Corrugations in the Disk of the Edge
... lying within the boundaries of the stellar disk (i.e., excluding the outer disk regions where warping dominates the vertical structure). Gaps in the corrugation plots near x ≈ 50 00 − 7000 at some wavelengths are due to contamination from a foreground star. Figure 1 illustrates that excursions from ...
... lying within the boundaries of the stellar disk (i.e., excluding the outer disk regions where warping dominates the vertical structure). Gaps in the corrugation plots near x ≈ 50 00 − 7000 at some wavelengths are due to contamination from a foreground star. Figure 1 illustrates that excursions from ...
Chapter 17 - Astronomy
... with this method is that it is difficult to determine the angle of the plane of revolution to our line of sight. Clusters of Galaxies; Missing Mass 1. Most galaxies are part of clusters. A cluster of galaxies is a gravitationally linked assemblage. 2. The local group of galaxies is a cluster of over ...
... with this method is that it is difficult to determine the angle of the plane of revolution to our line of sight. Clusters of Galaxies; Missing Mass 1. Most galaxies are part of clusters. A cluster of galaxies is a gravitationally linked assemblage. 2. The local group of galaxies is a cluster of over ...
Ionized gas discs in elliptical and S0 galaxies at z < 1
... into the cluster, clearly indicating that the transformation of spirals to S0s is accelerated by cluster environment. All of the above-mentioned studies however have been done at low redshift. In this paper, we present, for the first time, observational evidence for extended emission discs in ETGs a ...
... into the cluster, clearly indicating that the transformation of spirals to S0s is accelerated by cluster environment. All of the above-mentioned studies however have been done at low redshift. In this paper, we present, for the first time, observational evidence for extended emission discs in ETGs a ...
Lokal fulltext - Chalmers Publication Library
... This dust cloud is of course affected by the radiation field from the central star in several ways. One result being that the cloud will be easily heated so that it will exhibit black body-like emission. With sufficient amount of dust being heated this will lead to observable excesses at far-infrare ...
... This dust cloud is of course affected by the radiation field from the central star in several ways. One result being that the cloud will be easily heated so that it will exhibit black body-like emission. With sufficient amount of dust being heated this will lead to observable excesses at far-infrare ...
ESA BR-170 - ESA Science
... planet Uranus a few years earlier – described that the differently coloured filters through which he observed the Sun allowed different levels of heat to pass. He performed a simple experiment to study the “heating powers of coloured rays”: he split the sunlight with a glass prism into its different ...
... planet Uranus a few years earlier – described that the differently coloured filters through which he observed the Sun allowed different levels of heat to pass. He performed a simple experiment to study the “heating powers of coloured rays”: he split the sunlight with a glass prism into its different ...
High Resolution Chandra Spectroscopy of Gamma Cassiopeia (B0
... while the remainder is affected by only a much lower column density of 3×1021 cm−2 . The hot component has a Fe abundance of only 0.22±.05 solar. The other two or three major emission components are “warm” and are responsible for most other emission lines. These components are dominated by plasma ha ...
... while the remainder is affected by only a much lower column density of 3×1021 cm−2 . The hot component has a Fe abundance of only 0.22±.05 solar. The other two or three major emission components are “warm” and are responsible for most other emission lines. These components are dominated by plasma ha ...
SPICA Yellow Book
... the physics and chemistry of planet formation. To obtain this increase in sensitivity we need a cold (< 6 K) telescope of about the same diameter as Herschel. The Japanese led SPace Infrared telescope for Cosmology and Astrophysics (SPICA) mission promises this in early 2020s and Europe can play a v ...
... the physics and chemistry of planet formation. To obtain this increase in sensitivity we need a cold (< 6 K) telescope of about the same diameter as Herschel. The Japanese led SPace Infrared telescope for Cosmology and Astrophysics (SPICA) mission promises this in early 2020s and Europe can play a v ...
Document
... - The galaxy masses have been estimated from their SED - z~2 obscured AGNs have MBH/Mstar lower than the local relation, in contrast with unobscured AGNs ...
... - The galaxy masses have been estimated from their SED - z~2 obscured AGNs have MBH/Mstar lower than the local relation, in contrast with unobscured AGNs ...
PHYS3380_113015_bw - The University of Texas at Dallas
... Stephen Hawking showed that black holes are not entirely black but emit small amounts of thermal radiation. - applied quantum field theory in a static black hole background. - result - a black hole should emit particles in a perfect black body spectrum. - Hawking radiation. Virtual particle pairs co ...
... Stephen Hawking showed that black holes are not entirely black but emit small amounts of thermal radiation. - applied quantum field theory in a static black hole background. - result - a black hole should emit particles in a perfect black body spectrum. - Hawking radiation. Virtual particle pairs co ...
Galaxies: Interactions and Mergers Encyclopedia of Astronomy & Astrophysics eaa.iop.org C Mihos
... Figure 2. An N -body model of two equal-mass merging disk galaxies. Time is shown in the upper left of each panel, where unit time is ∼10 million years. After first collision at T ∼ 24, the galaxies pass by one another before turning around on their orbits and merging to form an elliptical-like obje ...
... Figure 2. An N -body model of two equal-mass merging disk galaxies. Time is shown in the upper left of each panel, where unit time is ∼10 million years. After first collision at T ∼ 24, the galaxies pass by one another before turning around on their orbits and merging to form an elliptical-like obje ...
Missions
... objects was published, including thousands of intriguing objects never seen before. A few years later more observations revealed the existence of distant galaxies whose radiation is stronger in the infrared than in the visible. There was no immediate explanation for this. Astronomers were seeing a q ...
... objects was published, including thousands of intriguing objects never seen before. A few years later more observations revealed the existence of distant galaxies whose radiation is stronger in the infrared than in the visible. There was no immediate explanation for this. Astronomers were seeing a q ...
Star Clusters - Caltech Astronomy
... Open clusters Some 1200 open clusters have been catalogued, but as many as 250 of these appear to be simply slight enhancements in the stellar density along a line of sight or small asterisms of unrelated stars. Such asterisms should not be considered as clusters by either of the definitions of clus ...
... Open clusters Some 1200 open clusters have been catalogued, but as many as 250 of these appear to be simply slight enhancements in the stellar density along a line of sight or small asterisms of unrelated stars. Such asterisms should not be considered as clusters by either of the definitions of clus ...
103-122
... An assumption that the intrinsic scatter in [α /Fe] for halo stars is small is not necessarily compatible with the theories of Galactic chemical evolution. If the αelements and the iron-group are synthesized in different stars, and gas clouds in the early Galaxy were poorly mixed, one may expect, as ...
... An assumption that the intrinsic scatter in [α /Fe] for halo stars is small is not necessarily compatible with the theories of Galactic chemical evolution. If the αelements and the iron-group are synthesized in different stars, and gas clouds in the early Galaxy were poorly mixed, one may expect, as ...
The UV properties of E+ A galaxies: constraints on feedback
... Several plausible explanations for the E+A phenomenon have been proposed and studies indicate that there are multiple channels for creating such post-starburst spectral signatures. Since E+A galaxies were first detected in clusters, it was initially thought that their production required a cluster-s ...
... Several plausible explanations for the E+A phenomenon have been proposed and studies indicate that there are multiple channels for creating such post-starburst spectral signatures. Since E+A galaxies were first detected in clusters, it was initially thought that their production required a cluster-s ...
A noble record
... than 0.03% of the total meteoritic mass. Q accounts for all of the noble gases in meteorites that do not belong to presolar grains, implanted solar wind, or matter of cosmogenic or radiogenic origin (the latter two discussed below). To this day, the identification of Q remains elusive and only its e ...
... than 0.03% of the total meteoritic mass. Q accounts for all of the noble gases in meteorites that do not belong to presolar grains, implanted solar wind, or matter of cosmogenic or radiogenic origin (the latter two discussed below). To this day, the identification of Q remains elusive and only its e ...
Notes on Stars
... extinction is largely proportional to the column density of the interstellar gas between us and the object. For distant stars and extragalactic objects, the so-called Galactic infrared cirrus is a good indicator of extinction as it is produced by the thermal emission of the dust in the MIlky Way. Th ...
... extinction is largely proportional to the column density of the interstellar gas between us and the object. For distant stars and extragalactic objects, the so-called Galactic infrared cirrus is a good indicator of extinction as it is produced by the thermal emission of the dust in the MIlky Way. Th ...
Astronomy Astrophysics
... rotation axis under which the star is seen. The long-term photometry of the young single star LQ Hya, although not included in the initial project, is also used in the present analysis to enlarge the investigated sample. We determined for LQ Hya three different starspot cycles and an antisolar patte ...
... rotation axis under which the star is seen. The long-term photometry of the young single star LQ Hya, although not included in the initial project, is also used in the present analysis to enlarge the investigated sample. We determined for LQ Hya three different starspot cycles and an antisolar patte ...
Star formation
Star formation is the process by which dense regions within molecular clouds in interstellar space, sometimes referred to as ""stellar nurseries"" or ""star-forming regions"", collapse to form stars. As a branch of astronomy, star formation includes the study of the interstellar medium (ISM) and giant molecular clouds (GMC) as precursors to the star formation process, and the study of protostars and young stellar objects as its immediate products. It is closely related to planet formation, another branch of astronomy. Star formation theory, as well as accounting for the formation of a single star, must also account for the statistics of binary stars and the initial mass function.In June 2015, astronomers reported evidence for Population III stars in the Cosmos Redshift 7 galaxy at z = 6.60. Such stars are likely to have existed in the very early universe (i.e., at high redshift), and may have started the production of chemical elements heavier than hydrogen that are needed for the later formation of planets and life as we know it.