The Transit Method
... One of these expeditions was by Guilaume Le Gentil who set out to the French colony of Pondicherry in India to observe the 1761 transit. He set out in March and reached Mauritius (Ile de France) in July 1760. But war broke out between France and England so he decided to take a ship to the Coromandel ...
... One of these expeditions was by Guilaume Le Gentil who set out to the French colony of Pondicherry in India to observe the 1761 transit. He set out in March and reached Mauritius (Ile de France) in July 1760. But war broke out between France and England so he decided to take a ship to the Coromandel ...
Research proposal uploaded for ESO fellowship
... Currently, toy models are used to treat supernova feedback, which are parametrized to reproduce the faint-end of the luminosity function (Cole et al. 2000; Guo et al. 2010). These toy models do not take into account key physical conditions, such as the density of the ISM of galaxies or how much ener ...
... Currently, toy models are used to treat supernova feedback, which are parametrized to reproduce the faint-end of the luminosity function (Cole et al. 2000; Guo et al. 2010). These toy models do not take into account key physical conditions, such as the density of the ISM of galaxies or how much ener ...
TAP702-0: Red shift - Teaching Advanced Physics
... Red shift The wavelengths of spectral lines emitted by atoms in an astronomical object are often increased compared to a similar source in the laboratory. We see the same pattern of lines (so we can recognize the elements from which they arise), but the whole pattern is shifted to longer wavelengths ...
... Red shift The wavelengths of spectral lines emitted by atoms in an astronomical object are often increased compared to a similar source in the laboratory. We see the same pattern of lines (so we can recognize the elements from which they arise), but the whole pattern is shifted to longer wavelengths ...
TAP702-0: Red shift - Teaching Advanced Physics
... Red shift The wavelengths of spectral lines emitted by atoms in an astronomical object are often increased compared to a similar source in the laboratory. We see the same pattern of lines (so we can recognize the elements from which they arise), but the whole pattern is shifted to longer wavelengths ...
... Red shift The wavelengths of spectral lines emitted by atoms in an astronomical object are often increased compared to a similar source in the laboratory. We see the same pattern of lines (so we can recognize the elements from which they arise), but the whole pattern is shifted to longer wavelengths ...
TAP702-0: Red shift - Teaching Advanced Physics
... Red shift The wavelengths of spectral lines emitted by atoms in an astronomical object are often increased compared to a similar source in the laboratory. We see the same pattern of lines (so we can recognize the elements from which they arise), but the whole pattern is shifted to longer wavelengths ...
... Red shift The wavelengths of spectral lines emitted by atoms in an astronomical object are often increased compared to a similar source in the laboratory. We see the same pattern of lines (so we can recognize the elements from which they arise), but the whole pattern is shifted to longer wavelengths ...
ASTR-100 - Jiri Brezina Teaching
... in 365.2564 days in the same (counter-clockwise, eastward) direction. See: http://www.nationmaster.com/encyclopedia/Sidereal-year During the Moon’s sidereal period, the sun moves eastward about 1°/day (360°/365.2564 days) = about 27° (26.928474° more exactly) eastward; this is why the moon needs sli ...
... in 365.2564 days in the same (counter-clockwise, eastward) direction. See: http://www.nationmaster.com/encyclopedia/Sidereal-year During the Moon’s sidereal period, the sun moves eastward about 1°/day (360°/365.2564 days) = about 27° (26.928474° more exactly) eastward; this is why the moon needs sli ...
Lecture 28 Formation of chemical elements
... elements heavier than He. We must look beyond our solar system for the birth of the elements that comprise it. Before we can understand the processes that make the chemical elements, we should look at the processes that formed matter itself. GG325 L28, F2013 ...
... elements heavier than He. We must look beyond our solar system for the birth of the elements that comprise it. Before we can understand the processes that make the chemical elements, we should look at the processes that formed matter itself. GG325 L28, F2013 ...
First astronomical unit scale image of the GW Orionis triple system
... Orionis as a triple system: both the secondary and tertiary companion are spatially resolved. Our results show that the inner stars have H-band fluxes within a factor of 2 of each other, which suggests that the exact status of the pair should be revisited. The outer companion is clearly detectable, ...
... Orionis as a triple system: both the secondary and tertiary companion are spatially resolved. Our results show that the inner stars have H-band fluxes within a factor of 2 of each other, which suggests that the exact status of the pair should be revisited. The outer companion is clearly detectable, ...
Formation of Globular Clusters: In and Out of Dwarf Galaxies
... • Globular clusters may form in giant molecular clouds in progenitor galaxies at intermediate redshifts • Model explains observed sizes, masses, ages, metallicities • Dynamical evolution explains the present mass function and may be important for metallicity bimodality • Red clusters in the Galaxy a ...
... • Globular clusters may form in giant molecular clouds in progenitor galaxies at intermediate redshifts • Model explains observed sizes, masses, ages, metallicities • Dynamical evolution explains the present mass function and may be important for metallicity bimodality • Red clusters in the Galaxy a ...
–1– 2. Milky Way We know a great deal, perhaps more than any
... • Herschel (1785) used star counts to infer a flattened distribution for the MW. • A similar, but much larger survey of nearby stars was done by Kapteyn around 1920. He used parallax, proper motions, radial velocities and spectra to infer the distance to stars. He inferred that the size of the MW is ...
... • Herschel (1785) used star counts to infer a flattened distribution for the MW. • A similar, but much larger survey of nearby stars was done by Kapteyn around 1920. He used parallax, proper motions, radial velocities and spectra to infer the distance to stars. He inferred that the size of the MW is ...
Chapter 15 Observational Evidence for Black Holes
... We have very strong reasons to believe that black holes exist and are being observed indirectly because of 1. Unseen massive companions in binary star systems that are • Strong sources of X-rays • Probably too massive to be anything other than black holes. 2. The centers of many galaxies where • Mas ...
... We have very strong reasons to believe that black holes exist and are being observed indirectly because of 1. Unseen massive companions in binary star systems that are • Strong sources of X-rays • Probably too massive to be anything other than black holes. 2. The centers of many galaxies where • Mas ...
Chapter 15, Galaxies
... around 1.0 M⊙, its luminosity is very consistent, and can be used as a standard candle for the measurement of distance to distant galaxies (Chapter 15). The amount of energy produced by white dwarf supernovae and massive star supernovae are about the same. But the properties of the light emitted fro ...
... around 1.0 M⊙, its luminosity is very consistent, and can be used as a standard candle for the measurement of distance to distant galaxies (Chapter 15). The amount of energy produced by white dwarf supernovae and massive star supernovae are about the same. But the properties of the light emitted fro ...
Precision age indicators that exploit chemically peculiar stars
... still of great value, blue photometric colors generally indicate galaxies with ongoing star formation, while red colors indicate galaxies that have not formed significant numbers of stars in the last few hundred million years. A technique that often gives higher precision is using Balmer feature str ...
... still of great value, blue photometric colors generally indicate galaxies with ongoing star formation, while red colors indicate galaxies that have not formed significant numbers of stars in the last few hundred million years. A technique that often gives higher precision is using Balmer feature str ...
the solar neighborhood. xi. the trigonometric parallax of scr
... used; details of these are shown in Table 2. These also provide a 9 yr baseline, ideal for measuring an accurate proper motion. Each plate was scanned individually on SuperCOSMOS and processed using standard methods (Hambly et al. 2001b and references therein). Global astrometric plate solutions res ...
... used; details of these are shown in Table 2. These also provide a 9 yr baseline, ideal for measuring an accurate proper motion. Each plate was scanned individually on SuperCOSMOS and processed using standard methods (Hambly et al. 2001b and references therein). Global astrometric plate solutions res ...
Galaxies (and stars) in the far infrared: results from the AKARI All
... Supply of metals to the interstellar space II: final life stages of stars The death of light stars : planetary nebulae (PNe) Stars with masses similar to the Sun run out the hydrogen in the core, change their equilibrium structure and expand, and become cool huge stars (red giant branch stars: RGBs ...
... Supply of metals to the interstellar space II: final life stages of stars The death of light stars : planetary nebulae (PNe) Stars with masses similar to the Sun run out the hydrogen in the core, change their equilibrium structure and expand, and become cool huge stars (red giant branch stars: RGBs ...
Primordial Planet Formation - University of California San Diego
... Here we are particularly interested in the planet signatures. Because of the small brief structures caused by quasar‐planetary alignments, the planet signatures are discussed under the topic of microlensing, or even nanolensing, and the first demonstration of the phenomenon operating at planetar ...
... Here we are particularly interested in the planet signatures. Because of the small brief structures caused by quasar‐planetary alignments, the planet signatures are discussed under the topic of microlensing, or even nanolensing, and the first demonstration of the phenomenon operating at planetar ...
Paper - Astrophysics - University of Oxford
... measurement of the death rate of stars more massive than 8 solar masses, and thermonuclear supernovae (Type Ia) are the result of the death of moderate mass stars (3-8 solar masses). Measuring the rate of supernova explosions across the Universe is a direct way to determine when stars form and in wh ...
... measurement of the death rate of stars more massive than 8 solar masses, and thermonuclear supernovae (Type Ia) are the result of the death of moderate mass stars (3-8 solar masses). Measuring the rate of supernova explosions across the Universe is a direct way to determine when stars form and in wh ...
Fulltext PDF - Indian Academy of Sciences
... the Sun and any star. Hence there would be no Doppler shift. However, there would be proper motion since the direction of the Sun-star line would rotate at Ω. This contributes a term independent of θ to the proper motion. (b) The effect of ‘differential rotation’. This term refers to the variation o ...
... the Sun and any star. Hence there would be no Doppler shift. However, there would be proper motion since the direction of the Sun-star line would rotate at Ω. This contributes a term independent of θ to the proper motion. (b) The effect of ‘differential rotation’. This term refers to the variation o ...
TWO DIFFERENT ALTITUDES
... 14. A navigational instrument made from a quarter (1/4) circle protractor is a _________. 15. A ___________measures altitude from ___° at the _______ to ___ ° at the _______. 16. The vertical angle of an object from the horizon is the ____________. 17. The horizontal angle of an object clockwise fro ...
... 14. A navigational instrument made from a quarter (1/4) circle protractor is a _________. 15. A ___________measures altitude from ___° at the _______ to ___ ° at the _______. 16. The vertical angle of an object from the horizon is the ____________. 17. The horizontal angle of an object clockwise fro ...
R136a1
RMC 136a1 (usually abbreviated to R136a1) is a Wolf-Rayet star located at the center of R136, the central condensation of stars of the large NGC 2070 open cluster in the Tarantula Nebula. It lies at a distance of about 50 kiloparsecs (163,000 light-years) in the Large Magellanic Cloud. It has the highest mass and luminosity of any known star, at 265 M☉ and 8.7 million L☉, and also one of the hottest at over 50,000 K.