The Jansky Very Large Array – New Capabilities, New Science
... •Type III radio bursts from the Sun correspond to thermal electron beams propagating in the low corona. The VLA has imaged these bursts on times scales ~ 100ms. •The beams emanate from an energy release site located in the low corona and propagate along a bundle of discrete magnetic loops upward int ...
... •Type III radio bursts from the Sun correspond to thermal electron beams propagating in the low corona. The VLA has imaged these bursts on times scales ~ 100ms. •The beams emanate from an energy release site located in the low corona and propagate along a bundle of discrete magnetic loops upward int ...
Newtonian Telescope Collimation with the Astrosystems LightPipe
... Place the telescope on a horizontal surface or move it to the horizontal. Position the focuser so it is easily accessible. You will be moving back and forth from the rear to the front of the tube assembly to check progress and it helps to have things positioned for convenience. Assemble the proper t ...
... Place the telescope on a horizontal surface or move it to the horizontal. Position the focuser so it is easily accessible. You will be moving back and forth from the rear to the front of the tube assembly to check progress and it helps to have things positioned for convenience. Assemble the proper t ...
The Evolution of Isotope Ratios in the Milky Way Galaxy
... (Sneden et al. 2002). It should be noted however that from that list only the carbon isotope ratio is relatively easy to obtain. For this reason there is data for the carbon isotope ratio for stars in many different evolutionary states, metallicities, and locations (including in external galaxies su ...
... (Sneden et al. 2002). It should be noted however that from that list only the carbon isotope ratio is relatively easy to obtain. For this reason there is data for the carbon isotope ratio for stars in many different evolutionary states, metallicities, and locations (including in external galaxies su ...
Searching for RR Lyrae Stars in M15
... globular clusters about a 120 years ago. Today, around 1,500 RR Lyrae stars have been found in globular clusters (GCs) and around 6,000 isolated stars are known to be RR Lyrae [5]. They pulsate in radius and luminosity over short periods; the brightness rising quickly to its peak followed by a slow ...
... globular clusters about a 120 years ago. Today, around 1,500 RR Lyrae stars have been found in globular clusters (GCs) and around 6,000 isolated stars are known to be RR Lyrae [5]. They pulsate in radius and luminosity over short periods; the brightness rising quickly to its peak followed by a slow ...
Binarity in carbon-enhanced metal-poor stars
... as calibration for the zero-point. The choice of a zero-point based on radial velocity standards is strengthened by a clear observed trend of the radial velocity standards’ offsets with their literature values versus the observation date. The total magnitude of this variation over the full observing ...
... as calibration for the zero-point. The choice of a zero-point based on radial velocity standards is strengthened by a clear observed trend of the radial velocity standards’ offsets with their literature values versus the observation date. The total magnitude of this variation over the full observing ...
PDF only
... figures, the concave lens over the larger figure and the convex lens over the smaller, while the observer looked at them from a distance of about 30 cm. The lens placed over the figure is then lifted away slowly until the figure, seen through the lens, is equal in size to the other figure seen—not s ...
... figures, the concave lens over the larger figure and the convex lens over the smaller, while the observer looked at them from a distance of about 30 cm. The lens placed over the figure is then lifted away slowly until the figure, seen through the lens, is equal in size to the other figure seen—not s ...
Rotation, activity, and stellar obliquities in a large uniform sample of
... This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. ...
... This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. ...
The new Basel high-latitude field star survey of the Galaxy
... to have the respectively largest (Fig. 6, middle panels) and smallest (Fig. 6, bottom panels) values. Qualitatively, the low(er) scale height of the young stars is consistent with (current) massive-star formation in the inner disk being confined to regions of lower thickness than in the outer Galaxy ...
... to have the respectively largest (Fig. 6, middle panels) and smallest (Fig. 6, bottom panels) values. Qualitatively, the low(er) scale height of the young stars is consistent with (current) massive-star formation in the inner disk being confined to regions of lower thickness than in the outer Galaxy ...
Night Sky II Annual Motion Seasons Planetary Motion
... Sun puts out same energy summer & winter, but in summer energy transfer is locally more efficient ...
... Sun puts out same energy summer & winter, but in summer energy transfer is locally more efficient ...
Stellarium User Guide - Skolekonsulenterne.dk
... As well as travelling through time, Stellarium lets to look around the sky freely, and zoom in and out. There are several ways to accomplish this listed in table 3.4. Let’s try it. Use the cursors to move around left, right, up and down. Zoom in a little using the Page Up key, and back out again usi ...
... As well as travelling through time, Stellarium lets to look around the sky freely, and zoom in and out. There are several ways to accomplish this listed in table 3.4. Let’s try it. Use the cursors to move around left, right, up and down. Zoom in a little using the Page Up key, and back out again usi ...
Chapter 12
... seems to move against the background even though in reality it is your head that has changed position, not your hand. This simple demonstration illustrates how parallax gives a clue to an object’s distance. If you hold your hand at different distances from your face, you will notice that the apparen ...
... seems to move against the background even though in reality it is your head that has changed position, not your hand. This simple demonstration illustrates how parallax gives a clue to an object’s distance. If you hold your hand at different distances from your face, you will notice that the apparen ...
Deep SDSS optical spectroscopy of distant halo stars I. Atmospheric
... difficult parameter to extract, and only a handful of methods are available as part of the SSPP. Only a few of the techniques derive all parameters simultaneously and in a consistent manner. An earlier version of our fitting code is included in the SSPP. However, it is only one of many, and the vers ...
... difficult parameter to extract, and only a handful of methods are available as part of the SSPP. Only a few of the techniques derive all parameters simultaneously and in a consistent manner. An earlier version of our fitting code is included in the SSPP. However, it is only one of many, and the vers ...
ASTRONOMY AND ASTROPHYSICS (ASTRO)
... systems discovered around other stars. General characteristics of planetary systems: dynamics, thermodynamics, internal and surface structure of planets and minor bodies, physics of their atmosphere. Discovery techniques and characterization of extrasolar planets, and planetary systems formation mod ...
... systems discovered around other stars. General characteristics of planetary systems: dynamics, thermodynamics, internal and surface structure of planets and minor bodies, physics of their atmosphere. Discovery techniques and characterization of extrasolar planets, and planetary systems formation mod ...
5. Calibration and Monitoring - AP
... ber hardware did not allow rotation of the instrument itself, and only provided views in a limited angular range centred on nadir and limb in the flight direction. Therefore, a combination of thermal vacuum and ambient measurements was used. Radiometric sensitivity and polarisation sensitivity of t ...
... ber hardware did not allow rotation of the instrument itself, and only provided views in a limited angular range centred on nadir and limb in the flight direction. Therefore, a combination of thermal vacuum and ambient measurements was used. Radiometric sensitivity and polarisation sensitivity of t ...
Document
... Pupil rotates wrt post-focal NGS WFS at maximum speed ~15/s for a Zenith angle of 1°. Reconstruction matrix of low order modal loop to be updated every 10s High order loop reconstruction matrix (25GB of data) must be updated every 140s (LGS ...
... Pupil rotates wrt post-focal NGS WFS at maximum speed ~15/s for a Zenith angle of 1°. Reconstruction matrix of low order modal loop to be updated every 10s High order loop reconstruction matrix (25GB of data) must be updated every 140s (LGS ...
Abstracts of Oral Papers
... Stefan Maeder, Kokugakuin University, Faculty of Letters, 4-10-28 Higashi, Shibuya-ku, 150-8440 Tokyo, Japan ([email protected]) The “Big Dipper” in Ursa Major was and is the most conspicuous asterism in the northern sky. Furthermore it is circumpolar and could be used as a means for identifying the ...
... Stefan Maeder, Kokugakuin University, Faculty of Letters, 4-10-28 Higashi, Shibuya-ku, 150-8440 Tokyo, Japan ([email protected]) The “Big Dipper” in Ursa Major was and is the most conspicuous asterism in the northern sky. Furthermore it is circumpolar and could be used as a means for identifying the ...
PDF
... experiments, but then thought of something new: The Kepler spacecraft in its search for extra-‐solar planets might be far better than any of the ground-‐based microlensing searches We were surprised ...
... experiments, but then thought of something new: The Kepler spacecraft in its search for extra-‐solar planets might be far better than any of the ground-‐based microlensing searches We were surprised ...
Influence of the Gould Belt on Interstellar Extinction
... There are regions with a comparatively high interstellar extinction far from the Galactic plane. For example, it can be seen on the (J − Ks) – Ks diagrams for stars from the 2MASS catalog (Skrutskie et al. 2006) with accurate photometry in the J and Ks infrared bands presented in Fig. 1 that the red ...
... There are regions with a comparatively high interstellar extinction far from the Galactic plane. For example, it can be seen on the (J − Ks) – Ks diagrams for stars from the 2MASS catalog (Skrutskie et al. 2006) with accurate photometry in the J and Ks infrared bands presented in Fig. 1 that the red ...
Dynamical Mass Measurements of Pre-Main
... the distance is well known.) Until recently, studies of angularly resolved binaries (“visual binaries,” or VBs) and spectroscopic binaries (SBs) have been entirely disconnected since the binaries detected as SBs had orbital separations that at the distance of star-forming regions fell far below the ...
... the distance is well known.) Until recently, studies of angularly resolved binaries (“visual binaries,” or VBs) and spectroscopic binaries (SBs) have been entirely disconnected since the binaries detected as SBs had orbital separations that at the distance of star-forming regions fell far below the ...
george ellery hale - National Academy of Sciences
... ture of the past. His fondness for poetry began with the Iliad and Odyssey and developed more and more strongly throughout the years; and to his wide reading during his early life must be ascribed the development of his creative imagination, a characteristic which aided and enriched so greatly his l ...
... ture of the past. His fondness for poetry began with the Iliad and Odyssey and developed more and more strongly throughout the years; and to his wide reading during his early life must be ascribed the development of his creative imagination, a characteristic which aided and enriched so greatly his l ...
Red supergiants and the past of Cygnus OB2
... Cygnus OB2. Their location is roughly coincident with that of the older population identified by previous studies, supporting the scenario in which the main star formation activity in the association has been shifting toward higher Galactic longitudes with time. Their luminosities are compared with ...
... Cygnus OB2. Their location is roughly coincident with that of the older population identified by previous studies, supporting the scenario in which the main star formation activity in the association has been shifting toward higher Galactic longitudes with time. Their luminosities are compared with ...
103-122
... spectra are too noisy to permit reliable measurements. The problems are not inherent to the CCD-equipped CASPEC because several investigators have lauded its ability to provide high quality spectra (see Spite, Francois & Spite 1985). We suggest that the totality of present evidence does not demand t ...
... spectra are too noisy to permit reliable measurements. The problems are not inherent to the CCD-equipped CASPEC because several investigators have lauded its ability to provide high quality spectra (see Spite, Francois & Spite 1985). We suggest that the totality of present evidence does not demand t ...
Name of grant holder
... Human Gyroscope rides charged at R5 per 3 minutes. Robotics and coding workshops need to be pre-booked on arrival, all other activities filled on a first-come-first served basis Demonstration of light science Camera Obscura Tour. A role play representing the great Islamic scientist, father of optics ...
... Human Gyroscope rides charged at R5 per 3 minutes. Robotics and coding workshops need to be pre-booked on arrival, all other activities filled on a first-come-first served basis Demonstration of light science Camera Obscura Tour. A role play representing the great Islamic scientist, father of optics ...
Kidd_Thesis_2015April14_Final.
... Cepheid variable stars can be grouped into several classes, such as fundamental-mode, first-overtone, and second-overtone. Each class has distinctive features, and the light curves of the stars can be analyzed for these features in order to be used in automatic classification. Here, we focus on deve ...
... Cepheid variable stars can be grouped into several classes, such as fundamental-mode, first-overtone, and second-overtone. Each class has distinctive features, and the light curves of the stars can be analyzed for these features in order to be used in automatic classification. Here, we focus on deve ...
International Ultraviolet Explorer
The International Ultraviolet Explorer (IUE) was an astronomical observatory satellite primarily designed to take ultraviolet spectra. The satellite was a collaborative project between NASA, the UK Science Research Council and the European Space Agency (ESA). The mission was first proposed in early 1964, by a group of scientists in the United Kingdom, and was launched on January 26, 1978 aboard a NASA Delta rocket. The mission lifetime was initially set for 3 years, but in the end it lasted almost 18 years, with the satellite being shut down in 1996. The switch-off occurred for financial reasons, while the telescope was still functioning at near original efficiency.It was the first space observatory to be operated in real time by astronomers who visited the groundstations in the United States and Europe. Astronomers made over 104,000 observations using the IUE, of objects ranging from solar system bodies to distant quasars. Among the significant scientific results from IUE data were the first large scale studies of stellar winds, accurate measurements of the way interstellar dust absorbs light, and measurements of the supernova SN1987A which showed that it defied stellar evolution theories as they then stood. When the mission ended, it was considered the most successful astronomical satellite ever.