Niraj D. Welikala Thesis - D-Scholarship@Pitt
... and on these scales the density fluctuations are small in size (rms fluctuations of the order ∼ 0.1 at 1 Gpc). However, on scales of the order of 10 Mpc, the density fluctuations are large (∼ 1). The most apparent overdensities are therefore on small scales, less than 10 Mpc which are the typical sc ...
... and on these scales the density fluctuations are small in size (rms fluctuations of the order ∼ 0.1 at 1 Gpc). However, on scales of the order of 10 Mpc, the density fluctuations are large (∼ 1). The most apparent overdensities are therefore on small scales, less than 10 Mpc which are the typical sc ...
Starry Night Pro User`s Guide - Simulation Curriculum Support
... The invention of desktop astronomy software has been the most exciting new development in the astronomy hobby in years, perhaps since that night four centuries ago when Galileo pointed the newly invented telescope at the heavens for the first time! Starry Night Pro 5.0 is the premier astronomy softw ...
... The invention of desktop astronomy software has been the most exciting new development in the astronomy hobby in years, perhaps since that night four centuries ago when Galileo pointed the newly invented telescope at the heavens for the first time! Starry Night Pro 5.0 is the premier astronomy softw ...
IAA Annual Report 2014
... partner. The Rosetta mission is producing a welth of new science, with excellent results published in high impact papers. ESA’s new mission PLATO was approved in 2014, and IAA will participate in the construction of its instrumentation. PLATO, planned to launch in 2024, is to begin a completely new ...
... partner. The Rosetta mission is producing a welth of new science, with excellent results published in high impact papers. ESA’s new mission PLATO was approved in 2014, and IAA will participate in the construction of its instrumentation. PLATO, planned to launch in 2024, is to begin a completely new ...
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 ...
The visibility of Lyman Alpha Emitters: constraining reionization
... This work is quite close in spirit to the calculations presented in Dayal et al. (2011) wherein the authors used (a) cosmological hydrodynamic simulations run with GADGET-2 to obtain the physical properties of z ≃ 5.7 galaxies, (b) a dust model that took into account the entire star formation histor ...
... This work is quite close in spirit to the calculations presented in Dayal et al. (2011) wherein the authors used (a) cosmological hydrodynamic simulations run with GADGET-2 to obtain the physical properties of z ≃ 5.7 galaxies, (b) a dust model that took into account the entire star formation histor ...
An X-Ray, Optical and Infra-red study of High-Mass X
... The known population of high-mass X-ray binaries in the Small Magellanic Cloud is continually growing and is now a similar size to that of the Milky Way, despite a significant mass difference between the two galaxies. In this thesis, I present multi-wavelength observations of Be/X-ray binaries that ...
... The known population of high-mass X-ray binaries in the Small Magellanic Cloud is continually growing and is now a similar size to that of the Milky Way, despite a significant mass difference between the two galaxies. In this thesis, I present multi-wavelength observations of Be/X-ray binaries that ...
X-Ray Spectroscopy of Stars
... 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 stars testifies to the operation of an internal dynamo that generates the magnetic fields ...
... 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 stars testifies to the operation of an internal dynamo that generates the magnetic fields ...
Observations and Theory of Dynamical Triggers for Star Formation
... (1986), Boss (1995), Cameron, et al. (1995), and Valhala, Cameron, & Hoflich, (1996). Boss considered slow stellar winds for the triggering, and the others considered supernovae. These triggering mechanisms may also have applications to star formation in galactic spiral arms. The need for such trigg ...
... (1986), Boss (1995), Cameron, et al. (1995), and Valhala, Cameron, & Hoflich, (1996). Boss considered slow stellar winds for the triggering, and the others considered supernovae. These triggering mechanisms may also have applications to star formation in galactic spiral arms. The need for such trigg ...
The Evolution of Star Formation Activity in . Cory R. Wagner
... 2006; Clemens et al. 2009; Edwards & Fadda 2011). Studies of cluster galaxy populations to z . 1 find that the evolution in the color and scatter of cluster red-sequences is consistent with simple passive evolution models in which the bulk of galaxies’ stars formed in a short, high-redshift starburs ...
... 2006; Clemens et al. 2009; Edwards & Fadda 2011). Studies of cluster galaxy populations to z . 1 find that the evolution in the color and scatter of cluster red-sequences is consistent with simple passive evolution models in which the bulk of galaxies’ stars formed in a short, high-redshift starburs ...
Word doc - Infinity Internet
... Adams, George. Astronomical & geographical essays: containing, I. A full and comprehensive view, on a new plan, of the general principles of astronomy. II. The use of the celestial and terrestrial globes, exemplified in a greater variety of problems, than are to be found in any other work. III. The ...
... Adams, George. Astronomical & geographical essays: containing, I. A full and comprehensive view, on a new plan, of the general principles of astronomy. II. The use of the celestial and terrestrial globes, exemplified in a greater variety of problems, than are to be found in any other work. III. The ...
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 ...
A spectroscopic study of detached binary systems using precise radial velocities
... can deduce the angular dimensions of the orbit, the total mass of the system, and sometimes, its distance from us. Spectroscopy, on the other hand, can determine the linear scale of the orbit and the ratio of the stellar masses, based on the changing radial velocities of both stars. When a resolved ...
... can deduce the angular dimensions of the orbit, the total mass of the system, and sometimes, its distance from us. Spectroscopy, on the other hand, can determine the linear scale of the orbit and the ratio of the stellar masses, based on the changing radial velocities of both stars. When a resolved ...
The properties of a spectroscopically selected sample of cataclysmic variables Amornrat Aungwerojwit
... I would like to thank Dr. Boris G¨ansicke for being a superb supervisor in guiding me during my PhD. Without his useful suggestions, constructive comments, kindness, and patience, the work presented in this thesis could not have been satisfactory. I am grateful for his enthusiasm, which has inspired ...
... I would like to thank Dr. Boris G¨ansicke for being a superb supervisor in guiding me during my PhD. Without his useful suggestions, constructive comments, kindness, and patience, the work presented in this thesis could not have been satisfactory. I am grateful for his enthusiasm, which has inspired ...
ROSAT Ian R. Stevens* and David K. Strickland*
... principally because of its interesting X-ray properties and the light that they shed on the nature of NGC 1365. Also, a fuller discussion of the multiwavelength properties of NGC 1365 will be presented in Stevens, Forbes & Norris (1998). NGC 1365 was detected with Einstein with an X-ray luminosity o ...
... principally because of its interesting X-ray properties and the light that they shed on the nature of NGC 1365. Also, a fuller discussion of the multiwavelength properties of NGC 1365 will be presented in Stevens, Forbes & Norris (1998). NGC 1365 was detected with Einstein with an X-ray luminosity o ...
The correlation between galaxy morphology and star
... et al. 2008). This is generally explained as due to the fact that UV radiation predominantly traces emission from the star-forming regions (Dickinson 2000), which tend to be more clumped and irregularly distributed than older stellar populations, and also by the fact that quenched galaxies were miss ...
... et al. 2008). This is generally explained as due to the fact that UV radiation predominantly traces emission from the star-forming regions (Dickinson 2000), which tend to be more clumped and irregularly distributed than older stellar populations, and also by the fact that quenched galaxies were miss ...
Neutrino Astrophysics
... was the apparent absence of energy conservation in nuclear β decay that first lead Wolfgang Pauli, more than 80 years ago, to suggest that some undetected neutral particle (the νe ) must be escaping from nuclear β decay experiments. Neutrinos play a very special role in astrophysics [2]. First, they ...
... was the apparent absence of energy conservation in nuclear β decay that first lead Wolfgang Pauli, more than 80 years ago, to suggest that some undetected neutral particle (the νe ) must be escaping from nuclear β decay experiments. Neutrinos play a very special role in astrophysics [2]. First, they ...
General NG Celestial Questions
... In order for a star to be used for a sight at lower transit, the star must __________. A. be circumpolar B. have a declination equal to or greater than your latitude C. have a GHA of 180° D. have the SHA equal to or less than the LHA ...
... In order for a star to be used for a sight at lower transit, the star must __________. A. be circumpolar B. have a declination equal to or greater than your latitude C. have a GHA of 180° D. have the SHA equal to or less than the LHA ...
2012 December Vol. 49 No 584
... Supernova 2009ip in NGC 7259 On CBET 1928 issued on 2009 August 29, the discovery of supernova 2009ip in NGC 7259 was reported by J. Maza et. al. during the course of the CHASE project. The object, of then magnitude 17.9 was recorded on 2009 Aug 26 at: RA 22h 23m 08.26s DEC -28° 56' 52.4” (2000), ab ...
... Supernova 2009ip in NGC 7259 On CBET 1928 issued on 2009 August 29, the discovery of supernova 2009ip in NGC 7259 was reported by J. Maza et. al. during the course of the CHASE project. The object, of then magnitude 17.9 was recorded on 2009 Aug 26 at: RA 22h 23m 08.26s DEC -28° 56' 52.4” (2000), ab ...
CoRoT III programme
... yet and their evolution is the driver of the chemical evolution of the galaxy. Since CoRoT can, contrary to Kepler, observe two very different regions of the Galaxy, it will test whether the planetary system characteristics and star-to-planet ratio are the same in these two regions. In its seismolog ...
... yet and their evolution is the driver of the chemical evolution of the galaxy. Since CoRoT can, contrary to Kepler, observe two very different regions of the Galaxy, it will test whether the planetary system characteristics and star-to-planet ratio are the same in these two regions. In its seismolog ...
German LOFAR - LOFAR at MPA
... a fast supercomputer, where one or several large telescope are synthesized in real time. This offers the additional benefit of an enormous flexibility as one can steer an electronic beam across the sky within microseconds, look back in time if data is buffered to see explosive events, and even look ...
... a fast supercomputer, where one or several large telescope are synthesized in real time. This offers the additional benefit of an enormous flexibility as one can steer an electronic beam across the sky within microseconds, look back in time if data is buffered to see explosive events, and even look ...
NGC 6231: a young open cluster under X-rays
... • dispersion ~ 40% much more limited than previously admitted • within our sample, O-type star X-ray variability only seen for probable CWBs + only identified mechanism that produces a significant deviation from the ‘canonical’ relation 20-Dec-2006 ...
... • dispersion ~ 40% much more limited than previously admitted • within our sample, O-type star X-ray variability only seen for probable CWBs + only identified mechanism that produces a significant deviation from the ‘canonical’ relation 20-Dec-2006 ...
Chandra News March 2005 Published by the Chandra X-ray Center (CXC)
... from H-like and He-like Si and S become increasingly blueshifted on approach to the X-ray minimum, while the higher-temperature He-like Fe lines (which are unresolved in the HEG spectra) do not. The line shifts in all cases are much larger than the expected orbital velocities near periastron, and so ...
... from H-like and He-like Si and S become increasingly blueshifted on approach to the X-ray minimum, while the higher-temperature He-like Fe lines (which are unresolved in the HEG spectra) do not. The line shifts in all cases are much larger than the expected orbital velocities near periastron, and so ...