Astronomy 111 Review Problems Solutions
... change in the observed magnitude of the star does this transit cause? Does the magnitude of the star increase or decrease during the transit? Note that we need to consider a distant viewer. In this case, the angular diameters will not depend on the distance of the planet from the star, only on the ...
... change in the observed magnitude of the star does this transit cause? Does the magnitude of the star increase or decrease during the transit? Note that we need to consider a distant viewer. In this case, the angular diameters will not depend on the distance of the planet from the star, only on the ...
Astrometry
... • Different dependence on orbital separation than radial velocity method - astrometric planet searches are more sensitive at large orbital distance, a • Explicit dependence on d (distance to the star). radial velocity measurements not explicitely sensitive to stellar distance, but practically more ...
... • Different dependence on orbital separation than radial velocity method - astrometric planet searches are more sensitive at large orbital distance, a • Explicit dependence on d (distance to the star). radial velocity measurements not explicitely sensitive to stellar distance, but practically more ...
PH709-assn - University of Kent
... Estimate the change in magnitude during a transit (Rsun = 7.0 × 108 m) ...
... Estimate the change in magnitude during a transit (Rsun = 7.0 × 108 m) ...
Measuring the Properties of Stars
... dependancy on two properties of a star; it’s surface size (4R2) and its surface temperature (T). These are direct relationships. An increase in either of the properties, results in an increase in Luminosity. The MKSA (metric system) unit for luminosity is the same as that for the power unit of ligh ...
... dependancy on two properties of a star; it’s surface size (4R2) and its surface temperature (T). These are direct relationships. An increase in either of the properties, results in an increase in Luminosity. The MKSA (metric system) unit for luminosity is the same as that for the power unit of ligh ...
Lecture 34. Extrasolar Planets.
... Observes the wobble in nearby stars against a backdrop of distant stars. Wobble caused by orbiting around the COM. The wobble is extremely small - very difficult to detect. Requires very sensitive instruments and way to diminish atmospheric effects. ...
... Observes the wobble in nearby stars against a backdrop of distant stars. Wobble caused by orbiting around the COM. The wobble is extremely small - very difficult to detect. Requires very sensitive instruments and way to diminish atmospheric effects. ...
No Slide Title
... must be either close to us or far from each other. Long orbital periods indicate they are far from ...
... must be either close to us or far from each other. Long orbital periods indicate they are far from ...
Detecting Extra Solar Planets
... of these have more than one, so a total of 380 planets have been discovered as of today. Over 90% of these have been discovered using the Doppler effect. The rest were found using either astrometry (wobbles), or transits (periodic changes in stellar brightness). You can keep up with the current extr ...
... of these have more than one, so a total of 380 planets have been discovered as of today. Over 90% of these have been discovered using the Doppler effect. The rest were found using either astrometry (wobbles), or transits (periodic changes in stellar brightness). You can keep up with the current extr ...
Problem set 3 solution
... d) Radii Assuming the orbital separation is much larger than the stellar radii, and that the orbits are circular, we can treat the velocity of the stars during eclipse as completely in the plane of the sky. For circular orbits, the maximum radial velocities given are the constant velocities througho ...
... d) Radii Assuming the orbital separation is much larger than the stellar radii, and that the orbits are circular, we can treat the velocity of the stars during eclipse as completely in the plane of the sky. For circular orbits, the maximum radial velocities given are the constant velocities througho ...
Prospecting for Planets – Radial Velocity Searches
... exoplanet’s physical characteristics like its atmosphere or composition. In addition, RV methods are inherently limited by current survey’s duration; for a good detection, we need an exoplanet to have made at least one orbit of its host. This restricts the planet-star separation that can be detected ...
... exoplanet’s physical characteristics like its atmosphere or composition. In addition, RV methods are inherently limited by current survey’s duration; for a good detection, we need an exoplanet to have made at least one orbit of its host. This restricts the planet-star separation that can be detected ...
Deep Sky Objects (Word)
... mass of the planet and how does it compare to Jupiter? 17. WASP-18 has a temperature of 6370 K and a radius of 1.2 solar radii. How does the total luminosity of WASP-18 compare in brightness to the Sun? What is the difference in absolute magnitude between this star and the Sun? (The Sun has a surfac ...
... mass of the planet and how does it compare to Jupiter? 17. WASP-18 has a temperature of 6370 K and a radius of 1.2 solar radii. How does the total luminosity of WASP-18 compare in brightness to the Sun? What is the difference in absolute magnitude between this star and the Sun? (The Sun has a surfac ...
Habitability - Department of Physics and Astronomy
... – Several stars in our galaxy with planets the size of Jupiter within terrestrial zone from their sun – Mass of star • Larger mass, greater luminosity, shorter life • Most abundant stars in galaxy are least luminous and longest-lived (red dwarfs) ...
... – Several stars in our galaxy with planets the size of Jupiter within terrestrial zone from their sun – Mass of star • Larger mass, greater luminosity, shorter life • Most abundant stars in galaxy are least luminous and longest-lived (red dwarfs) ...
Habitability: Good, Bad and the Ugly
... – Several stars in our galaxy with planets the size of Jupiter within terrestrial zone from their sun – Mass of star • Larger mass, greater luminosity, shorter life • Most abundant stars in galaxy are least luminous and longest-lived (red dwarfs) ...
... – Several stars in our galaxy with planets the size of Jupiter within terrestrial zone from their sun – Mass of star • Larger mass, greater luminosity, shorter life • Most abundant stars in galaxy are least luminous and longest-lived (red dwarfs) ...
Part 1 Notes on Stars - Department of Physics and Astronomy
... – Several stars in our galaxy with planets the size of Jupiter within terrestrial zone from their sun – Mass of star • Larger mass, greater luminosity, shorter life • Most abundant stars in galaxy are least luminous and longest-lived (red dwarfs) ...
... – Several stars in our galaxy with planets the size of Jupiter within terrestrial zone from their sun – Mass of star • Larger mass, greater luminosity, shorter life • Most abundant stars in galaxy are least luminous and longest-lived (red dwarfs) ...
Student notes part 1
... Orbits red dwarf star every 13 days Roughly Circular orbit Within habitable zone of its star Environment suitable for stable liquid H20 on surface (temperature between freezing and boiling points) Found with an Earth based telescope (in Chile) 20.3 light years away ...
... Orbits red dwarf star every 13 days Roughly Circular orbit Within habitable zone of its star Environment suitable for stable liquid H20 on surface (temperature between freezing and boiling points) Found with an Earth based telescope (in Chile) 20.3 light years away ...
Lecture 19 – Detection of Extrasolar Planets
... • When the lensing star passes in front of the source star, the light from the source star is amplified by a factor of as much as 10-20 • The typical duration of a microlensing event is minutes to hours http://www.nasa.gov/topics/universe/features/planet20110518-video.html ...
... • When the lensing star passes in front of the source star, the light from the source star is amplified by a factor of as much as 10-20 • The typical duration of a microlensing event is minutes to hours http://www.nasa.gov/topics/universe/features/planet20110518-video.html ...
PLANETS BEYOND OUR SOLAR SYSTEM By William Reville
... Francisco State University reanalysed their data after the Swiss announcement and uncovered evidence of several new planets. By the end of 1996 astronomers had identified 6 new planets, all of them orbiting stars similar to our sun. Almost all the extra-solar planets so far discovered are at least a ...
... Francisco State University reanalysed their data after the Swiss announcement and uncovered evidence of several new planets. By the end of 1996 astronomers had identified 6 new planets, all of them orbiting stars similar to our sun. Almost all the extra-solar planets so far discovered are at least a ...
Extrasolar Planets
... velocity, the mass of the star and the star’s observed maximum velocity, K The estimated mass is only a lower limit for the mass because the orbital inclination i is unknown and cannot be determined from the Earth. The planet’s mass may be larger. ...
... velocity, the mass of the star and the star’s observed maximum velocity, K The estimated mass is only a lower limit for the mass because the orbital inclination i is unknown and cannot be determined from the Earth. The planet’s mass may be larger. ...
doc - EU-HOU
... You will fit your measurements by hand. In order to do this, iteratively change the 3 parameters W, T and Phi ( checking the fit (the red points and curve superimposed on the blue points) by eye after each iteration. It is also possible to find the best fit by minimising the “solver” value1 displ ...
... You will fit your measurements by hand. In order to do this, iteratively change the 3 parameters W, T and Phi ( checking the fit (the red points and curve superimposed on the blue points) by eye after each iteration. It is also possible to find the best fit by minimising the “solver” value1 displ ...
lec03_05oct2009
... velocity signature is distance independent (S/N is not!) First (written) proposal by Otto Struve, The ...
... velocity signature is distance independent (S/N is not!) First (written) proposal by Otto Struve, The ...
Habitability: Good, Bad and the Ugly
... – Several stars in our galaxy with planets the size of Jupiter within terrestrial zone from their sun – Mass of star • Larger mass, greater luminosity, shorter life • Most abundant stars in galaxy are least luminous and longest-lived (red dwarfs) ...
... – Several stars in our galaxy with planets the size of Jupiter within terrestrial zone from their sun – Mass of star • Larger mass, greater luminosity, shorter life • Most abundant stars in galaxy are least luminous and longest-lived (red dwarfs) ...
Bringing E.T. into Your Classroom The Search for
... The Earth is a pinhead about 15 meters away and Jupiter is a marble 80 meters away and The nearest star to our solar system is on the East coast………….so You are trying to find a pinhead on a grapefruit about 2500 miles away plus the star is a billion times brighter than its planets ...
... The Earth is a pinhead about 15 meters away and Jupiter is a marble 80 meters away and The nearest star to our solar system is on the East coast………….so You are trying to find a pinhead on a grapefruit about 2500 miles away plus the star is a billion times brighter than its planets ...
15 Aug 2009
... sun) discovery. Since all other stars can be seen only as a single point of light, even the discovery of a single such planet is an awsome feat. The first exoplanet was discovered in 1995, and 340 are now known. Encouragingly for those of us who would be thrilled to find that the universe is filled ...
... sun) discovery. Since all other stars can be seen only as a single point of light, even the discovery of a single such planet is an awsome feat. The first exoplanet was discovered in 1995, and 340 are now known. Encouragingly for those of us who would be thrilled to find that the universe is filled ...
Extrasolar planets
... • Lots of planets (>500!) have been detected, all in the last 10-15 years • For most of these, we don’t know what the planets are made of, but for the few we can tell, they are probably gas planets like Jupiter • At least, until this week …. ...
... • Lots of planets (>500!) have been detected, all in the last 10-15 years • For most of these, we don’t know what the planets are made of, but for the few we can tell, they are probably gas planets like Jupiter • At least, until this week …. ...
Tau Ceti
Tau Ceti (τ Cet, τ Ceti) is a star in the constellation Cetus that is spectrally similar to the Sun, although it has only about 78% of the Sun's mass. At a distance of just under 12 light-years from the Solar System, it is a relatively nearby star, and is the closest solitary G-class star. The star appears stable, with little stellar variation, and is metal-deficient.Observations have detected more than ten times as much dust surrounding Tau Ceti as is present in the Solar System. Since December 2012, there has been evidence of possibly five planets orbiting Tau Ceti, with two of these being potentially in the habitable zone. Because of its debris disk, any planet orbiting Tau Ceti would face far more impact events than Earth. Despite this hurdle to habitability, its solar analog (Sun-like) characteristics have led to widespread interest in the star. Given its stability, similarity and relative proximity to the Sun, Tau Ceti is consistently listed as a target for the Search for Extra-Terrestrial Intelligence (SETI), and it appears in some science fiction literature.It can be seen with the unaided eye as a third-magnitude star. As seen from Tau Ceti, the Sun would be a third-magnitude star in the constellation Boötes.