Galaxy Assembly through Mergers
... activity when the galaxies are close together, but, contrary to what could have been expected, we find a decrease in the fraction of AGN host galaxies. We interpreted both results as a classification issue, as the veiling of the AGN emission lines by the ...
... activity when the galaxies are close together, but, contrary to what could have been expected, we find a decrease in the fraction of AGN host galaxies. We interpreted both results as a classification issue, as the veiling of the AGN emission lines by the ...
The VIMOS Ultra-Deep Survey (VUDS): Fast Increase in the Fraction
... Deharveng et al. 2008; Hayes et al. 2014). As a result of their nature, Lyα photons are found to be scattered at much larger scales than UV photons (Steidel et al. 2011; Momose et al. 2014). Predicting the escape fraction of the Lyα photons as a function of the galaxy properties involves including a ...
... Deharveng et al. 2008; Hayes et al. 2014). As a result of their nature, Lyα photons are found to be scattered at much larger scales than UV photons (Steidel et al. 2011; Momose et al. 2014). Predicting the escape fraction of the Lyα photons as a function of the galaxy properties involves including a ...
1 Globular Cluster Systems - McMaster Physics and Astronomy
... location of the Galactic center is marked at (16; 0). Lower panel: The spatial distribution in the same plane, according to the best data available today. The tight grouping of clusters near the Galactic center (now at (8; 0)), and the underlying symmetry of the system, are now much more obvious 125 ...
... location of the Galactic center is marked at (16; 0). Lower panel: The spatial distribution in the same plane, according to the best data available today. The tight grouping of clusters near the Galactic center (now at (8; 0)), and the underlying symmetry of the system, are now much more obvious 125 ...
Abstract The Star Formation History of Low Surface Brightness Galaxies
... The star formation histories of low surface brightness galaxies are interesting but poorly constrained. These objects tend to be rather blue, contradicting the initial impression that they may simply be faded remnants of higher surface brightness galaxies whose star formation has finished. Other sce ...
... The star formation histories of low surface brightness galaxies are interesting but poorly constrained. These objects tend to be rather blue, contradicting the initial impression that they may simply be faded remnants of higher surface brightness galaxies whose star formation has finished. Other sce ...
Observations and Theory of Dynamical Triggers for Star Formation
... Table 1. Young embedded or adjacent stars are connected with these globules, but it is uncertain whether this star formation was triggered by compression or was there before. For example, star formation could have occurred in the dense gas independently of the ionization and simply been exposed when ...
... Table 1. Young embedded or adjacent stars are connected with these globules, but it is uncertain whether this star formation was triggered by compression or was there before. For example, star formation could have occurred in the dense gas independently of the ionization and simply been exposed when ...
The Day We Found the Universe
... happily changed to civil reckoning for determining the start of a day. No longer would the astronomical day begin at high noon, a tradition launched in the days of Ptolemy that often led to great bookkeeping confusion. Instead, it now began at midnight, just as it did for everyone else. “It will pro ...
... happily changed to civil reckoning for determining the start of a day. No longer would the astronomical day begin at high noon, a tradition launched in the days of Ptolemy that often led to great bookkeeping confusion. Instead, it now began at midnight, just as it did for everyone else. “It will pro ...
ROSAT Ian R. Stevens* and David K. Strickland*
... (1997) interpreted the power-law emission as being due to a lowluminosity AGN. We have reanalysed both ROSAT PSPC observations, adjusted the pointing using the BL Lac object 1E0331.3–3629 (a strong point source about 12 arcmin off axis). The X-ray/optical image of NGC 1365 is shown in the left panel ...
... (1997) interpreted the power-law emission as being due to a lowluminosity AGN. We have reanalysed both ROSAT PSPC observations, adjusted the pointing using the BL Lac object 1E0331.3–3629 (a strong point source about 12 arcmin off axis). The X-ray/optical image of NGC 1365 is shown in the left panel ...
IRAM Annual Report 2012
... the inner disk layers. These molecules can undergo a variety of reactions on an ice grain mantle to form more complex species. The newly formed molecules can then be released into the gas-phase by thermal evaporation or via induced desorption by ultraviolet radiation and cosmic rays. As the observed ...
... the inner disk layers. These molecules can undergo a variety of reactions on an ice grain mantle to form more complex species. The newly formed molecules can then be released into the gas-phase by thermal evaporation or via induced desorption by ultraviolet radiation and cosmic rays. As the observed ...
Digital Universe Guide - American Museum of Natural History
... Downloading the Atlas AMNH offers the Atlas free of charge via our website, http://www.haydenplanetarium.org/universe/. The User is free to download and/or duplicate verbatim copies of the Atlas provided this license and copyright information accompany the Atlas. Modifying the Atlas The user is free ...
... Downloading the Atlas AMNH offers the Atlas free of charge via our website, http://www.haydenplanetarium.org/universe/. The User is free to download and/or duplicate verbatim copies of the Atlas provided this license and copyright information accompany the Atlas. Modifying the Atlas The user is free ...
... that happen to have a prominent disk around them [and] ellipticals as bulges that for some reason have missed the opportunity to acquire or maintain a prominent disk.” We adopt this point of view. However, as observations improve, we discover more and more features that make it difficult to interpre ...
Observational Studies of Interacting Galaxies and the Development
... photometric studies better constrain the number density evolution of wet and dry mergers through five CFHTLS broad band photometry up to z ∼ 1. Meanwhile, by comparing the merger and elliptical galaxy mass density function, I discovered that the most massive mergers are not all formed via merging pr ...
... photometric studies better constrain the number density evolution of wet and dry mergers through five CFHTLS broad band photometry up to z ∼ 1. Meanwhile, by comparing the merger and elliptical galaxy mass density function, I discovered that the most massive mergers are not all formed via merging pr ...
Luminosity profiles and sizes of massive star clusters in NGC 7252
... of three of the most massive clusters out to distances of more than 150 pc from the cluster centres. Specifically, our main goal was to see whether the cluster profiles are truncated and, if not, how far they extend. We were also interested in studying whether the presence or absence of any extended ...
... of three of the most massive clusters out to distances of more than 150 pc from the cluster centres. Specifically, our main goal was to see whether the cluster profiles are truncated and, if not, how far they extend. We were also interested in studying whether the presence or absence of any extended ...
Niraj D. Welikala Thesis - D-Scholarship@Pitt
... The role of star formation in galaxies is clearly a fundamental component of their evolution, although it is becoming clear that galaxy environments may also play a significant role. To explore the relationship between environment and star formation in galaxies, I use the photometric information con ...
... The role of star formation in galaxies is clearly a fundamental component of their evolution, although it is becoming clear that galaxy environments may also play a significant role. To explore the relationship between environment and star formation in galaxies, I use the photometric information con ...
A Teacher`s Guide to the Universe
... http://www.astro.princeton.edu/~clark/teachersguide.html (1 of 2) [1/31/2001 10:42:38 AM] ...
... http://www.astro.princeton.edu/~clark/teachersguide.html (1 of 2) [1/31/2001 10:42:38 AM] ...
Power Point Presentation
... collapses and explodes Decay time of light curve is correlated to absolute luminosity Luminosity comes from the radioactive decay of Cobalt and Nickel into Iron Some Type Ia supernovae are in galaxies with Cepheid variables Good to 20% as a distance measure March 11, 2003 ...
... collapses and explodes Decay time of light curve is correlated to absolute luminosity Luminosity comes from the radioactive decay of Cobalt and Nickel into Iron Some Type Ia supernovae are in galaxies with Cepheid variables Good to 20% as a distance measure March 11, 2003 ...
GRB prompt emission
... Allowed Astronomers To watch the bursts Fade, and then Study their Host Galaxy! ...
... Allowed Astronomers To watch the bursts Fade, and then Study their Host Galaxy! ...
GRB prompt emission
... Allowed Astronomers To watch the bursts Fade, and then Study their Host Galaxy! ...
... Allowed Astronomers To watch the bursts Fade, and then Study their Host Galaxy! ...
probing quasar environments with tunable filter
... MRC B1256-243 lack the sensitivity to probe deep into the quasar environment, but detect a number of extremely luminous objects. In BR B0019-1522, we show convincing evidence of a protocluster, including both galaxy and star formation rate densities an order of magnitude higher than that observed in ...
... MRC B1256-243 lack the sensitivity to probe deep into the quasar environment, but detect a number of extremely luminous objects. In BR B0019-1522, we show convincing evidence of a protocluster, including both galaxy and star formation rate densities an order of magnitude higher than that observed in ...
Star Formation in the Milky Way and Nearby Galaxies Further
... between the community studying individual star-forming regions and stars in the Milky Way (MW; also sometimes referred to as the Galaxy) and the largely extragalactic community that attempts to characterize the star-formation process on galactic and cosmological scales. Some aspects of this separati ...
... between the community studying individual star-forming regions and stars in the Milky Way (MW; also sometimes referred to as the Galaxy) and the largely extragalactic community that attempts to characterize the star-formation process on galactic and cosmological scales. Some aspects of this separati ...
the stebbins galaxy: the origins of interstellar medium studies
... Abstract: The development of photoelectric photometry as an observational technique by Joel Stebbins and his colleagues at the University of Wisconsin‘s Washburn Observatory made possible, in the early 1930s, a new approach to the effects, extent, and nature of interstellar matter. In a series of pa ...
... Abstract: The development of photoelectric photometry as an observational technique by Joel Stebbins and his colleagues at the University of Wisconsin‘s Washburn Observatory made possible, in the early 1930s, a new approach to the effects, extent, and nature of interstellar matter. In a series of pa ...
IRAM Annual Report 2011
... COLD CORE CHEMISTRY UNRAVELED Star formation begins with the gravitational collapse of over-dense cold molecular clouds. To constrain the chemistry in clouds that offers the opportunity to reach scales by which to separate individual collapsing starless cores, Frau (CSIC/IEEC) and collaborators have ...
... COLD CORE CHEMISTRY UNRAVELED Star formation begins with the gravitational collapse of over-dense cold molecular clouds. To constrain the chemistry in clouds that offers the opportunity to reach scales by which to separate individual collapsing starless cores, Frau (CSIC/IEEC) and collaborators have ...
JENAM-2011 Book of abstracts
... was launched in 1989 (already more than 20 years ago) with the final Hipparcos and Tycho Catalogues fully published just eight years later. Exceeding the original scientific specifications in terms of both accuracy and in numbers of objects measured, Hipparcos provided not only by far the best stellar ...
... was launched in 1989 (already more than 20 years ago) with the final Hipparcos and Tycho Catalogues fully published just eight years later. Exceeding the original scientific specifications in terms of both accuracy and in numbers of objects measured, Hipparcos provided not only by far the best stellar ...
Galaxy Disks Further
... Disks are the most prominent parts of late-type spiral galaxies. The disk of our own Milky Way Galaxy stretches as a magnificent band of light from horizon to horizon, particularly from a dark site at southern latitudes, as in the Astronomy Picture of the Day for January 27, 2009 (Pacholka 2009). It ...
... Disks are the most prominent parts of late-type spiral galaxies. The disk of our own Milky Way Galaxy stretches as a magnificent band of light from horizon to horizon, particularly from a dark site at southern latitudes, as in the Astronomy Picture of the Day for January 27, 2009 (Pacholka 2009). It ...
environmental effects on galaxy evolution in nearby clusters
... The environmental effects on galaxy evolution in nearby clusters are investigated using a multiwavelength dataset. The present analysis is focused on the properties of three (Abell 1367, Virgo and Coma) among the best studied clusters in the local Universe. Due to the variety of their environmental ...
... The environmental effects on galaxy evolution in nearby clusters are investigated using a multiwavelength dataset. The present analysis is focused on the properties of three (Abell 1367, Virgo and Coma) among the best studied clusters in the local Universe. Due to the variety of their environmental ...
The most metal-poor galaxies
... of a galaxy requires some words of caution because in a given galaxy, depending on where one looks, this quantity may vary substantially. For example in our Galaxy, the bulge, the solar neighbourhood and the halo differ in metallicity. The most metal-poor halo stars have heavy element abundances 10 ...
... of a galaxy requires some words of caution because in a given galaxy, depending on where one looks, this quantity may vary substantially. For example in our Galaxy, the bulge, the solar neighbourhood and the halo differ in metallicity. The most metal-poor halo stars have heavy element abundances 10 ...