AST1100 Lecture Notes
... When the hydrogen in the core has been exhausted, the forces of pressure are not any longer strong enough to sustain the forces of gravity. The hydrostatic equilibrium is lost and the core starts contracting. During the core contraction, the temperature in and around the core increases. The tempera ...
... When the hydrogen in the core has been exhausted, the forces of pressure are not any longer strong enough to sustain the forces of gravity. The hydrostatic equilibrium is lost and the core starts contracting. During the core contraction, the temperature in and around the core increases. The tempera ...
a wide-field survey for variable stars
... 4.2.2 Seeing conditions at Mt. Holomon. . . . . . . . . . . . . . . . . . . . . . . 4.2.3 Seeing conditions at Mt. Holomon (cont.). . . . . . . . . . . . . . . . . . . 4.2.4 Seeing conditions at Mt. Holomon (cont.). . . . . . . . . . . . . . . . . . . 4.2.5 Overall Seeing and Isoplanatic angle measu ...
... 4.2.2 Seeing conditions at Mt. Holomon. . . . . . . . . . . . . . . . . . . . . . . 4.2.3 Seeing conditions at Mt. Holomon (cont.). . . . . . . . . . . . . . . . . . . 4.2.4 Seeing conditions at Mt. Holomon (cont.). . . . . . . . . . . . . . . . . . . 4.2.5 Overall Seeing and Isoplanatic angle measu ...
Protostellar/PMS Mass Infall Luminosity Problem
... The observed large scatter of protostellar luminosities is due both to star-to-star differences in the time evolution of the infall rate and to large fluctuations of the infall of individual stars (especially during binary or ...
... The observed large scatter of protostellar luminosities is due both to star-to-star differences in the time evolution of the infall rate and to large fluctuations of the infall of individual stars (especially during binary or ...
Exactly What Is Stellar `Radial Velocity`?
... It may be useful to recall the meaning and typical size of the various terms in Eq. (8). The term containing $ i accounts for the gravitational blueshift due to the potential at the observer, while v 2 includes the transverse Doppler effect from the motion of the observer; each term contributes ~ —3 ...
... It may be useful to recall the meaning and typical size of the various terms in Eq. (8). The term containing $ i accounts for the gravitational blueshift due to the potential at the observer, while v 2 includes the transverse Doppler effect from the motion of the observer; each term contributes ~ —3 ...
100 Binocular Deep Sky Objects
... in a group, but usually 2 objects in a group. Seeing DSOs in groups makes observing that much more enjoyable. Many of these objects are challenging and may not be seen unless observing with large binoculars or in very dark skies. In some cases I discuss what can be seen in various sizes of binocular ...
... in a group, but usually 2 objects in a group. Seeing DSOs in groups makes observing that much more enjoyable. Many of these objects are challenging and may not be seen unless observing with large binoculars or in very dark skies. In some cases I discuss what can be seen in various sizes of binocular ...
Using photometric analysis to determine characteristics of the V
... V‐2491 in the Cygnus constellation as show in figure 2. In order to do so, frames of that particular nova need to be taken over several nights and then analyze as a collective. This section thus deals with not only obtaining these raw CCD images, but also applying t ...
... V‐2491 in the Cygnus constellation as show in figure 2. In order to do so, frames of that particular nova need to be taken over several nights and then analyze as a collective. This section thus deals with not only obtaining these raw CCD images, but also applying t ...
CHAPTER 8 Survey of Solar Systems
... When several planets appear near each other in the evening sky, we can see that they lie along a linear band extending away from the Sun (fig. 8.4). The planets appear to lie along a line because their orbits, as well as the Earth’s, all lie in nearly the same plane, as shown in the side view of the ...
... When several planets appear near each other in the evening sky, we can see that they lie along a linear band extending away from the Sun (fig. 8.4). The planets appear to lie along a line because their orbits, as well as the Earth’s, all lie in nearly the same plane, as shown in the side view of the ...
Labeling the HR Diagram - Mastering Physics Answers
... Consider a relatively nearby, single star, that is, a star that is not a member of a binary system and has no known orbiting planets. Listed below are a few properties of this star. Classify each property as either something that we can observe or measure directly (with the aid of a telescope and in ...
... Consider a relatively nearby, single star, that is, a star that is not a member of a binary system and has no known orbiting planets. Listed below are a few properties of this star. Classify each property as either something that we can observe or measure directly (with the aid of a telescope and in ...
Facilitator`s Guide
... Variable Stars, Type Ia Supernovae The process of “measuring” the stars and the distance to them is a combination of direct measurement, inference and indirect measurement. All direct measurements of stars, and the only measurements that can be made, involve the detection of the energy they emit (ty ...
... Variable Stars, Type Ia Supernovae The process of “measuring” the stars and the distance to them is a combination of direct measurement, inference and indirect measurement. All direct measurements of stars, and the only measurements that can be made, involve the detection of the energy they emit (ty ...
ASTR2050 Spring 2005 •
... Please turn in your homework now! In this class we will cover Telescopes: ...
... Please turn in your homework now! In this class we will cover Telescopes: ...
The Official Magazine of the University Of St Andrews Astronomical Society 1
... The vast majority of exoplanets found have been large gas giants, close to their parent star, with orbital periods of only a few days. Our gas giants, however, are orders of magnitude more distant from the sun than typical exoplanets are from their stars. Why is our Solar system so different to – wh ...
... The vast majority of exoplanets found have been large gas giants, close to their parent star, with orbital periods of only a few days. Our gas giants, however, are orders of magnitude more distant from the sun than typical exoplanets are from their stars. Why is our Solar system so different to – wh ...
Constellation Detection
... before we can use it as a template and quantify the template as data structures for further detection. First, Every single template image is first binarized. We pick different colors to efficiently distinguish stars and connection lines (stars are represented by red and connection lines is represent ...
... before we can use it as a template and quantify the template as data structures for further detection. First, Every single template image is first binarized. We pick different colors to efficiently distinguish stars and connection lines (stars are represented by red and connection lines is represent ...
The formation of the solar system
... pristine group of angrites (achondrites consisting mostly of the mineral augite) is inferred to have differentiated by around 3-5 million years after the CAIs (Larsen et al. 2011, Brennecka & Wadhwa 2012; Kleine et al. 2012). Likewise, achondrite groups such as acapulcuites, eucrites, and winonaites ...
... pristine group of angrites (achondrites consisting mostly of the mineral augite) is inferred to have differentiated by around 3-5 million years after the CAIs (Larsen et al. 2011, Brennecka & Wadhwa 2012; Kleine et al. 2012). Likewise, achondrite groups such as acapulcuites, eucrites, and winonaites ...
Exploring the Universe
... – Hottest stars are blue, coolest are red – Hertzspurg-Russel diagram classifies stars • 90° of stars are called the main sequence • Other stars include red giants, supergiants, and dwarfs ...
... – Hottest stars are blue, coolest are red – Hertzspurg-Russel diagram classifies stars • 90° of stars are called the main sequence • Other stars include red giants, supergiants, and dwarfs ...
PHYS3380_111115_bw - The University of Texas at Dallas
... - required some revisions to models of high mass stellar evolution, which had suggested that supernovae would result from red supergiants. Now believe star was chemically poor in elements heavier than He - contracted and heated up after phase as cool, red supergiant during which it lost much of its ...
... - required some revisions to models of high mass stellar evolution, which had suggested that supernovae would result from red supergiants. Now believe star was chemically poor in elements heavier than He - contracted and heated up after phase as cool, red supergiant during which it lost much of its ...
Adaptive Optics Nicholas Devaney GTC project, Instituto de
... and the field of view. It is not necessary to reconstruct the turbulent layers; ‘only’ need to determine the commands for the deformable mirrors. • Tomography involves taking images with source and detector placed in different orientations. MCAO will employ multiple guide stars for simultaneous wave ...
... and the field of view. It is not necessary to reconstruct the turbulent layers; ‘only’ need to determine the commands for the deformable mirrors. • Tomography involves taking images with source and detector placed in different orientations. MCAO will employ multiple guide stars for simultaneous wave ...
Comet Lulin - indstate.edu
... Since Comet Lulin will be moving opposite the motion of the Earth, it will appear to approach us and move away especially fast. Beginning in February 2009, Comet Lulin will rise at about midnight local time, and will be about 6th or 7th magnitude. This won't be bright enough to go out and look at ...
... Since Comet Lulin will be moving opposite the motion of the Earth, it will appear to approach us and move away especially fast. Beginning in February 2009, Comet Lulin will rise at about midnight local time, and will be about 6th or 7th magnitude. This won't be bright enough to go out and look at ...
(pdf)
... The possibility of observing a toroidal atmosphere in absorption when a giant planet transits the disk of its parent star is determined not only by the amount of material and the dimensions of the cloud, but also by the geometry of the observation. The orbital period of planet HD 209458b is short, 3 ...
... The possibility of observing a toroidal atmosphere in absorption when a giant planet transits the disk of its parent star is determined not only by the amount of material and the dimensions of the cloud, but also by the geometry of the observation. The orbital period of planet HD 209458b is short, 3 ...
March 2016 BRAS Addendum Newsletter
... Sirius (Alpha CMa), “scorching”, “the Dog Star”, mag. -1.46, 06 45 09.25 -16 42 47.3, is a blue-white binary star, and is also the brightest star in the night sky. The companion star, Sirius B (the Pup),is a white dwarf star with a magnitude of 8.4, and has an orbital period of 50 years and a separa ...
... Sirius (Alpha CMa), “scorching”, “the Dog Star”, mag. -1.46, 06 45 09.25 -16 42 47.3, is a blue-white binary star, and is also the brightest star in the night sky. The companion star, Sirius B (the Pup),is a white dwarf star with a magnitude of 8.4, and has an orbital period of 50 years and a separa ...
9J Gravity and Space
... The astrology and mythology of the constellations, especially those of the signs of the zodiac may be enjoyable, but the science behind it isn’t quite the same. Precession: Due to the moon and sun’s pull of gravity, Earth wobbles as it spins. This wobbling is called precession and it's so slow that ...
... The astrology and mythology of the constellations, especially those of the signs of the zodiac may be enjoyable, but the science behind it isn’t quite the same. Precession: Due to the moon and sun’s pull of gravity, Earth wobbles as it spins. This wobbling is called precession and it's so slow that ...