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Dark Matter Burners
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Book Synopsis Identifying Dark Matter Burners in the Galactic Center by :
Download or read book Identifying Dark Matter Burners in the Galactic Center written by and published by . This book was released on 2007 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt: If the supermassive black hole (SMBH) at the center of our Galaxy grew adiabatically, then a dense ''spike'' of dark matter is expected to have formed around it. Assuming that dark matter is composed primarily of weakly interacting massive particles (WIMPs), a star orbiting close enough to the SMBH can capture WIMPs at an extremely high rate. The stellar luminosity due to annihilation of captured WIMPs in the stellar core may be comparable to or even exceed the luminosity of the star due to thermonuclear burning. The model thus predicts the existence of unusual stars, i.e. ''WIMP burners'', in the vicinity of an adiabatically grown SMBH. We find that the most efficient WIMP burners are stars with degenerate electron cores, e.g. white dwarfs (WD) or degenerate cores with envelopes. If found, such stars would provide evidence for the existence of particle dark matter and could possibly be used to establish its density profile. In our previous paper we computed the luminosity from WIMP burning for a range of dark matter spike density profiles, degenerate core masses, and distances from the SMBH. Here we compare our results with the observed stars closest to the Galactic center and find that they could be consistent with WIMP burners in the form of degenerate cores with envelopes. We also cross-check the WIMP burner hypothesis with the EGRET observed flux of gamma-rays from the Galactic center, which imposes a constraint on the dark matter spike density profile and annihilation cross-section. We find that the EGRET data is consistent with the WIMP burner hypothesis. New high precision measurements by GLAST will confirm or set stringent limits on a dark matter spike at the Galactic center, which will in turn support or set stringent limits on the existence of WIMP burners at the Galactic center.
Download or read book Dark Matter Burners written by and published by . This book was released on 2007 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: We show that a star orbiting close enough to an adiabatically grown supermassive black hole (SMBH) can capture weakly interacting massive particles (WIMPs) at an extremely high rate. The stellar luminosity due to annihilation of captured WIMPs in the stellar core may be comparable to or even exceed the luminosity of the star due to thermonuclear burning. The model thus predicts the existence of unusual stars, essentially WIMP burners, in the vicinity of a SMBH. We find that the most efficient WIMP burners are stars with degenerate electron cores, e.g. white dwarfs (WDs); such WDs may have a very high surface temperature. If found, such stars would provide evidence for the existence of particle dark matter and can possibly be used to establish its density profile. On the other hand, the lack of such unusual stars may provide constraints on the WIMP density near the SMBH, as well as the WIMP-nucleus scattering and pair annihilation cross-sections.
Download or read book Dark Matter Burners written by L. Wai and published by . This book was released on 2006 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: We show that a star orbiting close enough to an adiabatically grown supermassive black hole can capture a large number of weakly interacting massive particles (WIMPs) during its lifetime. WIMP annihilation energy release in low- to medium-mass stars is comparable with or even exceeds the luminosity of such stars due to thermonuclear burning. The excessive energy release in the stellar core may result in an evolution scenario different from what is expected for a regular star. The model thus predicts the existence of unusual stars within the central parsec of galactic nuclei. If found, such stars would provide evidence for the existence of particle dark matter. The excess luminosity of such stars attributed to WIMP ''burning'' can be used to infer the local WIMP matter density. A white dwarf with a highly eccentric orbit around the central black hole may exhibit variations in brightness correlated with the orbital phase. On the other hand, white dwarfs shown to lack such orbital brightness variations can be used to provide constraints on WIMP matter density, WIMP-nucleus scattering and pair annihilation cross sections.
Book Synopsis Particle Dark Matter by : Gianfranco Bertone
Download or read book Particle Dark Matter written by Gianfranco Bertone and published by Cambridge University Press. This book was released on 2010-01-07 with total page 763 pages. Available in PDF, EPUB and Kindle. Book excerpt: Describes the dark matter problem in particle physics, astrophysics and cosmology for graduate students and researchers.
Book Synopsis Dark Matter in Astroparticle and Particle Physics by : Hans Volker Klapdor-Kleingrothaus
Download or read book Dark Matter in Astroparticle and Particle Physics written by Hans Volker Klapdor-Kleingrothaus and published by World Scientific. This book was released on 2008 with total page 654 pages. Available in PDF, EPUB and Kindle. Book excerpt: Social networks have emerged as a major trend in computing and social paradigms in the past few years. The social network model helps to inform the study of community behavior, allowing qualitative and quantitative assessments of how people communicate and the rules that govern communication. Social Networking and Community Behavior Modeling: Qualitative and Quantitative Measures provides a clear and consolidated view of current social network models. This work explores new methods for modeling, characterizing, and constructing social networks. Chapters contained in this book study critical security issues confronting social networking, the emergence of new mobile social networking devices and applications, network robustness, and how social networks impact the business aspects of organizations.
Download or read book Dark Matter written by Tony Watkins and published by InterVarsity Press. This book was released on 2006-01-01 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: Uses a Christian perspective to interpret the popular trilogy, offering a look Pullman's life, an overview of the major dimensions of each book, and a critical evaluation of such major themes as sin and the death of God.
Download or read book Dark Matter written by Blake Crouch and published by Ballantine Books. This book was released on 2016-07-26 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt: NEW YORK TIMES BESTSELLER • COMING SOON TO APPLE TV+ • A “mind-blowing” (Entertainment Weekly) speculative thriller about an ordinary man who awakens in a world inexplicably different from the reality he thought he knew—from the author of Upgrade, Recursion, and the Wayward Pines trilogy “Are you happy with your life?” Those are the last words Jason Dessen hears before the kidnapper knocks him unconscious. Before he awakens to find himself strapped to a gurney, surrounded by strangers in hazmat suits. Before a man he’s never met smiles down at him and says, “Welcome back, my friend.” In this world he’s woken up to, Jason’s life is not the one he knows. His wife is not his wife. His son was never born. And Jason is not an ordinary college professor but a celebrated genius who has achieved something remarkable. Something impossible. Is it this life or the other that’s the dream? And even if the home he remembers is real, how will Jason make it back to the family he loves? From the bestselling author Blake Crouch, Dark Matter is a mind-bending thriller about choices, paths not taken, and how far we’ll go to claim the lives we dream of.
Download or read book Dark Matters written by Ryan M. Williams and published by Glittering Throng Press. This book was released on 2008-06-30 with total page 237 pages. Available in PDF, EPUB and Kindle. Book excerpt: Brock Marsden isn’t quite human any longer. Using technology from the Galactics, Brock incorporated DNA from other species into himself. It gained him longevity, better vision, and faster reflexes. All traits valuable when tracking down the worst killers on the planet. A banker hires Brock to track down the being that murdered and mutilated his daughter. Brock’s partner at their detective agency saddles Brock with an alien intern. With a complicated love life, a police chief who’d like to shut him out of the case, and a threat from his distant past—Brock faces a case like none other. It will take all of Brock’s alien-enhanced abilities to stop this killer—and maybe more than he imagines.
Book Synopsis The First Glast Symposium by : Steven Ritz
Download or read book The First Glast Symposium written by Steven Ritz and published by American Institute of Physics. This book was released on 2007-08-07 with total page 640 pages. Available in PDF, EPUB and Kindle. Book excerpt: The GLAST Symposia provide a forum for the exchange of information across a broad range of scientific investigations. GLAST, NASA's new gamma-ray observatory, opens a new window into the universe. GLAST data will enable scientists to answer questions that arise within a broad range of topics, including super massive black hole systems, pulsars, gamma-ray bursts, the origin of cosmic rays, and searches for signals of new physics.
Download or read book A Dark Matter written by Peter Straub and published by Anchor. This book was released on 2010-02-09 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt: NEW YORK TIMES BESTSELLER • “One of the most adroit masters of the supernatural thriller” (San Francisco Chronicle) delivers a chilling novel about a man seeking the truth about what happened on a horrifying night on a Midwestern campus in the 1960s. • "Terrifying.... Impossible to put down." —Stephen King On a college campus, a charismatic guru and his young acolytes perform a secret ritual in a local meadow. What happens is a mystery—all that remains is a gruesomely dismembered body and the shattered souls of all who were present. Forty years later, one man seeks to learn about that horrifying night, and to do so he’ll have to force those involved to examine the unspeakable events that have haunted them ever since.
Download or read book Burner written by Mark Greaney and published by Penguin. This book was released on 2023-02-21 with total page 529 pages. Available in PDF, EPUB and Kindle. Book excerpt: Court Gentry is caught between the Russian mafia and the CIA in this latest electrifying thriller in the #1 New York Times bestselling Gray Man series. When you kick over a rock, you never know what's going to crawl out. Alex Velesky is about to discover that the hard way. He's stolen records from the Swiss bank that employs him, thinking that he'll uncover a criminal conspiracy. But he soon finds that he's tapped into the mother lode of corruption. Before he knows it, he's being hunted by everyone from the Russian mafia to the CIA. Court Gentry and his erstwhile lover, Zoya Zakharova, find themselves on opposites poles when it comes to Velesky. They both want him but for different reasons. That's a problem for tomorrow. Today they need to keep him and themselves alive. Right now, it's not looking good.
Book Synopsis The Other Dark Matter by : Lina Zeldovich
Download or read book The Other Dark Matter written by Lina Zeldovich and published by University of Chicago Press. This book was released on 2021-11-19 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: The history of human waste. How I learned to love the excrement; The early history of human excreta; Treasure nigh soil as if it were gold!; The water closet dilemma and the sewage farm paradigm; Germs, fertilizer, and the poop police -- The present: a sludge revolution in progress. The great sewage time bomb and the redistribution of nutrients on the planet; Loowatt, a loo that turns waste into watts; The crap that cooks your dinner and container-based sanitation; HomeBiogas : your personal digester in a box; Made in New York; Lystek, the home of sewage smoothies; How DC water makes biosolids BLOOM; From biosolids to biofuels -- The future of medicine and other things; Poop : the best (and cheapest medicine; Looking where the sun doesn't shine; From the kindness of one's gut : an insider look into stool banks -- Afterword : breathing poetry into poop.
Book Synopsis Low Temperature Detectors for Neutrinos and Dark Matter by : Klaus Pretzl
Download or read book Low Temperature Detectors for Neutrinos and Dark Matter written by Klaus Pretzl and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 169 pages. Available in PDF, EPUB and Kindle. Book excerpt: For the last few years astrophysicists and elementary particle physicists have been working jointly on the following fascinating phenomena: 1. The solar neutrino puzzle and the question: What happens to the neutrinos on their way from the sun to the earth? 2. The growing evidence that our universe is filled with about 10 times more matter than is visible and the question: What is dark matter made of? 3. The supernovae explosions and the question: What do neutrinos tell us about such explosions and vice versa? The experimental investigation of these phenomena is difficult and involves unconventional techniques. These are presently under development, and bring together such seemingly disparate disciplines as astrophysics and elementary particle physics on the one hand and superconductivity and solid-state physics on the other. This book contains the proceedings of a workshop held in March 1987 at which the above subjects and their experimental investigation were discussed. The proposed experimental methods are very new. They involve frontier developments in low temperature and solid-state physics. The book should be useful to researchers and students who actively work on these subjects or plan to enter the field. It also offers the non-expert reader with some physics background a good survey of the activities in this field.
Book Synopsis Gas Burners Old and New by : Owen Merriman
Download or read book Gas Burners Old and New written by Owen Merriman and published by . This book was released on 1884 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Low Temperature Detectors for Neutrinos and Dark Matter IV by : Norman E. Booth
Download or read book Low Temperature Detectors for Neutrinos and Dark Matter IV written by Norman E. Booth and published by Atlantica Séguier Frontières. This book was released on 1992 with total page 542 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :Assistant Professor Critical Dance Studies Imani Kai Johnson Publisher :Oxford University Press ISBN 13 :0190856696 Total Pages :257 pages Book Rating :4.1/5 (98 download)
Book Synopsis Dark Matter in Breaking Cyphers by : Assistant Professor Critical Dance Studies Imani Kai Johnson
Download or read book Dark Matter in Breaking Cyphers written by Assistant Professor Critical Dance Studies Imani Kai Johnson and published by Oxford University Press. This book was released on 2022-10-07 with total page 257 pages. Available in PDF, EPUB and Kindle. Book excerpt: The dance circle (called the cypher) is a common signifier of breaking culture, known more for its spectacular moves than as a ritual practice with foundations in Africanist aesthetics. Yet those foundations--evident in expressive qualities like call and response, the aural kinesthetic, the imperative to be original, and more--are essential to cyphering's enduring presence on the global stage. What can cyphers activate beyond the spectacle? What lessons do cyphers offer about moving through and navigating the social world? And what possibilities for the future do they animate? With an interdisciplinary reach and a riff on physics, author Imani Kai Johnson centers the voices of practitioners in a study of breaking events in cities across the US, Canada, and parts of Europe. Dark Matter in Breaking Cyphers: the Life of Africanist Aesthetics in Global Hip Hop draws on over a decade of research and provides a detailed look into the vitality of Africanist aesthetics and the epistemological possibilities of the ritual circle.
Download or read book Burner written by Richard Thomas and published by iUniverse. This book was released on 2006-02 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt: Burner is the study-in-motion of Isaac BenGurian, a cerebral, tortured man to whom both Socrates and Attila the Hun would offer a respectful nod. His grasp of the physical sciences, computer technology, and literature is unparalleled. But these "tricks of the mind" do not nourish his pride, nor do they define him with any degree of accuracy. To know him, one must look to the nightmare of his personal history, and to the leisure-time pursuit for which he has developed a considerable passion: Isaac roots out modern-day "monsters"-sociopaths who are above the law in every practical sense, men who rejoice in the abuse of their power-and revels in the simple joy of dispatching them. Attention to detail has always placed him beyond the reach of the law. But Isaac has just made the costly mistake of compassion, and his error has left a trail that is being followed by the crime family of his latest victim. And another, far more adept, tracker has taken up the trail: An "artificial intelligence" program, developed by a humble Princeton scientist and funded by the US government, has been assigned to find him, and its analytical abilities far surpass his own.
