PDF - STRW Local - Universiteit Leiden
... ways to search for faint planets orbiting bright stars. This is enabled using liquid crystals in coronagraphs reaching extremely high image contrasts. Jarle Brinchmann shows some of the fantastic first results from the new Multi Unit Spectroscopic Exoplorer (MUSE) on the Very Large Telescope of the ...
... ways to search for faint planets orbiting bright stars. This is enabled using liquid crystals in coronagraphs reaching extremely high image contrasts. Jarle Brinchmann shows some of the fantastic first results from the new Multi Unit Spectroscopic Exoplorer (MUSE) on the Very Large Telescope of the ...
- Isaac Newton Group of Telescopes
... formed about a hundred million years ago at a distance of approximately 400 light years (3780 billion kilometers) from the Sun, is considered to be one of the most suitable astronomical sources for the detection, and the subsequent study of brown dwarfs. At such early ages, these objects ...
... formed about a hundred million years ago at a distance of approximately 400 light years (3780 billion kilometers) from the Sun, is considered to be one of the most suitable astronomical sources for the detection, and the subsequent study of brown dwarfs. At such early ages, these objects ...
Initial performance of the aspect system on the Chandra
... instruments were perfect, the reconstructed image of an X-ray point source anywhere within the central 5 arcminute radius eld of view will have an RMS diameter of less than 0.5 arcsec. This translates to a one-axis 1- value of 0.177 arcsec. To assess actual perfomance versus this requirement, we e ...
... instruments were perfect, the reconstructed image of an X-ray point source anywhere within the central 5 arcminute radius eld of view will have an RMS diameter of less than 0.5 arcsec. This translates to a one-axis 1- value of 0.177 arcsec. To assess actual perfomance versus this requirement, we e ...
The Birth of a Supernova Seen in Real Time
... VLBI since it may enable us to actually resolve the ejecta. Along this line, we obtained VLBA observations of SN 2008D at 1 month after the explosion (Figure 2). While the relativistic ejecta from a GRB or XRF would be easily resolved in this observation, the non-relativistic material form an ordina ...
... VLBI since it may enable us to actually resolve the ejecta. Along this line, we obtained VLBA observations of SN 2008D at 1 month after the explosion (Figure 2). While the relativistic ejecta from a GRB or XRF would be easily resolved in this observation, the non-relativistic material form an ordina ...
Anatomy of a Supernova - hrsbstaff.ednet.ns.ca
... accommodate subtuminous supernovae if the deflagration-todetonation transition comes late enough. However, astronomers are still not sure about overluminous supernovae. The basic problem is figuring out how any explosion can make enough nickel-56 — nearly one solar mass — to power such a bright supe ...
... accommodate subtuminous supernovae if the deflagration-todetonation transition comes late enough. However, astronomers are still not sure about overluminous supernovae. The basic problem is figuring out how any explosion can make enough nickel-56 — nearly one solar mass — to power such a bright supe ...
The fate of black hole singularities and the parameters of the
... seems to be the following. i) N (p) is strongly sensitive to every cosmological parameter and to every particle physics parameter that determines the properties of stable matter. ii) No argument has so far been found for a small change in any parameter leading to an increase in the number of black h ...
... seems to be the following. i) N (p) is strongly sensitive to every cosmological parameter and to every particle physics parameter that determines the properties of stable matter. ii) No argument has so far been found for a small change in any parameter leading to an increase in the number of black h ...
A Budget and Accounting of Metals at z~ 0: Results from the COS
... galaxies, although it does predict too much downsizing for M⋆,0 . 109 M⊙ galaxies (i.e., it predicts that these dwarf galaxies have formed all of their stars at late times, contrary to what is observed). Fortuitously, the bulk of 9 Throughout this paper, when we refer to the mass of metals “made”, “ ...
... galaxies, although it does predict too much downsizing for M⋆,0 . 109 M⊙ galaxies (i.e., it predicts that these dwarf galaxies have formed all of their stars at late times, contrary to what is observed). Fortuitously, the bulk of 9 Throughout this paper, when we refer to the mass of metals “made”, “ ...
Annual Report 2006/2007
... supernova remnant Cassiopeia A (Cas A). This object is the brightest radio source in the sky, and has been created by a supernova explosion about 330 year ago. The star itself had a mass of around 20 times the mass of the sun, but by the time it exploded it must have lost most of the outer layers. T ...
... supernova remnant Cassiopeia A (Cas A). This object is the brightest radio source in the sky, and has been created by a supernova explosion about 330 year ago. The star itself had a mass of around 20 times the mass of the sun, but by the time it exploded it must have lost most of the outer layers. T ...
D ASTROPHYSICS
... consist of a concentrated core and are spherical in shape. Irregular clusters also exist, with no apparent shape and a lower concentration of galaxies within them. Since the launch of the Hubble Space Telescope it has been observed that even larger structures, called superclusters, form a network of ...
... consist of a concentrated core and are spherical in shape. Irregular clusters also exist, with no apparent shape and a lower concentration of galaxies within them. Since the launch of the Hubble Space Telescope it has been observed that even larger structures, called superclusters, form a network of ...
Suppose you tried to determine where we are in the galaxy by
... We don't know the masses of stars well. 90% of the galaxy is hidden from view. There must be some other kind of matter in the galaxy that we cannot see. e) C and D ...
... We don't know the masses of stars well. 90% of the galaxy is hidden from view. There must be some other kind of matter in the galaxy that we cannot see. e) C and D ...
Chapter 15
... the hydrogen fuel in its core to make helium. The helium is basically just sitting there, so it's not producing any energy. Instead, the core is shrinking and getting hotter. Before long, it'll get hot enough to ignite the helium, which will begin fusing together to make heavier elements. When that ...
... the hydrogen fuel in its core to make helium. The helium is basically just sitting there, so it's not producing any energy. Instead, the core is shrinking and getting hotter. Before long, it'll get hot enough to ignite the helium, which will begin fusing together to make heavier elements. When that ...
Constraints on Long-Period Planets from an L
... is the only method that allows us to characterize them immediately. Direct imaging of extrasolar planets is technologically possible at present only in the infrared, based on the planets’ own thermal luminosity, not on reflected starlight. The enabling technology is adaptive optics (AO), which allow ...
... is the only method that allows us to characterize them immediately. Direct imaging of extrasolar planets is technologically possible at present only in the infrared, based on the planets’ own thermal luminosity, not on reflected starlight. The enabling technology is adaptive optics (AO), which allow ...
Sensing the Radio Sky
... But not all astronomers are optical astronomers. Some astronomers are radio astronomers, which means that they study the radio wavelengths emitted by objects in our universe. Radio wavelengths are 1/10 of a meter or longer, which means that they are much longer than visible wavelengths. Since our ey ...
... But not all astronomers are optical astronomers. Some astronomers are radio astronomers, which means that they study the radio wavelengths emitted by objects in our universe. Radio wavelengths are 1/10 of a meter or longer, which means that they are much longer than visible wavelengths. Since our ey ...
Next Generation Sunshine State Standards Chapter 24
... two and one half times. Also on this scale, the nearest galaxy lies 60 billion kilometers away. These facts suggest that the universe is incomprehensibly large. It is also incomprehensibly empty, containing on average about one hydrogen atom per cubic centimeter. Astronomers and cosmologists* study ...
... two and one half times. Also on this scale, the nearest galaxy lies 60 billion kilometers away. These facts suggest that the universe is incomprehensibly large. It is also incomprehensibly empty, containing on average about one hydrogen atom per cubic centimeter. Astronomers and cosmologists* study ...
margarita2007
... the heat radiation of the Big Bang and the large scale distribution of galaxies. ...
... the heat radiation of the Big Bang and the large scale distribution of galaxies. ...
Lyman-α: The Many Applications and Challenges of This Powerful
... density ratio (D/H), which is an important test of the density of ordinary matter and the creation of H, D, and He in the very early Universe. Since, the observed D/H ratios in the Galactic disk gas are altered by many competing processes, sorting out these processes requires accurate D/H measuremen ...
... density ratio (D/H), which is an important test of the density of ordinary matter and the creation of H, D, and He in the very early Universe. Since, the observed D/H ratios in the Galactic disk gas are altered by many competing processes, sorting out these processes requires accurate D/H measuremen ...
How Marius Was Right and Galileo Was Wrong Even Though
... are manifestations of the Airy disk formed by the telescope. All stars have the same Airy disk diameter, which is a function only of wavelength and telescope aperture. ...
... are manifestations of the Airy disk formed by the telescope. All stars have the same Airy disk diameter, which is a function only of wavelength and telescope aperture. ...
Mark Scheme (Results) Summer 2014
... appeared when the {Big Bang happened / universe started}(1) MP2 the Universe is older than the oldest star ...
... appeared when the {Big Bang happened / universe started}(1) MP2 the Universe is older than the oldest star ...
Hubble Deep Field
The Hubble Deep Field (HDF) is an image of a small region in the constellation Ursa Major, constructed from a series of observations by the Hubble Space Telescope. It covers an area 2.5 arcminutes across, about one 24-millionth of the whole sky, which is equivalent in angular size to a 65 mm tennis ball at a distance of 100 metres. The image was assembled from 342 separate exposures taken with the Space Telescope's Wide Field and Planetary Camera 2 over ten consecutive days between December 18 and December 28, 1995.The field is so small that only a few foreground stars in the Milky Way lie within it; thus, almost all of the 3,000 objects in the image are galaxies, some of which are among the youngest and most distant known. By revealing such large numbers of very young galaxies, the HDF has become a landmark image in the study of the early universe, with the associated scientific paper having received over 900 citations by the end of 2014.Three years after the HDF observations were taken, a region in the south celestial hemisphere was imaged in a similar way and named the Hubble Deep Field South. The similarities between the two regions strengthened the belief that the universe is uniform over large scales and that the Earth occupies a typical region in the Universe (the cosmological principle). A wider but shallower survey was also made as part of the Great Observatories Origins Deep Survey. In 2004 a deeper image, known as the Hubble Ultra-Deep Field (HUDF), was constructed from a few months of light exposure. The HUDF image was at the time the most sensitive astronomical image ever made at visible wavelengths, and it remained so until the Hubble Extreme Deep Field (XDF) was released in 2012.