Ch 11a (Measuring Stars 10-28-10)
... IV. Stellar sizes (radius) Luminosity is proportional to surface area (how large) x temperature (how hot): L= 4R2T4 If we can measure the Luminosity and the temperature of a star we can tell how large its ...
... IV. Stellar sizes (radius) Luminosity is proportional to surface area (how large) x temperature (how hot): L= 4R2T4 If we can measure the Luminosity and the temperature of a star we can tell how large its ...
SPACETIME SINGULARITIES: The STORY of BLACK HOLES
... before an explosive rebound takes place, and the explosion is not all that symmetric. In section C.2(a) below we will take a more extended look at what supernovae and their remnants look like, to see this. However, it can be shown that if the initial collapsing material does not have a net angular m ...
... before an explosive rebound takes place, and the explosion is not all that symmetric. In section C.2(a) below we will take a more extended look at what supernovae and their remnants look like, to see this. However, it can be shown that if the initial collapsing material does not have a net angular m ...
Gone in a flash: supernovae in the survey era
... order to find significant numextreme supernova that have emerged over the the reach of our current best tool, past five years (for a review, see Gal-Yam 2012), SNe Ia. bers. But with very large imagers on reaching absolute magnitudes of –23 (50 times To date there are three identified classes 4 m-cl ...
... order to find significant numextreme supernova that have emerged over the the reach of our current best tool, past five years (for a review, see Gal-Yam 2012), SNe Ia. bers. But with very large imagers on reaching absolute magnitudes of –23 (50 times To date there are three identified classes 4 m-cl ...
Journey through the cosmos
... Our galaxy, the Milky Way The galaxy in which we live is commonly known as the Milky Way. It is called the Milky Way because it looks like a giant splash or river of milk across a dark sky. But you probably haven’t seen it look like this, unless you live somewhere a long way away from a town. Until ...
... Our galaxy, the Milky Way The galaxy in which we live is commonly known as the Milky Way. It is called the Milky Way because it looks like a giant splash or river of milk across a dark sky. But you probably haven’t seen it look like this, unless you live somewhere a long way away from a town. Until ...
The Milky Way and other Galaxies
... Infer mass in the very center Central black holes! Several million, up to more than a billion solar masses! Supermassive black holes ...
... Infer mass in the very center Central black holes! Several million, up to more than a billion solar masses! Supermassive black holes ...
Satellities - stoweschools.com
... Velocity of the Geostationary Satellite with respect to the sun ...
... Velocity of the Geostationary Satellite with respect to the sun ...
Chapter 8 Formation of Stars
... this image is about one light year. The Herbig–Haro objects are designated HH-1 and HH-2, and correspond to the nebulosity at the ends of the jets. In the bottom image, a complex jet about a half light year long emerges from a star hidden in a dust cloud near the left edge of the image. The twisted ...
... this image is about one light year. The Herbig–Haro objects are designated HH-1 and HH-2, and correspond to the nebulosity at the ends of the jets. In the bottom image, a complex jet about a half light year long emerges from a star hidden in a dust cloud near the left edge of the image. The twisted ...
Folie 1
... This does not have to be at regular intervals or specific filters/wavelengths. EVERY image is helpful! Young clusters are ideal as there are many YSOs in each field of view and we know their age. Can easily spot onset of eruption for detailed ...
... This does not have to be at regular intervals or specific filters/wavelengths. EVERY image is helpful! Young clusters are ideal as there are many YSOs in each field of view and we know their age. Can easily spot onset of eruption for detailed ...
Chapter 7 Formation of Stars
... this image is about one light year. The Herbig–Haro objects are designated HH-1 and HH-2, and correspond to the nebulosity at the ends of the jets. In the bottom image, a complex jet about a half light year long emerges from a star hidden in a dust cloud near the left edge of the image. The twisted ...
... this image is about one light year. The Herbig–Haro objects are designated HH-1 and HH-2, and correspond to the nebulosity at the ends of the jets. In the bottom image, a complex jet about a half light year long emerges from a star hidden in a dust cloud near the left edge of the image. The twisted ...
Chapter 15: The Milky Way Galaxy
... How many stars does the Milky Way Galaxy contain? The Milky Way has about 200 billion stars. Where is our solar system located in the Milky Way Galaxy? The solar system is between the Sagittarius and Perseus spiral arms about 26,000 ly from the center of the Galaxy. Is the Sun moving through the Mil ...
... How many stars does the Milky Way Galaxy contain? The Milky Way has about 200 billion stars. Where is our solar system located in the Milky Way Galaxy? The solar system is between the Sagittarius and Perseus spiral arms about 26,000 ly from the center of the Galaxy. Is the Sun moving through the Mil ...
Cygnus X-2, super-Eddington mass transfer, and pulsar binaries
... and larger qi to pulsar binaries with shorter periods and relatively massive white dwarf companions. The latter naturally explain the surprisingly large companion masses in several millisecond pulsar binaries. Systems like Cygnus X-2 may thus be an important channel for forming pulsar binaries. Key ...
... and larger qi to pulsar binaries with shorter periods and relatively massive white dwarf companions. The latter naturally explain the surprisingly large companion masses in several millisecond pulsar binaries. Systems like Cygnus X-2 may thus be an important channel for forming pulsar binaries. Key ...
mufon ufo symposium -1974
... sequence stars in the best range for life in a 10 parsec radius of Earth were probably variable, although I could find no reason why the percentage is so high. The ratio dropped to 1/20 in the 10 to 20 parsec range, so we probably are not catching the variability in these stars. If the star is varia ...
... sequence stars in the best range for life in a 10 parsec radius of Earth were probably variable, although I could find no reason why the percentage is so high. The ratio dropped to 1/20 in the 10 to 20 parsec range, so we probably are not catching the variability in these stars. If the star is varia ...
Star Sizes - Fort Lewis College
... • Earth-based measurements can typically be made to 0.03”, or to a distance of ~30 parsecs (pc) • Distances to several thousand stars are known this way. • The Hipparcos satellite extends the distance to ~200 pc, so distances to nearly one million stars can be measured with parallax. ...
... • Earth-based measurements can typically be made to 0.03”, or to a distance of ~30 parsecs (pc) • Distances to several thousand stars are known this way. • The Hipparcos satellite extends the distance to ~200 pc, so distances to nearly one million stars can be measured with parallax. ...
Main-Sequence Stars and the Sun
... and as a rule the energy steps decrease very rapidly for higher excitations. For example, in the hydrogen atom, the transition from ground state to 1st excited level requires an ultraviolet (UV) photon, from the 1st to 2nd a visible photon, and from 2nd to 3rd an infrared (IR) photon. In our classifi ...
... and as a rule the energy steps decrease very rapidly for higher excitations. For example, in the hydrogen atom, the transition from ground state to 1st excited level requires an ultraviolet (UV) photon, from the 1st to 2nd a visible photon, and from 2nd to 3rd an infrared (IR) photon. In our classifi ...
1: Properties of Pulsars
... from the central "strange" star, identifying it as a pulsar. It turned out later, that these "giant pulses" which they observed, occur every two minutes or so, and that the true pulse period was in fact as short as 33 milliseconds. The short period of 33 milliseconds ruled out white dwarfs for being ...
... from the central "strange" star, identifying it as a pulsar. It turned out later, that these "giant pulses" which they observed, occur every two minutes or so, and that the true pulse period was in fact as short as 33 milliseconds. The short period of 33 milliseconds ruled out white dwarfs for being ...
Stellar Physics 1
... A. The track that a star takes as it moves up the main sequence. B. The track that a star takes as it moves down the main sequence. C. The track that a star takes as it moves off the main sequence. y D. The track that a star takes as it moves onto the main sequence. ...
... A. The track that a star takes as it moves up the main sequence. B. The track that a star takes as it moves down the main sequence. C. The track that a star takes as it moves off the main sequence. y D. The track that a star takes as it moves onto the main sequence. ...
ppt file - Universitat de Barcelona
... Why do stars preferently form closely packed rather than in isolation? Nobody knows (up to now) the answer, but we can gain insight by: ...
... Why do stars preferently form closely packed rather than in isolation? Nobody knows (up to now) the answer, but we can gain insight by: ...
Small galaxies are growing smaller
... have the spectacular appearance we see in “coffee table” books. Indeed, in the early days of extragalactic astronomy it was thought that most galaxies were of rather similar (large) luminosities. Specifically, Edwin Hubble (1936) and his contemporaries believed that the luminosity function (LF) of g ...
... have the spectacular appearance we see in “coffee table” books. Indeed, in the early days of extragalactic astronomy it was thought that most galaxies were of rather similar (large) luminosities. Specifically, Edwin Hubble (1936) and his contemporaries believed that the luminosity function (LF) of g ...
Low-Res Version - Chandra X
... human eye and brain perceive different wavelengths of light in the visible part of the electromagnetic spectrum. X-rays, and other wavelengths such as radio, infra-red, ultra-violet and gamma, cannot be seen with the human eye, and thus do not have any "color". To see the invisible wavelengths, we n ...
... human eye and brain perceive different wavelengths of light in the visible part of the electromagnetic spectrum. X-rays, and other wavelengths such as radio, infra-red, ultra-violet and gamma, cannot be seen with the human eye, and thus do not have any "color". To see the invisible wavelengths, we n ...
18_Testbank - Lick Observatory
... A) The entire mass of Earth would end up as a thin layer, about 1 cm thick, over the surface of the neutron star. B) It would rapidly sink to the center of Earth. C) The combined mass of Earth and the neutron star would cause the neutron star to collapse into a black hole. D) It would crash through ...
... A) The entire mass of Earth would end up as a thin layer, about 1 cm thick, over the surface of the neutron star. B) It would rapidly sink to the center of Earth. C) The combined mass of Earth and the neutron star would cause the neutron star to collapse into a black hole. D) It would crash through ...
The High Resolution Camera CXC Newsletter
... or outbursting (with subclasses short vs. long outbursts and activity periods). 129 sources could be classified as X-ray binaries due to their position in globular clusters or their strong time variability (see Fig. 2). We detected seven supernova remnants, one of which is a new candidate, and also ...
... or outbursting (with subclasses short vs. long outbursts and activity periods). 129 sources could be classified as X-ray binaries due to their position in globular clusters or their strong time variability (see Fig. 2). We detected seven supernova remnants, one of which is a new candidate, and also ...
Cygnus (constellation)
Cygnus /ˈsɪɡnəs/ is a northern constellation lying on the plane of the Milky Way, deriving its name from the Latinized Greek word for swan. The swan is one of the most recognizable constellations of the northern summer and autumn, it features a prominent asterism known as the Northern Cross (in contrast to the Southern Cross). Cygnus was among the 48 constellations listed by the 2nd century astronomer Ptolemy, and it remains one of the 88 modern constellations.Cygnus contains Deneb, one of the brightest stars in the night sky and one corner of the Summer Triangle, as well as some notable X-ray sources and the giant stellar association of Cygnus OB2. One of the stars of this association, NML Cygni, is one of the largest stars currently known. The constellation is also home to Cygnus X-1, a distant X-ray binary containing a supergiant and unseen massive companion that was the first object widely held to be a black hole. Many star systems in Cygnus have known planets as a result of the Kepler Mission observing one patch of the sky, the patch is the area around Cygnus. In addition, most of the eastern part of Cygnus is dominated by the Hercules–Corona Borealis Great Wall, a giant galaxy filament that is the largest known structure in the observable universe; covering most of the northern sky.