Goal: To understand how to find the brightness of stars and what
... • So, the further away a star is, the dimmer it will appear to be. • Our sun is much closer to us than any other star, so it appears to be very bright. • If you scale the brightness logarithmically, then how bright a star appears to be is its Apparent Magnitude. • But if a star gets 10 time further ...
... • So, the further away a star is, the dimmer it will appear to be. • Our sun is much closer to us than any other star, so it appears to be very bright. • If you scale the brightness logarithmically, then how bright a star appears to be is its Apparent Magnitude. • But if a star gets 10 time further ...
... 1000 years. Therefore, we must ask whether or not it is plausible to find four runaway stars among 44 trapezia. Trapezia may also evolve dynamically in a less violent way, if they start out from a virialized state (Allen et al. 1974b). In this case, the time scale for their dynamical evolution is ab ...
Chemical Evolution
... Elemental Abundances Type II supernovae have progenitors > 8 M and explode on timescales ~ 107 yr, less than typical duration of star formation Main site of -elements, e.g. O, Mg, Ti, Ca, Si Low mass stars enriched by only Type II SNe show enhanced ratio of -elements to iron, with value de ...
... Elemental Abundances Type II supernovae have progenitors > 8 M and explode on timescales ~ 107 yr, less than typical duration of star formation Main site of -elements, e.g. O, Mg, Ti, Ca, Si Low mass stars enriched by only Type II SNe show enhanced ratio of -elements to iron, with value de ...
IYA 2009 - AAVSO Beginner/Intermediate Amateur Astronomer
... you will here hydrogen alpha line mentioned a lot. Since stars are mainly hydrogen and since the hydrogen alpha line is the most prominent line for the element, it gets lots of study. For epsilon Aurigae other hydrogen lines are also of . interest including the beta and gamma lines. The sodium D lin ...
... you will here hydrogen alpha line mentioned a lot. Since stars are mainly hydrogen and since the hydrogen alpha line is the most prominent line for the element, it gets lots of study. For epsilon Aurigae other hydrogen lines are also of . interest including the beta and gamma lines. The sodium D lin ...
Why Spectroscopy?
... you will here hydrogen alpha line mentioned a lot. Since stars are mainly hydrogen and since the hydrogen alpha line is the most prominent line for the element, it gets lots of study. For epsilon Aurigae other hydrogen lines are also of . interest including the beta and gamma lines. The sodium D lin ...
... you will here hydrogen alpha line mentioned a lot. Since stars are mainly hydrogen and since the hydrogen alpha line is the most prominent line for the element, it gets lots of study. For epsilon Aurigae other hydrogen lines are also of . interest including the beta and gamma lines. The sodium D lin ...
Our Local Group of Galaxies
... The Sgr dSph has proved to be a very interesting object - has 4, perhaps 6+, globular clusters of its own, and is currently being disrupted by the tidal field of the Galaxy. Sgr stars are spread over a large part of the sky, tracing out the orbit. See Law & Majewski 2010 ApJ 714 229 and refs ...
... The Sgr dSph has proved to be a very interesting object - has 4, perhaps 6+, globular clusters of its own, and is currently being disrupted by the tidal field of the Galaxy. Sgr stars are spread over a large part of the sky, tracing out the orbit. See Law & Majewski 2010 ApJ 714 229 and refs ...
ASTR-100 - Jiri Brezina Teaching
... Looking ‘down’ on the Earth’s North Pole, both its axial rotation and revolution (orbiting) are counterclockwise (ccw). This is termed direct rotation, while the word retrograde is applied to the rotation if opposite to the revolution. Objects with retrograde rotation have inclination to orbit great ...
... Looking ‘down’ on the Earth’s North Pole, both its axial rotation and revolution (orbiting) are counterclockwise (ccw). This is termed direct rotation, while the word retrograde is applied to the rotation if opposite to the revolution. Objects with retrograde rotation have inclination to orbit great ...
Homework #9 (Ch. 21)
... 9. Chaisson Review and Discussion 21.11 What evidence is there that many supernovae have occurred in our Galaxy? 10. Chaisson Review and Discussion 21.13 What proof do astronomers have that heavy elements are formed in stars? 11. Chaisson Review and Discussion 21.16 How are nuclei heavier than iron ...
... 9. Chaisson Review and Discussion 21.11 What evidence is there that many supernovae have occurred in our Galaxy? 10. Chaisson Review and Discussion 21.13 What proof do astronomers have that heavy elements are formed in stars? 11. Chaisson Review and Discussion 21.16 How are nuclei heavier than iron ...
Lecture 1 - Simon P Driver
... • The GAMA9hr field is at RA=9h and Dec=0o, es1mate: – When would be the best date to observe this field? – If observed from the Anglo-‐Australian Telescope, how long would this object be at more ...
... • The GAMA9hr field is at RA=9h and Dec=0o, es1mate: – When would be the best date to observe this field? – If observed from the Anglo-‐Australian Telescope, how long would this object be at more ...
Observing the Night Sky - Constellations
... small cross-bar on the North to South pipe representing the celestial meridian. This cross-bar locates the north celestial pole, and Polaris should be very close to it. Looking in the opposite direction you should be able to identify the pipe representing the celestial equator. Note that every 10° o ...
... small cross-bar on the North to South pipe representing the celestial meridian. This cross-bar locates the north celestial pole, and Polaris should be very close to it. Looking in the opposite direction you should be able to identify the pipe representing the celestial equator. Note that every 10° o ...
galaxy solar system supernova
... light travels in one year, which is nearly six trillion miles. 2. A light-year is the unit of measure used to calculate the distance from Earth to stars in space. 3. A light-year is not a unit of time. ...
... light travels in one year, which is nearly six trillion miles. 2. A light-year is the unit of measure used to calculate the distance from Earth to stars in space. 3. A light-year is not a unit of time. ...
Measuring the Milky Way
... strong magnetic fields; a rotating ring or disk of matter a few parsecs across; and a strong X-ray source at the center ...
... strong magnetic fields; a rotating ring or disk of matter a few parsecs across; and a strong X-ray source at the center ...
Mass extinctions and supernova explosions
... measurements, he found that background radioactivity increases with rising altitude. In 1936 he received the Nobel prize for his discovery. It took 22 years until work by W.Baade and F. Zwicky “(W.Baade and F. Zwicky, 1934)” indicated that fluctuations in cosmic ray intensity can be caused by supern ...
... measurements, he found that background radioactivity increases with rising altitude. In 1936 he received the Nobel prize for his discovery. It took 22 years until work by W.Baade and F. Zwicky “(W.Baade and F. Zwicky, 1934)” indicated that fluctuations in cosmic ray intensity can be caused by supern ...
An Analysis of the Behavior of Vela X-1
... – Occurs suddenly without a transition phase (almost like a switch) – Not an eclipse but count rate drops to below detection limits, almost 0. ...
... – Occurs suddenly without a transition phase (almost like a switch) – Not an eclipse but count rate drops to below detection limits, almost 0. ...
File - the ridgeway ASTRONOMY page
... and because some of the atoms will be moving away from the observer and some moving towards, the overall effect will contain both blue-shift and red-shift components. ...
... and because some of the atoms will be moving away from the observer and some moving towards, the overall effect will contain both blue-shift and red-shift components. ...
A prevalence of dynamo-generated magnetic fields in the
... radiative–convective boundary because those fields would be outside the core and could not cause mode suppression when the star evolves into a red giant. Turning to higher masses we see that, for a given νmax, stars above 1.4M" require increasingly strong magnetic fields to suppress their dipolar mo ...
... radiative–convective boundary because those fields would be outside the core and could not cause mode suppression when the star evolves into a red giant. Turning to higher masses we see that, for a given νmax, stars above 1.4M" require increasingly strong magnetic fields to suppress their dipolar mo ...
Photoelectric Photometry of the Pleiades Student Manual
... The computer program you will use is a realistic simulation of a UBV photometer attached to a moderate sized research telescope. The telescope is controlled by a computer that allows you to move from star to star and make measurements. Different filters can be selected for each observation, and the ...
... The computer program you will use is a realistic simulation of a UBV photometer attached to a moderate sized research telescope. The telescope is controlled by a computer that allows you to move from star to star and make measurements. Different filters can be selected for each observation, and the ...
Stargazer - Everett Astronomical Society
... In addition you will be able subscribe to Sky and Telescope for $7 off the normal subscription rate, contact the treasurer (Carol Gore) for more information. http://everettastro.org/application.htm (When renewing your subscription to Sky & Telescope you should send your S&T renewal form along with a ...
... In addition you will be able subscribe to Sky and Telescope for $7 off the normal subscription rate, contact the treasurer (Carol Gore) for more information. http://everettastro.org/application.htm (When renewing your subscription to Sky & Telescope you should send your S&T renewal form along with a ...
October 2012 - astronomy for beginners
... better fun to watch for meteors with a friend or friends. This also helps because a larger proportion of the sky can be covered. Members of a group could also take turns making notes of where the meteor occurred and how bright it appeared. ...
... better fun to watch for meteors with a friend or friends. This also helps because a larger proportion of the sky can be covered. Members of a group could also take turns making notes of where the meteor occurred and how bright it appeared. ...
test - Scioly.org
... c) When and what was the peak effective temperature of the central star observed? (2 points) 32) Which DSO is represented in Image K? (6 points) a) The larger star in this binary system releases ____ times as much energy as our Sun. b) When was the companion star first predicted, and by whom was it ...
... c) When and what was the peak effective temperature of the central star observed? (2 points) 32) Which DSO is represented in Image K? (6 points) a) The larger star in this binary system releases ____ times as much energy as our Sun. b) When was the companion star first predicted, and by whom was it ...
A Theory of the Origin of the Solar System There have been
... with its few brother stars might have been formed by the same course of evolution and at some stage might be revolving in coplaner and nearly circular orbits around their parent body just as the planets move round the Sun and the satellites round the planets. If this is true, then the solar nebula m ...
... with its few brother stars might have been formed by the same course of evolution and at some stage might be revolving in coplaner and nearly circular orbits around their parent body just as the planets move round the Sun and the satellites round the planets. If this is true, then the solar nebula m ...
Name: Period:______ Date:______ Astronomy Vocabulary DUE
... and moon are in a straight line. Occurs during new and full moon phases. ...
... and moon are in a straight line. Occurs during new and full moon phases. ...
IK Pegasi
IK Pegasi (or HR 8210) is a binary star system in the constellation Pegasus. It is just luminous enough to be seen with the unaided eye, at a distance of about 150 light years from the Solar System.The primary (IK Pegasi A) is an A-type main-sequence star that displays minor pulsations in luminosity. It is categorized as a Delta Scuti variable star and it has a periodic cycle of luminosity variation that repeats itself about 22.9 times per day. Its companion (IK Pegasi B) is a massive white dwarf—a star that has evolved past the main sequence and is no longer generating energy through nuclear fusion. They orbit each other every 21.7 days with an average separation of about 31 million kilometres, or 19 million miles, or 0.21 astronomical units (AU). This is smaller than the orbit of Mercury around the Sun.IK Pegasi B is the nearest known supernova progenitor candidate. When the primary begins to evolve into a red giant, it is expected to grow to a radius where the white dwarf can accrete matter from the expanded gaseous envelope. When the white dwarf approaches the Chandrasekhar limit of 1.44 solar masses (M☉), it may explode as a Type Ia supernova.