THE 2MASS WIDE-FIELD T DWARF SEARCH. II. DISCOVERY OF
... (e1>5) on September 20 and 23, but excellent (d100 ) on the remaining nights. Pairs of 15 s integrations were obtained for each object, dithered 1000 –2000 between exposures. The sensitivity of these images was verified to be greater than that of 2MASS, which has a J-band S/N = 10 completeness limit ...
... (e1>5) on September 20 and 23, but excellent (d100 ) on the remaining nights. Pairs of 15 s integrations were obtained for each object, dithered 1000 –2000 between exposures. The sensitivity of these images was verified to be greater than that of 2MASS, which has a J-band S/N = 10 completeness limit ...
CoRoT III programme
... the possibility to probe the stellar populations of the galaxy, and opens a new discipline: Galactic Structure and Evolution using Seismology. In this programme CoRoT and Kepler are complementary because they observe different regions of the galaxy. Only CoRoT observes in the outer galactic disk, an ...
... the possibility to probe the stellar populations of the galaxy, and opens a new discipline: Galactic Structure and Evolution using Seismology. In this programme CoRoT and Kepler are complementary because they observe different regions of the galaxy. Only CoRoT observes in the outer galactic disk, an ...
Document
... • In the Beginning, there was J. R. Hind… – In October 1852, Hind reported on the discovery of a nebulosity ~35” from an apparently variable ~10th mag star – (T Tauri, of the variable star catalogs) – After many observations of this nebula in the 1850’s, several articles in the 1860’s noted that it ...
... • In the Beginning, there was J. R. Hind… – In October 1852, Hind reported on the discovery of a nebulosity ~35” from an apparently variable ~10th mag star – (T Tauri, of the variable star catalogs) – After many observations of this nebula in the 1850’s, several articles in the 1860’s noted that it ...
Galaxies - hwchemistry
... – For example, studies of nearby galaxies show that an average galaxy like Milky Way has a luminosity about 16 billion times the sun’s. – If astronomers see a similar galaxy far away, they can measure its apparent magnitude and calculate its distance. ...
... – For example, studies of nearby galaxies show that an average galaxy like Milky Way has a luminosity about 16 billion times the sun’s. – If astronomers see a similar galaxy far away, they can measure its apparent magnitude and calculate its distance. ...
Characterization of the physical properties of the ROSETTA target
... mm-sized or larger particles (Agarwal 2007, and references therein). These dust grains have low emission speed (about m/s) and are little sensitive to solar radiation pressure, thus they remain close to the comet orbit for two or more revolutions around the Sun. They appear as a faint linear structu ...
... mm-sized or larger particles (Agarwal 2007, and references therein). These dust grains have low emission speed (about m/s) and are little sensitive to solar radiation pressure, thus they remain close to the comet orbit for two or more revolutions around the Sun. They appear as a faint linear structu ...
IAA Annual Report 2014
... information not only about the stars, but also on the characteristics of the surrounding ISM. High angular resolution observations are being used for analysing the multiplicity of massive objects. The centre of the Milky Way is of fundamental interest for astrophysics because it is the only galactic ...
... information not only about the stars, but also on the characteristics of the surrounding ISM. High angular resolution observations are being used for analysing the multiplicity of massive objects. The centre of the Milky Way is of fundamental interest for astrophysics because it is the only galactic ...
the comet`s tale - Institute of Astronomy
... observations and orbits were published in Monthly Notices, but unusually there are no noteworthy items on comets from 150 years ago. The only piece that caught my attention was a note in the obituaries at the fortyfourth Annual General Meeting that “The King of Siam, an Honorary Member, reported as ...
... observations and orbits were published in Monthly Notices, but unusually there are no noteworthy items on comets from 150 years ago. The only piece that caught my attention was a note in the obituaries at the fortyfourth Annual General Meeting that “The King of Siam, an Honorary Member, reported as ...
La Sapienza – 2015
... 30 Jupiter masses (HD 284149 b) The shortest year 4.5 hours (KOI-1843 b) The longest year 730000 days (Oph 11 b) The closest to the Earth 4.4 light years (Alpha Cent Bb) The farest to the Earth 22000 light years (OGLE-390 b) ...
... 30 Jupiter masses (HD 284149 b) The shortest year 4.5 hours (KOI-1843 b) The longest year 730000 days (Oph 11 b) The closest to the Earth 4.4 light years (Alpha Cent Bb) The farest to the Earth 22000 light years (OGLE-390 b) ...
IOTA Observer`s Manual
... companions, pinpoint the position of X-ray and radio sources, determine the size and shape of lunar mountains, determine stellar diameters, and the recent hot area of determining the size and shape of asteroids in our solar system. In 1985, Pluto’s atmosphere was discovered by the occultation techni ...
... companions, pinpoint the position of X-ray and radio sources, determine the size and shape of lunar mountains, determine stellar diameters, and the recent hot area of determining the size and shape of asteroids in our solar system. In 1985, Pluto’s atmosphere was discovered by the occultation techni ...
Famous Comets - Mr. Hill`s Science Website
... After discovery, the comet continued on its journey towards the Sun. As it got closer, its tail got larger and became easier to spot. On 20th May 1996, Terry Lovejoy of Queensland, Australia became the first person to spot the comet with the naked eye. It would have still been very faint from Earth, ...
... After discovery, the comet continued on its journey towards the Sun. As it got closer, its tail got larger and became easier to spot. On 20th May 1996, Terry Lovejoy of Queensland, Australia became the first person to spot the comet with the naked eye. It would have still been very faint from Earth, ...
PhD thesis
... 1 Massive star formation 1.1 Massive star formation . . . . . . . . . . . . . . . . . . . . . . 1.1.1 Observational massive star-forming features . . . . . . 1.2 Ionized gas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2.1 Thermal emission from ionized gas . . . . . . . . . . . . 1.2. ...
... 1 Massive star formation 1.1 Massive star formation . . . . . . . . . . . . . . . . . . . . . . 1.1.1 Observational massive star-forming features . . . . . . 1.2 Ionized gas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2.1 Thermal emission from ionized gas . . . . . . . . . . . . 1.2. ...
THE COMET`S TALE - Institute of Astronomy
... Uranus in the primordial Solar System nebula. Until now, the formation temperature had only been determined for water ice in comets, and this is the first time that it has been measured for another molecule. Dr. Jun-ichi ...
... Uranus in the primordial Solar System nebula. Until now, the formation temperature had only been determined for water ice in comets, and this is the first time that it has been measured for another molecule. Dr. Jun-ichi ...
SkyWatcher2017.5 1.3 Mb - Boise Astronomical Society
... luminosity distance of DL = 749 mega-parsecs may be calculated from z. It is also one of the most luminous quasars known, with an absolute magnitude of −26.7, meaning that if it were only as distant as Pollux it would appear nearly as bright in the sky as the Sun. Since the sun's absolute magnitude ...
... luminosity distance of DL = 749 mega-parsecs may be calculated from z. It is also one of the most luminous quasars known, with an absolute magnitude of −26.7, meaning that if it were only as distant as Pollux it would appear nearly as bright in the sky as the Sun. Since the sun's absolute magnitude ...
Abstract The Star Formation History of Low Surface Brightness Galaxies
... The star formation histories of low surface brightness galaxies are interesting but poorly constrained. These objects tend to be rather blue, contradicting the initial impression that they may simply be faded remnants of higher surface brightness galaxies whose star formation has finished. Other sce ...
... The star formation histories of low surface brightness galaxies are interesting but poorly constrained. These objects tend to be rather blue, contradicting the initial impression that they may simply be faded remnants of higher surface brightness galaxies whose star formation has finished. Other sce ...
The Lake Baikal Three Messenger Conference
... – TeV pulsed emission from the Crab pulsar detected by MAGIC Presenters: GALINDO, Daniel – MAGIC observations under extreme conditions Presenters: FRUCK, Christian – The future of gamma-ray astronomy Presenters: KNÖDLSEDER, Jürgen – Lunch – Perspectives for Gamma Astronomy at very high energy (E > 1 ...
... – TeV pulsed emission from the Crab pulsar detected by MAGIC Presenters: GALINDO, Daniel – MAGIC observations under extreme conditions Presenters: FRUCK, Christian – The future of gamma-ray astronomy Presenters: KNÖDLSEDER, Jürgen – Lunch – Perspectives for Gamma Astronomy at very high energy (E > 1 ...
The Early Evolution of Solids in Protoplanetary Disks
... models of early growth of solids. In this Thesis I obtained and analyzed new data in the millimetre for a sample of more than 50 young disks in three nearby star forming regions (Taurus, Ophiuchus, Orion); for all these sources I derived some of the main properties of dust particles, such as grain s ...
... models of early growth of solids. In this Thesis I obtained and analyzed new data in the millimetre for a sample of more than 50 young disks in three nearby star forming regions (Taurus, Ophiuchus, Orion); for all these sources I derived some of the main properties of dust particles, such as grain s ...
Article PDF - IOPscience
... and broadband colors with the clumpiness parameter S, the uniquely large asymmetries of 66 galaxies undergoing mergers, and the correlation of bulge to total light ratios, and stellar masses, with the concentration index. As an obvious goal is to use this system at high redshifts to trace evolution, ...
... and broadband colors with the clumpiness parameter S, the uniquely large asymmetries of 66 galaxies undergoing mergers, and the correlation of bulge to total light ratios, and stellar masses, with the concentration index. As an obvious goal is to use this system at high redshifts to trace evolution, ...
M sin i
... samples. But assuming dN / dlog a ~ const, one can estimate how many are missing. EXTRASOLAR PLANETS ESO September 2005 Dante Minniti (U. Católica) ...
... samples. But assuming dN / dlog a ~ const, one can estimate how many are missing. EXTRASOLAR PLANETS ESO September 2005 Dante Minniti (U. Católica) ...
united states district court
... the increased refraction of light rays that occurs when rays strike a lens or mirror near its edge, in comparison with those that strike nearer the center. For small telescopes using spherical mirrors with shorter focal ratios, light from a distant point source (such as a star) is not all focused at ...
... the increased refraction of light rays that occurs when rays strike a lens or mirror near its edge, in comparison with those that strike nearer the center. For small telescopes using spherical mirrors with shorter focal ratios, light from a distant point source (such as a star) is not all focused at ...
The Pupil mapping Exoplanet Coronagraphic Observer
... bandpass with predicted PIAA performance in the PECO observatory (1.4-m aperture). Photon noise and 16 electrons total detector noise (for an electron-multiplying CCD) have been added. This and other RV planets are very easy detections for PECO even in the presence of significant exozodiacal dust, d ...
... bandpass with predicted PIAA performance in the PECO observatory (1.4-m aperture). Photon noise and 16 electrons total detector noise (for an electron-multiplying CCD) have been added. This and other RV planets are very easy detections for PECO even in the presence of significant exozodiacal dust, d ...
FY12 - National Optical Astronomy Observatory
... time domain, and exoplanet characterization and the study of their parent stars. Such leadership is exercised through a range of project size, from a few nights to tens of nights per year over several years, and general-purpose instrumentation on world-class facilities. To enable scientific and tech ...
... time domain, and exoplanet characterization and the study of their parent stars. Such leadership is exercised through a range of project size, from a few nights to tens of nights per year over several years, and general-purpose instrumentation on world-class facilities. To enable scientific and tech ...
1997 Apparition of Comet Hale-Bopp - HIGP
... grow larger than others, becoming planetesimals, and these begin to sweep up all the other debris along their orbits about the central protostar. As the planetesimals get larger, the velocities get higher and the collisions get more violent, (4). In the vicinity of the giant planets, some of the vol ...
... grow larger than others, becoming planetesimals, and these begin to sweep up all the other debris along their orbits about the central protostar. As the planetesimals get larger, the velocities get higher and the collisions get more violent, (4). In the vicinity of the giant planets, some of the vol ...
The Lupus clouds - European Southern Observatory
... evolution and perhaps the origin of the complex. The entire variety of objects related to the various stages of early stellar evolution are represented in Lupus, including some of the best studied T Tauri stars like RU Lup. The determination of many properties of the clouds, as well as their associa ...
... evolution and perhaps the origin of the complex. The entire variety of objects related to the various stages of early stellar evolution are represented in Lupus, including some of the best studied T Tauri stars like RU Lup. The determination of many properties of the clouds, as well as their associa ...
Strongly suggested reading: The Milky Way`s stellar disk
... But for us, it is the only galaxy whose stellar distribution we can see in its full dimensionality: star-by-star we can obtain 3D positions and 3D velocities (vlos , μ , μb ), coupled with the stars’ photospheric element abundances and constraints on their ages. We know that in principle this enorm ...
... But for us, it is the only galaxy whose stellar distribution we can see in its full dimensionality: star-by-star we can obtain 3D positions and 3D velocities (vlos , μ , μb ), coupled with the stars’ photospheric element abundances and constraints on their ages. We know that in principle this enorm ...
PLUTO - Department of Earth and Planetary Sciences, Northwestern
... Since its discovery in 1930, very little new data has been gathered about Pluto. Most of the present data is acquired using ground-based observatories as well as Hubble Space Telescope (HST). Most of the stuff we know about Pluto has been provided by close analysis of these data. At the very edge of ...
... Since its discovery in 1930, very little new data has been gathered about Pluto. Most of the present data is acquired using ground-based observatories as well as Hubble Space Telescope (HST). Most of the stuff we know about Pluto has been provided by close analysis of these data. At the very edge of ...
Spitzer Space Telescope
The Spitzer Space Telescope (SST), formerly the Space Infrared Telescope Facility (SIRTF), is an infrared space observatory launched in 2003. It is the fourth and final of the NASA Great Observatories program.The planned mission period was to be 2.5 years with a pre-launch expectation that the mission could extend to five or slightly more years until the onboard liquid helium supply was exhausted. This occurred on 15 May 2009. Without liquid helium to cool the telescope to the very low temperatures needed to operate, most of the instruments are no longer usable. However, the two shortest-wavelength modules of the IRAC camera are still operable with the same sensitivity as before the cryogen was exhausted, and will continue to be used in the Spitzer Warm Mission. All Spitzer data, from both the primary and warm phases, are archived at the Infrared Science Archive (IRSA).In keeping with NASA tradition, the telescope was renamed after its successful demonstration of operation, on 18 December 2003. Unlike most telescopes that are named after famous deceased astronomers by a board of scientists, the new name for SIRTF was obtained from a contest open to the general public.The contest led to the telescope being named in honor of astronomer Lyman Spitzer, who had promoted the concept of space telescopes in the 1940s. Spitzer wrote a 1946 report for RAND Corporation describing the advantages of an extraterrestrial observatory and how it could be realized with available or upcoming technology. He has been cited for his pioneering contributions to rocketry and astronomy, as well as ""his vision and leadership in articulating the advantages and benefits to be realized from the Space Telescope Program.""The US$800 million Spitzer was launched from Cape Canaveral Air Force Station, on a Delta II 7920H ELV rocket, Monday, 25 August 2003 at 13:35:39 UTC-5 (EDT).It follows a heliocentric instead of geocentric orbit, trailing and drifting away from Earth's orbit at approximately 0.1 astronomical unit per year (a so-called ""earth-trailing"" orbit). The primary mirror is 85 centimeters (33 in) in diameter, f/12, made of beryllium and is cooled to 5.5 K (−449.77 °F). The satellite contains three instruments that allow it to perform astronomical imaging and photometry from 3 to 180 micrometers, spectroscopy from 5 to 40 micrometers, and spectrophotometry from 5 to 100 micrometers.