Ch. 19 (Starbirth)
... from it should never be made available to students except by instructors using the accompanying text in their classes. All recipients of this work are expected to abide by these restrictions and to honor the intended pedagogical purposes and the needs of other instructors who rely on these materials ...
... from it should never be made available to students except by instructors using the accompanying text in their classes. All recipients of this work are expected to abide by these restrictions and to honor the intended pedagogical purposes and the needs of other instructors who rely on these materials ...
The cosmological distance ladder
... the distances to globular clusters in our Galaxy. This allowed him to determine the distance to the center of the Galaxy. In 1924 Edwin Hubble used Cepheids to show that the Andromeda Nebula is very much like our Milky Way Galaxy. Both are large ensembles of a couple hundred billion stars. And the A ...
... the distances to globular clusters in our Galaxy. This allowed him to determine the distance to the center of the Galaxy. In 1924 Edwin Hubble used Cepheids to show that the Andromeda Nebula is very much like our Milky Way Galaxy. Both are large ensembles of a couple hundred billion stars. And the A ...
Sin título de diapositiva - Universitat de Barcelona
... The GAIA mission, the next ESA Cornerstone 6 (launch 2010- 2012), will create a precise three dimensional map of about one billion stars throughout our Galaxy and beyond. To reach the scientific goals, that is to quantify the dynamical, chemical and star formation evolution of the Milky Way, it is c ...
... The GAIA mission, the next ESA Cornerstone 6 (launch 2010- 2012), will create a precise three dimensional map of about one billion stars throughout our Galaxy and beyond. To reach the scientific goals, that is to quantify the dynamical, chemical and star formation evolution of the Milky Way, it is c ...
Cole Miller: Challenges in the measurements of neutron star radii
... Current radius estimates are all dominated by systematics Light curve fitting shows promise: No deviations we have tried from our models produce significant biases while fitting well and also giving apparently strong constraints. LOFT, AXTAR, NICER Future measurements of M and R using gravitational ...
... Current radius estimates are all dominated by systematics Light curve fitting shows promise: No deviations we have tried from our models produce significant biases while fitting well and also giving apparently strong constraints. LOFT, AXTAR, NICER Future measurements of M and R using gravitational ...
Origin of Chemical Elements
... • What can we learn from telescopes? Modern telescopes (especially space telescopes) allow us to observe all the EM waves emitted by stars, not just visible ...
... • What can we learn from telescopes? Modern telescopes (especially space telescopes) allow us to observe all the EM waves emitted by stars, not just visible ...
Stellar Death Final Phases
... After the post-AGB phase, the death of the star is close at hand. Function of Mass (For stars < ~ 4 solar masses) 1. Lowest mass stars will never have sufficient pressure and temperature for the electron-degenerate He core to begin fusion. 2. Intermediate mass stars will never have sufficient pressu ...
... After the post-AGB phase, the death of the star is close at hand. Function of Mass (For stars < ~ 4 solar masses) 1. Lowest mass stars will never have sufficient pressure and temperature for the electron-degenerate He core to begin fusion. 2. Intermediate mass stars will never have sufficient pressu ...
Chapter 14
... If the stellar core has more than three solar masses after supernova, then no known force can halt the collapse ...
... If the stellar core has more than three solar masses after supernova, then no known force can halt the collapse ...
Looking back in time to the big bang theory activity
... There are opportunities for independent, pair and group work with both of these tasks, as well as links to ICT, English skills, and presentation skills. You can also link this work to how science works. The redshift analysis task gives learners an opportunity to relate what they have learned to a re ...
... There are opportunities for independent, pair and group work with both of these tasks, as well as links to ICT, English skills, and presentation skills. You can also link this work to how science works. The redshift analysis task gives learners an opportunity to relate what they have learned to a re ...
SN 2004dj
... consistent with a B-type star; 2) Such an extremely blue and bright star is most likely to be a luminous blue variable, but it did not show significant light variations on a time scale of few years; 3) The high reddening would imply an unrealistic high luminosity for a SN 2004dj as a type II-P SN. ...
... consistent with a B-type star; 2) Such an extremely blue and bright star is most likely to be a luminous blue variable, but it did not show significant light variations on a time scale of few years; 3) The high reddening would imply an unrealistic high luminosity for a SN 2004dj as a type II-P SN. ...
BOSS DR12: Clustering of galaxies &Dark Matter halos Sergio Rodríguez-Torres
... • Extend model to study incomplete samples as ELG and QSO for eBOSS and future surveys • Study our current method to populate galaxies using intrinsic samples of galaxies. ...
... • Extend model to study incomplete samples as ELG and QSO for eBOSS and future surveys • Study our current method to populate galaxies using intrinsic samples of galaxies. ...
Lectures 7-9 - U of L Class Index
... If an atom is struck by a photon that has enough energy, it will absorb the photon. This puts the atom into an excited state. (An atom that has absorbed no energy from external sources is said to be in its ground state.) ...
... If an atom is struck by a photon that has enough energy, it will absorb the photon. This puts the atom into an excited state. (An atom that has absorbed no energy from external sources is said to be in its ground state.) ...
Lectures 7-9
... If an atom is struck by a photon that has enough energy, it will absorb the photon. This puts the atom into an excited state. (An atom that has absorbed no energy from external sources is said to be in its ground state.) ...
... If an atom is struck by a photon that has enough energy, it will absorb the photon. This puts the atom into an excited state. (An atom that has absorbed no energy from external sources is said to be in its ground state.) ...
Lab 8: Stellar Classification and the H
... As early as the beginning of the 19th century, scientists have studied absorption spectra in an effort to classify stars. At first, spectra were divided into groups by general appearance; however, in the 1930’s and 1940’s, astronomers realized that spectral type was mainly determined by temperature ...
... As early as the beginning of the 19th century, scientists have studied absorption spectra in an effort to classify stars. At first, spectra were divided into groups by general appearance; however, in the 1930’s and 1940’s, astronomers realized that spectral type was mainly determined by temperature ...
a. What do we mean by a light year?
... observed. If a star is 10 light years away, light takes ten years to make the trip and tells us about the star ten years ago. The further away we look the longer light takes to make the trip and the further back in time we are seeing. ...
... observed. If a star is 10 light years away, light takes ten years to make the trip and tells us about the star ten years ago. The further away we look the longer light takes to make the trip and the further back in time we are seeing. ...
natsci9+
... Life demands the presence of elements, heavier than hydrogen. The production of heavy elements demands thermonuclear combustion. Thermonuclear combustion normally requires several 109 years of cookin time in a star. Several 109 years of time will not and cannot be available in a closed universe, acc ...
... Life demands the presence of elements, heavier than hydrogen. The production of heavy elements demands thermonuclear combustion. Thermonuclear combustion normally requires several 109 years of cookin time in a star. Several 109 years of time will not and cannot be available in a closed universe, acc ...
Lecture 28 - LSU Physics
... Interference: Example A red light beam with wavelength λ=0.625µm travels through glass (n=1.46) a distance of 1mm. A second beam, parallel to the first one and originally in phase with it, travels the same distance through sapphire (n=1.77). •How many wavelengths are there of each beam inside the m ...
... Interference: Example A red light beam with wavelength λ=0.625µm travels through glass (n=1.46) a distance of 1mm. A second beam, parallel to the first one and originally in phase with it, travels the same distance through sapphire (n=1.77). •How many wavelengths are there of each beam inside the m ...
No Slide Title
... How they interfere will depend on the relative indices of refraction. In the example above the first ray suffers a 180 degree phase change (1/2 a wavelength) upon reflection. The second ray does not change phase in reflection, but has to travel a longer distance to come back up. The distance is twic ...
... How they interfere will depend on the relative indices of refraction. In the example above the first ray suffers a 180 degree phase change (1/2 a wavelength) upon reflection. The second ray does not change phase in reflection, but has to travel a longer distance to come back up. The distance is twic ...
Document
... of iron. Other elements – hydrogen, helium, carbon, oxygen, and silicon, burn in successive layers (moving inward). The luminosity is almost constant, at all stages of the evolution. These stars move horizontally across the HR diagram. Stars with M> 30 solar masses may lose all, or almost all, of th ...
... of iron. Other elements – hydrogen, helium, carbon, oxygen, and silicon, burn in successive layers (moving inward). The luminosity is almost constant, at all stages of the evolution. These stars move horizontally across the HR diagram. Stars with M> 30 solar masses may lose all, or almost all, of th ...
Writing a good ALMA proposal
... M82 is an interesting galaxy, which hosts active star formation. M82 is an interesting galaxy because of its active star formation. ...
... M82 is an interesting galaxy, which hosts active star formation. M82 is an interesting galaxy because of its active star formation. ...
Star in a Box Worksheet - Beginning
... 1. What stages of their lives the two stars are in. 2. How long each star has to live. ...
... 1. What stages of their lives the two stars are in. 2. How long each star has to live. ...
AST 341 Final Exam and Solutions
... 0.1/1.67 × 10−24 nucleons, or about 5×1057 nucleons. The total binding energy, which is that produced in nuclear fusion (and available for the supernova), is 5×1057 nucleons × 9 MeV/nucleon. 1 MeV is 1.6×10−6 erg. Multiply this out to get a total energy of about 5×1052 erg. 5×1052 erg radiated in 5× ...
... 0.1/1.67 × 10−24 nucleons, or about 5×1057 nucleons. The total binding energy, which is that produced in nuclear fusion (and available for the supernova), is 5×1057 nucleons × 9 MeV/nucleon. 1 MeV is 1.6×10−6 erg. Multiply this out to get a total energy of about 5×1052 erg. 5×1052 erg radiated in 5× ...
Astronomical spectroscopy
Astronomical spectroscopy is the study of astronomy using the techniques of spectroscopy to measure the spectrum of electromagnetic radiation, including visible light, which radiates from stars and other hot celestial objects. Spectroscopy can be used to derive many properties of distant stars and galaxies, such as their chemical composition, temperature, density, mass, distance, luminosity, and relative motion using Doppler shift measurements.