Word doc - UC-HiPACC - University of California, Santa Cruz
... Indeed, the supernovae were so distant that not only was light expanded in wavelength, but also time was dilated or expanded (per Einstein’s theory of relativity). That time dilation stretched out the duration of the event so that, as seen from telescopes on Earth, the explosions seemed to unfold in ...
... Indeed, the supernovae were so distant that not only was light expanded in wavelength, but also time was dilated or expanded (per Einstein’s theory of relativity). That time dilation stretched out the duration of the event so that, as seen from telescopes on Earth, the explosions seemed to unfold in ...
Celestial Navigation education kit: Student activities 1-6
... Pole on Earth, the South Celestial Pole would be directly overhead and the stars overhead would seem to be rotating clockwise around this point. In Melbourne, the South Celestial Pole is at an angle of (approximately) 38 degrees above the horizon – Melbourne’s latitude. From southern Australia, star ...
... Pole on Earth, the South Celestial Pole would be directly overhead and the stars overhead would seem to be rotating clockwise around this point. In Melbourne, the South Celestial Pole is at an angle of (approximately) 38 degrees above the horizon – Melbourne’s latitude. From southern Australia, star ...
17_LectureOutline
... Once many stars are plotted on an H–R diagram, a pattern begins to form. These are the 80 closest stars to us; note the dashed lines of constant radius. The darkened curve is called the main sequence, as this is where most stars are. Also indicated is the white dwarf region; these stars are hot but ...
... Once many stars are plotted on an H–R diagram, a pattern begins to form. These are the 80 closest stars to us; note the dashed lines of constant radius. The darkened curve is called the main sequence, as this is where most stars are. Also indicated is the white dwarf region; these stars are hot but ...
Cepheus (constellation)
... between 3.5m and 4.4m over a period of 5 days and 9 hours. The Cepheids are a class of pulsating variable stars; Delta Cephei has a minimum size of 40 solar diameters and a maximum size of 46 solar diameters. It is also a double star; the yellow star also has a wide-set blue-hued companion of magnit ...
... between 3.5m and 4.4m over a period of 5 days and 9 hours. The Cepheids are a class of pulsating variable stars; Delta Cephei has a minimum size of 40 solar diameters and a maximum size of 46 solar diameters. It is also a double star; the yellow star also has a wide-set blue-hued companion of magnit ...
Seeds of a Tychonic Revolution: Telescopic Observations of the
... establishes that a relationship exists between the diameter of a star’s disk in arcseconds and its magnitude (brightness) as seen with the naked eye – diameter decreases with magnitude.c To Mareo, the decrease appears to be linear (figure 3). Inspired by the Copernican world system, Mareo ...
... establishes that a relationship exists between the diameter of a star’s disk in arcseconds and its magnitude (brightness) as seen with the naked eye – diameter decreases with magnitude.c To Mareo, the decrease appears to be linear (figure 3). Inspired by the Copernican world system, Mareo ...
Accuracy of spectroscopy-based radioactive dating of stars
... time interval t we want to measure and the decay time of the radioactive species, τ. From Eq. (7) or (9) it might appear that a radioactive species with short mean lifetime τ provides the highest precision on t. However, this reasoning ignores the fact that a rapid decay (τ t) makes it more difficul ...
... time interval t we want to measure and the decay time of the radioactive species, τ. From Eq. (7) or (9) it might appear that a radioactive species with short mean lifetime τ provides the highest precision on t. However, this reasoning ignores the fact that a rapid decay (τ t) makes it more difficul ...
LT telescope proposal (2011a)
... deviations in the stellar disk brightness; recent works (Huber et al. 2010, Silva-Valio et al. 2009 combined with Lanza et al. 2009) indicate that the strip occulted by the CoRoT-2’s planet has a lower surface brightness than the rest of the star; similar to the well-known tendency of solar spots to ...
... deviations in the stellar disk brightness; recent works (Huber et al. 2010, Silva-Valio et al. 2009 combined with Lanza et al. 2009) indicate that the strip occulted by the CoRoT-2’s planet has a lower surface brightness than the rest of the star; similar to the well-known tendency of solar spots to ...
PDF - STRW Local - Universiteit Leiden
... While the haloes of dark matter that are thought to host galaxies can be simulated accurately almost from first principles, this is not the case for the galaxies themselves, which consist mostly of baryonic (i.e. ordinary) matter. The difficulties stem from three problems. First, not only gravity, b ...
... While the haloes of dark matter that are thought to host galaxies can be simulated accurately almost from first principles, this is not the case for the galaxies themselves, which consist mostly of baryonic (i.e. ordinary) matter. The difficulties stem from three problems. First, not only gravity, b ...
The Astrophysical Origins of the Short
... Ejecta dust grains penetrate disk, evaporate on entry, but leave SLRs lodged in disk like aerogel: “Aerogel Model” ...
... Ejecta dust grains penetrate disk, evaporate on entry, but leave SLRs lodged in disk like aerogel: “Aerogel Model” ...
15.1 Introduction
... Spectroscopically, WR stars are spectacular in appearance: their optical and UV spectra are dominated by strong, broad emission lines instead of the narrow absorption lines that are typical of ‘normal’ stars (Figure 15.3). The emission lines are so strong that they were first noticed as early as 186 ...
... Spectroscopically, WR stars are spectacular in appearance: their optical and UV spectra are dominated by strong, broad emission lines instead of the narrow absorption lines that are typical of ‘normal’ stars (Figure 15.3). The emission lines are so strong that they were first noticed as early as 186 ...
Telluric Line Removal in Astrophysical Spectroscopy
... (Vacca, Cushing et al., 2002). A-type stars do not contain many spectral features because of the temperature of the photosphere. They are referred to as having few “metal lines” by astrophysicists. A “metal line” is any spectral feature other than hydrogen. The idea behind this method is that an A-t ...
... (Vacca, Cushing et al., 2002). A-type stars do not contain many spectral features because of the temperature of the photosphere. They are referred to as having few “metal lines” by astrophysicists. A “metal line” is any spectral feature other than hydrogen. The idea behind this method is that an A-t ...
ppt
... In the SNAPP model, the volume each SN would process times the number of SNe occurring in the lifetime of a “giant molecular cloud”, in which complex molecules are thought to be made, is <<< the size of the cloud. But once created, the molecules will replicate, possibly on warmed (more than 20 K) du ...
... In the SNAPP model, the volume each SN would process times the number of SNe occurring in the lifetime of a “giant molecular cloud”, in which complex molecules are thought to be made, is <<< the size of the cloud. But once created, the molecules will replicate, possibly on warmed (more than 20 K) du ...
cranmer_nessc_oct2008
... Angular momentum removal • Many accreting T Tauri stars are slowly rotating, despite the fact that disk accretion adds angular momentum to the star (e.g., ...
... Angular momentum removal • Many accreting T Tauri stars are slowly rotating, despite the fact that disk accretion adds angular momentum to the star (e.g., ...
interactive.hr.diagram
... H-R Diagram Internet Activity Go to the following website to answer the following questions: http://www.wwnorton.com/college/astronomy/astro21/demo/_animations/hr_diagram.swf To receive credit, you must answer in complete sentences! Don’t be afraid to think! 1) What is plotted along the horizontal a ...
... H-R Diagram Internet Activity Go to the following website to answer the following questions: http://www.wwnorton.com/college/astronomy/astro21/demo/_animations/hr_diagram.swf To receive credit, you must answer in complete sentences! Don’t be afraid to think! 1) What is plotted along the horizontal a ...
Nucleosynthesis and Chemical Evolution of Oxygen
... convective core. The star will then contract until the next burning stage begins. Shell burning occurs when the region outside the formerly convective core contracts and heats to the point that the appropriate nuclear fuel can ignite. With these preliminaries in mind, we may trace the star’s evolut ...
... convective core. The star will then contract until the next burning stage begins. Shell burning occurs when the region outside the formerly convective core contracts and heats to the point that the appropriate nuclear fuel can ignite. With these preliminaries in mind, we may trace the star’s evolut ...
Calculating Parallax Lab
... this background? This is because the center of your eyes are a few centimeters apart from each other, so each eye as a different point of view. Because stars are SO far away, their parallaxes are most conveniently measured in seconds of arc (arc seconds). The angular size of your thumb held at arm’s ...
... this background? This is because the center of your eyes are a few centimeters apart from each other, so each eye as a different point of view. Because stars are SO far away, their parallaxes are most conveniently measured in seconds of arc (arc seconds). The angular size of your thumb held at arm’s ...
OGLE-2009-BLG-092/MOA-2009-BLG-137: A Dramatic Repeating
... caustic-induced perturbations at both peaks and thus it is required to consider the finite-source effect to describe deviations occurring when the source approaches and crosses over caustics (Nemiroff & Wickramasin 1994; Witt & Mao 1994; Gould 1994). The finite-source effect is parameterized by the rati ...
... caustic-induced perturbations at both peaks and thus it is required to consider the finite-source effect to describe deviations occurring when the source approaches and crosses over caustics (Nemiroff & Wickramasin 1994; Witt & Mao 1994; Gould 1994). The finite-source effect is parameterized by the rati ...
A Collection of Curricula for the STARLAB Deep Sky Objects
... of the Milky Way Galaxy. (Slides #58 and 59 show photographs of the Milky Way.) The Milky Way is one of many millions (perhaps billions) of galaxies that are part of our universe. Though there are several types of galaxies, many contain all the objects described in this guide. A galaxy is bound toge ...
... of the Milky Way Galaxy. (Slides #58 and 59 show photographs of the Milky Way.) The Milky Way is one of many millions (perhaps billions) of galaxies that are part of our universe. Though there are several types of galaxies, many contain all the objects described in this guide. A galaxy is bound toge ...
Isotopes Tell Origin and Operation of the Sun
... significance of lightweight neon in the solar wind could not be deciphered in 1969, when isotopic anomalies from stellar nuclear reactions and mass fractionation were not resolved, decay products of only two extinct nuclides had been found in meteorites [4, 5], and it was still widely believed that ...
... significance of lightweight neon in the solar wind could not be deciphered in 1969, when isotopic anomalies from stellar nuclear reactions and mass fractionation were not resolved, decay products of only two extinct nuclides had been found in meteorites [4, 5], and it was still widely believed that ...