RApid Temporal Survey-RATS I: Overview and first results
... sky transparency) – this was done for all the images of the field. In total around 33000 stars were detected in our survey which covered a total of 3 square degrees. All the resulting light curves were analysed and those which had bad magnitude values or errors above 0.1 mag or non-detections in any ...
... sky transparency) – this was done for all the images of the field. In total around 33000 stars were detected in our survey which covered a total of 3 square degrees. All the resulting light curves were analysed and those which had bad magnitude values or errors above 0.1 mag or non-detections in any ...
Astronomy 112 - Solar Physics and Space Weather
... (i.e. curve) for each of four objects in the solar system: Mercury, Mars, the Moon and the Earth. You will use computer digitized images and a special tool designed to facilitate the taking of these measurements. You will also have access to an Excel file which contains a worksheet, and a separate g ...
... (i.e. curve) for each of four objects in the solar system: Mercury, Mars, the Moon and the Earth. You will use computer digitized images and a special tool designed to facilitate the taking of these measurements. You will also have access to an Excel file which contains a worksheet, and a separate g ...
Giant molecular clouds in the Local Group galaxy M 33⋆⋆⋆
... and the molecular and atomic gas masses (not including helium) within the CO cloud contours. The H2 mass is calculated from the CO luminosity following the prescription in Paper I of using a N(H2 )/ICO(1−0) factor of 4 × 1020 cm−2 /(K km s−1 ) which is twice the usually assumed “Galactic” conversion ...
... and the molecular and atomic gas masses (not including helium) within the CO cloud contours. The H2 mass is calculated from the CO luminosity following the prescription in Paper I of using a N(H2 )/ICO(1−0) factor of 4 × 1020 cm−2 /(K km s−1 ) which is twice the usually assumed “Galactic” conversion ...
Astrometry of Asteroids
... Astrometrical Coordinate systems and the Technique of Astrometry The techniques you will be using for this lab involve the measurement of precise star positions, a technique called astrometry, which is one of the fundamental tools of astronomers. Astrometry, of course, enables us to make charts of o ...
... Astrometrical Coordinate systems and the Technique of Astrometry The techniques you will be using for this lab involve the measurement of precise star positions, a technique called astrometry, which is one of the fundamental tools of astronomers. Astrometry, of course, enables us to make charts of o ...
20. Meteorites and the chemical evolution of the Milky Way
... 12C, both made by stellar He burning. In contrast, nucleosynthesis of a secondary specie requires some preexisting metals to be present in the star. Some secondary species include the heavy isotopes of O, 14N, and the s-process elements (Meyer and Zinner, 2006). 3. The star formation rate (SFR) is u ...
... 12C, both made by stellar He burning. In contrast, nucleosynthesis of a secondary specie requires some preexisting metals to be present in the star. Some secondary species include the heavy isotopes of O, 14N, and the s-process elements (Meyer and Zinner, 2006). 3. The star formation rate (SFR) is u ...
Published in Contemp. Phys. 51, 464-465 (2010).
... Sirius would have passed right across the Milky Way during the stone age. One of the Arabic names for Sirius is al-schira al-abur, or “Sirius which has passed across”, raising the fascinating speculation that there could somehow be a human memory of this ancient astronomical event. Sirius also wiggl ...
... Sirius would have passed right across the Milky Way during the stone age. One of the Arabic names for Sirius is al-schira al-abur, or “Sirius which has passed across”, raising the fascinating speculation that there could somehow be a human memory of this ancient astronomical event. Sirius also wiggl ...
Nebulae.The Lagoon and Dumbbell Nebulae
... Undoubtedly, nebulae are one of the most beautiful and attractive astronomical objects. The important information they contain about the formation of variety astronomical objects such as stars, comets, asteroids is what draws our attention to them. Scientist like Edwin Hubble and Charles Messier had ...
... Undoubtedly, nebulae are one of the most beautiful and attractive astronomical objects. The important information they contain about the formation of variety astronomical objects such as stars, comets, asteroids is what draws our attention to them. Scientist like Edwin Hubble and Charles Messier had ...
Astronomy 140 Lecture Notes, Spring 2008 c
... standard light source. Stars are much fainter and hotter than lab standards, and are also much further away and observed through the atmosphere. Correcting for all these problems still leaves an uncertainty of a few percent. However, it is possible to compare stars to an accuracy of 0.1%, so magnitu ...
... standard light source. Stars are much fainter and hotter than lab standards, and are also much further away and observed through the atmosphere. Correcting for all these problems still leaves an uncertainty of a few percent. However, it is possible to compare stars to an accuracy of 0.1%, so magnitu ...
Injection mechanisms of short-lived radionuclides and their
... Evidence for the former presence of 10Be has also been found in hibonites from the Murchison meteorite, at levels that are consistent with the initial 10Be abundance inferred from various CAIs. Importantly, the Murchison hibonites show no evidence for the decay of 41Ca or 26Al. Severe limits on thei ...
... Evidence for the former presence of 10Be has also been found in hibonites from the Murchison meteorite, at levels that are consistent with the initial 10Be abundance inferred from various CAIs. Importantly, the Murchison hibonites show no evidence for the decay of 41Ca or 26Al. Severe limits on thei ...
FIELD ASTRONOMY
... of the celestial sphere to the Northern Hemisphere and back. The point where the sun crosses the celestial equator in its movement from south to north along the ecliptic is known as the vernal equinox, the first day of spring. The vernal equinox is the first point of reference in the equator system ...
... of the celestial sphere to the Northern Hemisphere and back. The point where the sun crosses the celestial equator in its movement from south to north along the ecliptic is known as the vernal equinox, the first day of spring. The vernal equinox is the first point of reference in the equator system ...
Full-text PDF
... galaxies, and simple theories predict that at late times their central galaxies should grow to masses larger than those observed through accretion from cooling flows. In the model we ...
... galaxies, and simple theories predict that at late times their central galaxies should grow to masses larger than those observed through accretion from cooling flows. In the model we ...
Rotation, activity, and stellar obliquities in a large uniform sample of
... Sun itself, and the second on the study of solar analogs, stars which are like the Sun and thus might shed light on characteristics of its composition, structure, activity, planetary system, evolution, and future. Solar analogs are useful in many ways, ranging from finding night-time proxies for the ...
... Sun itself, and the second on the study of solar analogs, stars which are like the Sun and thus might shed light on characteristics of its composition, structure, activity, planetary system, evolution, and future. Solar analogs are useful in many ways, ranging from finding night-time proxies for the ...
Astrometry of Asteroids
... to make charts of objects in the sky, assigning two numbers or celestial coordinates to each object so that we can easily locate it. If you’ve ever used a roadmap or a map of the world, where two coordinates are used to mark the positions of cities and mountains, you know the usefulness of coordinat ...
... to make charts of objects in the sky, assigning two numbers or celestial coordinates to each object so that we can easily locate it. If you’ve ever used a roadmap or a map of the world, where two coordinates are used to mark the positions of cities and mountains, you know the usefulness of coordinat ...
Introduction_to_pulsar_astronomy
... For an isolated pulsar, the two main parameters measured by timing (apart from the position in the sky and the DM) are the rotational period and its first derivative. From these two parameters alone, one can learn a lot about a given pulsar. ...
... For an isolated pulsar, the two main parameters measured by timing (apart from the position in the sky and the DM) are the rotational period and its first derivative. From these two parameters alone, one can learn a lot about a given pulsar. ...
PDF
... morphology by exploiting deep HST images spanning a substantial range in look-back time. Prior to HST, attempts had been made from the best ground-based observatories to resolve and classify distant galaxies but, even in the best conditions, galaxies as close as redshifts of 0.3–0.5 (corresponding t ...
... morphology by exploiting deep HST images spanning a substantial range in look-back time. Prior to HST, attempts had been made from the best ground-based observatories to resolve and classify distant galaxies but, even in the best conditions, galaxies as close as redshifts of 0.3–0.5 (corresponding t ...
Sec 30.1 - Highland High School
... with low (flat) eccentricity, and their orbits lie close to the plane of the disk. Population I stars also have normal compositions, meaning that approximately 2 percent of their mass is made up of elements heavier than helium. ...
... with low (flat) eccentricity, and their orbits lie close to the plane of the disk. Population I stars also have normal compositions, meaning that approximately 2 percent of their mass is made up of elements heavier than helium. ...
Influence of the Gould Belt on Interstellar Extinction
... objects, and the extinction for a typical large region of space can be determined as, say, 5.0m ± 0.5m , i.e., with an accuracy of 10%. An analytical model of extinction within the nearest kiloparsec with a relative accuracy higher than that of the model by Arenou et al. (1992) is unlikely to be po ...
... objects, and the extinction for a typical large region of space can be determined as, say, 5.0m ± 0.5m , i.e., with an accuracy of 10%. An analytical model of extinction within the nearest kiloparsec with a relative accuracy higher than that of the model by Arenou et al. (1992) is unlikely to be po ...
Astrometry of Asteroids
... are small rocky objects that orbit the sun just like planets. They are located predominately between the orbit of Mars and Jupiter, about 2.8 Astronomical Units from the sun. Asteroids do orbit closer to the sun, even crossing the earth’s orbit. Occasionally an earth-crossing orbit, may even collide ...
... are small rocky objects that orbit the sun just like planets. They are located predominately between the orbit of Mars and Jupiter, about 2.8 Astronomical Units from the sun. Asteroids do orbit closer to the sun, even crossing the earth’s orbit. Occasionally an earth-crossing orbit, may even collide ...
Astrometry of Asteroids
... are small rocky objects that orbit the sun just like planets. They are located predominately between the orbit of Mars and Jupiter, about 2.8 Astronomical Units from the sun. Asteroids do orbit closer to the sun, even crossing the earth’s orbit. Occasionally an earth-crossing orbit, may even collide ...
... are small rocky objects that orbit the sun just like planets. They are located predominately between the orbit of Mars and Jupiter, about 2.8 Astronomical Units from the sun. Asteroids do orbit closer to the sun, even crossing the earth’s orbit. Occasionally an earth-crossing orbit, may even collide ...
OBSERVING LUNAR AND ASTEROIDAL OCCULTATIONS: A
... The next phase will be to use your newfound abilities to observe (and perhaps record using the same equipment) an asteroidal occultation. Your prediction resource will be from www.asteroidoccultation.com which will aid you in geographic areas of best viewing, key information on each occultation, and ...
... The next phase will be to use your newfound abilities to observe (and perhaps record using the same equipment) an asteroidal occultation. Your prediction resource will be from www.asteroidoccultation.com which will aid you in geographic areas of best viewing, key information on each occultation, and ...
Astrometry of Asteroids
... are small rocky objects that orbit the sun just like planets. They are located predominately between the orbit of Mars and Jupiter, about 2.8 Astronomical Units from the sun. Asteroids do orbit closer to the sun, even crossing the earth’s orbit. Occasionally an earth-crossing orbit, may even collide ...
... are small rocky objects that orbit the sun just like planets. They are located predominately between the orbit of Mars and Jupiter, about 2.8 Astronomical Units from the sun. Asteroids do orbit closer to the sun, even crossing the earth’s orbit. Occasionally an earth-crossing orbit, may even collide ...
Astrometry of Asteroids
... are small rocky objects that orbit the sun just like planets. They are located predominately between the orbit of Mars and Jupiter, about 2.8 Astronomical Units from the sun. Asteroids do orbit closer to the sun, even crossing the earth’s orbit. Occasionally an earth-crossing orbit, may even collide ...
... are small rocky objects that orbit the sun just like planets. They are located predominately between the orbit of Mars and Jupiter, about 2.8 Astronomical Units from the sun. Asteroids do orbit closer to the sun, even crossing the earth’s orbit. Occasionally an earth-crossing orbit, may even collide ...
Infrared Properties of Star-Forming Dwarf Galaxies. I. Dwarf Irregular
... the NIR light of dIs can be considered to be predominantly contributed by stars older than about 4 Gyr. Although exponential at large radii, surface brightness profiles for the unresolved component flatten in the centers. They can be fitted across the whole range of radii with a hyperbolic secant (s ...
... the NIR light of dIs can be considered to be predominantly contributed by stars older than about 4 Gyr. Although exponential at large radii, surface brightness profiles for the unresolved component flatten in the centers. They can be fitted across the whole range of radii with a hyperbolic secant (s ...
R136a1
RMC 136a1 (usually abbreviated to R136a1) is a Wolf-Rayet star located at the center of R136, the central condensation of stars of the large NGC 2070 open cluster in the Tarantula Nebula. It lies at a distance of about 50 kiloparsecs (163,000 light-years) in the Large Magellanic Cloud. It has the highest mass and luminosity of any known star, at 265 M☉ and 8.7 million L☉, and also one of the hottest at over 50,000 K.