Abstracts - New Frontiers in Black Hole Astrophysics
... Andreja Gomboc, University of Nova Gorica (chair) Carole Mundell, University of Bath (co-chair) Diana Worrall, University of Bristol Elina Lindfors, University of Turku Paula Chadwick, Durham University Stephan Rosswog, Stockholm University Kenji Toma, Tohoku University ...
... Andreja Gomboc, University of Nova Gorica (chair) Carole Mundell, University of Bath (co-chair) Diana Worrall, University of Bristol Elina Lindfors, University of Turku Paula Chadwick, Durham University Stephan Rosswog, Stockholm University Kenji Toma, Tohoku University ...
X-ray telescopes
... increased collecting area and angular resolution and thus greatly improved signal-tonoise ratio. Originally proposing a paraboloid they extended their idea to include the true imaging devices of the Wolter type. This was the first time that grazing incidence optics were suggested as a method of cons ...
... increased collecting area and angular resolution and thus greatly improved signal-tonoise ratio. Originally proposing a paraboloid they extended their idea to include the true imaging devices of the Wolter type. This was the first time that grazing incidence optics were suggested as a method of cons ...
The discovery based on GLIMPSE data of a protostar driving a
... Yorke 2007; Evans 2011). For low-mass star formation, a widely accepted scenario has been proposed by Shu et al. (1987), in which four distinct evolutionary stages were defined. On the basis of the star formation scenario proposed by Shu et al. (1987), Lada (1987) developed a widely used classificat ...
... Yorke 2007; Evans 2011). For low-mass star formation, a widely accepted scenario has been proposed by Shu et al. (1987), in which four distinct evolutionary stages were defined. On the basis of the star formation scenario proposed by Shu et al. (1987), Lada (1987) developed a widely used classificat ...
Ch17_Galaxies
... • A group of galaxy clusters may gravitationally attract each other into a larger structure called a supercluster – a cluster of clusters – A supercluster contains a half dozen to several dozen galaxy clusters spread over tens to hundreds of millions of light-years (The Local group belongs to the Lo ...
... • A group of galaxy clusters may gravitationally attract each other into a larger structure called a supercluster – a cluster of clusters – A supercluster contains a half dozen to several dozen galaxy clusters spread over tens to hundreds of millions of light-years (The Local group belongs to the Lo ...
Ch16_MilkyWayGalaxy
... per cubic light-year, are arranged in an elongated structure about 1000 light-years across • Some energetic event, perhaps a supernova explosion, violently disturbed the center in the not-to-distant past • Deep within the core lies an incredibly small (10 AU diameter) radio source known as Sgr A* • ...
... per cubic light-year, are arranged in an elongated structure about 1000 light-years across • Some energetic event, perhaps a supernova explosion, violently disturbed the center in the not-to-distant past • Deep within the core lies an incredibly small (10 AU diameter) radio source known as Sgr A* • ...
Galaxies and Their Structure
... from the spectra of over 40 spiral galaxies (at his time people thought the ``spiral nebulae'' were inside the Milky Way). He found that over 90% of the spectra showed redshifts which meant that they were moving away from us. Edwin Hubble and Milton Humason found distances to the spiral nebulae. Whe ...
... from the spectra of over 40 spiral galaxies (at his time people thought the ``spiral nebulae'' were inside the Milky Way). He found that over 90% of the spectra showed redshifts which meant that they were moving away from us. Edwin Hubble and Milton Humason found distances to the spiral nebulae. Whe ...
Chapter 16
... • A group of galaxy clusters may gravitationally attract each other into a larger structure called a supercluster – a cluster of clusters – A supercluster contains a half dozen to several dozen galaxy clusters spread over tens to hundreds of millions of light-years (The Local group belongs to the Lo ...
... • A group of galaxy clusters may gravitationally attract each other into a larger structure called a supercluster – a cluster of clusters – A supercluster contains a half dozen to several dozen galaxy clusters spread over tens to hundreds of millions of light-years (The Local group belongs to the Lo ...
PowerPoint Presentation - 21. Galaxy Evolution
... • So many galaxies which look “normal” today have supermassive black holes at their centers that have just stopped accreting • such as Andromeda and Milky Way © 2004 Pearson Education Inc., publishing as Addison-Wesley ...
... • So many galaxies which look “normal” today have supermassive black holes at their centers that have just stopped accreting • such as Andromeda and Milky Way © 2004 Pearson Education Inc., publishing as Addison-Wesley ...
A hypervelocity star from the Large Magellanic Cloud
... performed per initial selection of a are weighted with equal crosssection. If the distribution of orbital separations in a star cluster is flat in log a, like in the case of young star clusters (Kouwenhoven et al. 2005), we can superpose the results of these experiments in order to acquire a total v ...
... performed per initial selection of a are weighted with equal crosssection. If the distribution of orbital separations in a star cluster is flat in log a, like in the case of young star clusters (Kouwenhoven et al. 2005), we can superpose the results of these experiments in order to acquire a total v ...
PowerPoint
... On the 11th day of November in the evening after sunset ... I noticed that a new and unusual star, surpassing the other stars in brilliancy, was shining ... and since I had, from boyhood, known all the stars of the heavens perfectly, it was quite evident to me that there had never been any star in t ...
... On the 11th day of November in the evening after sunset ... I noticed that a new and unusual star, surpassing the other stars in brilliancy, was shining ... and since I had, from boyhood, known all the stars of the heavens perfectly, it was quite evident to me that there had never been any star in t ...
Galaxy Classification - VCI
... Spiral Galaxies Like our own Milky Way, all spiral galaxies have a nuclear bulge, and at least 2 spiral or propeller-shaped arms, with a halo of gas, dust, stars, and globular clusters. Spiral galaxies are classified as Sa, Sb, or Sc depending on the size of the nucleus & how tightly the arms are ...
... Spiral Galaxies Like our own Milky Way, all spiral galaxies have a nuclear bulge, and at least 2 spiral or propeller-shaped arms, with a halo of gas, dust, stars, and globular clusters. Spiral galaxies are classified as Sa, Sb, or Sc depending on the size of the nucleus & how tightly the arms are ...
ppt
... • Gunn-Peterson absorption trough is found – reionization time scales can be deduced. • Combine with other studies, this discovery is also a strong evidence for the important role of supermassive black hole (106 – 109 solar) in galaxy evolution. ...
... • Gunn-Peterson absorption trough is found – reionization time scales can be deduced. • Combine with other studies, this discovery is also a strong evidence for the important role of supermassive black hole (106 – 109 solar) in galaxy evolution. ...
candels
... CANDELS CANDELS: Correlations of SEDs and Morphologies with Star-formation Status for Massive Galaxies at z ~ 2 What turns galaxies off? The morphologies of intermediate-mass and massive quiescent galaxies during the last ten billion years using the CANDELS Survey Smooth(er) Stellar Mass Maps in CAN ...
... CANDELS CANDELS: Correlations of SEDs and Morphologies with Star-formation Status for Massive Galaxies at z ~ 2 What turns galaxies off? The morphologies of intermediate-mass and massive quiescent galaxies during the last ten billion years using the CANDELS Survey Smooth(er) Stellar Mass Maps in CAN ...
Cooling neutron stars: Theory and observations
... Ordinary cooling isolates neutron stars of age 1 kyr—1 Myr • There is one basic phenomenological cooling concept (but many physical realizations) • Main cooling regulator: neutrino luminosity function • Warmest observed stars are low-massive; their neutrino luminosity seems to be <= 1/30 of modified ...
... Ordinary cooling isolates neutron stars of age 1 kyr—1 Myr • There is one basic phenomenological cooling concept (but many physical realizations) • Main cooling regulator: neutrino luminosity function • Warmest observed stars are low-massive; their neutrino luminosity seems to be <= 1/30 of modified ...
Investigating Black Hole Kicks
... X-ray binaries are divided into two main class, as according to the mass of the noncompact star: low-mass X-ray binaries (LMXBs) and high mass X-ray binaries (HMXBs) ([29]). In both cases, the accreting star can be either a neutron star or a black hole. F HMXB: the donor is a young and massive O/B s ...
... X-ray binaries are divided into two main class, as according to the mass of the noncompact star: low-mass X-ray binaries (LMXBs) and high mass X-ray binaries (HMXBs) ([29]). In both cases, the accreting star can be either a neutron star or a black hole. F HMXB: the donor is a young and massive O/B s ...
Origin and Evolution of Neutron Star Magnetic Fields - if
... Neutron stars with young, high-mass companions (“high-mass X-ray binaries” or HMXBs) tend to appear as X-ray pulsars, in which the accreted material is presumably channelled by the magnetic field onto the polar caps. In some cases, cyclotron features have been found in the X-ray spectrum, correspondi ...
... Neutron stars with young, high-mass companions (“high-mass X-ray binaries” or HMXBs) tend to appear as X-ray pulsars, in which the accreted material is presumably channelled by the magnetic field onto the polar caps. In some cases, cyclotron features have been found in the X-ray spectrum, correspondi ...
High molecular gas fractions in normal massive star
... Stars form from cold molecular interstellar gas. As this is relatively rare in the local Universe, galaxies like the Milky Way form only a few new stars per year. Typical massive galaxies in the distant Universe formed stars an order of magnitude more rapidly1,2. Unless star formation was significan ...
... Stars form from cold molecular interstellar gas. As this is relatively rare in the local Universe, galaxies like the Milky Way form only a few new stars per year. Typical massive galaxies in the distant Universe formed stars an order of magnitude more rapidly1,2. Unless star formation was significan ...
Resultados del Concurso 2008A para Observaciones en
... details and outcomes of these interactions are currently unclear. Recent discoveries of brown dwarfs and planets orbiting post-red giant branch “hot subdwarf” stars implies that the substellar objects are not only sufficient for ejecting the outer layers of a red giant’s atmosphere, but that they ca ...
... details and outcomes of these interactions are currently unclear. Recent discoveries of brown dwarfs and planets orbiting post-red giant branch “hot subdwarf” stars implies that the substellar objects are not only sufficient for ejecting the outer layers of a red giant’s atmosphere, but that they ca ...
A Deeper Look at Faint H $\ alpha $ Emission in Nearby Dwarf
... with the Maryland-Magellan Tunable Filter (MMTF) on the Magellan 6.5m telescope. An effective bandpass of ∼13Å is used, and the images reach 3σ flux limits of ∼8×10−18 ergs s−1 cm−2 , which is about an order of magnitude lower than standard narrowband observations obtained by the most recent generat ...
... with the Maryland-Magellan Tunable Filter (MMTF) on the Magellan 6.5m telescope. An effective bandpass of ∼13Å is used, and the images reach 3σ flux limits of ∼8×10−18 ergs s−1 cm−2 , which is about an order of magnitude lower than standard narrowband observations obtained by the most recent generat ...
T. Thompson, Jan 2007
... • Starbursts: what is the role of the secondary electron/positrons? • Backgrounds: neutrino (MeV to >TeV), -ray, FIR, & radio. • What is the energy density of cosmic rays in starburst galaxies? ...
... • Starbursts: what is the role of the secondary electron/positrons? • Backgrounds: neutrino (MeV to >TeV), -ray, FIR, & radio. • What is the energy density of cosmic rays in starburst galaxies? ...
What powers luminous infrared galaxies?
... The line ratio in most sources including the two ULIRGs is reasonably well fit by effective temperatures near 42,000 K. The Galactic center (here we used ne 3000 and log(U)=-1) lies at the cool end of the distribution, a fact that is very likely explained by the ageing effects of its most recent s ...
... The line ratio in most sources including the two ULIRGs is reasonably well fit by effective temperatures near 42,000 K. The Galactic center (here we used ne 3000 and log(U)=-1) lies at the cool end of the distribution, a fact that is very likely explained by the ageing effects of its most recent s ...
25.4 Galaxies and the Universe
... • The view currently favored by most scientists is an expanding universe with no ending point. ...
... • The view currently favored by most scientists is an expanding universe with no ending point. ...
Measurements of Neutron Star Masses
... eventually squeezed out at densities near n0 (32). If so, beginning at about 0.1 n0, there matter (35) has yielded novel states of matter, Motivation 1. Nuclear equation of state. could be a continuous change of the dimenincluding color-superconducting phases with sionality of matter from three-dime ...
... eventually squeezed out at densities near n0 (32). If so, beginning at about 0.1 n0, there matter (35) has yielded novel states of matter, Motivation 1. Nuclear equation of state. could be a continuous change of the dimenincluding color-superconducting phases with sionality of matter from three-dime ...
110 - Institute for Astronomy
... showing a quasi-regular series of dust lanes projecting from the arms of M51 (Scoville & Rector 2001). We investigate, using time-dependent numerical MHD simulations, how such spurs could form (and subsequently fragment) from the interaction of a gaseous interstellar medium with a stellar spiral arm ...
... showing a quasi-regular series of dust lanes projecting from the arms of M51 (Scoville & Rector 2001). We investigate, using time-dependent numerical MHD simulations, how such spurs could form (and subsequently fragment) from the interaction of a gaseous interstellar medium with a stellar spiral arm ...
Manuscript - Kapteyn Astronomical Institute
... The red asterisks in the left panel of Fig. 1 show ηgal as function of halo mass. As indicated by the median trend (red solid line), halos become increasingly inefficient in collecting baryons onto galaxies as they become less massive: for Mvir < 1010 h−1 M⊙ , ηgal ∼ 1 − 10%. This is the result of a ...
... The red asterisks in the left panel of Fig. 1 show ηgal as function of halo mass. As indicated by the median trend (red solid line), halos become increasingly inefficient in collecting baryons onto galaxies as they become less massive: for Mvir < 1010 h−1 M⊙ , ηgal ∼ 1 − 10%. This is the result of a ...
Astrophysical X-ray source
Astrophysical X-ray sources are astronomical objects with physical properties which result in the emission of X-rays.There are a number of types of astrophysical objects which emit X-rays, from galaxy clusters, through black holes in active galactic nuclei (AGN) to galactic objects such as supernova remnants, stars, and binary stars containing a white dwarf (cataclysmic variable stars and super soft X-ray sources), neutron star or black hole (X-ray binaries). Some solar system bodies emit X-rays, the most notable being the Moon, although most of the X-ray brightness of the Moon arises from reflected solar X-rays. A combination of many unresolved X-ray sources is thought to produce the observed X-ray background. The X-ray continuum can arise from bremsstrahlung, either magnetic or ordinary Coulomb, black-body radiation, synchrotron radiation, inverse Compton scattering of lower-energy photons be relativistic electrons, knock-on collisions of fast protons with atomic electrons, and atomic recombination, with or without additional electron transitions.Furthermore, celestial entities in space are discussed as celestial X-ray sources. The origin of all observed astronomical X-ray sources is in, near to, or associated with a coronal cloud or gas at coronal cloud temperatures for however long or brief a period.