homework assignment 2
... yourselves and figure out some way of communicating with each other outside of class so that all of the group knows who is doing what over the next week. Elect a secretary/recorder, who will list all the group members’ names on a sheet of paper. Look over the list of statements below and choose thre ...
... yourselves and figure out some way of communicating with each other outside of class so that all of the group knows who is doing what over the next week. Elect a secretary/recorder, who will list all the group members’ names on a sheet of paper. Look over the list of statements below and choose thre ...
what`s up this month – april 2017
... the middle ages the Virgin was often associated with the Virgin Mary. Spica is the brightest star in the constellation of Virgo and the 16 th brightest star in the night sky. Analysis of its parallax shows that it is located 250 light years from the Sun. It is a spectroscopic binary and rotating ell ...
... the middle ages the Virgin was often associated with the Virgin Mary. Spica is the brightest star in the constellation of Virgo and the 16 th brightest star in the night sky. Analysis of its parallax shows that it is located 250 light years from the Sun. It is a spectroscopic binary and rotating ell ...
First firm spectral classification of an early-B pre-main
... et al. 2011). A (K-band) spectrum has been obtained for only a few of these (Hanson et al. 1997, 2002; Bik et al. 2006), and they show a red continuum, likely due to hot dust, and an emission-line spectrum that includes Brγ and, often, CO 2.3 μm bandhead emission. The latter emission can be modeled ...
... et al. 2011). A (K-band) spectrum has been obtained for only a few of these (Hanson et al. 1997, 2002; Bik et al. 2006), and they show a red continuum, likely due to hot dust, and an emission-line spectrum that includes Brγ and, often, CO 2.3 μm bandhead emission. The latter emission can be modeled ...
Micro_lect20a
... • Core collapse stops, neutron star is formed • Rest of the star collapses in on the core, but bounces off the new neutron star (also pushed outwards by the neutrinos) ...
... • Core collapse stops, neutron star is formed • Rest of the star collapses in on the core, but bounces off the new neutron star (also pushed outwards by the neutrinos) ...
PSF - ESO
... After the starting guesses of the centroids (FIND) and brightness (PHOTOMETRY) are measured, and the PSF model determined (PSF), the PSF is first shifted and scaled to the position and brightness of each star, and each profile is subtracted, out to the profile radius, from the original image. This ...
... After the starting guesses of the centroids (FIND) and brightness (PHOTOMETRY) are measured, and the PSF model determined (PSF), the PSF is first shifted and scaled to the position and brightness of each star, and each profile is subtracted, out to the profile radius, from the original image. This ...
Article Reference - Archive ouverte UNIGE
... are located in Table 1. The mass function f(m) and the log gp are directly obtained from fitting the data. They indicate we have discovered a new transiting planet. Using the stellar mass we obtain a mass and radius for our object and find 0.55 ± 0.04 Mjup and 0.95 ± 0.03 Rjup . The Rossiter-McLaugh ...
... are located in Table 1. The mass function f(m) and the log gp are directly obtained from fitting the data. They indicate we have discovered a new transiting planet. Using the stellar mass we obtain a mass and radius for our object and find 0.55 ± 0.04 Mjup and 0.95 ± 0.03 Rjup . The Rossiter-McLaugh ...
Galaxies
... – Suppose that the universe is (1) static, (2) infinite, (3) eternal and (4) uniformly filled with stars; – If we look in any direction, our line of sight must eventually run into a star; – Therefore, the night sky should be as bright as the average star and certainly should not be dark! ...
... – Suppose that the universe is (1) static, (2) infinite, (3) eternal and (4) uniformly filled with stars; – If we look in any direction, our line of sight must eventually run into a star; – Therefore, the night sky should be as bright as the average star and certainly should not be dark! ...
SUMMARY White dwarfs, neutron stars, and black holes are the
... in an accretion disk. What type of photons have this wavelength? 10. (15.1–15.3) You observe a main sequence K0type star that moves as if it is in a binary system, but no companion is visible. If the period of the system is 34 days and the semimajor axis is 0.5 AU, what is the mass of the system (r ...
... in an accretion disk. What type of photons have this wavelength? 10. (15.1–15.3) You observe a main sequence K0type star that moves as if it is in a binary system, but no companion is visible. If the period of the system is 34 days and the semimajor axis is 0.5 AU, what is the mass of the system (r ...
Assignment 1
... Hipparcos was a space-astrometry mission that measured the parallax angle of 2.5 million stars. In this exercise, we will query the Hipparcos catalog, edit the data into a format suitable for input to a spreadsheet, then use the data to study the distribution of absolute magnitudes M for approximate ...
... Hipparcos was a space-astrometry mission that measured the parallax angle of 2.5 million stars. In this exercise, we will query the Hipparcos catalog, edit the data into a format suitable for input to a spreadsheet, then use the data to study the distribution of absolute magnitudes M for approximate ...
Life as a Low Mass Red Giant
... – As core temperature rises, fusion rate rises, so luminosity increases somewhat. – This is very important for understanding origin of life on earth. Sun's luminosity has grown at least 50% since birth of Earth. Planetary scientists having difficult time understanding why Earth was not in permanent ...
... – As core temperature rises, fusion rate rises, so luminosity increases somewhat. – This is very important for understanding origin of life on earth. Sun's luminosity has grown at least 50% since birth of Earth. Planetary scientists having difficult time understanding why Earth was not in permanent ...
Notes
... Hydrogen layer thins further from mass loss and He burning shell Star evolves at constant luminosity (~104LSun), shrinking and heating up, until nuclear burning ceases Masses between 0.55 and 1+ solar masses (more massive are brighter) Outflowing winds seen in “P Cygni” profiles Hydrogen abundance l ...
... Hydrogen layer thins further from mass loss and He burning shell Star evolves at constant luminosity (~104LSun), shrinking and heating up, until nuclear burning ceases Masses between 0.55 and 1+ solar masses (more massive are brighter) Outflowing winds seen in “P Cygni” profiles Hydrogen abundance l ...
B LOG - Science Centre
... 1) Castor – a multiple star, made up of 6 tightly grouped stars. Most telescope can see two white stars and a smaller red dwarf star. 2) M35 –a large open cluster of over 200 stars arranged in curved chains, 2800 lightyears away. Best viewed in binoculars or telescopes using low magnification. ...
... 1) Castor – a multiple star, made up of 6 tightly grouped stars. Most telescope can see two white stars and a smaller red dwarf star. 2) M35 –a large open cluster of over 200 stars arranged in curved chains, 2800 lightyears away. Best viewed in binoculars or telescopes using low magnification. ...
The Milky Way - TCNJ | The College of New Jersey
... This can be used with any galaxy for which motions can be measured. Mass vs. Distance Applet ...
... This can be used with any galaxy for which motions can be measured. Mass vs. Distance Applet ...
STARS
... Lets use the sun, our nearest star as an example. It is a self luminous, gaseous sphere. It has no solid surface. Its size is about 100 times the Earth and its mass is about 300,000 times that of the Earth. Its core temperature is 27 million degrees Fahrenheit and its visible surface is 10,000 degr ...
... Lets use the sun, our nearest star as an example. It is a self luminous, gaseous sphere. It has no solid surface. Its size is about 100 times the Earth and its mass is about 300,000 times that of the Earth. Its core temperature is 27 million degrees Fahrenheit and its visible surface is 10,000 degr ...
Word doc - UC-HiPACC - University of California, Santa Cruz
... telescopes both on the ground and in space. Exultant astronomers worldwide captured data at visible, X-ray, gammaray, and radio wavelengths from telescopes both on the ground and in space. Three independent RAPTOR (Rapid Telescopes for Optical Response) full-sky monitoring telescopes—two in New Mexi ...
... telescopes both on the ground and in space. Exultant astronomers worldwide captured data at visible, X-ray, gammaray, and radio wavelengths from telescopes both on the ground and in space. Three independent RAPTOR (Rapid Telescopes for Optical Response) full-sky monitoring telescopes—two in New Mexi ...
Build your own Galaxy - McDonald Observatory
... Some of the materials represent major characteristics of our galaxy: Central bulge: the cotton-ball dome.The rounded structure in the central 6,400 lightyears of the galaxy’s center is what astronomers call the bulge of our galaxy. Disk: foam batting on the poster board. The disk of stars in our ga ...
... Some of the materials represent major characteristics of our galaxy: Central bulge: the cotton-ball dome.The rounded structure in the central 6,400 lightyears of the galaxy’s center is what astronomers call the bulge of our galaxy. Disk: foam batting on the poster board. The disk of stars in our ga ...
DSLR Photometry
... required, if you are using high quality lenses, provided the target star and comparison are in or near the center of the field of view. ...
... required, if you are using high quality lenses, provided the target star and comparison are in or near the center of the field of view. ...
(Mike Riddle CTI)-84_eng_cr_v4.0
... Ph.D. Astronomy Ph.D. Astronomy Ph.D. Astronomy Ph.D. Astrophysics Ph.D. Astrophysics Ph.D. Mathematical Physics Ph.D. Condensed Matter Physics Ph.D. Physics Ph.D. Physics Ph.D. Physics Ph.D. Physics Ph.D. Nuclear Physics Ph.D. Physics Ph.D. Aeronautics Ph.D. Combustion Theory Ph.D. Nuclear Engineer ...
... Ph.D. Astronomy Ph.D. Astronomy Ph.D. Astronomy Ph.D. Astrophysics Ph.D. Astrophysics Ph.D. Mathematical Physics Ph.D. Condensed Matter Physics Ph.D. Physics Ph.D. Physics Ph.D. Physics Ph.D. Physics Ph.D. Nuclear Physics Ph.D. Physics Ph.D. Aeronautics Ph.D. Combustion Theory Ph.D. Nuclear Engineer ...
In This Issue The Hottest Planet in the Solar System President`s Article
... thanks to our atmosphere that's some 140 times thicker than that of Mars. Our average surface temperature is 57 °F (14 °C), and dayto-night temperature swings are only tens of degrees. But if our world were completely airless, like Mercury, we'd have day-to-night temperature swings that were hundred ...
... thanks to our atmosphere that's some 140 times thicker than that of Mars. Our average surface temperature is 57 °F (14 °C), and dayto-night temperature swings are only tens of degrees. But if our world were completely airless, like Mercury, we'd have day-to-night temperature swings that were hundred ...
Tips on taking Astro sights
... stars 90° apart in azimuth, because any abnormal refraction error will be eliminated by using opposite horizons. Stars should be selected with altitudes between 300 and 60° and, where possible, with approximately the same altitude. At least four additional stars should also be selected as standbys, ...
... stars 90° apart in azimuth, because any abnormal refraction error will be eliminated by using opposite horizons. Stars should be selected with altitudes between 300 and 60° and, where possible, with approximately the same altitude. At least four additional stars should also be selected as standbys, ...
US - Real Science
... swallowed a small companion in its past. So what caused the asymmetry and the stellar baby boom? Most of the star formation is taking place in dense gassy regions scattered around the arms. But astronomers simply do not know what is compressing this gas so much that stars are forming at a staggerin ...
... swallowed a small companion in its past. So what caused the asymmetry and the stellar baby boom? Most of the star formation is taking place in dense gassy regions scattered around the arms. But astronomers simply do not know what is compressing this gas so much that stars are forming at a staggerin ...
Perseus (constellation)
Perseus, named after the Greek mythological hero Perseus, is a constellation in the northern sky. It was one of 48 listed by the 2nd-century astronomer Ptolemy and among the 88 modern constellations defined by the International Astronomical Union (IAU). It is located in the northern celestial hemisphere near several other constellations named after legends surrounding Perseus, including Andromeda to the west and Cassiopeia to the north. Perseus is also bordered by Aries and Taurus to the south, Auriga to the east, Camelopardalis to the north, and Triangulum to the west.The galactic plane of the Milky Way passes through Perseus but is mostly obscured by molecular clouds. The constellation's brightest star is the yellow-white supergiant Alpha Persei (also called Mirfak), which shines at magnitude 1.79. It and many of the surrounding stars are members of an open cluster known as the Alpha Persei Cluster. The best-known star, however, is Algol (Beta Persei), linked with ominous legends because of its variability, which is noticeable to the naked eye. Rather than being an intrinsically variable star, it is an eclipsing binary. Other notable star systems in Perseus include X Persei, a binary system containing a neutron star, and GK Persei, a nova that peaked at magnitude 0.2 in 1901. The Double Cluster, comprising two open clusters quite near each other in the sky, was known to the ancient Chinese. The constellation gives its name to the Perseus Cluster (Abell 426), a massive galaxy cluster located 250 million light-years from Earth. It hosts the radiant of the annual Perseids meteor shower—one of the most prominent meteor showers in the sky.