Introduction - Gettysburg College
... walking around the forest with a compass and transit (or, more recently, a Global Positioning System or GPS receiver), mapping carefully where everything was located. But consider how much more difficult it would be if the surveyor were tied to a tree, unable to budge from a single spot. That’s the ...
... walking around the forest with a compass and transit (or, more recently, a Global Positioning System or GPS receiver), mapping carefully where everything was located. But consider how much more difficult it would be if the surveyor were tied to a tree, unable to budge from a single spot. That’s the ...
ch19
... A star is ripped apart by the tidal forces of a massive black hole (left panel). Part of the stellar debris is then accreted by the black hole (middle panel). This causes a luminous flare of radiation which fades away as more and more of the matter disappears into the black hole ...
... A star is ripped apart by the tidal forces of a massive black hole (left panel). Part of the stellar debris is then accreted by the black hole (middle panel). This causes a luminous flare of radiation which fades away as more and more of the matter disappears into the black hole ...
Comprehensive Census and Complete Characterization of Nearby
... collisions of planetesimals. With the conclusion and lack of future large scale infrared excess survey missions, it is time to summarize the history of using excess emission in the infrared as a tracer of debris and exploit all available data as well as provide a comprehensive study of the parameter ...
... collisions of planetesimals. With the conclusion and lack of future large scale infrared excess survey missions, it is time to summarize the history of using excess emission in the infrared as a tracer of debris and exploit all available data as well as provide a comprehensive study of the parameter ...
Girardi
... NO. 6 Gyr old RC stars are ∼ 1.4 times more frequent than the 10-Gyr old, mainly because they leave the MS at a faster rate, and despite the IMF favouring old stars. Similar conclusions will apply to RGB stars. ...
... NO. 6 Gyr old RC stars are ∼ 1.4 times more frequent than the 10-Gyr old, mainly because they leave the MS at a faster rate, and despite the IMF favouring old stars. Similar conclusions will apply to RGB stars. ...
Star Formation in Our Galaxy - Wiley-VCH
... enough that the transformation can be examined in some detail. Indeed, most research activity in this field consists of our bold, if frequently misguided, attempts to interpret what is in fact happening all around us. We begin, therefore, with the data. The four chapters of Part I describe various a ...
... enough that the transformation can be examined in some detail. Indeed, most research activity in this field consists of our bold, if frequently misguided, attempts to interpret what is in fact happening all around us. We begin, therefore, with the data. The four chapters of Part I describe various a ...
The Physical Properties of Normal A Stars
... significant to being significant with decreasing temperature Many peculiar A stars are detected at classification dispersions (e.g., many mCP stars) while Cowley’s superficially normal A stars (e.g., the HgMn and the marginal Am stars) at higher dispersions. Other peculiar A stars are classified on ...
... significant to being significant with decreasing temperature Many peculiar A stars are detected at classification dispersions (e.g., many mCP stars) while Cowley’s superficially normal A stars (e.g., the HgMn and the marginal Am stars) at higher dispersions. Other peculiar A stars are classified on ...
ASPEN WORKSHOP 2003
... WARNING: These notes were not reviewed by the speakers. For more reliable summaries of what they said (without my editorializing), you should ask the individual speakers for their Powerpoint presentations. Also, notes for several talks are missing since I did not have a working laptop for them and h ...
... WARNING: These notes were not reviewed by the speakers. For more reliable summaries of what they said (without my editorializing), you should ask the individual speakers for their Powerpoint presentations. Also, notes for several talks are missing since I did not have a working laptop for them and h ...
Teaching STEM through Big Telescopes
... The Space-based Astronomy Educator Guide. These resources from NASA look at why telescopes are put into space. Students build simple spectroscopes and telescopes to learn the answer to this question. www.nationalstemcentre.org.uk/elibrary/resource/1134/space-basedastronomy-educator-guide The ESA/ESO ...
... The Space-based Astronomy Educator Guide. These resources from NASA look at why telescopes are put into space. Students build simple spectroscopes and telescopes to learn the answer to this question. www.nationalstemcentre.org.uk/elibrary/resource/1134/space-basedastronomy-educator-guide The ESA/ESO ...
WIMPs and MACHOs - Caltech Astronomy
... except by exquisitely sensitive equipment. These difficulties, however, have not stopped many groups throughout the world from developing devices capable of detecting WIMPs. The detection rates turn out to be within and just beyond the reach of current experimental efforts. The basic idea is to dete ...
... except by exquisitely sensitive equipment. These difficulties, however, have not stopped many groups throughout the world from developing devices capable of detecting WIMPs. The detection rates turn out to be within and just beyond the reach of current experimental efforts. The basic idea is to dete ...
A STEP - Observatoire de la Côte d`Azur
... know of more than ~200 planets or planetary systems orbiting solar type stars in our neighbourhood. The discovery of more planets, smaller planets and the ability to characterize them directly impacts our ability to understand how planets form, how the Solar System formed, and to better prepare futu ...
... know of more than ~200 planets or planetary systems orbiting solar type stars in our neighbourhood. The discovery of more planets, smaller planets and the ability to characterize them directly impacts our ability to understand how planets form, how the Solar System formed, and to better prepare futu ...
13.5 The HR Diagram By the early 1900s, astronomers had learned
... 3000 and 30,000 K and masses between about 0.1 and 30 M⊙. The HR diagram offers a simple, pictorial way to summarize stellar properties. Most stars lie along the main sequence, with hotter stars being more luminous. Of these, the hottest are blue, and the coolest are red. Yellow stars, such as the ...
... 3000 and 30,000 K and masses between about 0.1 and 30 M⊙. The HR diagram offers a simple, pictorial way to summarize stellar properties. Most stars lie along the main sequence, with hotter stars being more luminous. Of these, the hottest are blue, and the coolest are red. Yellow stars, such as the ...
Mapping the Milky Way: William Herschel`s Star-‐Gages
... The left part of Figure 6 shows the 3D view of the star system. This system is just like the previous one except the stars are highly concentrated near the center of the disk. The plot o ...
... The left part of Figure 6 shows the 3D view of the star system. This system is just like the previous one except the stars are highly concentrated near the center of the disk. The plot o ...
CHEOPS Science Requirements Document
... Both CoRoT and Kepler have been successful in reaching their design goals. However, it is revealing that despite this, only two rocky planets have been identified for certain (CoRoT7 and Kepler-10). This paucity of the most interesting targets is related to the faintness of the target stars. The nee ...
... Both CoRoT and Kepler have been successful in reaching their design goals. However, it is revealing that despite this, only two rocky planets have been identified for certain (CoRoT7 and Kepler-10). This paucity of the most interesting targets is related to the faintness of the target stars. The nee ...
Magnificent Cosmos - Academic Program Pages at Evergreen
... stellar motions with an accuracy of plus or minus three this theory, planets cannot form too close to the star, because meters per second—a leisurely bicycling speed. To do this, there is too little disk material, which is also too hot to cowe use an iodine absorption cell—a bottle of iodine vapor— ...
... stellar motions with an accuracy of plus or minus three this theory, planets cannot form too close to the star, because meters per second—a leisurely bicycling speed. To do this, there is too little disk material, which is also too hot to cowe use an iodine absorption cell—a bottle of iodine vapor— ...
McDonald I....Tisserand, P. et al ExELS an
... survey would be slightly increased from the values in Paper I, while colour data from lensing events would constrain properties of many more lower mass free-floating planets. One hour is currently the maximum allowed by the agreed telemetry rate. Secondary masses: We consider an upper limit of 0.3 M ...
... survey would be slightly increased from the values in Paper I, while colour data from lensing events would constrain properties of many more lower mass free-floating planets. One hour is currently the maximum allowed by the agreed telemetry rate. Secondary masses: We consider an upper limit of 0.3 M ...
The Origin, Structure, and Evolution of the Stars
... make a beginning with the first question we must realize that the space between the stars interstellar space is not entirely empty scattered throughout the galaxy is a diffuse gas consisting primarily of hydrogen atoms that is concentrated frequently in clouds the interstellar gas is so rarefied tha ...
... make a beginning with the first question we must realize that the space between the stars interstellar space is not entirely empty scattered throughout the galaxy is a diffuse gas consisting primarily of hydrogen atoms that is concentrated frequently in clouds the interstellar gas is so rarefied tha ...
Exploring Solar Systems Across the Universe
... Figure 4. The wobble of the Sun caused by the gravitational tug of Jupiter as could be seen by an observer located at the distance of some of the nearby stars (10 ...
... Figure 4. The wobble of the Sun caused by the gravitational tug of Jupiter as could be seen by an observer located at the distance of some of the nearby stars (10 ...
Are planetary systems flat?
... – it is astonishing to see all the planets move around the Sun from west to east, and almost in the same plane; all the satellites move around their planets in the same direction and nearly in the same plane as the planets; finally, the Sun, the planets, and all the satellites that have been observe ...
... – it is astonishing to see all the planets move around the Sun from west to east, and almost in the same plane; all the satellites move around their planets in the same direction and nearly in the same plane as the planets; finally, the Sun, the planets, and all the satellites that have been observe ...
Recent science results from VLTI commissioning
... body rotation and mass concentrated at the star center • Stellar parameters from lit (225km/s projected velocity etc) An extreme uniform Roche model with veq=vcrit and i=90° was also used Results: • Be star models don’t work • Extreme (equator-on, rotation at break-up speed) Roche model does but…it ...
... body rotation and mass concentrated at the star center • Stellar parameters from lit (225km/s projected velocity etc) An extreme uniform Roche model with veq=vcrit and i=90° was also used Results: • Be star models don’t work • Extreme (equator-on, rotation at break-up speed) Roche model does but…it ...
Moitinho et al. - Wiley Online Library
... non-Galactic population, but in this case they are much closer than the proposed distance to the CMa galaxy. We now focus on the stellar groups marked with a lighter tone. These groups are distributed between l = 190◦ and l = 270◦ , but seem to form an elongated structure between l = 230◦ and l = 25 ...
... non-Galactic population, but in this case they are much closer than the proposed distance to the CMa galaxy. We now focus on the stellar groups marked with a lighter tone. These groups are distributed between l = 190◦ and l = 270◦ , but seem to form an elongated structure between l = 230◦ and l = 25 ...
Review 3 (11-18-10)
... wavelengths and less the longer (redder) wavelengths. By looking at infrared wavelengths we can see through most of the dust. ...
... wavelengths and less the longer (redder) wavelengths. By looking at infrared wavelengths we can see through most of the dust. ...
WORD - Astrophysics
... studied with resolution comparable only to those of space missions. An E-ELT will be capable of detecting giant planets (Jupiter to Neptune-like) orbiting at separations smaller than 1 AU around thousands of stars up to distances of 100 pc, including many in the nearest star-forming regions. The ult ...
... studied with resolution comparable only to those of space missions. An E-ELT will be capable of detecting giant planets (Jupiter to Neptune-like) orbiting at separations smaller than 1 AU around thousands of stars up to distances of 100 pc, including many in the nearest star-forming regions. The ult ...
Historical astronomy How Johannes Kepler Johannes
... he was 5. Kepler’s mother took him to a hilltop to view the Great Comet of 1577, whose tail arched across the entire sky. Kepler’s first job was as a math teacher in Graz, Austria. It was there that he embarked on his lifelong quest for harmony. In a flight of mathematical mysticism, he tried to lin ...
... he was 5. Kepler’s mother took him to a hilltop to view the Great Comet of 1577, whose tail arched across the entire sky. Kepler’s first job was as a math teacher in Graz, Austria. It was there that he embarked on his lifelong quest for harmony. In a flight of mathematical mysticism, he tried to lin ...
Chapter 25 - Haiku Learning
... Red stars are much cooler, and most of their energy is emitted as longer-wavelength red light. Stars with temperatures between 5000 and 6000 K appear yellow, like the sun. ...
... Red stars are much cooler, and most of their energy is emitted as longer-wavelength red light. Stars with temperatures between 5000 and 6000 K appear yellow, like the sun. ...
Space Interferometry Mission
The Space Interferometry Mission, or SIM, also known as SIM Lite (formerly known as SIM PlanetQuest), was a planned space telescope developed by the U.S. National Aeronautics and Space Administration (NASA), in conjunction with contractor Northrop Grumman. One of the main goals of the mission was the hunt for Earth-sized planets orbiting in the habitable zones of nearby stars other than the Sun. SIM was postponed several times and finally cancelled in 2010.In addition to hunting for extrasolar planets, SIM would have helped astronomers construct a map of the Milky Way galaxy. Other important tasks would have included collecting data to help pinpoint stellar masses for specific types of stars, assisting in the determination of the spatial distribution of dark matter in the Milky Way and in the Local Group of galaxies and using the gravitational microlensing effect to measure the mass of stars.The spacecraft would have used optical interferometry to accomplish these and other scientific goals. This technique collects light with multiple mirrors (in SIM's case, two) which is combined to make an interference pattern which can be very precisely measured.The initial contracts for SIM Lite were awarded in 1998, totaling US$200 million. Work on the SIM project required scientists and engineers to move through eight specific new technology milestones, and by November 2006, all eight had been completed.SIM Lite was originally scheduled for a 2005 launch, aboard an Evolved Expendable Launch Vehicle (EELV). As a result of continued budget cuts, the launch date has been pushed back at least five times. NASA has set a preliminary launch date for 2015 and U.S. federal budget documents confirm that a launch date is expected ""no earlier"" than 2015. The budget cuts to SIM Lite are expected to continue through FY 2010. As of February 2007, many of the engineers working on the SIM program had moved on to other areas and projects, and NASA directed the project to allocate its resources toward engineering risk reduction. However, the preliminary budget for NASA for 2008 included zero dollars for SIM.In December 2007, the Congress restored funding for fiscal year 2008 as part of an omnibus appropriations bill which the President later signed. At the same time the Congress directed NASA to move the mission forward to the development phase. In 2009 the project continued its risk reduction work while waiting for the findings and recommendations of the Astronomy and Astrophysics Decadal Survey, Astro2010, performed by the National Academy of Sciences, which would determine the project's future.On 13 August 2010, the Astro2010 Decadal Report was released and did not recommend that NASA continue the development of the SIM Lite Astrometric Observatory. This prompted NASA Astronomy and Physics Director, Jon Morse, to issue a letter on 24 September 2010 to the SIM Lite project manager, informing him that NASA was discontinuing its sponsorship of the SIM Lite mission and directing the project to discontinue Phase B activities immediately or as soon as practical. Accordingly, all SIM Lite activities were closed down by the end of calendar year 2010.