Word doc - UC-HiPACC - University of California, Santa Cruz
... Separated at Birth: Finding our Sun’s Long-Lost Siblings? Stars are born in groups or clusters when a cold giant molecular cloud collapses under its own gravitational force. If many stars form all at once—that is, if star formation efficiency is high—they will stay together as a gravitationally boun ...
... Separated at Birth: Finding our Sun’s Long-Lost Siblings? Stars are born in groups or clusters when a cold giant molecular cloud collapses under its own gravitational force. If many stars form all at once—that is, if star formation efficiency is high—they will stay together as a gravitationally boun ...
RR animation
... RR Lyraes are pulsating horizontal branch stars of spectral class A (and rarely F), with a mass of around half the Sun's. They are thought to have previously shed mass and consequently, they were once stars with similar or slightly less mass than the Sun, around 0.8 solar masses. RR Lyrae stars puls ...
... RR Lyraes are pulsating horizontal branch stars of spectral class A (and rarely F), with a mass of around half the Sun's. They are thought to have previously shed mass and consequently, they were once stars with similar or slightly less mass than the Sun, around 0.8 solar masses. RR Lyrae stars puls ...
The Life of a Star - Department of Physics and Astronomy
... • When the central temperature of a red giant reaches about 100 million K, helium fusion begins in the core • This process, also called the triple alpha process, converts helium to carbon and oxygen ...
... • When the central temperature of a red giant reaches about 100 million K, helium fusion begins in the core • This process, also called the triple alpha process, converts helium to carbon and oxygen ...
Today`s Powerpoint
... When a cloud starts to collapse, it should fragment. Fragments then collapse on their own, fragmenting further. End product is 100’s or 1000’s of dense clumps each destined to form star, binary star, etc. Hence a cloud gives birth to a cluster of stars. ...
... When a cloud starts to collapse, it should fragment. Fragments then collapse on their own, fragmenting further. End product is 100’s or 1000’s of dense clumps each destined to form star, binary star, etc. Hence a cloud gives birth to a cluster of stars. ...
Unit 60 to 79
... b. Exceed its Chandrasekhar limit c. Have begun life as a high-mass star d. Continue the fusion cycle until its core is completely composed of iron 7) Which of the following events will not leave any remnant? a. Type I supernova b. Type II supernova c. Nova 8) The Sun will likely never become a nova ...
... b. Exceed its Chandrasekhar limit c. Have begun life as a high-mass star d. Continue the fusion cycle until its core is completely composed of iron 7) Which of the following events will not leave any remnant? a. Type I supernova b. Type II supernova c. Nova 8) The Sun will likely never become a nova ...
Summary of Double Star Discoveries and JDSO Submissions
... At 04:28:01.0 the magnitude 10.1 target star TYC 4677-00696-1 crisply faded but did NOT disappear. It remained at least as bright as magnitude 12.9 GSC 4677-806 located 1.7' northeast. This failure to dim the predicted 4.7 magnitudes completely surprised me and resulted in a very long reaction time ...
... At 04:28:01.0 the magnitude 10.1 target star TYC 4677-00696-1 crisply faded but did NOT disappear. It remained at least as bright as magnitude 12.9 GSC 4677-806 located 1.7' northeast. This failure to dim the predicted 4.7 magnitudes completely surprised me and resulted in a very long reaction time ...
Stars, Galaxies & Universe
... • Stars use up their hydrogen and expand their atmosphere. • Stars that are less than 1.4 solar masses will shrink to a white dwarf. • Stars between 1.4 -3.0 solar masses will produce a supernova and leave a neutron star. • Stars more than 3.0 solar masses will produce a supernova and collapse into ...
... • Stars use up their hydrogen and expand their atmosphere. • Stars that are less than 1.4 solar masses will shrink to a white dwarf. • Stars between 1.4 -3.0 solar masses will produce a supernova and leave a neutron star. • Stars more than 3.0 solar masses will produce a supernova and collapse into ...
Lecture 5: The H-R diagram, standard candles and cosmic distances
... • If the approximate luminosity of star can be determined from its spectral lines, coupled with position on the HR diagram, then comparing this with its apparent magnitude allows its distance to be estimated (see notes from Lecture 3). • This method of distance estimation is (unfortunately) referr ...
... • If the approximate luminosity of star can be determined from its spectral lines, coupled with position on the HR diagram, then comparing this with its apparent magnitude allows its distance to be estimated (see notes from Lecture 3). • This method of distance estimation is (unfortunately) referr ...
Lecture 12
... L = 4pR 2 ¥ sTe4 …which relates L, R and Te - so only three independent quantities to measure - mass plus two of luminosity, radius, and effective temperature. ...
... L = 4pR 2 ¥ sTe4 …which relates L, R and Te - so only three independent quantities to measure - mass plus two of luminosity, radius, and effective temperature. ...
File
... crust, about a kilometer thick. This crust is very hard and very smooth. Gravity would probably prevent any irregularities larger than half a centimeter. ...
... crust, about a kilometer thick. This crust is very hard and very smooth. Gravity would probably prevent any irregularities larger than half a centimeter. ...
Astronomical Toolkit
... scheme called apparent magnitudes. The modern definition of magnitudes was chosen so that the magnitude measurements already in use did not have to be changed. Astronomers use two different types of magnitudes: apparent magnitudes and absolute magnitudes. ...
... scheme called apparent magnitudes. The modern definition of magnitudes was chosen so that the magnitude measurements already in use did not have to be changed. Astronomers use two different types of magnitudes: apparent magnitudes and absolute magnitudes. ...
Lab 2: The Planisphere
... distortion, constellations in the sky will not appear as they do on the planisphere, but the planisphere can help us identify bright stars and give us a general idea of where to look for other stars. It's also very useful in figuring out when certain star will rise or set. The best way to get comfor ...
... distortion, constellations in the sky will not appear as they do on the planisphere, but the planisphere can help us identify bright stars and give us a general idea of where to look for other stars. It's also very useful in figuring out when certain star will rise or set. The best way to get comfor ...
I CAN SEE THE STARS IN YOUR EYES
... Your space craft begins to travel at the speed of light, taking you towards the sun. Traveling at this speed, the trip from Earth to the sun, a distance of 93 million miles, would take about 8 minutes, not very long for such a long trip! Yet, to get to the next closest star, Proxima Centauri, would ...
... Your space craft begins to travel at the speed of light, taking you towards the sun. Traveling at this speed, the trip from Earth to the sun, a distance of 93 million miles, would take about 8 minutes, not very long for such a long trip! Yet, to get to the next closest star, Proxima Centauri, would ...
mass_spetral
... When the stars are farther apart (a is increased) they move more slowly in their orbit. Measuring the time it takes for the spectral lines to return to their starting wavelength gives us the orbital ...
... When the stars are farther apart (a is increased) they move more slowly in their orbit. Measuring the time it takes for the spectral lines to return to their starting wavelength gives us the orbital ...
Astro 10 Practice Test 3
... b. The helium in their cores has all been used up, which means they’ve started buring hydrogen for the first time. c. They have been ejected from the cluster by gravitational encounters with other stars. d. They’ve run out of hydrogen to burn in their cores, and have evolved into red giants. ...
... b. The helium in their cores has all been used up, which means they’ve started buring hydrogen for the first time. c. They have been ejected from the cluster by gravitational encounters with other stars. d. They’ve run out of hydrogen to burn in their cores, and have evolved into red giants. ...
1. Stellar Evolution – Notes Astronomers classify stars according to
... cooler main sequence stars, are larger. Also, stars that have the same luminosity as dimmer main sequence stars, but are to the left of them (hotter) on the H-R diagram, are smaller. Bright, cool stars are therefore necessarily very large. Similarly, stars that are very hot and yet still dim must be ...
... cooler main sequence stars, are larger. Also, stars that have the same luminosity as dimmer main sequence stars, but are to the left of them (hotter) on the H-R diagram, are smaller. Bright, cool stars are therefore necessarily very large. Similarly, stars that are very hot and yet still dim must be ...
Auriga (constellation)
Auriga is one of the 48 constellations listed by the 2nd-century astronomer Ptolemy and remains one of the 88 modern constellations. Located north of the celestial equator, its name is the Latin word for ""charioteer"", associating it with various mythological charioteers, including Erichthonius and Myrtilus. Auriga is most prominent during winter evenings in the Northern Hemisphere, along with the five other constellations that have stars in the Winter Hexagon asterism. Because of its northern declination, Auriga is only visible in its entirety as far as 34° south; for observers farther south it lies partially or fully below the horizon. A large constellation, with an area of 657 square degrees, it is half the size of the largest constellation, Hydra.Its brightest star, Capella, is an unusual multiple star system among the brightest stars in the night sky. Beta Aurigae is an interesting variable star in the constellation; Epsilon Aurigae, a nearby eclipsing binary with an unusually long period, has been studied intensively. Because of its position near the winter Milky Way, Auriga has many bright open clusters in its borders, including M36, M37, and M38, popular targets for amateur astronomers. In addition, it has one prominent nebula, the Flaming Star Nebula, associated with the variable star AE Aurigae.In Chinese mythology, Auriga's stars were incorporated into several constellations, including the celestial emperors' chariots, made up of the modern constellation's brightest stars. Auriga is home to the radiant for the Aurigids, Zeta Aurigids, Delta Aurigids, and the hypothesized Iota Aurigids.