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In 2007, R Coronae Borealis (R CrB) went into a historically deep and long decline. ... The evidence pointing toward a white dwarf merger or a final-helium-shell flash origin for R CrB is contradictory. ... Along with the fact that R CrB shows significant lithium in its atmosphere, this supports the final-helium-shell flash. However, the relatively high inferred mass of R CrB and its high fluorine abundance support a white dwarf merger. ...

Hideyuki Saio Simon Jeffery are exploring models for the evolution of stars formed by the merger of two white dwarfs. The attached movie provides a simulation of the major events involved in the merger process. ... An initial binary system consists of two white dwarfs of masses M 1 and M 2 (given) with an orbital period ( P ). ... We adopt a simple expression for the white dwarf radius as a function of mass (in solar units): . ... The merged star evolution is simulated by a quadratic expansion . ...

White Dwarfs . IP Pegasi: Spiral Star . ... Image of a white dwarf that has spiral arms of gas around it. The white dwarf is in a binary star system and the spiral arms are part of an accretion disk. ... A white dwarf(blue center star) has somehow thrown off gas to form the planetary nebula that surrounds the star. ... Astronomers believe that so much gas accumulated onto the star that the star just exploded causing the gas to form a ring around the white dwarf . White Dwarf Stars Cool . ...

... Red stars are cool, with temperatures of around 3,000 degrees Kelvin (K), while blue stars are hotter and can have temperatures over 30,000 degrees K. Our own lovely yellow Sun's temperature is a comforting 6,000 degrees K. Star Trails in Northern Skies . ... Aurora Astern . ... Well, probably not ... but it is the most active volcanic moon. Active volcanoes on Jupiter's moon Io were a surprise discovery of the Voyager missions of the late 1970s. Comet-like Clouds in the Cartwheel Galaxy . ...

ATNF Home . ... About ATNF overview . ... Australia Telescope Steering Committee . ... Australia Telescope User Committee . ... Murchison Radio-astronomy Observatory . ... Parkes radio telescope . ... ATCA | ... Visiting Parkes radio telescope . ... Parkes radio telescope webcam . ... The Australia Telescope National Facility Colloquium . ... Binaries consisting of a magnetic white dwarf in near synchronous rotation . ... white dwarf planetary systems and present a simple model to predict radio flux . ...

Proposal Identification No.: P2534 Date Received: 2009-Sep-30 16:22:58 Technical Page Proposal Type: General Category: Observation Category: Total Time Requested: Minimum Useful Time: Prop osal Title: ABSTRACT: Regular Pulsars 2.5 Hours Searching for a radio pulsar around an extremely low-mass white dwarf Low-mass white dwarfs are the prototypical companions of highly recycled millisecond pulsars. ... This proposal requires coordination with GPS L3 at 1381 MHz. ...

... November 2, 1997 . White Dwarf Stars Cool . Credit: H. Richer ( UBC ), NASA . Explanation: Diminutive by stellar standards , white dwarf stars are also intensely hot ... but they are cooling. ... Here, researchers have discovered a large concentration of white dwarf stars (circled above). ... Studying how these stars cool could lead to a better understanding of their ages, of the age of their parent globular cluster, and even the age of our universe! ... About APOD > . ...

The stability of planetary systems after stellar mass loss : Prospects for White Dwarf planets and pollution Alexander James Mustill1*, Dimitri Veras2, Eva Villaver3, Amy Bonsor4, Boris GДnsicke2, Mark Wyatt 1 2 5 Lund Observatory ... 1TL, United Kingdom 5 Institute of Astronomy, University of Cambridge, Madingley Road, CB3 9ET, UK *alex@astro.lu.se Stars lose mass as they evolve to become white dwarfs ( WDs ), and this mass loss can induce ...

This artist's conception shows a binary star system that produces recurrent novae, and ultimately, the supernova PTF 11kx. A red giant star (foreground) loses some of its outer layers though a stellar wind, and some of it forms a disk around a companion white dwarf star. ... When the mass builds up to the near the ultimate limit a white dwarf star can take, it explodes as a type Ia supernova, destroying the white dwarf. ...

... Возьмите с собой книжку из новой серии "Смешарики - малышам". ... Артикул: 22-3552 Цвет: светло-розовый Состав: 100% полиэфир Описание: брюки прямого кроя, утепленные флисом Уход за изделием: машинная стирка при 30њС градусах, без отбеливания Страна дизайна: Россия Страна производства: Китай Товар сертифицирован. ... Цвет: WHITE . Пол: Мальчикам . ... Размер US: M . ... Материал верха: искусственная кожа . ... Кеды на танкетке Michael Michael Kors - Michael Michael Kors - Michael Michael Kors . ...

... RIVER FORECAST LATEST FLOOD FORECAST AND REMARKS POINT READING STAGE GREEN NEAR 63.4 FT 64.0 FT CRESTING NEAR 65.0 FT AROUND AUBURN 300 PM MIDNIGHT TONIGHT.. ... SATSOP NEAR 33.5 FT 34.0 FT CRESTING NEAR FLOOD STAGE SATSOP 300 PM AROUND 5 PM THIS AFTERNOON NISQUALLY NEAR 12.1 FT 10.0 FT CRESTING NEAR 12.5 FT AROUND NATIONAL 230 PM 6 PM THIS EVENING. ... NEW RECORD FORECAST** *RECORD 21.57 FT ON 12/23/33 NACHES NEAR 18.5 FT 17.0 FT CRESTING NEAR 22.0 FT AROUND NACHES NOON 10 PM THIS EVENING. ...

home publications > mercury . SEARCH ASP SITE: Match ALL words Match ANY word . ... ASP Conference Series . ... Publications of the ASP (PASP) . ... Editorial: 2001 is just around the corner . ... Shuttling between "Animals That Kill for Fun" and "Astrology: Science of the Future," I came upon live coverage of construction of the International Space Station. ... The year 2001 is just around the corner, but we've a ways to go to reach the cinematic visions that make us want tomorrow here today. ...

... Number of trailing spiral waves of surface density is equal m=3. ... The experiments have revealed banana-like anticyclonic vortices between the spiral arms in corotation region, drifting together with the spiral arms around the vessel axis, so that the joint spiral-vortex structure is formed. ... Nezlin M.,Rulov A., Snezhkin E. N., Trubnikov A. S., , Self-organizaion of spiral-vortex structures in shallow water with repid differenial rotation , Sov.Phys.JETP, 1987, v.65(1), pp.1-4. ...

Roll Down The anchors are weighed and the sails are unfurled ROLL DOWN We're bound for to take you halfway round the world WALK AROUND ME BRAVE BOYS AND ROLL DOWN AND WE WILL ROLL DOWN WALK AROUND ME BRAVE BOYS AND ROLL DOWN In the white Bay of Biscay the seas will run high These poor simple transports , they'll wish they could die When the white coast of Africa it do appear These poor ...

... Astronomers of the SAO together with an international group of scientists have proposed an explanation to the long-standing mystery of why magnetic fields are more common amongst cool white dwarf stars than amongst young and hotter ones. ... As the result magnetic white dwarfs demonstrate excess in their frequencies in the temperature range below 14000K. The authors also show that the strongly magnetic white dwarfs are of the oldest stars of the Galaxy originated from intermediate-mass relic stars. ...

... Gallery . Simulation Images . Simulations of convection in stars . Side-view of the temperatures in a simulationтАж . Sidebar Left . Sidebar Top . No Sidebar . Sidebar Bottom . Sidebar Right . ... Title: Side-view of the temperatures in a simulation of a white dwarf . ... NOTE: All images are copyright and must not be reproduced or mirrored in any form without written permission. ... Side-view of the temperatures in a simulation of a white dwarf €йRegner Trampedach . ...

When little Snow White looked round for the servant and could not see him, she got frightened. ... At last she saw a little house in the forest. ... They were seven little dwarfs. ... When they walked into the room and lit seven little lamps, they saw Snow White in one of the beds. ... In the morning, when Snow White woke up, she saw seven little dwarfs standing near her. ... When the dwarfs went to work in the mountains to look for gold, Snow White washed their clothes, cleaned the rooms and cooked. ...

... 2000 July 30 . NGC 2440: Cocoon of a New White Dwarf . Credit: H. Bond ( STScI ), R. Ciardullo ( PSU ), WFPC2 , HST , NASA . Explanation: Like a butterfly , a white dwarf star begins its life by casting off a cocoon that enclosed its former self. ... The above cocoon, the planetary nebula designated NGC 2440, contains one of the hottest white dwarf stars known . The white dwarf can be seen as the bright dot near the photo's center. ... About APOD | ... NASA Technical Rep.: ...

astro-ph/0612697 Газовый металлический диск вокруг белого карлика (A gaseous metal disk around a white dwarf) . ... Authors: Andrea Tiengo, Sandro Mereghetti . astro-ph/0612408 SN 2006gy: чрезвычайно мощная сверхновая в галактике раннего типа NGC 1260 (SN 2006gy: An extremely luminous supernova in the early-type galaxy NGC 1260) . ... Authors: S.P. Littlefair et al. astro-ph/0612012 Pismis 24-1: Верхний предел на звездную массу устоял (Pismis 24-1: The Stellar Upper Mass Limit Preserved) . ...