00
... The effect is seen only when the smaller star eclipses the larger because the higher temperature exists on the inner faces. Since both the effect of ellipticity and the reflection effect result from the closeness of two stars it is difficult to separate one effect from the other. The proximity gives ...
... The effect is seen only when the smaller star eclipses the larger because the higher temperature exists on the inner faces. Since both the effect of ellipticity and the reflection effect result from the closeness of two stars it is difficult to separate one effect from the other. The proximity gives ...
Powerpoint for today
... pressure can stop it (total mass of star about 25 MSun). Core collapses to a point, a "singularity". Gravity is so strong that nothing can escape, not even light => black hole. Schwarzschild radius for Earth is 1 cm. For a 3 MSun object, it’s 9 km. ...
... pressure can stop it (total mass of star about 25 MSun). Core collapses to a point, a "singularity". Gravity is so strong that nothing can escape, not even light => black hole. Schwarzschild radius for Earth is 1 cm. For a 3 MSun object, it’s 9 km. ...
The Edge of the Solar System The Oort Cloud
... Pushed out by large molecular clouds, passing stars, or tidal interactions with Milky Way's disc o 5 of these enter inner solar system per year o It takes thousands of years for them to orbit the sun ...
... Pushed out by large molecular clouds, passing stars, or tidal interactions with Milky Way's disc o 5 of these enter inner solar system per year o It takes thousands of years for them to orbit the sun ...
The Oort Cloud
... Pushed out by large molecular clouds, passing stars, or tidal interactions with Milky Way's disc 5 of these enter inner solar system per year It takes thousands of years for them to orbit the sun ...
... Pushed out by large molecular clouds, passing stars, or tidal interactions with Milky Way's disc 5 of these enter inner solar system per year It takes thousands of years for them to orbit the sun ...
The Relative Ages of M5 and Pal 4/Eridanus from their
... of 2 smaller than their rotation velocity. This implies that the LMC is kinematically cold, and must therefore be a disk system. ...
... of 2 smaller than their rotation velocity. This implies that the LMC is kinematically cold, and must therefore be a disk system. ...
ppt
... • From there we can calculate how much further away the star must be than the Sun to make it the brightness we see from Earth • Delta Cephei shows has a period of about 5 days • This is a reasonably bright star in the constellation of Cepheus • Cepheids are in other galaxies also, and used similarly ...
... • From there we can calculate how much further away the star must be than the Sun to make it the brightness we see from Earth • Delta Cephei shows has a period of about 5 days • This is a reasonably bright star in the constellation of Cepheus • Cepheids are in other galaxies also, and used similarly ...
Lecture Nine (Powerpoint format) - FLASH Center for Computational
... The evolution of massive stars (> 8 times mass sun) is similar to that of lower-mass stars through the beginning stages, except far more rapid due to its greater mass burning rate. Where a 1 solar mass star spends 10 billion years reaching the red giant stage, a 10 solar mass star may reach the ...
... The evolution of massive stars (> 8 times mass sun) is similar to that of lower-mass stars through the beginning stages, except far more rapid due to its greater mass burning rate. Where a 1 solar mass star spends 10 billion years reaching the red giant stage, a 10 solar mass star may reach the ...
BA Training – XRT software
... which expand and therefore cool, energy generation drops, core contracts…cycle repeats Thermal pulses (every few thousand years) cause luminosity to vary by up to 50% on timescales of a few years. Energy transported rapidly to surface by convection Star develops super wind removing outer layers, exp ...
... which expand and therefore cool, energy generation drops, core contracts…cycle repeats Thermal pulses (every few thousand years) cause luminosity to vary by up to 50% on timescales of a few years. Energy transported rapidly to surface by convection Star develops super wind removing outer layers, exp ...
Mass Segregation in Globular Clusters
... One feature that characterizes such a cluster is that all its members should have approximately the same kinetic energy. For less massive stars, this means that on average, their velocities should be higher by a specific and measurable amount. ...
... One feature that characterizes such a cluster is that all its members should have approximately the same kinetic energy. For less massive stars, this means that on average, their velocities should be higher by a specific and measurable amount. ...
IS AN ALTERNATE COSMOLOGY BECOMING NECESSARY?
... very high percentage of dark matter, aka cool stars. The current popular model gives insufficient time for stars to become cool, thus the only possible explanation for dark matter is the likelihood of certain particles filling the universe. These elusive particles will never be found if they ...
... very high percentage of dark matter, aka cool stars. The current popular model gives insufficient time for stars to become cool, thus the only possible explanation for dark matter is the likelihood of certain particles filling the universe. These elusive particles will never be found if they ...
10 relativity, black holes_
... Red giant shrinks, becomes very hot Expands to become a red giant again ...
... Red giant shrinks, becomes very hot Expands to become a red giant again ...
The resolved stellar populations of M32 Monachesi, Antonela
... outer space through its stellar atmosphere. This radiation provides detailed information about the intrinsic properties of the emitting star. Stars are then classified according to the wavelength at which the radiation peaks, which also indicates their surface temperatures. On the other side, the ma ...
... outer space through its stellar atmosphere. This radiation provides detailed information about the intrinsic properties of the emitting star. Stars are then classified according to the wavelength at which the radiation peaks, which also indicates their surface temperatures. On the other side, the ma ...
Dark Matter Capture in the first stars
... Lifetime of Dark Star • SCENARIO A: The DM initially inside the star is eaten up in about a million years. • SCENARIO B: The DS lives as long as it captures more Dark Matter fuel: millions to billions of years if further DM is captured by the star. • The refueling can only persist as long as the DS ...
... Lifetime of Dark Star • SCENARIO A: The DM initially inside the star is eaten up in about a million years. • SCENARIO B: The DS lives as long as it captures more Dark Matter fuel: millions to billions of years if further DM is captured by the star. • The refueling can only persist as long as the DS ...
3.6 spectral classes
... The method of parallax is used in measuring the distances to nearby stars. The position of a star is carefully determined relative to other stars. Six months later, when Earth’s revolution has carried telescopes halfway around the Sun, the star’s position is measured again. Nearby stars appear to sh ...
... The method of parallax is used in measuring the distances to nearby stars. The position of a star is carefully determined relative to other stars. Six months later, when Earth’s revolution has carried telescopes halfway around the Sun, the star’s position is measured again. Nearby stars appear to sh ...
Star
... Center of the Milky Way? A. By observing it in (very energetic) x-rays B. By observing it in ultraviolet light C. By observing it in visible light D. By observing it in infrared light E. By observing it in radio light Choose all that apply ...
... Center of the Milky Way? A. By observing it in (very energetic) x-rays B. By observing it in ultraviolet light C. By observing it in visible light D. By observing it in infrared light E. By observing it in radio light Choose all that apply ...
Astronomy news
... A 70ks long observation of RX J1856 was carried out with XMM staring on 2006 Oct. 24 at 00:30 UT. After data reduction, the event files result in net exposure times of 47 and 68 ks for the pn and MOS. Due to the very soft spectrum of RX J1856, they started timing analysis using the data of pn camera ...
... A 70ks long observation of RX J1856 was carried out with XMM staring on 2006 Oct. 24 at 00:30 UT. After data reduction, the event files result in net exposure times of 47 and 68 ks for the pn and MOS. Due to the very soft spectrum of RX J1856, they started timing analysis using the data of pn camera ...
The Milky Way Galaxy is on a Collision course with Andromeda
... The collision will cause huge tides of stars that toss them thousands of light years in every direction! Those are called tidal tails. When they are thrown our solar system is thrown as well! Currently we are on the Sagittarius arm. But we will be thrown somewhere we don’t know. There is a possibili ...
... The collision will cause huge tides of stars that toss them thousands of light years in every direction! Those are called tidal tails. When they are thrown our solar system is thrown as well! Currently we are on the Sagittarius arm. But we will be thrown somewhere we don’t know. There is a possibili ...
Star Clusters and their stars
... clusters orbiting our Galaxy. They typically have 105 – 106 stars. They are spherically distributed around the center of our Galaxy. They tend to concentrate towards the center of the Galaxy, with many in the constellations Sagittarius, Scorpio and Ophiunchus It was by studying the distribution of g ...
... clusters orbiting our Galaxy. They typically have 105 – 106 stars. They are spherically distributed around the center of our Galaxy. They tend to concentrate towards the center of the Galaxy, with many in the constellations Sagittarius, Scorpio and Ophiunchus It was by studying the distribution of g ...
Star_Clusters
... clusters orbiting our Galaxy. They typically have 105 – 106 stars. They are spherically distributed around the center of our Galaxy. They tend to concentrate towards the center of the Galaxy, with many in the constellations Sagittarius, Scorpio and Ophiunchus It was by studying the distribution of g ...
... clusters orbiting our Galaxy. They typically have 105 – 106 stars. They are spherically distributed around the center of our Galaxy. They tend to concentrate towards the center of the Galaxy, with many in the constellations Sagittarius, Scorpio and Ophiunchus It was by studying the distribution of g ...
Lecture5 - Tufts Institute of Cosmology
... • “Spiral Nebulae” are outside our Galaxy • “Spiral Nebulae” are systems of stars, i.e., other galaxies • Slipher’s spectroscopic measurements high radial velocities • Showed photos of spiral nebulae – with absorbing bands ...
... • “Spiral Nebulae” are outside our Galaxy • “Spiral Nebulae” are systems of stars, i.e., other galaxies • Slipher’s spectroscopic measurements high radial velocities • Showed photos of spiral nebulae – with absorbing bands ...
Star formation
Star formation is the process by which dense regions within molecular clouds in interstellar space, sometimes referred to as ""stellar nurseries"" or ""star-forming regions"", collapse to form stars. As a branch of astronomy, star formation includes the study of the interstellar medium (ISM) and giant molecular clouds (GMC) as precursors to the star formation process, and the study of protostars and young stellar objects as its immediate products. It is closely related to planet formation, another branch of astronomy. Star formation theory, as well as accounting for the formation of a single star, must also account for the statistics of binary stars and the initial mass function.In June 2015, astronomers reported evidence for Population III stars in the Cosmos Redshift 7 galaxy at z = 6.60. Such stars are likely to have existed in the very early universe (i.e., at high redshift), and may have started the production of chemical elements heavier than hydrogen that are needed for the later formation of planets and life as we know it.