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 ...
The Evolution of Star Formation Activity in . Cory R. Wagner
... 24 µm data for isolated high-redshift galaxies. We calculate rest-frame ultraviolet star formation rates for low-redshift cluster members using Hubble Space Telescope observations. Using publically available mid-infrared and ultraviolet data for our field sample, we empirically derive scaling relati ...
... 24 µm data for isolated high-redshift galaxies. We calculate rest-frame ultraviolet star formation rates for low-redshift cluster members using Hubble Space Telescope observations. Using publically available mid-infrared and ultraviolet data for our field sample, we empirically derive scaling relati ...
Mapping the Pathways of Galaxy Transformation Across Time and
... Bulges play a pivotal role in how a galaxy might evolve. However, the exact mechanisms involved in shaping their hosts and even their demographic evolution with cosmic time still remain an unanswered piece in the galaxy formation puzzle. In this talk I will present an innovative study into the stell ...
... Bulges play a pivotal role in how a galaxy might evolve. However, the exact mechanisms involved in shaping their hosts and even their demographic evolution with cosmic time still remain an unanswered piece in the galaxy formation puzzle. In this talk I will present an innovative study into the stell ...
Galaxies
... underlying dark matter. We have started to understand how baryonic gas within the dark matter halos cools and collapses to form stars, and how the energy from star formation can feed back into the surrounding gas and regulate subsequent star formation. However, at a fundamental level we still lack a ...
... underlying dark matter. We have started to understand how baryonic gas within the dark matter halos cools and collapses to form stars, and how the energy from star formation can feed back into the surrounding gas and regulate subsequent star formation. However, at a fundamental level we still lack a ...
Local Group Encyclopedia of Astronomy & Astrophysics eaa.iop.org Mario L Mateo
... our own. These nearby systems also provide our clearest views of how galaxies interact with one another in the relatively small volume of space of the Local Group. The brightest members of the Local Group are so close to us that on a clear, dark night away from city lights it is possible to see them ...
... our own. These nearby systems also provide our clearest views of how galaxies interact with one another in the relatively small volume of space of the Local Group. The brightest members of the Local Group are so close to us that on a clear, dark night away from city lights it is possible to see them ...
X. Nuclear star clusters in low-mass early-type galaxies
... computations, the theoretical framework for the dissipational formation of NSCs provides less quantitative predictions than the inspiralling cluster scenario. There is evidence that both the in situ as well as the GC inspiralling formation happen in galaxies. Evidence for the GC inspiral scenario is ...
... computations, the theoretical framework for the dissipational formation of NSCs provides less quantitative predictions than the inspiralling cluster scenario. There is evidence that both the in situ as well as the GC inspiralling formation happen in galaxies. Evidence for the GC inspiral scenario is ...
the stebbins galaxy: the origins of interstellar medium studies
... But in fact, interstellar matter and the reddening and extinction of starlight it causes are, as we will see, very significant. Why did Shapley conclude that extinction is negligible? His argument considered only three globular clusters: M3 and M13 are high in galactic latitude, +79° and +41° respec ...
... But in fact, interstellar matter and the reddening and extinction of starlight it causes are, as we will see, very significant. Why did Shapley conclude that extinction is negligible? His argument considered only three globular clusters: M3 and M13 are high in galactic latitude, +79° and +41° respec ...
A new view of galaxy evolution
... internal motion similar to nearby disc/ellipticals – further evidence for their violent origin. There are other clues we must consider. One is that these galaxies are undergoing intense star formation with on the order of a few hundred solar masses of new stars formed per year, compared with just a ...
... internal motion similar to nearby disc/ellipticals – further evidence for their violent origin. There are other clues we must consider. One is that these galaxies are undergoing intense star formation with on the order of a few hundred solar masses of new stars formed per year, compared with just a ...
Chapter 24
... ent histories of formation and stellar content. The dwarfs are by far the most common type of ellipticals, outnumbering their brighter counterparts by about 10 to 1. However, most of the mass that exists in the form of elliptical galaxies is contained in the larger systems. The absence of spiral arm ...
... ent histories of formation and stellar content. The dwarfs are by far the most common type of ellipticals, outnumbering their brighter counterparts by about 10 to 1. However, most of the mass that exists in the form of elliptical galaxies is contained in the larger systems. The absence of spiral arm ...
How Our Place in The Cosmos is Designed for
... They argue that although Earth’s complex life and the rare conditions that allow for it are highly improbable, perhaps even unique, these conditions are still nothing more than an unintended fluke. In a lecture after the publication ...
... They argue that although Earth’s complex life and the rare conditions that allow for it are highly improbable, perhaps even unique, these conditions are still nothing more than an unintended fluke. In a lecture after the publication ...
Downloaded - Royal Society Open Science
... The term also includes brown dwarfs, for which many physical relations presented here also apply. ‘Planetary systems’ is defined as systems which include SBs. The ‘disambiguation’ equations identified in figure 1 refer to relations that have appeared in multiple different forms in the previous post- ...
... The term also includes brown dwarfs, for which many physical relations presented here also apply. ‘Planetary systems’ is defined as systems which include SBs. The ‘disambiguation’ equations identified in figure 1 refer to relations that have appeared in multiple different forms in the previous post- ...
Hydrodynamic simulations of pulsar glitch recovery
... to be locked together for r < R1 and postulate that the fluid immediately adjacent to this region is also strongly coupled, i.e. c1 = c2 = 0 at r = R1 . ...
... to be locked together for r < R1 and postulate that the fluid immediately adjacent to this region is also strongly coupled, i.e. c1 = c2 = 0 at r = R1 . ...
Super-Earth and Sub-Neptune Exoplanets: a First Look from the
... et al. 1989; Wolszczan & Frail 1992; Mayor & Queloz 1995). Results from the NASA Kepler satellite indicate that main-sequence stars on average host, at a minimum, about one planet per star (Fressin et al. 2013; Dressing & Charbonneau 2013). For the first time in human history, we have incontrovertib ...
... et al. 1989; Wolszczan & Frail 1992; Mayor & Queloz 1995). Results from the NASA Kepler satellite indicate that main-sequence stars on average host, at a minimum, about one planet per star (Fressin et al. 2013; Dressing & Charbonneau 2013). For the first time in human history, we have incontrovertib ...
Stars, Galaxies, Superuniverses and the Urantia Book, by Frederick
... the universe itself. Figure 1 shows a portion of the Deep Field South image showing galaxies at distances out to 12 billion light years. The Urantia Book contains a description of the universe which one might describe as "Urantian cosmology." This cosmological information, written prior to 1941 by c ...
... the universe itself. Figure 1 shows a portion of the Deep Field South image showing galaxies at distances out to 12 billion light years. The Urantia Book contains a description of the universe which one might describe as "Urantian cosmology." This cosmological information, written prior to 1941 by c ...
A Comet-Hunter`s Legacy -
... by each other, they undergo episodes of star formation caused by their gravitational interaction. M81's bright spiral arms are the site of star formation, partially caused by density waves raised by the most recent passage of M82, and the central portion of M82 is undergoing a starburst -- an explos ...
... by each other, they undergo episodes of star formation caused by their gravitational interaction. M81's bright spiral arms are the site of star formation, partially caused by density waves raised by the most recent passage of M82, and the central portion of M82 is undergoing a starburst -- an explos ...
Galaxies - WordPress.com
... as our galaxy ages over the next few billion years it will A not change at all B get smaller and become an elliptical galaxy C get fainter till it fades from view ...
... as our galaxy ages over the next few billion years it will A not change at all B get smaller and become an elliptical galaxy C get fainter till it fades from view ...
Chapter 10 Formation and evolution of the Local Group
... Peebles, Tully and Shaya (2011) have produced a dynamical model of 28 galaxies (including the Galaxy) currently within 1.5 Mpc. The model does not show the assumed previous interaction between M 31 and M 33 (as suggested by the stellar and gaseous properties of the two galaxies and discussed shortly ...
... Peebles, Tully and Shaya (2011) have produced a dynamical model of 28 galaxies (including the Galaxy) currently within 1.5 Mpc. The model does not show the assumed previous interaction between M 31 and M 33 (as suggested by the stellar and gaseous properties of the two galaxies and discussed shortly ...
Introduction to Cosmology - Experimental Elementary Particle
... defined as the time it takes the Earth to go once around the Sun. One year is approximately equal to 3.2 × 107 s. In cosmological context, a year is frequently an inconveniently short period of time, so cosmologists frequently use gigayears (Gyr), equal to 109 yr, or 3.2 × 1016 s. For example, the a ...
... defined as the time it takes the Earth to go once around the Sun. One year is approximately equal to 3.2 × 107 s. In cosmological context, a year is frequently an inconveniently short period of time, so cosmologists frequently use gigayears (Gyr), equal to 109 yr, or 3.2 × 1016 s. For example, the a ...
Article PDF - IOPscience
... As a significant fraction of galaxies at high redshifts show morphological and physical evidence for undergoing higher than average star formation as compared to galaxies in the nearby universe, we examine the morphological properties of five nearby starburst galaxies that are generally regarded as th ...
... As a significant fraction of galaxies at high redshifts show morphological and physical evidence for undergoing higher than average star formation as compared to galaxies in the nearby universe, we examine the morphological properties of five nearby starburst galaxies that are generally regarded as th ...
Galaxy Sorting
... are probably so many dwarf galaxies that their combined mass probably exceeds that of all the larger galaxies taken together. But their small size and dimness make them hard to detect and we have only been able to discover them when they are relatively nearby. Hubble based his classification sche ...
... are probably so many dwarf galaxies that their combined mass probably exceeds that of all the larger galaxies taken together. But their small size and dimness make them hard to detect and we have only been able to discover them when they are relatively nearby. Hubble based his classification sche ...
The Most Luminous Protostars in Molecular Clouds: A Hint to
... vast majority of the data points lying between the two limits. Although the lower limit could be partially due to the detection limit of the IRAS survey, it should delineate a true limit, since the IRAS detection limit is lower than line B for most clouds. It is also interesting to note that, at lea ...
... vast majority of the data points lying between the two limits. Although the lower limit could be partially due to the detection limit of the IRAS survey, it should delineate a true limit, since the IRAS detection limit is lower than line B for most clouds. It is also interesting to note that, at lea ...
A Zoo of Galaxies - Cambridge University Press
... The variety of different galaxies observed in the sky naturally caused people to wonder what they were. The scientific arguments surrounding this question at the start of the 20th century, are best represented perhaps, by the public debate held in 1920 between Heber Curtis and Harlow Shapley. Many oth ...
... The variety of different galaxies observed in the sky naturally caused people to wonder what they were. The scientific arguments surrounding this question at the start of the 20th century, are best represented perhaps, by the public debate held in 1920 between Heber Curtis and Harlow Shapley. Many oth ...
A Zoo of Galaxies - Portsmouth Research Portal
... The variety of different galaxies observed in the sky naturally caused people to wonder what they were. The scientific arguments surrounding this question at the start of the 20th century, are best represented perhaps, by the public debate held in 1920 between Heber Curtis and Harlow Shapley. Many o ...
... The variety of different galaxies observed in the sky naturally caused people to wonder what they were. The scientific arguments surrounding this question at the start of the 20th century, are best represented perhaps, by the public debate held in 1920 between Heber Curtis and Harlow Shapley. Many o ...
A Zoo of Galaxies
... The variety of different galaxies observed in the sky naturally caused people to wonder what they were. The scientific arguments surrounding this question at the start of the 20th century, are best represented perhaps, by the public debate held in 1920 between Heber Curtis and Harlow Shapley. Many o ...
... The variety of different galaxies observed in the sky naturally caused people to wonder what they were. The scientific arguments surrounding this question at the start of the 20th century, are best represented perhaps, by the public debate held in 1920 between Heber Curtis and Harlow Shapley. Many o ...
Time Variation of Kepler Transits Induced By Stellar Rotating Spots
... wide obliquity range, while cool stars tend to have low obliquities, mostly consistent with well aligned orbits. This was confirmed by a study of a larger sample by Albrecht et al. (2012) and is consistent with the results of Schlaufman (2010) and Hansen (2012) who used different approaches. Those a ...
... wide obliquity range, while cool stars tend to have low obliquities, mostly consistent with well aligned orbits. This was confirmed by a study of a larger sample by Albrecht et al. (2012) and is consistent with the results of Schlaufman (2010) and Hansen (2012) who used different approaches. Those a ...