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The Stellar Population Synthesis Technique Charlie Conroy Princeton
... Recent work has shown that the stellar masses estimated from different SPS models do not agree – Offsets of a factor of ~2 – The effect is a function of the age of the stars • Worse at higher redshift (Maraston et al. 2006) ...
... Recent work has shown that the stellar masses estimated from different SPS models do not agree – Offsets of a factor of ~2 – The effect is a function of the age of the stars • Worse at higher redshift (Maraston et al. 2006) ...
Artificial Intelligence on the Final Frontier: Using
... For ages, mankind has looked towards the stars and wondered if our Earth is the only place habitable for life. Now, with recent advancements in technology, we can use powerful telescopes, such as NASA’s Kepler Space Telescope [1], to observe stars in the visible universe to see if these extrasolar s ...
... For ages, mankind has looked towards the stars and wondered if our Earth is the only place habitable for life. Now, with recent advancements in technology, we can use powerful telescopes, such as NASA’s Kepler Space Telescope [1], to observe stars in the visible universe to see if these extrasolar s ...
Is $^ 6$ Li in metal-poor halo stars produced in situ by solar
... It has been known for many years that the chromospheric and coronal activities of dwarf stars are closely related to their rotation (Kraft 1967). This relationship results from the generation and amplification of surface magnetic fields by a complex dynamo mechanism, whose efficiency depends on the in ...
... It has been known for many years that the chromospheric and coronal activities of dwarf stars are closely related to their rotation (Kraft 1967). This relationship results from the generation and amplification of surface magnetic fields by a complex dynamo mechanism, whose efficiency depends on the in ...
Undiscovered Worlds educators guide
... line-of-sight, are visible to us as either periodic dimming (called “transits”) or shifting wavelengths within the electromagnetic spectrum (referred to as a “wobble”). To find a world capable of supporting life, scientists target rocky, terrestrial worlds, but they are not always hospitable. Take t ...
... line-of-sight, are visible to us as either periodic dimming (called “transits”) or shifting wavelengths within the electromagnetic spectrum (referred to as a “wobble”). To find a world capable of supporting life, scientists target rocky, terrestrial worlds, but they are not always hospitable. Take t ...
transit of Venus - Glenn Schneider
... 1857 A I R Y H A D F O R M U L A T E D a general plan for observing the 1874 transit of Venus, and by 1870 Britain was constructing the necessary instruments. Similar plans were under way in other parts of the scientific world. As the much anticipated event approached, no fewer than 26 expeditions w ...
... 1857 A I R Y H A D F O R M U L A T E D a general plan for observing the 1874 transit of Venus, and by 1870 Britain was constructing the necessary instruments. Similar plans were under way in other parts of the scientific world. As the much anticipated event approached, no fewer than 26 expeditions w ...
ABSTRACT XMM-Newton X-Ray Spectroscopy of the B2 Bright Giant
... to thousands of kilometers per second, within a few stellar radii of the surface. The wind of a lORe,) star can be accelerated to its terminal velocity of 2000 km s-l in 10 4 seconds, with about 10 7 photons scattering off each ion per second (Lamers & Cassinelli 1999). It is possible for the wind t ...
... to thousands of kilometers per second, within a few stellar radii of the surface. The wind of a lORe,) star can be accelerated to its terminal velocity of 2000 km s-l in 10 4 seconds, with about 10 7 photons scattering off each ion per second (Lamers & Cassinelli 1999). It is possible for the wind t ...
The kinematics of Galaxies in Compact Groups
... galaxies in compact groups have “too low velocities for their luminosities or, luminosities which are overbright for their rotation velocities”. HCGs have low M/L compared to field by 30% - this could be explained if they have smaller dark halos than their field counterparts. WE REVISIT THIS PROBLEM ...
... galaxies in compact groups have “too low velocities for their luminosities or, luminosities which are overbright for their rotation velocities”. HCGs have low M/L compared to field by 30% - this could be explained if they have smaller dark halos than their field counterparts. WE REVISIT THIS PROBLEM ...
Vedic Cosmography and Astronomy 1
... that Vaiñëavas have traditionally made use of the astronomical siddhäntas and that both Çréla Prabhupäda and Çréla Bhaktisiddhänta Sarasvaté Öhäkura have referred to them. At the same time, we have pointed out that the authors of the astronomical siddhäntas, such as Bhäskaräcärya, have been unable t ...
... that Vaiñëavas have traditionally made use of the astronomical siddhäntas and that both Çréla Prabhupäda and Çréla Bhaktisiddhänta Sarasvaté Öhäkura have referred to them. At the same time, we have pointed out that the authors of the astronomical siddhäntas, such as Bhäskaräcärya, have been unable t ...
Archaeoastronomy, Astronomy of Celts, A. Gaspani
... phenomena, such as the eclipses or the visibility of the planets, has strengthened the belief in the magic power of the members of this class, the Druids. It is well known that the role of this class was not just consultative, it also dominated the local political life among the Celtic community. An ...
... phenomena, such as the eclipses or the visibility of the planets, has strengthened the belief in the magic power of the members of this class, the Druids. It is well known that the role of this class was not just consultative, it also dominated the local political life among the Celtic community. An ...
Sample Exam for 3 rd Astro Exam
... A. In the galactic halo. B. In the galactic nuclear bulge C. Beyond the Sun above and below the galactic mid-plane D. Perpendicular to the galactic plane. E. In the galactic mid-plane 16. True or false: The Sun is located within the galactic gas layer of the Milky Way A. True B. False C. I have no @ ...
... A. In the galactic halo. B. In the galactic nuclear bulge C. Beyond the Sun above and below the galactic mid-plane D. Perpendicular to the galactic plane. E. In the galactic mid-plane 16. True or false: The Sun is located within the galactic gas layer of the Milky Way A. True B. False C. I have no @ ...
Stellar Evolution
... far beyond carbon in its core, leading to a very different fate Its path across the H-R diagram is essentially a straight line It stays at just about the same luminosity as it cools off Eventually the star dies in a violent explosion called a supernova Astronomy 1-2 ...
... far beyond carbon in its core, leading to a very different fate Its path across the H-R diagram is essentially a straight line It stays at just about the same luminosity as it cools off Eventually the star dies in a violent explosion called a supernova Astronomy 1-2 ...
doc
... certain point, the newly forming object becomes visible. At this stage the large luminous body is called a protostar. The other half of its gravitational energy remains within the protostar as heat. As contraction continues, the internal temperature of the protostar keeps rising, and when it reaches ...
... certain point, the newly forming object becomes visible. At this stage the large luminous body is called a protostar. The other half of its gravitational energy remains within the protostar as heat. As contraction continues, the internal temperature of the protostar keeps rising, and when it reaches ...
Chasing the Pole — Howard L. Cohen
... north pointing star, especially about its interesting physical characteristics. In fact, this star goes by at least three dozen monikers including Alpha Ursae Minoris Aa (abbreviation Alf or á UMi Aa), One UMi Aa (1 UMi Aa), the “Lodestar” (rarely used) and dozens of catalog designations as HD 8890, ...
... north pointing star, especially about its interesting physical characteristics. In fact, this star goes by at least three dozen monikers including Alpha Ursae Minoris Aa (abbreviation Alf or á UMi Aa), One UMi Aa (1 UMi Aa), the “Lodestar” (rarely used) and dozens of catalog designations as HD 8890, ...
2. Galileo Magnifico
... refractor that uses two small single lenses. Cardboard or PVC tubing makes a good, inexpensive telescope tube. One lens, the objective, is fixed at the far end of the telescope tube and collects and focuses incoming light; the other lens, the eyepiece, magnifies the image and is mounted in a smalle ...
... refractor that uses two small single lenses. Cardboard or PVC tubing makes a good, inexpensive telescope tube. One lens, the objective, is fixed at the far end of the telescope tube and collects and focuses incoming light; the other lens, the eyepiece, magnifies the image and is mounted in a smalle ...
Notes (PowerPoint)
... Built great observatories on his island Fights, duels, possibly died from being drunk, but also careful astronomical measurements • Convinced astronomy needed good measurements ...
... Built great observatories on his island Fights, duels, possibly died from being drunk, but also careful astronomical measurements • Convinced astronomy needed good measurements ...
Parallax - Georgia State University
... rotation, translation and scaling necessary to place each reference star in each frame where it's supposed to be. These look nasty. The position of the target star is calculated based on the average of these dependencies. ...
... rotation, translation and scaling necessary to place each reference star in each frame where it's supposed to be. These look nasty. The position of the target star is calculated based on the average of these dependencies. ...
Constellations Overview
... scientific terms they provide a system that allows the easy location and identification of individual stars. ...
... scientific terms they provide a system that allows the easy location and identification of individual stars. ...
astronomy advisory panel strategy
... Understanding the birth of stars is fundamental to astrophysics. Any realistic explanation of the formation and evolution of galaxies requires us to know what determines the rate of star formation, what determines any variation in the mass distribution of stars formed, and what determines the charac ...
... Understanding the birth of stars is fundamental to astrophysics. Any realistic explanation of the formation and evolution of galaxies requires us to know what determines the rate of star formation, what determines any variation in the mass distribution of stars formed, and what determines the charac ...
3.2 Spectra and Spectral Classification
... (a) absolute magnitude or luminosity and (b) spectral type or effective temperature (sometimes also color index) That means there exist different forms of this diagram, usually ● log L versus spectral type ● log L versus log T ● M versus B-V ...
... (a) absolute magnitude or luminosity and (b) spectral type or effective temperature (sometimes also color index) That means there exist different forms of this diagram, usually ● log L versus spectral type ● log L versus log T ● M versus B-V ...
24_Testbank - Lick Observatory
... 1) Why is ozone so crucial to the continued well-being of life on Earth? Answer: Ozone (O3) absorbs ultraviolet photons from the Sun and prevents them from reaching the ground where these high-energy photons would harm biological life. 2) Suppose a future telescope is able to take a spectrum of a te ...
... 1) Why is ozone so crucial to the continued well-being of life on Earth? Answer: Ozone (O3) absorbs ultraviolet photons from the Sun and prevents them from reaching the ground where these high-energy photons would harm biological life. 2) Suppose a future telescope is able to take a spectrum of a te ...
–1– 1. Introduction for AY 219 The periodic table of the elements
... X-ray photons from very hot gas (thermal source) such as might be found in a cluster of galaxies, as well as from various non-thermal sources such as SN, accreting black holes in the nuclei of galaxies, various types of energetic binaies, etc. Discrete line transitions are of very high energy and re ...
... X-ray photons from very hot gas (thermal source) such as might be found in a cluster of galaxies, as well as from various non-thermal sources such as SN, accreting black holes in the nuclei of galaxies, various types of energetic binaies, etc. Discrete line transitions are of very high energy and re ...
Stars
... Solar Activity The Sun’s magnetic field and sunspots • The Sun’s magnetic field disturbs the solar atmosphere periodically and causes new features to appear. A sunspot is a dark spot on the surface of the photosphere that typically lasts two months, occurs in pairs, and has a penumbra and an umbra. ...
... Solar Activity The Sun’s magnetic field and sunspots • The Sun’s magnetic field disturbs the solar atmosphere periodically and causes new features to appear. A sunspot is a dark spot on the surface of the photosphere that typically lasts two months, occurs in pairs, and has a penumbra and an umbra. ...
International Ultraviolet Explorer
![](https://en.wikipedia.org/wiki/Special:FilePath/International_Ultraviolet_Explorer.gif?width=300)
The International Ultraviolet Explorer (IUE) was an astronomical observatory satellite primarily designed to take ultraviolet spectra. The satellite was a collaborative project between NASA, the UK Science Research Council and the European Space Agency (ESA). The mission was first proposed in early 1964, by a group of scientists in the United Kingdom, and was launched on January 26, 1978 aboard a NASA Delta rocket. The mission lifetime was initially set for 3 years, but in the end it lasted almost 18 years, with the satellite being shut down in 1996. The switch-off occurred for financial reasons, while the telescope was still functioning at near original efficiency.It was the first space observatory to be operated in real time by astronomers who visited the groundstations in the United States and Europe. Astronomers made over 104,000 observations using the IUE, of objects ranging from solar system bodies to distant quasars. Among the significant scientific results from IUE data were the first large scale studies of stellar winds, accurate measurements of the way interstellar dust absorbs light, and measurements of the supernova SN1987A which showed that it defied stellar evolution theories as they then stood. When the mission ended, it was considered the most successful astronomical satellite ever.