[permalink] [id link]
The light echoes of supernova 1987A are also geometric measurements, without any stellar models or assumptions.
from
Wikipedia
Some Related Sentences
light and echoes
In 2011, light echoes from the 19th century Great Eruption of η Carinae were detected using the U. S. National Optical Astronomy Observatory's Blanco 4-meter telescope at the Cerro Tololo Inter-American Observatory.
* In the scene where Christiane leaves the apartment for the first time after her coma, the way the elevator door opens and light shines from it into the dark corridor echoes Alan Parker's Angel Heart.
The work dates from the middle of the 15th century and is of considerable value for the light it throws on medieval manners, and for its echoes of folklore, sometimes deeply buried under layers of Christianity.
His technique and imagination in depicting the shimmering play of light on the waves and seafoam is especially admired, and gives his seascapes a romantic yet realistic quality that echoes the work of English watercolorist J. M. W. Turner and Russian painter Sylvester Shchedrin.
As the song fades, the line " while you're at it, leave the night-lite on inside the birdhouse in your soul " echoes the chorus, essentially telling the listener to keep all the good things that provide light in their soul protected.
An alternative explanation for the light curves of GRB 970228 and GRB 980326 involved dust echoes.
light and supernova
In April 2003, the Supernova Legacy Survey observed a type Ia supernova, designated SNLS-03D3bb, in a galaxy approximately 4 billion light years away.
The Crab Nebula, the shattered remnants of a star which exploded as a supernova, the light of which reached Earth in 1054 AD
The expanding supernova remnant around Supernova 1987A and its interaction with its surroundings, seen in X-ray and visible light.
The light from the new supernova reached Earth on February 23, 1987.
* 75 Ym — redshift 0. 95 — 8 gigalight-years — Approximate distance to the supernova SN 2002dd in the Hubble Deep Field North ( light travel distance )
In either case, the resulting supernova explosion expels much or all of the stellar material with velocities as much as 10 % the speed of light, that is, about 30, 000 km / s.
While most astronomical transient sources have simple and consistent time structures ( typically a rapid brightening followed by gradual fading, as in a nova or supernova ), the light curves of gamma-ray bursts are extremely diverse and complex.
Light curves can be periodic, as in the case of eclipsing binaries, Cepheid variables, other periodic variables, and transiting extrasolar planets, or aperiodic, like the light curve of a nova, a cataclysmic variable star, a supernova or a microlensing event.
In some respects Look to Windward serves as a loose sequel to the first Culture novel, Consider Phlebas: the GSV Lasting Damage fought in the Idiran-Culture War, and Ziller specially composes a work to commemorate the arrival of light from a supernova triggered during the war.
In a few years, Eta Carinae produced almost as much visible light as a supernova explosion, but it survived.
Analysis of the reflected spectra indicated the light was emitted when η Carinae was a 5000 K G2-to-G5 supergiant, some 2000 K cooler than other supernova imposter events.
This supernova event was observed in a galaxy about 240 million light years ( 72 million parsecs ) from Earth.
* The first light image, of supernova remnant Cassiopeia A, gave astronomers their first glimpse of the compact object at the center of the remnant, probably a neutron star or black hole.
In early 2007, scientists using the Spitzer discovered evidence that potentially indicates that the Pillars were destroyed by a nearby supernova explosion about 6, 000 years ago, but the light showing the new shape of the nebula will not reach Earth for another millennium.
Shklovsky proposed that cosmic rays from supernova explosions within 300 light years of the sun could have been responsible for some of the mass extinctions of life on earth.
If 1070 CE is accurate as the construction year, building the mound could theoretically have been influenced by two astronomical events: the light from the supernova that created the Crab Nebula in 1054, and the appearance of Halley's Comet in 1066.
The supernova light would have been visible for two weeks after it first reached earth, even during the day.
Ben E. K. Sugerman found a " light echo "-a reflection of supernova explosion that appeared after the explosion itself-associated with SN 2003gd.
By 2004, robotic observations accounted for an overwhelming percentage of the published scientific information on asteroid orbits and discoveries, variable star studies, supernova light curves and discoveries, comet orbits and gravitational microlensing observations.
In 1998, the light from a supernova in NGC 3982 ( later called SN 1998aq ) reached earth and was discovered by British amateur astronomer Mark Armstrong.
The model includes an expansion of metric space that is well documented both as the red shift of prominent spectral absorption or emission lines in the light from distant galaxies and as the time dilation in the light decay of supernova luminosity curves.
A supernova remnant ( SNR ) results from the gigantic explosion of a star, the resulting supernova expelling much or all of the stellar material with velocities as much as 1 % the speed of light and forming a shock wave that can heat the gas up to temperatures as high as 10 million K, forming a plasma.
light and 1987A
From the near-simultaneous observations of neutrinos and photons from SN 1987A, we know that the Shapiro delay for high-energy neutrinos is the same as that for photons to within 10 % ( consistent with recent estimates of the neutrino mass which imply that those neutrinos were moving at very close to the speed of light ).
light and are
His light blue eyes, set deep within the face, are actively and continually looking.
Women themselves have come to look upon matters in the same light as the outside world, and scarcely find any wrong in submitting to the importunities of a stronger will, even when their affections are withheld.
There are many soft and light shoe leathers available.
These cases in which light is already visible at the other end of the tunnel are ones which over the next few years will absorb the bulk of our capital assistance.
Those that are available shed little light.
This tied in closely with the current attempt to upgrade state-owned cars to the extent that vehicles are not retained beyond the point where maintenance costs ( in light of depreciation ) become excessive.
Among the most likely producers of detectable radio line spectra are the light diatomic hydrides OH and CH ; ;
But Schnabel was a great teacher in addition to being a great performer, and the fact that four of the ten versions I listened to are by Schnabel pupils ( Clifford Curzon, Frank Glazer, Adrian Aeschbacher, and Victor Babin ) also sheds light on the master's pedagogical skills.
It is a simple task to haul a boat fifty or one hundred miles to a lake or reservoir on the new, light, strong, easy-to-operate trailers which are built to accommodate almost any kind of small boat and retail from $100 to $2,000.
Many cells, bacteria, and other microorganisms are transparent to visible light and must be stained for microscopic investigation.
The video signal is amplified and then switched, in synchronism with the three ultraviolet light sources which are sequenced by the rotating mirror so that during one-twentieth of a second only one wavelength, corresponding to red, green, or blue, is seen.
( Note: Because of light leakage from one ultraviolet source to another, the lights are switched by a commutator-like assembly rotated by a synchronous motor.
Many of the cells and microorganisms which are transparent to visible light, absorb or reflect the much shorter wavelengths of the ultraviolet spectrum.
Also, the light sources are shielded from dirt and weather exposure and cannot obstruct the view of the sign.
The rate of the gas phase exchange reaction appears to be proportional to the first power of the absorbed light intensity indicating that the radical intermediates are removed at the walls or by reaction with an impurity rather than by bimolecular radical combination reactions.
Data on such comparisons together with data on the effect of light intensity are given in Table 1.
Geometric pottery has not yet received the thorough, detailed study which it deserves, partly because the task is a mammoth one and partly because some of its local manifestations, as at Argos, are only now coming to light.
To light industry, the economies of being on one floor are much slighter, but efficiency engineers usually believe in them, and manufacturers looking for ways to cut costs cannot be prevented from turning to efficiency engineers.
And wherever the new thruways go up their banks are lined by neat glass and metal and colored brick light industry.
The input light distributions considered are P-11 and P-20 phosphor emission and the so-called `` night light '' ( N.L. ) as given by H.W. Babcock and J. J. Johnson.
In the parapsychology foundation's long-range experiment, readings are made by a variety of sensitives for a large number of cooperating sitters, trying to throw light on this question of the significance of mediumistic statements.
In Psalm 27: 1 you read those beautiful words which you must have in your heart if you are to master the fears that surround you, or to drive them out if they have you in their grip: `` The Lord is my light and my salvation ; ;
He regulated the dualities of light and darkness, Yang and Yin, which are locked in eternal struggle.
Focused in a positive light, Anthropology is one of the few places where humanities, social, and natural sciences are forced to confront one another.
0.193 seconds.