TWO NEW LONG-PERIOD GIANT PLANETS FROM THE
... Dra B) by the McDonald Observatory planet search. The planet HD95872b has a minimum mass of 4.6MJup and an orbital semimajor axis of 5.2 AU. The giant planet y1 Dra Bb has a minimum mass of 1.5MJup and an orbital semimajor axis of 4.4 AU. Both of these planets qualify as Jupiter analogs. These re ...
... Dra B) by the McDonald Observatory planet search. The planet HD95872b has a minimum mass of 4.6MJup and an orbital semimajor axis of 5.2 AU. The giant planet y1 Dra Bb has a minimum mass of 1.5MJup and an orbital semimajor axis of 4.4 AU. Both of these planets qualify as Jupiter analogs. These re ...
Maximizing the ExoEarth Candidate Yield from a Future Direct
... NASA Goddard Space Flight Center, Exoplanets & Stellar Astrophysics Laboratory, Code 667, Greenbelt, MD 20771; [email protected] ...
... NASA Goddard Space Flight Center, Exoplanets & Stellar Astrophysics Laboratory, Code 667, Greenbelt, MD 20771; [email protected] ...
neutron star
... galaxies are richer in heavy elements than the Sun, with the highest abundances ever seen in the early Universe. Heavy elements that enrich mature galaxies in the local Universe were made in past generations of stars. So these young galaxies have experienced a prodigious rate of star formation and c ...
... galaxies are richer in heavy elements than the Sun, with the highest abundances ever seen in the early Universe. Heavy elements that enrich mature galaxies in the local Universe were made in past generations of stars. So these young galaxies have experienced a prodigious rate of star formation and c ...
The Gould Belt
... The idea of the Supercluster was developed by Eggen [52,53], who combines several fairly young clusters into the Pleiades group (age 100–150 million years) based on the closeness of their kinematics and names this group the “Local association”. The spatial velocities of the stars (calculation of whi ...
... The idea of the Supercluster was developed by Eggen [52,53], who combines several fairly young clusters into the Pleiades group (age 100–150 million years) based on the closeness of their kinematics and names this group the “Local association”. The spatial velocities of the stars (calculation of whi ...
A Zoo of Galaxies - Cambridge University Press
... The variety of different galaxies observed in the sky naturally caused people to wonder what they were. The scientific arguments surrounding this question at the start of the 20th century, are best represented perhaps, by the public debate held in 1920 between Heber Curtis and Harlow Shapley. Many oth ...
... The variety of different galaxies observed in the sky naturally caused people to wonder what they were. The scientific arguments surrounding this question at the start of the 20th century, are best represented perhaps, by the public debate held in 1920 between Heber Curtis and Harlow Shapley. Many oth ...
Astronomical Circumstances
... complex phenomena such that stars can have elaborate internal structures and dynamic lives. Thankfully, it is not necessary for us to understand stars in such detail. In brief, there are two properties of stars that concern us here: 1) The luminosity of a star is a consequence of the star’s mass; an ...
... complex phenomena such that stars can have elaborate internal structures and dynamic lives. Thankfully, it is not necessary for us to understand stars in such detail. In brief, there are two properties of stars that concern us here: 1) The luminosity of a star is a consequence of the star’s mass; an ...
Quo Vadis
... angle dependence, the showers of different E will reach their maxima on different distances from the telescope. • This means that their images will be smeared out depending on their angular deviation from the telescope‘s axis and the best focus plane of the telescope. Needs to be studied what is the ...
... angle dependence, the showers of different E will reach their maxima on different distances from the telescope. • This means that their images will be smeared out depending on their angular deviation from the telescope‘s axis and the best focus plane of the telescope. Needs to be studied what is the ...
Galaxies
... These are galaxies with lanes of stars and nebula emanating from a central nucleus Spiral galaxies range from Tightly wound arms and Large central bulge Loosely wound arms and Small central bulge Direct relationship between the tightness of the arms and size of the central bulge Allows classificatio ...
... These are galaxies with lanes of stars and nebula emanating from a central nucleus Spiral galaxies range from Tightly wound arms and Large central bulge Loosely wound arms and Small central bulge Direct relationship between the tightness of the arms and size of the central bulge Allows classificatio ...
Stars: HR Diagaram Stellar Evolution Astronomy 1 — Elementary Astronomy LA Mission College
... Why might we observe a larger fraction of red giants compared to main sequence stars than the ~10% you would expect from the previous question? ...
... Why might we observe a larger fraction of red giants compared to main sequence stars than the ~10% you would expect from the previous question? ...
ASTRONOMY PORTFOLIO 2009 Atacama Cosmology Telescope
... During the initial concept phase we considered all the details that would influence risk, safety and cost. We then designed the structure in such a way that it was simple to construct using jigs and fixtures to position critical sections of the structure prior to welding. The symmetrical erection se ...
... During the initial concept phase we considered all the details that would influence risk, safety and cost. We then designed the structure in such a way that it was simple to construct using jigs and fixtures to position critical sections of the structure prior to welding. The symmetrical erection se ...
– 1 – 1. Galaxy Observations 1.1.
... rate affecting the UV continuum, and the calibration for UV stellar photospheric features or UV ISM absorption to metallicity is not well understood at present (see Erb 2010 for details). So the best approach is to move into the near-IR, where the normal optical low redshift techniques and calibrati ...
... rate affecting the UV continuum, and the calibration for UV stellar photospheric features or UV ISM absorption to metallicity is not well understood at present (see Erb 2010 for details). So the best approach is to move into the near-IR, where the normal optical low redshift techniques and calibrati ...
AR2012 - Vatican Observatory
... from Star Cluster Ecology to Tracers of Galaxy Evolution. In 1985, the late Fr. Martin McCarthy S.J., an astronomer at the Observatory, recognized that there was too little contact between the astronomers at the Observatory and younger researchers. His solution was to open the observatory to student ...
... from Star Cluster Ecology to Tracers of Galaxy Evolution. In 1985, the late Fr. Martin McCarthy S.J., an astronomer at the Observatory, recognized that there was too little contact between the astronomers at the Observatory and younger researchers. His solution was to open the observatory to student ...
Planet Hunters Education Guide
... them particularly adept at identifying faces, objects, words and sounds. Computers are now sometimes being used to identify faces, but this extremely expensive technology still only works in ideal conditions and generally fails where lighting is poor or where faces are turned to the side. Images use ...
... them particularly adept at identifying faces, objects, words and sounds. Computers are now sometimes being used to identify faces, but this extremely expensive technology still only works in ideal conditions and generally fails where lighting is poor or where faces are turned to the side. Images use ...
distance
... Our nearest neighbor, the Andromeda galaxy, as photographed by Edwin Hubble using the then-new 100 inch telescope on Mt. Wilson, outside LA. World’s largest at the time. ...
... Our nearest neighbor, the Andromeda galaxy, as photographed by Edwin Hubble using the then-new 100 inch telescope on Mt. Wilson, outside LA. World’s largest at the time. ...
Introduction to Dark Matter
... Apart from these methods, gravitational lensing – i.e. the effects associated with the gravitational deflection of light – has also played an important role in the study of dark matter. The notion that gravity can bend rays of light was proposed already by Newton, although the magnitude of this effe ...
... Apart from these methods, gravitational lensing – i.e. the effects associated with the gravitational deflection of light – has also played an important role in the study of dark matter. The notion that gravity can bend rays of light was proposed already by Newton, although the magnitude of this effe ...
Review Astronomy 1 — Elementary Astronomy LA Mission College Spring F2015
... “One may wonder, What came before? If space-time did not exist then, how could everything appear from nothing? . . . Explaining this initial singularity—where and when it all began—still remains the most intractable problem of modern cosmology. — Andrei Linde “But who shall dwell in these worlds if ...
... “One may wonder, What came before? If space-time did not exist then, how could everything appear from nothing? . . . Explaining this initial singularity—where and when it all began—still remains the most intractable problem of modern cosmology. — Andrei Linde “But who shall dwell in these worlds if ...
Hot subdwarf stars-galactic orbits and distribution perpendicular to
... is 0.24, the average normalised z-extent nze of the orbits is 0.16, and the asymmetric drift of our sample is −36 km s−1 . This suggests that our sample of sdB stars is part of a population of thick disk stars. A statistical analysis of the orbits shows that the subdwarf stars have a spatial distrib ...
... is 0.24, the average normalised z-extent nze of the orbits is 0.16, and the asymmetric drift of our sample is −36 km s−1 . This suggests that our sample of sdB stars is part of a population of thick disk stars. A statistical analysis of the orbits shows that the subdwarf stars have a spatial distrib ...
1 The Hubble Story (10:56)
... Earth for 15 years! In many ways Hubble is the most successful scientific project in the World, and this event is not likely to go unnoticed. The European Space Agency, ESA, has decided to celebrate this anniversary with the production of a Hubble 15th Anniversary movie called “Hubble, 15 years of d ...
... Earth for 15 years! In many ways Hubble is the most successful scientific project in the World, and this event is not likely to go unnoticed. The European Space Agency, ESA, has decided to celebrate this anniversary with the production of a Hubble 15th Anniversary movie called “Hubble, 15 years of d ...
STELLAR AGE VERSUS MASS OF EARLY
... have experienced some star formation less than 1 Gyr ago. Similar results were obtained at higher redshifts, for which the rest-frame UV can be probed with optical surveys: Kaviraj et al. (2007b) found “compelling evidence that early-types of all luminosities form stars over the lifetime of the Univ ...
... have experienced some star formation less than 1 Gyr ago. Similar results were obtained at higher redshifts, for which the rest-frame UV can be probed with optical surveys: Kaviraj et al. (2007b) found “compelling evidence that early-types of all luminosities form stars over the lifetime of the Univ ...
Optical interferometry in astronomy
... This review will introduce the theory, technique, and scientific goals of optical stellar interferometry. By combining light collected by widely separated telescopes, interferometrists can overcome the diffraction-limit of an individual telescope. The angular resolution achieved by current instrument ...
... This review will introduce the theory, technique, and scientific goals of optical stellar interferometry. By combining light collected by widely separated telescopes, interferometrists can overcome the diffraction-limit of an individual telescope. The angular resolution achieved by current instrument ...
Looking for planets with SPHERE in planetary systems with double
... graphics plot the mass of the planet Mp versus its semi-major axis ap . Points beneath the curve are not detectable whereas point above it are indeed detectable. In most cases, the only planet of the system would have been detected and, as far as actually it has not been found, we moved to analyze m ...
... graphics plot the mass of the planet Mp versus its semi-major axis ap . Points beneath the curve are not detectable whereas point above it are indeed detectable. In most cases, the only planet of the system would have been detected and, as far as actually it has not been found, we moved to analyze m ...
Introduction
... volume and mass limited, and includes galaxies of all morphological types inhabiting a range of different environments, from galaxies in the dense core of the Virgo cluster to relatively isolated systems. As such, the sample is ideal for disentangling the internal and environmental processes driving ...
... volume and mass limited, and includes galaxies of all morphological types inhabiting a range of different environments, from galaxies in the dense core of the Virgo cluster to relatively isolated systems. As such, the sample is ideal for disentangling the internal and environmental processes driving ...
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.