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Part 2 of Our Lecture
... WTTS (green) CTTS (red) HD 206267 (blue) in Tr37 High- and intermediate-mass stars (open stars) ...
... WTTS (green) CTTS (red) HD 206267 (blue) in Tr37 High- and intermediate-mass stars (open stars) ...
The Early Evolution of Protostars
... The key is to have a large, uniform sample “Blind” surveys at range of wavelengths Complete coverage of the SED ...
... The key is to have a large, uniform sample “Blind” surveys at range of wavelengths Complete coverage of the SED ...
Two obvious differences between the exoplanets and the giant
... It stares at the same star field for the entire mission and continuously and simultaneously monitors the brightnesses of more than 100,000 stars for the life of the mission—3.5 years. The diameter of the telescope needs to be large enough to reduce the noise from photon counting statistics, so that ...
... It stares at the same star field for the entire mission and continuously and simultaneously monitors the brightnesses of more than 100,000 stars for the life of the mission—3.5 years. The diameter of the telescope needs to be large enough to reduce the noise from photon counting statistics, so that ...
Galactic Star Formation Science with Integral Field
... Emission, seen in scattered light images of T Tauri stars Gas in Circumstellar Disks – As much as 99% of the mass in circumstellar disks is in GAS not DUST Disk Gas is traced by: • mm molecular observations of cold outer disk gas • IR emission species trace warm gas from ~terrestrial regions of disk ...
... Emission, seen in scattered light images of T Tauri stars Gas in Circumstellar Disks – As much as 99% of the mass in circumstellar disks is in GAS not DUST Disk Gas is traced by: • mm molecular observations of cold outer disk gas • IR emission species trace warm gas from ~terrestrial regions of disk ...
NASA`s Kepler Discovers Its Smallest `Habitable Zone` Planets to
... discovery of these rocky planets in the habitable zone brings us a bit closer to finding a place like home. It is only a matter of time before we know if the galaxy is home to a multitude of planets like Earth, or if we are a rarity." The Kepler space telescope, which simultaneously and continuously ...
... discovery of these rocky planets in the habitable zone brings us a bit closer to finding a place like home. It is only a matter of time before we know if the galaxy is home to a multitude of planets like Earth, or if we are a rarity." The Kepler space telescope, which simultaneously and continuously ...
Extrasolar planets - Harvard University
... Yes indeed — there’s no reason to think that our Solar System is special in any way; and equally, we are beginning to realize that there is a great diversity of planetary types not represented in our own backyard (Fig. 3). Since early 2007, for example, we have spotted at least three planets orbitin ...
... Yes indeed — there’s no reason to think that our Solar System is special in any way; and equally, we are beginning to realize that there is a great diversity of planetary types not represented in our own backyard (Fig. 3). Since early 2007, for example, we have spotted at least three planets orbitin ...
BAS Visit to the Norman Lockyer Observatory, October 2015
... Mira variables. There are between 6,000 to 7,000 known stars belonging to this group. They are all red giants whose surfaces oscillate in such a way as to cause variations in brightness over periods ranging from 80 to 1,000 days. Mira was the first non-supernova variable star discovered, and is beli ...
... Mira variables. There are between 6,000 to 7,000 known stars belonging to this group. They are all red giants whose surfaces oscillate in such a way as to cause variations in brightness over periods ranging from 80 to 1,000 days. Mira was the first non-supernova variable star discovered, and is beli ...
What stellar properties can be learnt from planetary transits?
... sizes of 3-6 104 km, being larger than regular sunspots, usually of the order of 11000 km (probably a group of starspots, similar to solar active regions). temperatures of 4900 - 5500 K, being hotter than regular sunspots (3800-4400K), however the surface temperature of HD 209458, 6000K, is also ...
... sizes of 3-6 104 km, being larger than regular sunspots, usually of the order of 11000 km (probably a group of starspots, similar to solar active regions). temperatures of 4900 - 5500 K, being hotter than regular sunspots (3800-4400K), however the surface temperature of HD 209458, 6000K, is also ...
Kepler Team Finds System with Two Potentially Habitable Planets
... like our Earth that consist almost exclusively of rock (represented here by the mineral Enstatite, MgSiO3, a member of the pyroxite silicate mineral series that makes up most of the Earth’s mantle), and so on. The measured radii of Kepler-62e and Kepler-62f plus an estimate of their mass places the ...
... like our Earth that consist almost exclusively of rock (represented here by the mineral Enstatite, MgSiO3, a member of the pyroxite silicate mineral series that makes up most of the Earth’s mantle), and so on. The measured radii of Kepler-62e and Kepler-62f plus an estimate of their mass places the ...
Lecture Seven (Powerpoint format)
... Given the controversy surrounding PSR 1829-10, it is incredibly remarkable that within a year, the first actual discovery of an extrasolar planet was announced -- around another pulsar! In 1992, while studying an isolated millisecond pulsar PSR 1257+12, Alex Wolzczan of Penn State University mad ...
... Given the controversy surrounding PSR 1829-10, it is incredibly remarkable that within a year, the first actual discovery of an extrasolar planet was announced -- around another pulsar! In 1992, while studying an isolated millisecond pulsar PSR 1257+12, Alex Wolzczan of Penn State University mad ...
poster - arXiv
... compute the thermal emission of a dusty resonant structure around Vega (Gorkavyi et al. 2000a, 2000b). Both the Poynting-Robertson and stellar wind drags tend to induce cometary dust inflow toward the star. The modeling has shown that a planet produces an asymmetric resonant dust belt via resonances ...
... compute the thermal emission of a dusty resonant structure around Vega (Gorkavyi et al. 2000a, 2000b). Both the Poynting-Robertson and stellar wind drags tend to induce cometary dust inflow toward the star. The modeling has shown that a planet produces an asymmetric resonant dust belt via resonances ...
Chapter 19 Notes
... rotation of the _______________________ 2) Division of Terrestrial/Jovian Planets: Result of decreasing __________________ throughout the Solar Nebula -> further out, ____________ elements condensed out to form heavier, _______________ planets 3) Icy Comets: Originating in the ______________ Cloud, ...
... rotation of the _______________________ 2) Division of Terrestrial/Jovian Planets: Result of decreasing __________________ throughout the Solar Nebula -> further out, ____________ elements condensed out to form heavier, _______________ planets 3) Icy Comets: Originating in the ______________ Cloud, ...
Extra solar Planets
... More than half of the known stars actually consist of 2 or more stars in orbit about each other, and in our own case Jupiter might be considered a failed solar companion. There are presently 13 known multiplanet systems. ...
... More than half of the known stars actually consist of 2 or more stars in orbit about each other, and in our own case Jupiter might be considered a failed solar companion. There are presently 13 known multiplanet systems. ...
The Origin of Our Solar System II The Origin of Our Solar System II
... light comes from them tends to be lost in the glare from their parent star. •It is very difficult to detect them directly. In certain cases, however, current telescopes may be capable of directly imaging planets. ...
... light comes from them tends to be lost in the glare from their parent star. •It is very difficult to detect them directly. In certain cases, however, current telescopes may be capable of directly imaging planets. ...
Universe 8e Lecture Chapter 8 Origin of Our Solar System
... light comes from them tends to be lost in the glare from their parent star. •It is very difficult to detect them directly. In certain cases, however, current telescopes may be capable of directly imaging planets. ...
... light comes from them tends to be lost in the glare from their parent star. •It is very difficult to detect them directly. In certain cases, however, current telescopes may be capable of directly imaging planets. ...
The Origin of Oxygen Isotopic Anomalies Seen in Primitive Meteorites
... independent fractionation meteorites have oxygen isotope ratios where the rare isotopes are slightly more abundant (50 per mil) than 16O. ...
... independent fractionation meteorites have oxygen isotope ratios where the rare isotopes are slightly more abundant (50 per mil) than 16O. ...
Effects of Star-Planet Interaction. HD 189733 and WASP-18.
... stars through tidal and magnetic interaction. Some stars with hot Jupiters have shown variations of their activity phased with the planetary motion, due to starplanet interaction (SPI) of magnetic and tidal origin (e.g. µ And HD 179949, τ Boo and HD 189733, Shkolnik et al. 2003, 2005, 2008, Walker e ...
... stars through tidal and magnetic interaction. Some stars with hot Jupiters have shown variations of their activity phased with the planetary motion, due to starplanet interaction (SPI) of magnetic and tidal origin (e.g. µ And HD 179949, τ Boo and HD 189733, Shkolnik et al. 2003, 2005, 2008, Walker e ...
Curriculum Vitae of Pawel Artymowicz
... In collaboration with Lubow I have studied the resonant and tidal interactions of a binary with a disk. This theory predicts the creation of a gap around a binary, with the size depending on the binary separation, mass ratio and (the previously neglected) eccentricity [22], and has since been used t ...
... In collaboration with Lubow I have studied the resonant and tidal interactions of a binary with a disk. This theory predicts the creation of a gap around a binary, with the size depending on the binary separation, mass ratio and (the previously neglected) eccentricity [22], and has since been used t ...
Mamajek
... mass companion” 2M1207b - it is either way too hot or way to dim. Why? We are using MMT/AO + Clio imaging in the thermal IR to search for planets around nearby stars (so far no detections). Apodized phase plate optic is allowing us to probe at smaller orbital radii (~0.5”; ~5 AU @ 10 pc) ...
... mass companion” 2M1207b - it is either way too hot or way to dim. Why? We are using MMT/AO + Clio imaging in the thermal IR to search for planets around nearby stars (so far no detections). Apodized phase plate optic is allowing us to probe at smaller orbital radii (~0.5”; ~5 AU @ 10 pc) ...
Slide 1
... Extra Notes on Stellar Evolution As the planetesimals clump and collide, eventually a handful of big ones start to dominate and collect more and more stuff. By the time this process is nearly over, we have maybe a 15-20 planets in a system, all completely molten and still being hit by asteroids all ...
... Extra Notes on Stellar Evolution As the planetesimals clump and collide, eventually a handful of big ones start to dominate and collect more and more stuff. By the time this process is nearly over, we have maybe a 15-20 planets in a system, all completely molten and still being hit by asteroids all ...
Introduction: The Night Sky
... Solar system planets in near-circular orbits Binary stars (and brown dwarfs?) often in eccentric orbits Many of these objects are in eccentric orbits ...
... Solar system planets in near-circular orbits Binary stars (and brown dwarfs?) often in eccentric orbits Many of these objects are in eccentric orbits ...
Chapter 21, Section 4 Star Systems and Galaxies
... Our solar system exists in the Milky Way galaxy, and is about 25,000 light-years away from the center of the Milky Way Our solar system is about two-thirds of the way out on one of the spiral arms of the Milky Way We can’t see the center of the Milky Way due to the massive cloud of gas and dust ...
... Our solar system exists in the Milky Way galaxy, and is about 25,000 light-years away from the center of the Milky Way Our solar system is about two-thirds of the way out on one of the spiral arms of the Milky Way We can’t see the center of the Milky Way due to the massive cloud of gas and dust ...
Night Sky Viewing at Widener University April 2017
... greatest elongation east of the Sun and sets over 1½ hours after sunset. Mercury remains viewable for about the first week and a half of April, after which it sinks rapidly into the evening twilight. Mercury reaches inferior conjunction on the 20th when it passes between Earth and Sun, and then it s ...
... greatest elongation east of the Sun and sets over 1½ hours after sunset. Mercury remains viewable for about the first week and a half of April, after which it sinks rapidly into the evening twilight. Mercury reaches inferior conjunction on the 20th when it passes between Earth and Sun, and then it s ...
Beta Pictoris
Beta Pictoris (β Pic, β Pictoris) is the second brightest star in the constellation Pictor. It is located 63.4 light years from our solar system, and is 1.75 times as massive and 8.7 times as luminous as the Sun. The Beta Pictoris system is very young, only 8–20 million years old, although it is already in the main sequence stage of its evolution. Beta Pictoris is the title member of the Beta Pictoris moving group, an association of young stars which share the same motion through space and have the same age.Beta Pictoris shows an excess of infrared emission compared to normal stars of its type, which is caused by large quantities of dust and gas (including carbon monoxide) near the star. Detailed observations reveal a large disk of dust and gas orbiting the star, which was the first debris disk to be imaged around another star. In addition to the presence of several planetesimal belts and cometary activity, there are indications that planets have formed within this disk and that the processes of planet formation may still be ongoing. Material from the Beta Pictoris debris disk is thought to be the dominant source of interstellar meteoroids in our solar system.The European Southern Observatory (ESO) has confirmed the presence of a planet, Beta Pictoris b, matching previous predictions, through the use of direct imagery, orbiting in the plane of the debris disk surrounding the star. This planet is currently the closest extrasolar planet to its star ever photographed: the observed separation is roughly the same as the distance between Saturn and the Sun.