Goal: To understand clusters of stars
... old. • And the cluster is moving by us at 46 km/s. • 46 km/s = 1 light year per 6000 years ...
... old. • And the cluster is moving by us at 46 km/s. • 46 km/s = 1 light year per 6000 years ...
スライド 1 - STScI
... shows the 10 sigma detection limit for our monitoring survey at K band, which is about 15.5 magnitude. The right diagonal line stands for the 10 sigma detection limit of the OGLE survey at I band, which is about 19.5 magnitude. Also, the left diagonal line shows the saturation limit of the OGLE surv ...
... shows the 10 sigma detection limit for our monitoring survey at K band, which is about 15.5 magnitude. The right diagonal line stands for the 10 sigma detection limit of the OGLE survey at I band, which is about 19.5 magnitude. Also, the left diagonal line shows the saturation limit of the OGLE surv ...
Galaxies – Island universes
... • Many have later infalling matter which has been pulled on by nearby mass and thus doesn’t fall straight in. It settles into a rotating disk, arranging itself into a flat, roughly circularly orbiting plane of material • This material gradually condenses enough to initiate star formation. Then super ...
... • Many have later infalling matter which has been pulled on by nearby mass and thus doesn’t fall straight in. It settles into a rotating disk, arranging itself into a flat, roughly circularly orbiting plane of material • This material gradually condenses enough to initiate star formation. Then super ...
The Origin, Structure, and Evolution of the Stars
... diagram. Our calculations indicate that the more massive stars “burn” their fuel so rapidly they cannot last very long. Some of these bright stars must have been formed more recently than the earth, perhaps some even as recently as the appearance of early man. By the same arguments, there must have ...
... diagram. Our calculations indicate that the more massive stars “burn” their fuel so rapidly they cannot last very long. Some of these bright stars must have been formed more recently than the earth, perhaps some even as recently as the appearance of early man. By the same arguments, there must have ...
Galactic Evolution:
... typically assumed. There are models with quick pre-enrichment. This includes pre-galactic enrichment, or protogalactic processes, or preenrichment from other more evolved system. ...
... typically assumed. There are models with quick pre-enrichment. This includes pre-galactic enrichment, or protogalactic processes, or preenrichment from other more evolved system. ...
Chapter 12 Stellar Evolution
... • Carbon-detonation supernova: This white dwarf has accumulated too much mass from its binary companion. • If the white dwarf’s mass exceeds 1.4 solar masses, electron degeneracy can no longer keep the core from collapsing. • Carbon fusion begins throughout the star almost simultaneously, resulting ...
... • Carbon-detonation supernova: This white dwarf has accumulated too much mass from its binary companion. • If the white dwarf’s mass exceeds 1.4 solar masses, electron degeneracy can no longer keep the core from collapsing. • Carbon fusion begins throughout the star almost simultaneously, resulting ...
So, what`s the problem for high
... emission was made by physicists who built IR detectors and put them on telescopes. The first important far-ir source was the Galactic Center, discovered by a one-inch telescope on a high altitude balloon. It’s luminosity comes largely from formation of high-mass stars. The Infrared Astronomy Satelli ...
... emission was made by physicists who built IR detectors and put them on telescopes. The first important far-ir source was the Galactic Center, discovered by a one-inch telescope on a high altitude balloon. It’s luminosity comes largely from formation of high-mass stars. The Infrared Astronomy Satelli ...
Using photometric analysis to determine characteristics of the V
... The main purpose of the experiment as described above is to characterize the newly found nova V‐2491 in the Cygnus constellation as show in figure 2. In order to do so, frames of that particular nova need to be taken over several nights and then analyze as a collecti ...
... The main purpose of the experiment as described above is to characterize the newly found nova V‐2491 in the Cygnus constellation as show in figure 2. In order to do so, frames of that particular nova need to be taken over several nights and then analyze as a collecti ...
Binaries
... Gravitational Force = Centripetal Force Me = v2Rm/G Similarly we can calculate the Sun’s mass using Earth’s orbit. We need at least two object rotating around each other to calculate the mass of them. ...
... Gravitational Force = Centripetal Force Me = v2Rm/G Similarly we can calculate the Sun’s mass using Earth’s orbit. We need at least two object rotating around each other to calculate the mass of them. ...
No Slide Title
... a) white dwarf, red giant, main sequence, protostar b) red giant, main-sequence, white dwarf, protostar c) protostar, red giant, main sequence, white dwarf d) protostar, main sequence, white dwarf, red giant e) protostar, main sequence, red giant, white dwarf ...
... a) white dwarf, red giant, main sequence, protostar b) red giant, main-sequence, white dwarf, protostar c) protostar, red giant, main sequence, white dwarf d) protostar, main sequence, white dwarf, red giant e) protostar, main sequence, red giant, white dwarf ...
Constituents of the Milky Way
... Measuring Ages of Individual Stars For individual stars that aren’t in clusters (like the Sun), we can’t use the cluster turnoff method to measure an age. For instance, a lone G star might be young, or it might be 10 billion years old. How do we measure its age? The universe contained only hydrogen ...
... Measuring Ages of Individual Stars For individual stars that aren’t in clusters (like the Sun), we can’t use the cluster turnoff method to measure an age. For instance, a lone G star might be young, or it might be 10 billion years old. How do we measure its age? The universe contained only hydrogen ...
13.5 The HR Diagram By the early 1900s, astronomers had learned
... therefore red (recall that color is related to temperature), these huge cool stars are called red giants. For example, the bright star Aldebaran in the constellation Taurus is a red giant. Its temperature is about 4000 kelvin and its radius is about 30 times larger than the Sun's. Page 351 A similar ...
... therefore red (recall that color is related to temperature), these huge cool stars are called red giants. For example, the bright star Aldebaran in the constellation Taurus is a red giant. Its temperature is about 4000 kelvin and its radius is about 30 times larger than the Sun's. Page 351 A similar ...
6 March 2013 Exoplanets and Where to Find Them Professor
... The Galaxy is continually evolving and changing, albeit on the astronomical timescale of millions of years. Within the disc, the spiral arms show where diffuse hydrogen gas clouds have been compressed by density waves, triggering the process of gravitational collapse that leads to the formation of s ...
... The Galaxy is continually evolving and changing, albeit on the astronomical timescale of millions of years. Within the disc, the spiral arms show where diffuse hydrogen gas clouds have been compressed by density waves, triggering the process of gravitational collapse that leads to the formation of s ...
ASTR-264-Lecture
... 1. earth could not be moving because ovjects in air would be left behind 2. non-circular orbits are not “perfect” as heavens should be 3. if Earth were really orbiting sun, we’d detect stellar parallax Oercoming the 1st objection (nature of motion) Galileo’s experiments showed that o bjects in air w ...
... 1. earth could not be moving because ovjects in air would be left behind 2. non-circular orbits are not “perfect” as heavens should be 3. if Earth were really orbiting sun, we’d detect stellar parallax Oercoming the 1st objection (nature of motion) Galileo’s experiments showed that o bjects in air w ...
Educational Brief
... more massive than the Sun or from a strange kind of star, called a white dwarf, that accumulates matter from a companion until it explodes. In 1054 A.D., Chinese astronomers recorded a ‘guest star’ that appeared in the constellation of Taurus for several days. For a short while this star shined as b ...
... more massive than the Sun or from a strange kind of star, called a white dwarf, that accumulates matter from a companion until it explodes. In 1054 A.D., Chinese astronomers recorded a ‘guest star’ that appeared in the constellation of Taurus for several days. For a short while this star shined as b ...
MAIN SEQUENCE STARS, Red Giants and White Dwarfs
... • A star leaves the MS when it exhausts H at the core. During the MS, there is an excellent balance between P and gravity: HYDROSTATIC EQUILIBRIUM • When H is gone, the core is essentially all He and (at between 6 and 40 million K), far too cool to start nuclear fusion of He. • The structure must re ...
... • A star leaves the MS when it exhausts H at the core. During the MS, there is an excellent balance between P and gravity: HYDROSTATIC EQUILIBRIUM • When H is gone, the core is essentially all He and (at between 6 and 40 million K), far too cool to start nuclear fusion of He. • The structure must re ...
Exoplanet Discoveries and the Fermi Paradox
... The Sun is in the Milky Way galaxy, a barred spiral about 100,000 light years across the spiral arms, containing about 200 billion solar masses. The Milky Way is brighter and has higher metallicity (presence of elements heavier than hydrogen and helium) than 98% of all galaxies10. The presence of he ...
... The Sun is in the Milky Way galaxy, a barred spiral about 100,000 light years across the spiral arms, containing about 200 billion solar masses. The Milky Way is brighter and has higher metallicity (presence of elements heavier than hydrogen and helium) than 98% of all galaxies10. The presence of he ...
Stellar Lives (continued). Galaxies.
... Globular clusters are typically old objects (12-16 billion years), the oldest objects in the galaxy. They place a limit on the possible age of the Universe. ...
... Globular clusters are typically old objects (12-16 billion years), the oldest objects in the galaxy. They place a limit on the possible age of the Universe. ...
The Evolution of Stars - a More Detailed Picture (Chapter 8
... luminosity (Fig. 1). These are called Hayashi-tracks. In time, as the internal temperature continues to rise, ionisation is completed and the opacity drops. The convective zone recedes from the centre, and the star moves to higher effective temperatures. Slowly nuclear burning starts in the core. As ...
... luminosity (Fig. 1). These are called Hayashi-tracks. In time, as the internal temperature continues to rise, ionisation is completed and the opacity drops. The convective zone recedes from the centre, and the star moves to higher effective temperatures. Slowly nuclear burning starts in the core. As ...
Stars: Their Life and Afterlife
... would have enough energy to bind with protons and form neutrons and neutron-rich nuclei. The loss of free electrons means a lower pressure, and again the star is forced by gravity to contract in response. The story is quite different, however, for white dwarfs in close binary systems. If a white dwa ...
... would have enough energy to bind with protons and form neutrons and neutron-rich nuclei. The loss of free electrons means a lower pressure, and again the star is forced by gravity to contract in response. The story is quite different, however, for white dwarfs in close binary systems. If a white dwa ...
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.