Project Icarus: Astronomical Considerations Relating to the Choice
... (which would be below the sensitivity of the current measurements). The statistical results discussed in Section 5 actually imply that it is quite likely that one or more of these nearby M dwarf stars will be found to be accompanied by one or more low-mass planets. Only further observations will tel ...
... (which would be below the sensitivity of the current measurements). The statistical results discussed in Section 5 actually imply that it is quite likely that one or more of these nearby M dwarf stars will be found to be accompanied by one or more low-mass planets. Only further observations will tel ...
A Story about a Star`s Life
... • Brightest stars had magnitude 1 and dimmest had magnitude 6 • The system is still used today and units of measurement are called apparent magnitudes to emphasize how bright a star looks to an observer ...
... • Brightest stars had magnitude 1 and dimmest had magnitude 6 • The system is still used today and units of measurement are called apparent magnitudes to emphasize how bright a star looks to an observer ...
Starspots (AIP – Klaus G
... to the close proximity of any potentially habitable planets, but also due to the fact that M dwarfs tend to be more magnetically active than earlier-type stars. Solid number statistics are still missing and an observing campaign for selected targets with our APT in Arizona or STELLA and BMK10k in Te ...
... to the close proximity of any potentially habitable planets, but also due to the fact that M dwarfs tend to be more magnetically active than earlier-type stars. Solid number statistics are still missing and an observing campaign for selected targets with our APT in Arizona or STELLA and BMK10k in Te ...
dark matter - University of Texas Astronomy Home Page
... bulge. The Sun’s orbit is marked by Star B and Star C is farther out in the disk than the Sun. Which star do you think is traveling fastest and which is traveling more slowly? ...
... bulge. The Sun’s orbit is marked by Star B and Star C is farther out in the disk than the Sun. Which star do you think is traveling fastest and which is traveling more slowly? ...
Larger, high-res file, best for printing
... clusters, he referred to them as cluster-type variables; this terminology lasted for quite some time. But, Kiess wrote, “More surprising than the fact that variable stars are present in clusters, was the fact that in the great majority of instances the variation is of a new type.” These stars had sh ...
... clusters, he referred to them as cluster-type variables; this terminology lasted for quite some time. But, Kiess wrote, “More surprising than the fact that variable stars are present in clusters, was the fact that in the great majority of instances the variation is of a new type.” These stars had sh ...
As far as - Sangeeta Malhotra
... As part of the GRAPES project, my team performed spectroscopy on the HUDF target region between October 2002 and January 2003, using about 10 percent of the time that went into imaging. We quickly discovered that GRAPES is not just an extragalactic survey, for the HUDF distance scale starts within o ...
... As part of the GRAPES project, my team performed spectroscopy on the HUDF target region between October 2002 and January 2003, using about 10 percent of the time that went into imaging. We quickly discovered that GRAPES is not just an extragalactic survey, for the HUDF distance scale starts within o ...
Planet migration
... Now >500 planets discovered using this method, >5% of stars have planets (see http://exoplanet.eu or http://exoplanets.org) ...
... Now >500 planets discovered using this method, >5% of stars have planets (see http://exoplanet.eu or http://exoplanets.org) ...
Constituents of the Milky Way
... Measuring Ages of Individual Stars For individual stars that aren’t in clusters (like the Sun), we can’t use the cluster turnoff method to measure an age. For instance, a lone G star might be young, or it might be 10 billion years old. How do we measure its age? The universe contained only hydrogen ...
... Measuring Ages of Individual Stars For individual stars that aren’t in clusters (like the Sun), we can’t use the cluster turnoff method to measure an age. For instance, a lone G star might be young, or it might be 10 billion years old. How do we measure its age? The universe contained only hydrogen ...
Clusters of galaxies
... Identification, deep photometry and spectroscopy of 10 clusters around z ~ 0.5 and 10 around z ~ 0.8 Spectroscopy is FORS2 (R ~ 1200) Science goals are build up of stellar populations with redshift (plus weak lensing). ...
... Identification, deep photometry and spectroscopy of 10 clusters around z ~ 0.5 and 10 around z ~ 0.8 Spectroscopy is FORS2 (R ~ 1200) Science goals are build up of stellar populations with redshift (plus weak lensing). ...
1. setting the scene 2. the cosmic dark ages and the first stars
... Our knowledge of the process by which gas turns into stars is still sketchy. One thing we do know is that stars are not all of the same mass – when a cloud of gas cools and condenses to form a cluster of stars, some stars will be as heavy as our Sun, while others will be less massive and yet others ...
... Our knowledge of the process by which gas turns into stars is still sketchy. One thing we do know is that stars are not all of the same mass – when a cloud of gas cools and condenses to form a cluster of stars, some stars will be as heavy as our Sun, while others will be less massive and yet others ...
parallax
... experiment above. How does the parallax (the apparent shift of the position of your finger) change as your finger is moved closer to your ...
... experiment above. How does the parallax (the apparent shift of the position of your finger) change as your finger is moved closer to your ...
PARALLAX EXERCISE1 The goal of this exercise is to introduce the
... experiment above. How does the parallax (the apparent shift of the position of your finger) change as your finger is moved closer to your ...
... experiment above. How does the parallax (the apparent shift of the position of your finger) change as your finger is moved closer to your ...
MS 1512–CB58 - Columbia University Department of Astronomy
... the star formation rate, SFR 40M yr , deduced from the far-UV luminosity L1500 after correcting for a factor of ∼ 7 attenuation by dust extinction. This and other empirical properties we have delineated will provide constraints to future modelling of such superwinds from starburst galaxies. Compa ...
... the star formation rate, SFR 40M yr , deduced from the far-UV luminosity L1500 after correcting for a factor of ∼ 7 attenuation by dust extinction. This and other empirical properties we have delineated will provide constraints to future modelling of such superwinds from starburst galaxies. Compa ...
Word - Lyon College
... got an inkling that there might be a smaller, third planet orbiting the star. In fact, if they hadn't taken account of the resonant interaction between the two known planets, they never would have seen the third. "We had a model for the two planets interacting with one another, but when we looked at ...
... got an inkling that there might be a smaller, third planet orbiting the star. In fact, if they hadn't taken account of the resonant interaction between the two known planets, they never would have seen the third. "We had a model for the two planets interacting with one another, but when we looked at ...
Visual Double Star Measurements with Equatorial - Alt
... telescope is moved so that the primary star accurately drifts through the central division mark. In practice, the primary is situated about 5-8 division marks away from the central mark and allowed to drift. If the star drifts through the central mark, the drift sequence is allowed to continue until ...
... telescope is moved so that the primary star accurately drifts through the central division mark. In practice, the primary is situated about 5-8 division marks away from the central mark and allowed to drift. If the star drifts through the central mark, the drift sequence is allowed to continue until ...
10. Exoplanets
... • We cannot measure an exact mass for a planet without knowing the tilt of its orbit, because Doppler shift tells us only the velocity toward or away from us. • Doppler data give us lower limits on masses. © 2010 Pearson Education, Inc. ...
... • We cannot measure an exact mass for a planet without knowing the tilt of its orbit, because Doppler shift tells us only the velocity toward or away from us. • Doppler data give us lower limits on masses. © 2010 Pearson Education, Inc. ...
Section9 - University of Chicago
... Given an over-density of temperature T and particle density n, at some radius R it will be balanced between collapse and expansion If the length is less than the Jeans length then the over-density does NOT have enough mass to keep particles from escaping. The overdensity will evaporate. However, if ...
... Given an over-density of temperature T and particle density n, at some radius R it will be balanced between collapse and expansion If the length is less than the Jeans length then the over-density does NOT have enough mass to keep particles from escaping. The overdensity will evaporate. However, if ...
TRAPPIST: TRAnsiting Planets and PlanetesImals Small Telescope
... (iv) the stellar density (assuming the orbital period is known). This last quantity can be used with other measured stellar quantities to deduce, via stellar model ling, the mass of the star, which leads finally to the stellar and planet radii (Gillon et al., 2007; 2009). So far, we have gathered ...
... (iv) the stellar density (assuming the orbital period is known). This last quantity can be used with other measured stellar quantities to deduce, via stellar model ling, the mass of the star, which leads finally to the stellar and planet radii (Gillon et al., 2007; 2009). So far, we have gathered ...
paper
... (iv) the stellar density (assuming the orbital period is known). This last quantity can be used with other measured stellar quantities to deduce, via stellar model ling, the mass of the star, which leads finally to the stellar and planet radii (Gillon et al., 2007; 2009). So far, we have gathered ...
... (iv) the stellar density (assuming the orbital period is known). This last quantity can be used with other measured stellar quantities to deduce, via stellar model ling, the mass of the star, which leads finally to the stellar and planet radii (Gillon et al., 2007; 2009). So far, we have gathered ...
The Hubble Redshift Distance Relation
... must be located at the center of the Universe, but this is not the case. As we will discover in this lab, we are not in some preferred location in our Universe. In this lab we will also use the fact that galaxies appear to be moving away from us to infer an age for the Universe, based on the amount ...
... must be located at the center of the Universe, but this is not the case. As we will discover in this lab, we are not in some preferred location in our Universe. In this lab we will also use the fact that galaxies appear to be moving away from us to infer an age for the Universe, based on the amount ...
SIMULATIONS
... Figure 1 from Galaxy Structure and Mode of Star Formation in the SFR-Mass Plane z ~ 2.5 to z ...
... Figure 1 from Galaxy Structure and Mode of Star Formation in the SFR-Mass Plane z ~ 2.5 to z ...
Slide 1
... • Light traveling through lens is refracted differently depending on wavelength • Some light traveling through lens is absorbed • Large lens can be very heavy, and can only be ...
... • Light traveling through lens is refracted differently depending on wavelength • Some light traveling through lens is absorbed • Large lens can be very heavy, and can only be ...
From Inner Earth to Outer Space
... distances and movements. 13. A second of arc, or arcsecond, is a unit of angular measurement that comprises one-sixtieth of an arcminute, or 1⁄3,600 of a degree of arc or 1⁄1,296,000 ≈ 7.7x10-7 of a circle. It is the angular diameter of an object of 1 unit diameter at a distance of 360x60x60/(2π) ≈ ...
... distances and movements. 13. A second of arc, or arcsecond, is a unit of angular measurement that comprises one-sixtieth of an arcminute, or 1⁄3,600 of a degree of arc or 1⁄1,296,000 ≈ 7.7x10-7 of a circle. It is the angular diameter of an object of 1 unit diameter at a distance of 360x60x60/(2π) ≈ ...
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.