keV and 1/4 keV intensity distributions can be modelled by a contribution from an isothermal (kT = 0.135 keV) flattened X-ray halo superposed on the radiation from an extragalactic X-ray background. The...
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We find solid evidence for diffuse Hi gas at substantial z heights in our Galaxy, with a velocity dispersion of σ = 60 km s −1 and a vertical projected column density of N Hi = 1.4 · 10 19 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 observations for reflections fro...
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Recent observations of microlensing events in the Large Magel-lanic Cloud suggest that a sizeable fraction of the galactic halo is in the form of Massive Astrophysical Compact Halo Objects (MACHOs) with mass less than about 0.1M ⊙. Here we argue that molecular clouds (mainly of H 2) located in the galactic halo can contribute substantially to its total mass. We outline a scenario in which dark ...
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The status of the microlensing search for galactic dark matter in the form of massive astronomical compact halo objects (machos) is reviewed. Unresolved issues are discussed, as well as possible ways to solve these.
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2017
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/stx1325