linkedin post 2021-07-20 05:06:58

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QUASARS. “Given the compact sizes of these inner regions (sub-parsec for a 108 M⊙ BH), variability induced by instabilities in the accretion flow, reprocessing of light, and dynamical evolution of the inner regions can be observed over a broad range of timescales from intra-hours to decades, providing observational constraints on these regions that are too small to be spatially resolved directly.” (M⊙ = unit of sun’s mass). https://lnkd.in/dEvc7DF View in LinkedIn
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linkedin post 2021-07-18 04:57:49

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SO ENDS this article on the genetics of an extraordinary and hugely successful evolutionary strategy that hijacks the host reproductive system. Parasites are known to manipulate host behavior in equally extraordinary ways, causing them to suicide in order to perpetuate the parasite; there seem few limits to how deeply life forms can be hacked, a sobering thought. https://lnkd.in/dXjWp9f View in LinkedIn
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linkedin post 2021-07-20 05:03:48

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“THE INNER STRUCTURES of quasars (the accretion disk, the BLR, and the dust torus) are all within the sphere of influence of the SMBH, where the most important processes associated with accretion are occurring (e.g., winds and outflows, photoionization, chemical enrichment, dynamical evolution, etc.).” ( SMBH = supermassive black hole; BLR = broad emission line region). https://lnkd.in/dEvc7DF View in LinkedIn
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linkedin post 2021-07-20 05:00:46

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GALACTIC REACH OF SIGNATURES. “The inner regions of quasars emit most of the luminosity of these accreting BHs, and produce copious diagnostic features in the observed rest-frame UV-infrared spectrum. The basic structure of quasars consists of an accretion disk surrounding the BH that produces the intense ionizing radiation needed to power the broad emission line region (BLR), the dust torus, and the narrow emission line region (NLR), which extends to galactic scales.” ( BH = black hole). https://lnkd.in/dEvc7DF View in LinkedIn
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linkedin post 2021-07-20 04:57:38

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“QUASARS (luminous Active Galactic Nuclei, or AGN) are among the most luminous extragalactic objects in the Universe. Powered by rapid mass accretion onto the supermassive black holes (SMBHs) at the center of distant galaxies, quasars are beacons marking growing massive black holes (BH) and their host galaxies to the farthest reach of modern telescopes (e.g., a recently discovered quasar at z ∼ 7.5.” https://lnkd.in/dEvc7DF View in LinkedIn
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linkedin post 2021-07-19 04:45:39

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JUPITER’S EXTREME H2O. “Rearrangements of those hydrogen bonds, which take place as temperature and pressure are varied, give rise to a large family of complex network structures beyond the “ordinary” hexagonal form of ice. Water molecules can form cages around hydrophobic species such as methane to form clathrate hydrates.” https://lnkd.in/dKBrrak View in LinkedIn
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linkedin post 2021-07-19 04:42:01

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NEW PAPER ON LUMINOUS QUAZARS. “As the most luminous non-transient objects that can be observed in the early universe, high-redshift quasars are indispensable tracers of early black hole growth, the formation of the first massive galaxies in the universe, and the history of cosmic reionization.” https://lnkd.in/devi4ZN View in LinkedIn
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