Compact Extragalactic Star Formation
... • What are the properties of the youngest massive star clusters? How do they evolve to become globular clusters today? What is the luminosity function of SSCs, and the mass function of their star formation? • Is optical/IR modeling of star formation in SSCs consistent with radio observations? • How ...
... • What are the properties of the youngest massive star clusters? How do they evolve to become globular clusters today? What is the luminosity function of SSCs, and the mass function of their star formation? • Is optical/IR modeling of star formation in SSCs consistent with radio observations? • How ...
Final Review Questions. 1. Compare the atmospheric scale height of
... n = 1017 cm−3 ? 25. Go back to Worksheet #10 and do it again! Make sure to explain why a solar MS star evolves the way it does off the MS. Is the mass of the star constant during this evolution? 26. Derive the mass-radius relationship for white dwarfs in the non-relativistic limit. 27. Why do object ...
... n = 1017 cm−3 ? 25. Go back to Worksheet #10 and do it again! Make sure to explain why a solar MS star evolves the way it does off the MS. Is the mass of the star constant during this evolution? 26. Derive the mass-radius relationship for white dwarfs in the non-relativistic limit. 27. Why do object ...
Data Tables - AlmaMiddleSchoolScience
... Stars live and die on such a long time scale that humans often have a problem understanding that a star is a like giant factory that is driven by gravity to fuse light elements like hydrogen under heat and pressure into heavier atoms like helium and the other heavier elements of the periodic table. ...
... Stars live and die on such a long time scale that humans often have a problem understanding that a star is a like giant factory that is driven by gravity to fuse light elements like hydrogen under heat and pressure into heavier atoms like helium and the other heavier elements of the periodic table. ...
Beyond solar system
... The core of a star is a gigantic nuclear reactor where simple atoms melt and create more complex atoms. Most of a star’s existence is sustained by the fusion of hydrogen nuclei into helium nuclei. The energy produced by the reaction heats the gas which expands, thus opposing gravitational collapse, ...
... The core of a star is a gigantic nuclear reactor where simple atoms melt and create more complex atoms. Most of a star’s existence is sustained by the fusion of hydrogen nuclei into helium nuclei. The energy produced by the reaction heats the gas which expands, thus opposing gravitational collapse, ...
here - Tenafly Middle School
... Russell observed that stars with higher temperatures also have brighter absolute magnitudes. • They developed a graph to show this relationship (i.e. the Hertzsprung-Russel Diagram; H-R Diagram). • They placed temperatures across the bottom and absolute magnitudes up one side, showing the relationsh ...
... Russell observed that stars with higher temperatures also have brighter absolute magnitudes. • They developed a graph to show this relationship (i.e. the Hertzsprung-Russel Diagram; H-R Diagram). • They placed temperatures across the bottom and absolute magnitudes up one side, showing the relationsh ...
PH607lec10
... years, which is nearly as old as the Universe itself. This estimate is based on Very Large Telescope measurements of the beryllium content of two stars in globular cluster NGC 6397. This allowed astronomers to deduce the elapsed time between the rise of the first generation of stars in the entire Ga ...
... years, which is nearly as old as the Universe itself. This estimate is based on Very Large Telescope measurements of the beryllium content of two stars in globular cluster NGC 6397. This allowed astronomers to deduce the elapsed time between the rise of the first generation of stars in the entire Ga ...
Project 2 – Spectral Types of Stars
... Astr 221: General Astronomy II– Star, Galaxies & Cosmology ...
... Astr 221: General Astronomy II– Star, Galaxies & Cosmology ...
ASTRONOMY - Frost Middle School
... • Even though the distances between galaxy clusters are very large, gravity still acts between them • Because gravity acts over such great distances, gravity controls the size and shape of the universe ...
... • Even though the distances between galaxy clusters are very large, gravity still acts between them • Because gravity acts over such great distances, gravity controls the size and shape of the universe ...
Accretion Friction Braking in Stellar Metamorphosis
... The answer is that they do not. You do not build planets in outer space by slamming rocks together at any appreciable velocity, because they will bounce off each other like billiard balls or obliterate each other like artillery shells. Since planets are not formed by rocks slamming into each other a ...
... The answer is that they do not. You do not build planets in outer space by slamming rocks together at any appreciable velocity, because they will bounce off each other like billiard balls or obliterate each other like artillery shells. Since planets are not formed by rocks slamming into each other a ...
STAAR Science Tutorial 28 TEK 8.8A: Stars
... The universe contains all of the matter and energy known by humans to exist. Some scientists have hypothesized that there may be parallel universes that we cannot detect, but there is no evidence to support their existence. The universe is known to contain billions of galaxies, though it is impossib ...
... The universe contains all of the matter and energy known by humans to exist. Some scientists have hypothesized that there may be parallel universes that we cannot detect, but there is no evidence to support their existence. The universe is known to contain billions of galaxies, though it is impossib ...
STAAR Science Tutorial 34 TEK 8.8A: Stars, Galaxies
... The universe contains all of the matter and energy known by humans to exist. Some scientists have hypothesized that there may be parallel universes that we cannot detect, but there is no evidence to support their existence. The universe is known to contain billions of galaxies, though it is impossib ...
... The universe contains all of the matter and energy known by humans to exist. Some scientists have hypothesized that there may be parallel universes that we cannot detect, but there is no evidence to support their existence. The universe is known to contain billions of galaxies, though it is impossib ...
Stars off the Main Sequence - ScienceEducationatNewPaltz
... larger than it was in its main sequence phase ...
... larger than it was in its main sequence phase ...
N-Body Simulations of Star Clusters with IMBH
... Formation of IMBH's in star clusters McCrady et al. (2003) used the HST and Keck telescopes to determine the density profile and total masses for a number of young star clusters in M82. MGG-11 was the most concentrated (half-light radius 1.2 pc) and second heaviest cluster in their sample (M= 3.5*1 ...
... Formation of IMBH's in star clusters McCrady et al. (2003) used the HST and Keck telescopes to determine the density profile and total masses for a number of young star clusters in M82. MGG-11 was the most concentrated (half-light radius 1.2 pc) and second heaviest cluster in their sample (M= 3.5*1 ...
Oxygen production on the AGB and the relevance of planetary
... “dredge” into the intershell region " third dredge-up • This can lead to carbon star production, where C/O > 1 at the stellar surface • Correlated with an enrichment of heavy elements (s-process) Standard picture: Dominant process in stars between ~1.2 to 4Msun " These stars are NOT expected to pr ...
... “dredge” into the intershell region " third dredge-up • This can lead to carbon star production, where C/O > 1 at the stellar surface • Correlated with an enrichment of heavy elements (s-process) Standard picture: Dominant process in stars between ~1.2 to 4Msun " These stars are NOT expected to pr ...
The Search for Reflected Light
... of star + planet in the visual! → approx. 2300 stellar absorption lines + → these lines reflected by the planet, BUT - Doppler shifted due to orbital motion - faint (a few times 1/10000 ) ...
... of star + planet in the visual! → approx. 2300 stellar absorption lines + → these lines reflected by the planet, BUT - Doppler shifted due to orbital motion - faint (a few times 1/10000 ) ...
Astronomy
... Learning Target: Be able to explain what causes various types of stellar explosions Question of the day: Once you have your test back, use your book, notes and each other to correctly describe star formation, using terms such as nuclear fusion, protostar, Ttauri star, interstellar cloud, fragmenting ...
... Learning Target: Be able to explain what causes various types of stellar explosions Question of the day: Once you have your test back, use your book, notes and each other to correctly describe star formation, using terms such as nuclear fusion, protostar, Ttauri star, interstellar cloud, fragmenting ...
The life-cycle of stars - Young Scientists Journal
... formed in supernovae. The material blasted into space by this explosion is known as the supernova remnant. This is the most common type of supernova (called a core-collapse supernova), but there are other, more exotic supernovae that may happen when extremely large stars collapse [Figure 4]. ...
... formed in supernovae. The material blasted into space by this explosion is known as the supernova remnant. This is the most common type of supernova (called a core-collapse supernova), but there are other, more exotic supernovae that may happen when extremely large stars collapse [Figure 4]. ...
Nuclear Astrophysics (a Cosmic Cookbook)
... At the TRIUMF facility ‘ISAC’, we do exactly this: create exotic, short-lived radioactive nuclei only found in stars, and we either watch them decay, trap them and measure how heavy they are, or accelerate them and fuse them with other nuclei…… ...
... At the TRIUMF facility ‘ISAC’, we do exactly this: create exotic, short-lived radioactive nuclei only found in stars, and we either watch them decay, trap them and measure how heavy they are, or accelerate them and fuse them with other nuclei…… ...
astr study guide ex 3 s`16
... 38. Where are elements heavier than iron can only be created ? 39. When the mass of a star's core becomes greater than 1.4 times the mass of the Sun, degenerate electrons can no longer keep it as a white dwarf. Instead, what does it become? 40. To predict whether a star will ultimately become a blac ...
... 38. Where are elements heavier than iron can only be created ? 39. When the mass of a star's core becomes greater than 1.4 times the mass of the Sun, degenerate electrons can no longer keep it as a white dwarf. Instead, what does it become? 40. To predict whether a star will ultimately become a blac ...
Evolved massive stars in W33 and in GMC G23.3-0.3
... and at the parallactic distance of 2.4 kpc (Immer et al. 2013). We spectroscopically detected a few evolved O-type stars and one Wolf-Rayet star, but none of the late-type objects has the luminosity of a RSG star. Several dense molecular cores that may harbor proto clusters were recently discovered ...
... and at the parallactic distance of 2.4 kpc (Immer et al. 2013). We spectroscopically detected a few evolved O-type stars and one Wolf-Rayet star, but none of the late-type objects has the luminosity of a RSG star. Several dense molecular cores that may harbor proto clusters were recently discovered ...
New Discoveries in Planetary Systems and Star Formation through
... disks and debris disks will inspire new ideas to explain how planets form and migrate within young systems. We will not only continue to discover new and interesting planets but we will also begin to characterize and classify the properties of these planets and their atmospheres and cores. The disco ...
... disks and debris disks will inspire new ideas to explain how planets form and migrate within young systems. We will not only continue to discover new and interesting planets but we will also begin to characterize and classify the properties of these planets and their atmospheres and cores. The disco ...
Marcelo Borges Fernandes1, Michaela Kraus2, Jiri Kubát2
... and also a strong near or mid-infrared excess due to hot circumstellar dust. Based on Lamers et al. (1998), there are different types of objects presenting the B[e] phenomenon: pre-main sequence HAeBe stars, compact planetary nebula, symbiotic objects, hot supergiants – the most popular class with c ...
... and also a strong near or mid-infrared excess due to hot circumstellar dust. Based on Lamers et al. (1998), there are different types of objects presenting the B[e] phenomenon: pre-main sequence HAeBe stars, compact planetary nebula, symbiotic objects, hot supergiants – the most popular class with c ...
Planetary nebula
A planetary nebula, often abbreviated as PN or plural PNe, is a kind of emission nebula consisting of an expanding glowing shell of ionized gas ejected from old red giant stars late in their lives. The word ""nebula"" is Latin for mist or cloud and the term ""planetary nebula"" is a misnomer that originated in the 1780s with astronomer William Herschel because when viewed through his telescope, these objects appeared to him to resemble the rounded shapes of planets. Herschel's name for these objects was popularly adopted and has not been changed. They are a relatively short-lived phenomenon, lasting a few tens of thousands of years, compared to a typical stellar lifetime of several billion years.A mechanism for formation of most planetary nebulae is thought to be the following: at the end of the star's life, during the red giant phase, the outer layers of the star are expelled by strong stellar winds. Eventually, after most of the red giant's atmosphere is dissipated, the exposed hot, luminous core emits ultraviolet radiation to ionize the ejected outer layers of the star. Absorbed ultraviolet light energises the shell of nebulous gas around the central star, appearing as a bright coloured planetary nebula at several discrete visible wavelengths.Planetary nebulae may play a crucial role in the chemical evolution of the Milky Way, returning material to the interstellar medium from stars where elements, the products of nucleosynthesis (such as carbon, nitrogen, oxygen and neon), have been created. Planetary nebulae are also observed in more distant galaxies, yielding useful information about their chemical abundances.In recent years, Hubble Space Telescope images have revealed many planetary nebulae to have extremely complex and varied morphologies. About one-fifth are roughly spherical, but the majority are not spherically symmetric. The mechanisms which produce such a wide variety of shapes and features are not yet well understood, but binary central stars, stellar winds and magnetic fields may play a role.