The Next 2-3 Weeks
... • What is a metric? • The Schwarzschild metric (= non-rotating black hole) • “The orbit of a satellite” (somewhat flakey example) I will present additional material assuming that you have read at least 17.2. ...
... • What is a metric? • The Schwarzschild metric (= non-rotating black hole) • “The orbit of a satellite” (somewhat flakey example) I will present additional material assuming that you have read at least 17.2. ...
Chapter 14 – Chemical Analysis
... • The higher the damping constant, the stronger the lines get at the same abundance. • The damping parts of the COG will look different for different lines ...
... • The higher the damping constant, the stronger the lines get at the same abundance. • The damping parts of the COG will look different for different lines ...
ppt
... Cloud and star formation may have to be treated together Both magnetic and non-magnetic turbulence simulations are promising Observations of the large scale magnetic field strength are needed to judge its global support ...
... Cloud and star formation may have to be treated together Both magnetic and non-magnetic turbulence simulations are promising Observations of the large scale magnetic field strength are needed to judge its global support ...
Atoms and Stars IST 3360 and IST 1990
... Lab 3 Pt 1 Calculations (cont’d) Calculations on the times to roll down the track: 3. Then (the core): are the divided times equal, within the errors? (also from Part F) A. Find the highest and lowest divided averages from #2 and subtract them (= DIFF) B. Find the two highest averages errors from 1 ...
... Lab 3 Pt 1 Calculations (cont’d) Calculations on the times to roll down the track: 3. Then (the core): are the divided times equal, within the errors? (also from Part F) A. Find the highest and lowest divided averages from #2 and subtract them (= DIFF) B. Find the two highest averages errors from 1 ...
Astrometric Measurements of the Visual Double Star Epsilon Lyrae
... The Celestron 8 team used a scale constant obtained in observations of STFA 43AB. Separation Because Nimbus II is a “push” Dobsonian telescope without tracking, the stars drifted across the field fairly rapidly. As a result, separations needed to be estimated on the fly. We first attempted to provid ...
... The Celestron 8 team used a scale constant obtained in observations of STFA 43AB. Separation Because Nimbus II is a “push” Dobsonian telescope without tracking, the stars drifted across the field fairly rapidly. As a result, separations needed to be estimated on the fly. We first attempted to provid ...
Gilmore - Astrometry and Astrophysics in the Gaia sky
... • Parallax distances, orbits, and internal dynamics of nearby galaxies • Galaxy survey, including large-scale structure • ~500,000 quasars: kinematic and photometric detection • ~100,000 supernovae • Ω M, Ω Λ from multiple quasar images (3500 to 21 mag) • Galactocentric acceleration: 0.2 nm/s2 ⇒ ∆(a ...
... • Parallax distances, orbits, and internal dynamics of nearby galaxies • Galaxy survey, including large-scale structure • ~500,000 quasars: kinematic and photometric detection • ~100,000 supernovae • Ω M, Ω Λ from multiple quasar images (3500 to 21 mag) • Galactocentric acceleration: 0.2 nm/s2 ⇒ ∆(a ...
Constellations - Sierra Star Gazers
... is also known as the Cygnus Loop. Composed of NGC 6960, 6992 and 6995, this large collection of nebulosity is the result of a supernova explosion about 2,500 light years distant that occurred some 15,000 years ago. This type II supernova marked the final chapter in the life of a supergiant star with ...
... is also known as the Cygnus Loop. Composed of NGC 6960, 6992 and 6995, this large collection of nebulosity is the result of a supernova explosion about 2,500 light years distant that occurred some 15,000 years ago. This type II supernova marked the final chapter in the life of a supergiant star with ...
The Montreal White Dwarf Database: a Tool for the Community
... spreadsheets (one .csv file per paper/source) all the information (names, magnitudes, effective temperature, surface gravity, abundances etc.) contained in the tables of well known papers that analyzed large samples (we also included compilations from a few review papers and websites). Since a star ...
... spreadsheets (one .csv file per paper/source) all the information (names, magnitudes, effective temperature, surface gravity, abundances etc.) contained in the tables of well known papers that analyzed large samples (we also included compilations from a few review papers and websites). Since a star ...
Neutron Star
... probably related to the deaths of very massive (> 25 Msun) stars. In a supernova-like explosion of stars this massive, the core might collapse not to a neutron star, but directly to a black hole. Such stellar explosions are ...
... probably related to the deaths of very massive (> 25 Msun) stars. In a supernova-like explosion of stars this massive, the core might collapse not to a neutron star, but directly to a black hole. Such stellar explosions are ...
Rotation Periods and Relative Ages of Solar-Type Stars
... The relationship between stellar rotation periods (Prot) and relative ages of stars in a sample of Sun-like stars was examined, then compared to other age determination methods. The majority of stars exhibited increasing Prot as a function of increasing age, as expected. The accuracy of the analysis ...
... The relationship between stellar rotation periods (Prot) and relative ages of stars in a sample of Sun-like stars was examined, then compared to other age determination methods. The majority of stars exhibited increasing Prot as a function of increasing age, as expected. The accuracy of the analysis ...
Project Descriptions - UCI Physics and Astronomy
... be mistaken for stars. However, their close proximity to the Earth also makes their apparent motion across the sky much faster than the background stars. This allows us to identify asteroids by taking two images of the same region of the sky observed at different times and quickly flashing from one ...
... be mistaken for stars. However, their close proximity to the Earth also makes their apparent motion across the sky much faster than the background stars. This allows us to identify asteroids by taking two images of the same region of the sky observed at different times and quickly flashing from one ...
AST1100 Lecture Notes
... Several stars show periodic changes in their apparent magnitudes. This was first thought to be caused by dark spots on a rotating star’s surface: When the dark spots were turned towards us, the star appeared fainter, when the spots were turned away from us, the star appeared brighter. Today we know ...
... Several stars show periodic changes in their apparent magnitudes. This was first thought to be caused by dark spots on a rotating star’s surface: When the dark spots were turned towards us, the star appeared fainter, when the spots were turned away from us, the star appeared brighter. Today we know ...
The Stars education kit - Student activities 5-10
... Southern Cross on your planisphere and locate them in the real night sky. 6. Continue to look for other bright stars and constellations in the night sky using the Southern Cross as your starting place. 7. Once you have found all the constellations and stars on this dial, you may want to change your ...
... Southern Cross on your planisphere and locate them in the real night sky. 6. Continue to look for other bright stars and constellations in the night sky using the Southern Cross as your starting place. 7. Once you have found all the constellations and stars on this dial, you may want to change your ...
Bushnell North Star 127mm Maksutov Cassegrain review
... computer, is not acceptable: every user should start the process anew, until you achieve a 5***** rating. Stated differently, and when I first purchased the unit, whenever I was given a rating less than 5*****, I kept on aligning the telescope to more stars, until I finally achieved 5 *****. After a ...
... computer, is not acceptable: every user should start the process anew, until you achieve a 5***** rating. Stated differently, and when I first purchased the unit, whenever I was given a rating less than 5*****, I kept on aligning the telescope to more stars, until I finally achieved 5 *****. After a ...
Diapositiva 1
... Discrete classification of objects: (single stars, QSOs, unresolved binaries, galaxies) Identification of QSOs (reference frame) Basic stellar parameters for single stars as input for RVS data processing: Log(g),Teff, [Fe/H], Av Derivation of L,R, age ,m using parallaxes (and stellar models) Paramet ...
... Discrete classification of objects: (single stars, QSOs, unresolved binaries, galaxies) Identification of QSOs (reference frame) Basic stellar parameters for single stars as input for RVS data processing: Log(g),Teff, [Fe/H], Av Derivation of L,R, age ,m using parallaxes (and stellar models) Paramet ...
Diapositiva 1
... Discrete classification of objects: (single stars, QSOs, unresolved binaries, galaxies) Identification of QSOs (reference frame) Basic stellar parameters for single stars as input for RVS data processing: Log(g),Teff, [Fe/H], Av Derivation of L,R, age ,m using parallaxes (and stellar models) Paramet ...
... Discrete classification of objects: (single stars, QSOs, unresolved binaries, galaxies) Identification of QSOs (reference frame) Basic stellar parameters for single stars as input for RVS data processing: Log(g),Teff, [Fe/H], Av Derivation of L,R, age ,m using parallaxes (and stellar models) Paramet ...
Magnetic fields in O-, B-and A-type stars on the main sequence
... Massive stars have thin sub-surface convective layers that are induced by the iron opacity bump near the surface. Therefore, it is plausible that a dynamo process can operate in the sub-surface convection zones. Moreover, these fields could reach the stellar surface and it is shown that increasing s ...
... Massive stars have thin sub-surface convective layers that are induced by the iron opacity bump near the surface. Therefore, it is plausible that a dynamo process can operate in the sub-surface convection zones. Moreover, these fields could reach the stellar surface and it is shown that increasing s ...
Hipparcos
Hipparcos was a scientific satellite of the European Space Agency (ESA), launched in 1989 and operated until 1993. It was the first space experiment devoted to precision astrometry, the accurate measurement of the positions of celestial objects on the sky. This permitted the accurate determination of proper motions and parallaxes of stars, allowing a determination of their distance and tangential velocity. When combined with radial-velocity measurements from spectroscopy, this pinpointed all six quantities needed to determine the motion of stars. The resulting Hipparcos Catalogue, a high-precision catalogue of more than 118,200 stars, was published in 1997. The lower-precision Tycho Catalogue of more than a million stars was published at the same time, while the enhanced Tycho-2 Catalogue of 2.5 million stars was published in 2000. Hipparcos ' follow-up mission, Gaia, was launched in 2013.The word ""Hipparcos"" is an acronym for High precision parallax collecting satellite and also a reference to the ancient Greek astronomer Hipparchus of Nicaea, who is noted for applications of trigonometry to astronomy and his discovery of the precession of the equinoxes.