EASTER 2018 Widden Whinnies Inglis Easter Crackers
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Black-Hole Binaries, Gravitational Waves, and Numerical Relativity
Black-hole binaries, gravitational waves, and numerical relativity Joan Centrella∗ and John G. Baker† Gravitational Astrophysics Laboratory, NASA/GSFC, 8800 Greenbelt Road, Greenbelt, Maryland 20771, USA Bernard J. Kelly‡ and James R. van Meter§ CRESST and Gravitational Astrophysics Laboratory, NASA/GSFC, 8800 Greenbelt Road, Greenbelt, Maryland 20771, USA and Department of Physics, University of Maryland, Baltimore County, 1000 Hilltop Circle, Baltimore, Maryland 21250, USA (Dated: November 30, 2010) Understanding the predictions of general relativity for the dynamical interactions of two black holes has been a long-standing unsolved problem in theoretical physics. Black-hole mergers are monu- mental astrophysical events, releasing tremendous amounts of energy in the form of gravitational radiation, and are key sources for both ground- and space-based gravitational-wave detectors. The black-hole merger dynamics and the resulting gravitational waveforms can only be calculated through numerical simulations of Einstein’s equations of general relativity. For many years, nu- merical relativists attempting to model these mergers encountered a host of problems, causing their codes to crash after just a fraction of a binary orbit could be simulated. Recently, however, a series of dramatic advances in numerical relativity has allowed stable, robust black-hole merger simulations. This remarkable progress in the rapidly maturing field of numerical relativity, and the new understanding of black-hole binary dynamics that is emerging is chronicled. Important applications of these fundamental physics results to astrophysics, to gravitational-wave astronomy, and in other areas are also discussed. Contents G. Numerical Approximation Methods 15 H. Extracting the Physics 15 I. Prelude 2 V. Black-Hole Merger Dynamics and Waveforms 16 II. -
Are Gamma-Ray Bursts Signals of Supermassive Black Hole Formation?
Are Gamma-Ray Bursts Signals of Supermassive Black Hole Formation? K. Abazajian, G. Fuller, X. Shi Department of Physics, University of California, San Diego, La Jolla, California 92093-0350 Abstract. The formation of supermassive black holes through the gravitational 4 collapse of supermassive objects (M ∼> 5 × 10 M⊙) has been proposed as a source of cosmological γ-ray bursts. The major advantage of this model is that such collapses are far more energetic than stellar-remnant mergers. The major drawback of this idea is the severe baryon loading problem in one-dimensional models. We can show that the observed log N − log P (number vs. peak flux) distribution for gamma-ray bursts in the BATSE database is not inconsistent with an identification of supermassive object collapse as the origin of the gamma-ray bursts. This conclusion is valid for a range of plausible cosmological and γ-ray burst spectral parameters. 1. Introduction We investigate aspects of a recent model for the internal engine powering γ-ray bursts (GRBs). This model produces a GRB fireball through neutrino emission and annihilation during the collapse of a supermassive object into a black hole (Fuller & Shi, 1998). This supermassive object may either be a relativistic cluster of stars or a single supermassive star. The collapse of a supermassive object provides an exceedingly large amount of energy to power the burst, much higher than the amount of energy available in stellar remnant models. In addition, the rate of collapse of these objects–when associated with galaxy-type structures–is arXiv:astro-ph/9812287v1 15 Dec 1998 similar to the GRB rate. -
Horse Racing
MONDAY, FEBRUARY 25, 2019 HORSE RACING: BOTH THE MAXIMUS MISCHIEF RULED OUT OF FOUNTAIN OF YOUTH KINDEST AND Cash is King LLC and LC Racing=s Maximus Mischief (Into Mischief) has been ruled out of Saturday=s GII Xpressbet CRUELEST GAME Fountain of Youth S. at Gulfstream Park following a sub-par work in Hallandale Sunday morning. AThe horse didn=t breeze too good, so he is out of the Fountain of Youth,@ trainer Butch Reid told the Gulfstream press office. AHe just kind of went through the motions. The jockey wasn=t happy with the way he galloped out. All things considered, we=re going to go back to the drawing board and look for another spot.@ Maximus Mischief breezed a half-mile in :49.02 (11/58) under jockey Jose Ortiz at Gulfstream Park Sunday. Cont. p6 IN TDN EUROPE TODAY TIME FOR THE CURRAGH TO SEIZE THE DAY Battle of Midway after winning the 2017 Jack Cantillon pens an op/ed ahead of the reopening of The GI Breeders= Cup Dirt Mile | Breeders= Cup/Eclipse Sportswire Curragh in April, which just underwent a major renovation. Click or tap here to go straight to TDN Europe. The Week in Review, by Bill Finley It's universally understood that horse racing is a roller coaster. You're on top, you're on the bottom, you're back on top, again, and things never do travel in a straight line. But perhaps no trainer has experienced such a wild swing of fortune within such a short period of time as Jerry Hollendorfer did Saturday. -
Gamma Ray Bursts from Stellar Collisions
CORE Metadata, citation and similar papers at core.ac.uk Provided by CERN Document Server Gamma Ray Bursts from Stellar Collisions Brad M.S. Hansen & Chigurupati Murali Canadian Institute for Theoretical Astrophysics University of Toronto, Toronto, ON M5S 3H8, Canada Received ; accepted –2– ABSTRACT We propose that the cosmological gamma ray bursts arise from the collapse of neutron stars to black holes triggered by collisions or mergers with main sequence stars. This scenario represents a cosmological history qualitatively different from most previous theories because it contains a significant contribution from an old stellar population, namely the globular clusters. Furthermore, the gas poor central regions of globular clusters provide an ideal environment for the generation of the recently confirmed afterglows via the fireball scenario. Collisions resulting from neutron star birth kicks in close binaries may also contribute to the overall rate and should lead to associations between some gamma ray bursts and supernovae of type Ib/c. Subject headings: stars:neutron–supernovae:general–globular clusters:general– gamma rays:bursts– Galaxy:evolution –3– 1. Introduction The detection of X-ray, optical and radio afterglows from gamma-ray burst events (Costa et al 1997; van Paradijs et al 1997, Sahu et al 1997; Frail et al 1997) and concommitant redshifts (Metzger et al 1997) has provided strong support for the cosmological origin of the phenomenon. The success of the fireball model (Cavallo & Rees 1978; Rees & Meszaros 1992; Meszaros & Rees 1993) is largely independent of the origin of the energy, requiring only an energetic and baryon-poor event confined to small scales, thereby giving rise to a relativistic and optically thick outflow. -
Black Caviar & Champagne
MOONEE VALLEY RACING club SUMMER 2011 $6.95 (INC GST) On The Pulse A Brazilian Beauty Article by Adrian Dunn DESERT STAR BRUCE CLARK’S DUBAI Luke Nolen Black Caviar & Champagne Article by Andrew Garvey THINK TWICEThe Rise and Rise of So You Think Features from John Costello & Tony Bourke BLACK CAVIARBy ANDREW GARVEY dEspITE pETEr MOOdy’s BravE FacE aT ThE MEdIa cOnFErEncE TwO days BEFOrE ThE wIllIaM rEId sTakEs lasT FEBruary, ThE TraInEr KNEW THE CHANCE FOR groUP OnE vIctory On ThE rEsuME OF hIs OuTsTandIng FIlly Black cavIar MIghT havE passEd FOrEvEr. hile the prognosis for her racing future was good, the suspensory injury she had Wjust incurred, combined with her bulk and subsequent stress on her legs, there were no guarantees The trainer was initially attracted to the Bel Esprit filly by the about her future. fact that she was closely related to his former Group One Fast forward to Flemington on the final day of the 2010 winning sprinter, Magnus. Spring Racing Carnival. With an emotional victory by Black Caviar in the Patinack Farm Stakes, a husky-voiced Moody “EVERYONE HAS DONE A GREAT sounded like he had been urging on his mare with every JOB In hElpIng to gET hEr stride. Back, BuT MIchaEl Is OnE OF The public and indeed her owners, who Moody describes ThE unsung hErOEs In My as “absolutely tremendous” in leaving the training to the sTaBlE and has dOnE a lot trainer, might have expected the victory at the highest level OF wOrk wITh hEr” to come eventually. But for her trainer, the win was a relief In the spring of 2009, Black caviar had been scheduled to run as much as a triumph. -
=Gold Standard (AUS) Chestnut Horse; Sep 17, 2014 View Complete Auction History 6 Starts, G2 Winner Click Here for Interactive Nicking
equineline.com Product 10N 02/26/20 02:07:01 EST =Gold Standard (AUS) Chestnut Horse; Sep 17, 2014 View Complete Auction History 6 Starts, G2 winner Click here for Interactive Nicking Hail to Reason, 58 br Halo, 69 dk b/ Cosmah, 53 b Southern Halo, 83 b Northern Dancer, 61 b Northern Sea, 74 b Sea Saga, 68 ch More Than Ready, 97 dk b/ Mr. Prospector, 70 b Woodman, 83 ch Playmate, 75 ch Woodman's Girl, 90 b Naskra, 67 b Becky Be Good, 81 b Good Landing, 65 b =Sebring (AUS), 05 ch Danzig, 77 b Danehill, 86 b Razyana, 81 b =Flying Spur (AUS), 92 b Mr. Prospector, 70 b Rolls, 84 ch Grand Luxe, 74 ch =Purespeed (AUS), 98 b =Kaoru Star (AUS), 65 ch =Luskin Star (AUS), 74 ch =Promising (NZ), 68 ch =Lady Moulin (AUS), 82 b =Better Boy (IRE), 51 b =Willowy (AUS), 73 br =Far Vista (AUS), 66 br =Gold Standard (AUS) Chestnut Horse Sir Ivor, 65 b Foaled Sep 17, 2014 *Sir Tristram, 71 b in Australia Isolt, 61 b =Grosvenor (NZ), 79 b 6 Starts =Hermes (GB), 63 b G2 winner =My Tricia (NZ), 74 br =Gay Poss (NZ), 66 b =Greig, 88 b =Todman (AUS), 54 ch =Imposing (AUS), 75 ch =Hialeah (AUS), 63 ch =Solveig (NZ), 81 br =Sobig (NZ), 61 br =Soliloquy (NZ), 71 br =Princess Patine (NZ), 65 =Coniston Gem (AUS), 01 b b Raise a Native, 61 ch Mr. Prospector, 70 b Gold Digger, 62 b Gold Carat, 83 b Tom Rolfe, 62 b Gaite, 74 b Gay Matelda, 65 dk b/ =No Telling (AUS), 89 ch Never Bend, 60 dk b Namnan, 69 gr Come Hither Look, 62 gr =Secret Message (AUS), 80 ch Midsummer Night, 57 ch =Decipher, 66 b =Cipher (GB), 57 b Breeder: Mr. -
King's Legacy (Aus)
DANZIG (USA) DANEHILL (USA) RAZYANA (USA) REDOUTE'S CHOICE (AUS) CANNY LAD (AUS) SHANTHA'S CHOICE KING'S LEGACY (AUS) DANCING SHOW (AUS) (2017) MR PROSPECTOR A BAY COLT HUSSONET (USA) SACAHUISTA (USA) BREAKFAST IN BED (AUS) (2009) SUNDAY SILENCE BELLA SUNDAY (AUS) SINGLES BAR (AUS) KING'S LEGACY (AUS) (c. by Redoute’s Choice (AUS)), won 3 races at 2 years and £517,111 viz Inglis Sires, Randwick, Gr.1, Moet & Chandon Champagne Stakes, Randwick, Gr.1, Magic Millions B.J. McLachlan Stakes, Eagle Farm, Gr.3, placed twice including third in De Bortoli Wines Golden Rose, Rosehill, Gr.1. 1st Dam Breakfast In Bed (AUS) (by Hussonet (USA)), won 7 races at 3 to 5 years and £166,567, placed 11 times including second in Kingston Park Just Now H., Doomben, L., Evergreen Turf Nudgee Fillies And Mares H., Doomben, L., third in Sky Racing Gai Waterhouse Classic, Ipswich, L. Dam of two winners including: KING'S LEGACY (AUS) (2017 c. by Redoute's Choice (AUS)), See above. 2nd Dam BELLA SUNDAY (AUS) (by Sunday Silence (USA)), won 2 races at 3 years and £22,493, placed 3 times. Dam of nine winners including: OOHOOD (AUS) (f. by I Am Invincible (AUS)), won 1 race at 3 years and £836,741 viz Darley Flight Stakes, Randwick, Gr.1, placed 9 times viz second in Longines Golden Slipper, Rosehill, Gr.1, Inglis Sires Produce Stakes, Randwick, Gr.1, Ladbrokes Blue Diamond Prelude, Caulfield, Gr.2, Thoroughbred Club Merson Cooper Stakes, Ladbrokes Park Sandown Hillside, L., third in Ladbrokes Caulfield Guineas, Caulfield, Gr.1, Ladbrokes Blue Diamond Stakes, Caulfield, Gr.1, Ladbrokes Blue Diamond Preview, Caulfield, Gr.3, fourth in Darley Furious Stakes, Randwick, Gr.2, Darley Tea Rose Stakes, Randwick, Gr.2. -
Racing Club No 1 Ltd Prospectus 5Th October 2017
Racing Club No 1 Ltd Prospectus 5th October 2017 RACING CLUB NO 1 LTD A.C.N. 621 611 809 AFS Rep. No. 001258523 PROSPECTUS 5th October 2017 Registered Office: Nexus Norwest, Level 5, 4 Columbia Court, Baulkham Hills NSW 2153 Administration Office: P.O. Box 6992 Baulkham Hills BC NSW 2153 Phone: 1800 687 066 Fax: (02) 9672 6412 Website: www.racingclub.net.au Email: [email protected] _____________________________________________________________________ This prospectus is dated and was lodged with the Australian Securities and Investments Commission (ASIC) on 5th October 2017. No responsibility as to the contents of this prospectus is taken by ASIC. No securities will be issued on the basis of this prospectus later than 12 months after the date of this prospectus. Secret Agenda Winning Owners Prospectus This document is issued by Racing Club No 1 Ltd (‘RCN1’) ACN 621 611 809 (‘Company’, ‘Club’ or ‘RC’). Racing Club No 1 Ltd is an authorised representative (authorised representative no. 001258523) of Blueblood Thoroughbreds (AUST) Pty Ltd (‘BBT’), holder of Australian financial services (“AFS”) licence number 413585. The owners by whole or part of the horses will be Racing Club No 1 Ltd a Company Racing Syndicate registered with the Queensland Racing Integrity Commission (‘QRIC’). Racing under its Registered Company Name “Racing Club No 1 Ltd”. This Prospectus is dated 5 October 2017 and was lodged with the Australian Securities and Investments Commission (‘ASIC’) on that date. ASIC takes no responsibility as to the contents of this Prospectus. No shares will be issued on the basis of this Prospectus later than 12 months after the date of this Prospectus. -
Get Your Fun Back on Track
SYDNEY AUTUMN Get your RACING CARNIVAL fun back » 13 MAR - 24 APR » ROYAL RANDWICK on track » ROSEHILL GARDENS 2021 MEDIA GUIDE 01 A COVID-SAFE CONTENTS CARNIVAL COVID Safety In addition to full compliance with 05 34 strict NSW Public Health Orders, the CHAIRMAN’S WELCOME Australian Turf Club (ATC) is taking a SCHWEPPES ALL AGED STAKES DAY proactive approach to minimise the risk of exposure to COVID-19. ATC is committed to the health and well-being of all people visiting and working at 06 38 all of our venues with CovidSafe plans CALENDAR OF MEDIA EVENTS including and not limited to: HORSES TO WATCH » Hand sanitiser placed regularly at all venues » Routine cleaning of all venues during 07 raceday and meetings & events MAJOR PARTNERS & AUSTRALIAN TURF 40 CLUB FOUNDATION JOCKEYS TO WATCH The Australian Turf Club, reserves the right to REFUSE ENTRY, in the event; a) Displays symptoms related to 08 42 COVID-19 RACING FIGURES & WAGERING FACTS TRAINERS TO WATCH b) Have visited identified venue Hotspot, or; c) Live in &/or visited identified Hotspot locations or Local 09 44 Government Area. EVEREST CARNIVAL FACTS & FIGURES CARNIVAL HOSPITALITY ALL MEDIA intending to participate on this day, must be formally accredited by the Australian Turf Club, pre-register and provide their contact details. This 10 is mandatory, imposed by governing SYDNEY AUTUMN RACING CARNIVAL 46 health authorities, ensuring ‘tracking STYLE & BEAUTY and tracing’ protocols are enabled in the RACEDAY SUMMARY event an outbreak is recognised. Physical distancing restrictions will be in place and policed by ATC Staff, ensuring 2m2 &/or 1.5m physical distancing are 12 50 adhered to by people on course. -
Everest Carnival
EVEREST Get your CARNIVAL fun back » 19 SEP - 31 OCT on track 2020 MEDIA GUIDE 01 A COVIDSAFE CONTENTS EVEREST CARNIVAL COVID Safety In addition to full compliance with 05 24 strict NSW Public Health Orders, the Australian Turf Club (ATC) is taking a CHAIRMAN’S WELCOME CITY TATTERSALLS CLUB CUP DAY proactive approach to minimise the risk of exposure to COVID-19. ATC is committed to the health and well-being of all people visiting and working at 06 26 all of our venues with CovidSafe plans including and not limited to: MAJOR PARTNERS GOLDEN EAGLE DAY » All patrons tested on arrival with temperature scanning equipment » Hand sanitiser placed regularly at all venues 07 28 » Routine cleaning of all venues during CALENDAR OF MEDIA EVENTS HORSES TO WATCH raceday and meetings & events 08 30 The Australian Turf Club, reserves the ATC FOUNDATION right to REFUSE ENTRY, in the event; JOCKEYS TO WATCH a) A patron registers a temperature of >37.5c; b) Resides from the state of Victoria c) Displays symptoms related to 09 32 COVID-19 EVEREST CARNIVAL FACTS & FIGURES d) Have visited identified venue TRAINERS TO WATCH Hotspot, or; e) Live in &/or visited identified Hotspot locations or Local 10 Government Area. EVEREST CARNIVAL RACEDAY SUMMARY 34 ALL MEDIA intending to participate on CARNIVAL HOSPITALITY this day, must be formally accredited by the Australian Turf Club, pre-register and provide their contact details. This 12 is mandatory, imposed by governing health authorities, ensuring ‘tracking FUJITSU GEORGE MAIN STAKES DAY 36 and tracing’ protocols are enabled in the STYLE & BEAUTY event an outbreak is recognised. -
The Time of Perihelion Passage and the Longitude of Perihelion of Nemesis
The Time of Perihelion Passage and the Longitude of Perihelion of Nemesis Glen W. Deen 820 Baxter Drive, Plano, TX 75025 phone (972) 517-6980, e-mail [email protected] Natural Philosophy Alliance Conference Albuquerque, N.M., April 9, 2008 Abstract If Nemesis, a hypothetical solar companion star, periodically passes through the asteroid belt, it should have perturbed the orbits of the planets substantially, especially near times of perihelion passage. Yet almost no such perturbations have been detected. This can be explained if Nemesis is comprised of two stars with complementary orbits such that their perturbing accelerations tend to cancel at the Sun. If these orbits are also inclined by 90° to the ecliptic plane, the planet orbit perturbations could have been minimal even if acceleration cancellation was not perfect. This would be especially true for planets that were all on the opposite side of the Sun from Nemesis during the passage. With this in mind, a search was made for significant planet alignments. On July 5, 2079 Mercury, Earth, Mars+180°, and Jupiter will align with each other at a mean polar longitude of 102.161°±0.206°. Nemesis A, a brown dwarf star, is expected to approach from the south and arrive 180° away at a perihelion longitude of 282.161°±0.206° and at a perihelion distance of 3.971 AU, the 3/2 resonance with Jupiter at that time. On July 13, 2079 Saturn, Uranus, and Neptune+180° will align at a mean polar longitude of 299.155°±0.008°. Nemesis B, a white dwarf star, is expected to approach from the north and arrive at that same longitude and at a perihelion distance of 67.25 AU, outside the Kuiper Belt. -
Colliding Stars Spark Rush to Solve Cosmic Mysteries Stellar Collision Confirms Theoretical Predictions About the Periodic Table
Colliding stars spark rush to solve cosmic mysteries Stellar collision confirms theoretical predictions about the periodic table. • Davide Castelvecchi Neutron stars set to open their heavy hearts The collision generated the strongest and longest-lasting gravitational-wave signal ever seen on Earth. And the visible-light signal generated during the collision closely matches predictions made in recent years by theoretical astrophysicists, who hold that many elements of the periodic table that are heavier than iron are formed as a result of such stellar collisions. Neutron-star mergers are also thought to trigger previously mysterious short γ-ray bursts, a hypothesis that now also seems to have been confirmed. Astronomers have good reasons to believe that they are looking at the same source of both the gravitational waves and the short γ-ray bursts, says Cole Miller, an astronomer at the University of Maryland in College Park, who was not involved in the research but who has seen some of the papers ahead of their publication. Bright object The event was detected on Earth on 17 August, and triggered weeks of febrile, round-the-clock activity on all 7 continents, as more than 70 teams of researchers scrambled to observe the aftermath. The collision was felt first as a space-time tremor by the Laser Interferometer Gravitational-wave Observatory (LIGO) in the United States and by its Italy-based counterpart Virgo, and seen seconds afterwards as a smattering of high-energy photons by NASA’s Fermi Gamma-ray Space Telescope. Global networks of small telescopes will chase companion signals of gravitational waves Alerted by the LIGO–Virgo team, astronomers then raced to find and study what was seen as a bright object in the sky using telescopes big and small, famous and obscure, on land and in orbit, and spanning the spectrum of electromagnetic radiation, from radio waves to X-rays.