Comet Kirch in Art and Astronomy
... which are used for measuring the altitude of the objects situated above the horizon. In the painting the scientists are measuring the length of the comet’s tail and are estimating its position in the sky. The spectators, women and children among them, are curious and obviously not afraid of this phe ...
... which are used for measuring the altitude of the objects situated above the horizon. In the painting the scientists are measuring the length of the comet’s tail and are estimating its position in the sky. The spectators, women and children among them, are curious and obviously not afraid of this phe ...
Tuomas Kangas
... heavens; and SN 1604, the last SN visually detected in our own galaxy1 . The first extragalactic SN was discovered in 1885 in the Andromeda galaxy. Tycho Brahe and others considered SN 1572 to be the appearance of a new star, nova stella, in the sky. This impression resulted in the widespread use of ...
... heavens; and SN 1604, the last SN visually detected in our own galaxy1 . The first extragalactic SN was discovered in 1885 in the Andromeda galaxy. Tycho Brahe and others considered SN 1572 to be the appearance of a new star, nova stella, in the sky. This impression resulted in the widespread use of ...
Carbon, nitrogen and oxygen abundances in
... 8.31 ± 0.13, log (N) = 7.80 ± 0.12 and log (O) = 8.73 ± 0.13. These values are in very good agreement with recent data on the C, N and O abundances for nearby B stars from other authors; it is important that different techniques are applied by us and other authors. When excluding for the stars HR ...
... 8.31 ± 0.13, log (N) = 7.80 ± 0.12 and log (O) = 8.73 ± 0.13. These values are in very good agreement with recent data on the C, N and O abundances for nearby B stars from other authors; it is important that different techniques are applied by us and other authors. When excluding for the stars HR ...
1 Globular Cluster Systems - McMaster Physics and Astronomy
... size is 4.6 arcmin (or 33 parsecs) across and the image resolution (\seeing") is 0.5 arcsec. Right panel: A globular cluster in the halo of the giant elliptical galaxy NGC 5128, 3900 kiloparsecs from the Milky Way. The picture shown is an I band image taken with the Hubble Space Telescope (see G. Ha ...
... size is 4.6 arcmin (or 33 parsecs) across and the image resolution (\seeing") is 0.5 arcsec. Right panel: A globular cluster in the halo of the giant elliptical galaxy NGC 5128, 3900 kiloparsecs from the Milky Way. The picture shown is an I band image taken with the Hubble Space Telescope (see G. Ha ...
The Evolution of Star Formation Activity in . Cory R. Wagner
... In this thesis, we explore 7.5 billion years of evolution in cluster galaxy star formation activity using a sample of 11 high-redshift (1 < z < 1.5) clusters from the IRAC Shallow Cluster Survey, and 25 low-redshift (0.15 < z < 1) clusters from The Cluster Lensing And Supernova survey with Hubble. W ...
... In this thesis, we explore 7.5 billion years of evolution in cluster galaxy star formation activity using a sample of 11 high-redshift (1 < z < 1.5) clusters from the IRAC Shallow Cluster Survey, and 25 low-redshift (0.15 < z < 1) clusters from The Cluster Lensing And Supernova survey with Hubble. W ...
Giant star seismology
... Asteroseismology – the study of global properties of stars and their internal structure through their global intrinsic oscillations – is already more than a century old. An early remarkable result was obtained for Cepheids revealing the period-luminosity relation (Leavitt and Pickering, 1912), which ...
... Asteroseismology – the study of global properties of stars and their internal structure through their global intrinsic oscillations – is already more than a century old. An early remarkable result was obtained for Cepheids revealing the period-luminosity relation (Leavitt and Pickering, 1912), which ...
Chapter 24
... than possessing a dense central nucleus, they often exhibit little internal structure of any kind. As with spirals, the stellar density increases sharply in the central nucleus. Denoted by the letter E, these systems are subdivided according to how elliptical they appear on the sky. The most circula ...
... than possessing a dense central nucleus, they often exhibit little internal structure of any kind. As with spirals, the stellar density increases sharply in the central nucleus. Denoted by the letter E, these systems are subdivided according to how elliptical they appear on the sky. The most circula ...
Power Point Presentation
... Stars like the Sun go gentle into that good night More massive stars rage, rage against the dying of the light ...
... Stars like the Sun go gentle into that good night More massive stars rage, rage against the dying of the light ...
Observations and Theory of Dynamical Triggers for Star Formation
... M16 (Hester et al. 1996), and M8 (Caulet 1997). Other similar regions have been found in the Sco-Cen association (Bertoldi & Jenkins 1992). Some of these neutral regions may be protostellar disks, as argued in the papers on Orion, but Hester et al. (1996) claims that many are evaporating globules ra ...
... M16 (Hester et al. 1996), and M8 (Caulet 1997). Other similar regions have been found in the Sco-Cen association (Bertoldi & Jenkins 1992). Some of these neutral regions may be protostellar disks, as argued in the papers on Orion, but Hester et al. (1996) claims that many are evaporating globules ra ...
X-Ray Spectroscopy of Stars
... In cooler stars of spectral classes F to M, magnetic coronae, overall analogous to the solar corona, are at the origin of X-rays, enriched by flares in which unstable magnetic fields reconnect and release enormous amounts of energy in a matter of minutes to hours. The presence of coronae in these st ...
... In cooler stars of spectral classes F to M, magnetic coronae, overall analogous to the solar corona, are at the origin of X-rays, enriched by flares in which unstable magnetic fields reconnect and release enormous amounts of energy in a matter of minutes to hours. The presence of coronae in these st ...
Annual Report 2011 - Max Planck Institute for Astrophysics
... In addition to the central MPA computer services, both the Planck Surveyor project and the SDSS group operate their own computer clusters. The former installation is designed in a similar fashion as the general system, and is maintained by an MPA system manager. The SDSS system is MS Windows based, ...
... In addition to the central MPA computer services, both the Planck Surveyor project and the SDSS group operate their own computer clusters. The former installation is designed in a similar fashion as the general system, and is maintained by an MPA system manager. The SDSS system is MS Windows based, ...
A spectroscopic study of detached binary systems using precise radial velocities
... a resolved astrometric orbital solution is also available, the velocities of both stars can allow the binary system’s parallax to be determined, and the velocities of one star can provide a measure of the system mass ratio. Unfortunately, relatively few binary systems are suited to these complementa ...
... a resolved astrometric orbital solution is also available, the velocities of both stars can allow the binary system’s parallax to be determined, and the velocities of one star can provide a measure of the system mass ratio. Unfortunately, relatively few binary systems are suited to these complementa ...
The CCD Photometric Calibration Cookbook
... It is not necessary to read the cookbook sequentially from beginning to end. You can skip some or all of the background material if you are already familiar with it. Similarly, the individual recipes are independent of each other and you can use just the ones appropriate for your purposes. It is als ...
... It is not necessary to read the cookbook sequentially from beginning to end. You can skip some or all of the background material if you are already familiar with it. Similarly, the individual recipes are independent of each other and you can use just the ones appropriate for your purposes. It is als ...
Understanding Variable Stars - Central Florida Astronomical Society
... perspective, an introduction to stars in general, the techniques for discovering and studying variable stars, and a description of the main types of variable stars. It ends with short reflections about the connection between the study of variable stars, and research, education, amateur astronomy, and ...
... perspective, an introduction to stars in general, the techniques for discovering and studying variable stars, and a description of the main types of variable stars. It ends with short reflections about the connection between the study of variable stars, and research, education, amateur astronomy, and ...
Astronomy Astrophysics Gaia-ESO Survey: The analysis of high-resolution The
... E(B − V). The targets selected before April 2012 had a brightest cut on J = 11 instead of 12. When there were not enough targets, the red edge was extended. When there were too many potential targets an algorithm selected roughly the same number of stars per magnitude bin with the rest being marked ...
... E(B − V). The targets selected before April 2012 had a brightest cut on J = 11 instead of 12. When there were not enough targets, the red edge was extended. When there were too many potential targets an algorithm selected roughly the same number of stars per magnitude bin with the rest being marked ...
Science Case for the Chinese Participation of TMT
... Astronomy is the oldest science where curiosities have driven its advancement since the beginning of the mankind. Every man has asked the question: How did the universe begin? Are we alone in the universe? Astonishingly, astronomers are now on the verge of answering these fundamental questions with ...
... Astronomy is the oldest science where curiosities have driven its advancement since the beginning of the mankind. Every man has asked the question: How did the universe begin? Are we alone in the universe? Astonishingly, astronomers are now on the verge of answering these fundamental questions with ...
Earth Centered Universe Pro V6.0
... sell or give away the previous version of the Software. If used on a network, provisions must be made to restrict simultaneous use of the Software to the number of copies purchased or to abide by the terms of a separate site license agreement or license certificate. Reasonable backup copies are perm ...
... sell or give away the previous version of the Software. If used on a network, provisions must be made to restrict simultaneous use of the Software to the number of copies purchased or to abide by the terms of a separate site license agreement or license certificate. Reasonable backup copies are perm ...
Stellar Populations of Dwarf Elliptical Galaxies: UBVRI Photometry
... UBVRI images of 16 dwarf elliptical galaxies in the Virgo Cluster were obtained with the VATT 1.8m on 2003 March 29-31. The telescope was equipped with CCD26, a thinned Loral 3 2048 × 2048 CCD with 15µm pixels. CCD26 has a read noise of 5.7 e− and a gain of 1.9 e− per ADU was used. On-chip binning o ...
... UBVRI images of 16 dwarf elliptical galaxies in the Virgo Cluster were obtained with the VATT 1.8m on 2003 March 29-31. The telescope was equipped with CCD26, a thinned Loral 3 2048 × 2048 CCD with 15µm pixels. CCD26 has a read noise of 5.7 e− and a gain of 1.9 e− per ADU was used. On-chip binning o ...
Circumstellar dust emission from nearby Solar
... Monthly Notices of the Royal Astronomical Society, 416, 1191-1196 (2011) DOI: 10.1111/j.1365-2966.2011.19120.x ...
... Monthly Notices of the Royal Astronomical Society, 416, 1191-1196 (2011) DOI: 10.1111/j.1365-2966.2011.19120.x ...
Cygnus (constellation)
Cygnus /ˈsɪɡnəs/ is a northern constellation lying on the plane of the Milky Way, deriving its name from the Latinized Greek word for swan. The swan is one of the most recognizable constellations of the northern summer and autumn, it features a prominent asterism known as the Northern Cross (in contrast to the Southern Cross). Cygnus was among the 48 constellations listed by the 2nd century astronomer Ptolemy, and it remains one of the 88 modern constellations.Cygnus contains Deneb, one of the brightest stars in the night sky and one corner of the Summer Triangle, as well as some notable X-ray sources and the giant stellar association of Cygnus OB2. One of the stars of this association, NML Cygni, is one of the largest stars currently known. The constellation is also home to Cygnus X-1, a distant X-ray binary containing a supergiant and unseen massive companion that was the first object widely held to be a black hole. Many star systems in Cygnus have known planets as a result of the Kepler Mission observing one patch of the sky, the patch is the area around Cygnus. In addition, most of the eastern part of Cygnus is dominated by the Hercules–Corona Borealis Great Wall, a giant galaxy filament that is the largest known structure in the observable universe; covering most of the northern sky.