Probing nuclear activity versus star formation at z ∼ 0.8 using near
... as the AGN contributes to both the continuum and the emission line spectrum. Thus, estimates of the SFRs of powerful AGN, as for example quasars, will be contaminated with AGN emission to a certain extent. On the other hand, the SFRs of deeply buried and optically dull AGN obtained from Hα emission ...
... as the AGN contributes to both the continuum and the emission line spectrum. Thus, estimates of the SFRs of powerful AGN, as for example quasars, will be contaminated with AGN emission to a certain extent. On the other hand, the SFRs of deeply buried and optically dull AGN obtained from Hα emission ...
Galaxy Zoo: Are bars responsible for the feeding
... We present a new study investigating whether active galactic nuclei (AGN) beyond the local universe are preferentially fed via large-scale bars. Our investigation combines data from Chandra and Galaxy Zoo: Hubble (GZH) in the AEGIS (All-wavelength Extended Groth strip International Survey), COSMOS ( ...
... We present a new study investigating whether active galactic nuclei (AGN) beyond the local universe are preferentially fed via large-scale bars. Our investigation combines data from Chandra and Galaxy Zoo: Hubble (GZH) in the AEGIS (All-wavelength Extended Groth strip International Survey), COSMOS ( ...
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 ...
Introduction: A Road Well-Traveled
... “Scientific theory – In attempting to explain things and events, the scientist employs (1) careful observation or experiments, (2) reports of regularities, and (3) systematic explanatory schemes (theories). The statements of regularities, if accurate, may be taken as empirical laws expressing contin ...
... “Scientific theory – In attempting to explain things and events, the scientist employs (1) careful observation or experiments, (2) reports of regularities, and (3) systematic explanatory schemes (theories). The statements of regularities, if accurate, may be taken as empirical laws expressing contin ...
Production and evolution of axion dark matter in the early universe
... universe is filled by some non-baryonic energy components. Conventionally, these are categorized into two ingredients: dark matter and dark energy. Dark energy is something like the Einstein’s cosmological constant, which accelerates the expansion of the present universe. Although the accelerated ex ...
... universe is filled by some non-baryonic energy components. Conventionally, these are categorized into two ingredients: dark matter and dark energy. Dark energy is something like the Einstein’s cosmological constant, which accelerates the expansion of the present universe. Although the accelerated ex ...
Jul y 9- 11,
... Studies of the triggering of X-ray AGN in clusters have to date been hindered by small sample sizes. To address this we have undertaken a survey of 11,000 X-ray AGN in the fields of 135 of the most massive clusters known, where the high galaxy and gas densities offer a unique opportunity to examine ...
... Studies of the triggering of X-ray AGN in clusters have to date been hindered by small sample sizes. To address this we have undertaken a survey of 11,000 X-ray AGN in the fields of 135 of the most massive clusters known, where the high galaxy and gas densities offer a unique opportunity to examine ...
2. The X-ray-Radio correlation for bulgeless galaxies
... Fig. 20: The bulgeless galaxies detected in the X-ray band by the C-COSMOS survey. The continuous line represents the luminosity detection limit for the survey in respect to the redshift. The dashed line represents the limit above which galaxies are considered AGN................................... ...
... Fig. 20: The bulgeless galaxies detected in the X-ray band by the C-COSMOS survey. The continuous line represents the luminosity detection limit for the survey in respect to the redshift. The dashed line represents the limit above which galaxies are considered AGN................................... ...
Dust attenuation up to z ≃ 2 in the AKARI North Ecliptic Pole Deep
... Using multiple filters of IRC instrument, we selected more than 4000 galaxies from their rest-frame emission at 8 µm, from z ' 0.2 to ∼2. We built spectral energy distributions from the rest-frame ultraviolet (UV) to the far-IR by adding ancillary data in the opticalnear IR and from GALEX and Hersch ...
... Using multiple filters of IRC instrument, we selected more than 4000 galaxies from their rest-frame emission at 8 µm, from z ' 0.2 to ∼2. We built spectral energy distributions from the rest-frame ultraviolet (UV) to the far-IR by adding ancillary data in the opticalnear IR and from GALEX and Hersch ...
A Teacher`s Guide to the Universe
... students learn such skills as observing, inferring, and experimenting. Inquiry is central to science learning. When engaging in inquiry, students describe objects and events, ask questions, construct explanations, test those explanations against current scientific knowledge, and communicate their id ...
... students learn such skills as observing, inferring, and experimenting. Inquiry is central to science learning. When engaging in inquiry, students describe objects and events, ask questions, construct explanations, test those explanations against current scientific knowledge, and communicate their id ...
IDEA MAN
... *In 1939, Zwicky “proved” that the Universe had to be much older than Hubble’s law implied. Many clusters, he argued, were beautifully spherical. But the laws of physics said that an initially chaotic group of galaxies could only become symmetrical through a series of close encounters among three or ...
... *In 1939, Zwicky “proved” that the Universe had to be much older than Hubble’s law implied. Many clusters, he argued, were beautifully spherical. But the laws of physics said that an initially chaotic group of galaxies could only become symmetrical through a series of close encounters among three or ...
THE KINEMATICS OF ARP 295 IN Hα EMISSION
... All observations were carried out at the Observatorio Astronómico Nacional, in the Sierra San Pedro Mártir, Baja California, México. The optical spectroscopy was performed on the night of 14 August 2005, using the ‘Bolitas’ spectrograph on the 0.84-m telescope. This small Boller and Chivens spect ...
... All observations were carried out at the Observatorio Astronómico Nacional, in the Sierra San Pedro Mártir, Baja California, México. The optical spectroscopy was performed on the night of 14 August 2005, using the ‘Bolitas’ spectrograph on the 0.84-m telescope. This small Boller and Chivens spect ...
Harald Maurer – The Principle of Existence Edition
... book tries to explain why the physicists had to discover their theories and what is really behind the phenomena. Will our theory be dynamite for arguments and discussions? Certainly not at once. In the eyes of the scientists, he who opposes the valid paradigms is a crackpot, a crank, or a troll and ...
... book tries to explain why the physicists had to discover their theories and what is really behind the phenomena. Will our theory be dynamite for arguments and discussions? Certainly not at once. In the eyes of the scientists, he who opposes the valid paradigms is a crackpot, a crank, or a troll and ...
– 1 – 1. Galaxy Observations 1.1.
... the nearby Coma cluster and the Shapley Supercluster of galaxies, studying galaxies of a wide luminosity (i.e. mass) range with moderate resolution but high accuracy spectra. A fixed aperture size is used for each galaxy, corresponding to a fixed physical size for each of the two galaxy clusters. Th ...
... the nearby Coma cluster and the Shapley Supercluster of galaxies, studying galaxies of a wide luminosity (i.e. mass) range with moderate resolution but high accuracy spectra. A fixed aperture size is used for each galaxy, corresponding to a fixed physical size for each of the two galaxy clusters. Th ...
Local Group Encyclopedia of Astronomy & Astrophysics eaa.iop.org Mario L Mateo
... Diedre Hunter of Lowell Observatory. This figure is reproduced as Color Plate 9. (Right panel) An image of the central region of Sextans A obtained with the Hubble Space Telescope. In this image the individual stars in the clump located to the left of the galaxy’s center in the left-hand panel are n ...
... Diedre Hunter of Lowell Observatory. This figure is reproduced as Color Plate 9. (Right panel) An image of the central region of Sextans A obtained with the Hubble Space Telescope. In this image the individual stars in the clump located to the left of the galaxy’s center in the left-hand panel are n ...
FIELD GALAXIES AND THEIR AGNs: NATURE VERSUS
... gas to the center of the galaxy. Mergers can be major if the mass ratio of merging galaxies is > 0.33 or > 0.25 and minor if this ratio is < 0.1). If merger occurs between gas rich galaxies then it is defined as a ”wet” merger, otherwise it is a ”dry” merger. Mergers can be multiple when more than t ...
... gas to the center of the galaxy. Mergers can be major if the mass ratio of merging galaxies is > 0.33 or > 0.25 and minor if this ratio is < 0.1). If merger occurs between gas rich galaxies then it is defined as a ”wet” merger, otherwise it is a ”dry” merger. Mergers can be multiple when more than t ...
PHY 104 Introduction to Astronomy - Missouri Western State University
... they got to be the way they are. Among the topics we will discuss are galaxies, quasars, stars, and black holes. For each of these objects, we will talk about what they are, how they are observed, how they form, and how they fit into the overall scheme of things in the universe. Due to the constrain ...
... they got to be the way they are. Among the topics we will discuss are galaxies, quasars, stars, and black holes. For each of these objects, we will talk about what they are, how they are observed, how they form, and how they fit into the overall scheme of things in the universe. Due to the constrain ...
2 Justification and benefits in joining TMT
... Astronomy has been at the forefront of scientific revolution, starting with the Copernicus's view of the Solar system. With increasingly large telescopes covering virtually all the wavelengths ranging from the radio to the gamma-ray, modern astronomy reveals a rich and beautiful Universe, revealing ...
... Astronomy has been at the forefront of scientific revolution, starting with the Copernicus's view of the Solar system. With increasingly large telescopes covering virtually all the wavelengths ranging from the radio to the gamma-ray, modern astronomy reveals a rich and beautiful Universe, revealing ...
Galaxies
... These are galaxies with lanes of stars and nebula emanating from a central nucleus Spiral galaxies range from Tightly wound arms and Large central bulge Loosely wound arms and Small central bulge Direct relationship between the tightness of the arms and size of the central bulge Allows classificatio ...
... These are galaxies with lanes of stars and nebula emanating from a central nucleus Spiral galaxies range from Tightly wound arms and Large central bulge Loosely wound arms and Small central bulge Direct relationship between the tightness of the arms and size of the central bulge Allows classificatio ...
Clifford M. Will Theory and Experiment in Gravitational Physics 1993
... 1959-60, in fields ranging from experimental physics to abstract theory to astronomy, signaled a new era for general relativity. This era was to be one in which general relativity not only would become an important theoretical tool of the astrophysicist, but would have its validity challenged as nev ...
... 1959-60, in fields ranging from experimental physics to abstract theory to astronomy, signaled a new era for general relativity. This era was to be one in which general relativity not only would become an important theoretical tool of the astrophysicist, but would have its validity challenged as nev ...
Non-standard cosmology
A non-standard cosmology is any physical cosmological model of the universe that has been, or still is, proposed as an alternative to the Big Bang model of standard physical cosmology. In the history of cosmology, various scientists and researchers have disputed parts or all of the Big Bang due to a rejection or addition of fundamental assumptions needed to develop a theoretical model of the universe. From the 1940s to the 1960s, the astrophysical community was equally divided between supporters of the Big Bang theory and supporters of a rival steady state universe. It was not until advances in observational cosmology in the late 1960s that the Big Bang would eventually become the dominant theory, and today there are few active researchers who dispute it.The term non-standard is applied to any cosmological theory that does not conform to the scientific consensus, but is not used in describing alternative models where no consensus has been reached, and is also used to describe theories that accept a ""big bang"" occurred but differ as to the detailed physics of the origin and evolution of the universe. Because the term depends on the prevailing consensus, the meaning of the term changes over time. For example, hot dark matter would not have been considered non-standard in 1990, but would be in 2010. Conversely, a non-zero cosmological constant resulting in an accelerating universe would have been considered non-standard in 1990, but is part of the standard cosmology in 2010.