The MORGANA model for the rise of galaxies and active nuclei
... into account with simple approximated recipes. The main advantage of these models resides in the possibility of predicting the properties of whole galaxy populations in a short amount of computing time, thus making it possible to achieve a good sampling of the parameter space. However, it has been r ...
... into account with simple approximated recipes. The main advantage of these models resides in the possibility of predicting the properties of whole galaxy populations in a short amount of computing time, thus making it possible to achieve a good sampling of the parameter space. However, it has been r ...
White dwarf dynamical interactions and fast optical transients
... explosion will occur at the base of the accreted buffer that is formed after the disruption of the less massive star. Here we study the possibility that some of these fast transients arise from dynamical interactions between two white dwarfs that are triggered either by random encounters in dense st ...
... explosion will occur at the base of the accreted buffer that is formed after the disruption of the less massive star. Here we study the possibility that some of these fast transients arise from dynamical interactions between two white dwarfs that are triggered either by random encounters in dense st ...
White dwarfmain sequence binaries identified within SDSS DR7 and
... Gómez-Morán & Schwope (2007) also developed special colourcuts to select old WDMS systems from the Sloan Extension for Galactic Understanding and Exploration (SEGUE), but they did not consider the fact that the colours change with different surface gravities of white dwarfs and metallicities of co ...
... Gómez-Morán & Schwope (2007) also developed special colourcuts to select old WDMS systems from the Sloan Extension for Galactic Understanding and Exploration (SEGUE), but they did not consider the fact that the colours change with different surface gravities of white dwarfs and metallicities of co ...
U P C NIVERSITAT
... Because of their well known observational properties Type Ia, or thermonuclear, supernovae are used as standard candles, and have allowed the discovery of the accelerating expansion of the Universe. Yet, despite their importance, we still do not know exactly which stellar systems produce them. Howev ...
... Because of their well known observational properties Type Ia, or thermonuclear, supernovae are used as standard candles, and have allowed the discovery of the accelerating expansion of the Universe. Yet, despite their importance, we still do not know exactly which stellar systems produce them. Howev ...
doctoral thesis (Dissertation)
... disk first and is consequently accreted from the disk onto the star. This thesis deals with the high-energy emission from young stellar objects, which are on the one hand still actively accreting from their disk, and on the other hand are no longer deeply obscured by their natal cloud. Stars of spec ...
... disk first and is consequently accreted from the disk onto the star. This thesis deals with the high-energy emission from young stellar objects, which are on the one hand still actively accreting from their disk, and on the other hand are no longer deeply obscured by their natal cloud. Stars of spec ...
The Evolution of Protostars - Max-Planck
... only initial Spitzer results were reported and Herschel had not yet launched. For this review, we can incorporate much more complete Spitzer results and report on some initial Herschel results. We focus this review on the progress made with these facilities toward answering several key questions abo ...
... only initial Spitzer results were reported and Herschel had not yet launched. For this review, we can incorporate much more complete Spitzer results and report on some initial Herschel results. We focus this review on the progress made with these facilities toward answering several key questions abo ...
Plasmoid-induced-reconnection and fractal reconnection Kazunari Shibata and Syuniti Tanuma
... al., 1999, 2001) have revealed that if the resistivity is spatially uniform, fast, steady-state Petscheck-type reconnection does not occur but instead slow, Sweet-Parker-type reconnection occurs. This holds especially when a strong inflow is imposed at the external boundary, and the only way so far ...
... al., 1999, 2001) have revealed that if the resistivity is spatially uniform, fast, steady-state Petscheck-type reconnection does not occur but instead slow, Sweet-Parker-type reconnection occurs. This holds especially when a strong inflow is imposed at the external boundary, and the only way so far ...
ACCELERATION DUE TO GRAVITY OF A RAPIDLY ROTATING
... Normal gas pressure cant support the core left behind, supernova explosion. If the mass is more than ≈1.44M electron degeneracy pressure can’t support it. The core can’t be a white dwarf and as the density increases electrons and protons are forced together to make neutrons, which in turn form a ne ...
... Normal gas pressure cant support the core left behind, supernova explosion. If the mass is more than ≈1.44M electron degeneracy pressure can’t support it. The core can’t be a white dwarf and as the density increases electrons and protons are forced together to make neutrons, which in turn form a ne ...
SPT 0538−50: PHYSICAL CONDITIONS IN THE ISM OF A STRONGLY... GALAXY AT Z=2.8
... behavior and physics of these dust-obscured systems. Strong gravitational lensing provides an effective boost in both sensitivity and angular resolution, allowing highly detailed analyses of lensed systems that would not be possible in their unlensed counterparts. The z = 2.3 galaxy SMM J2135−0102 – ...
... behavior and physics of these dust-obscured systems. Strong gravitational lensing provides an effective boost in both sensitivity and angular resolution, allowing highly detailed analyses of lensed systems that would not be possible in their unlensed counterparts. The z = 2.3 galaxy SMM J2135−0102 – ...
Chapter 6 in the LSST Science Book
... Next, we constructed a deep empirical LMC stellar luminosity function (LF) by combining the Vband luminosity function from the Magellanic Clouds Photometric Survey (Zaritsky et al. 2004, MCPS) with the HST-based LMC LF measured by Dolphin (2002a), using Smecker-Hane et al. (2002) observations of the ...
... Next, we constructed a deep empirical LMC stellar luminosity function (LF) by combining the Vband luminosity function from the Magellanic Clouds Photometric Survey (Zaritsky et al. 2004, MCPS) with the HST-based LMC LF measured by Dolphin (2002a), using Smecker-Hane et al. (2002) observations of the ...
Star Captures by Quasar Accretion Disks: A Possible Explanation of
... disks around black holes is supplied by stars that plunge through the disk. Stars in the central part of the host galaxy are randomly perturbed to highly radial orbits, and as they repeatedly cross the disk they lose orbital energy by drag, eventually merging into the disk. Requiring the rate of ste ...
... disks around black holes is supplied by stars that plunge through the disk. Stars in the central part of the host galaxy are randomly perturbed to highly radial orbits, and as they repeatedly cross the disk they lose orbital energy by drag, eventually merging into the disk. Requiring the rate of ste ...
Progenitor systems of Type Ia Supernovae: mergers of white dwarfs
... galaxy NGC 4526. The supernova is as bright as the center of the galaxy. In the explosion itself temperatures of several billion Kelvin are reached that lead to explosive nucleosynthesis. This way, supernovae have produced virtually all heavy elements and thus shaped the Universe. As supernovae are ...
... galaxy NGC 4526. The supernova is as bright as the center of the galaxy. In the explosion itself temperatures of several billion Kelvin are reached that lead to explosive nucleosynthesis. This way, supernovae have produced virtually all heavy elements and thus shaped the Universe. As supernovae are ...
CHEMICAL ABUNDANCE DISTRIBUTIONS OF GALACTIC HALOS
... Each dark matter satellite has a stellar mass that is assigned using a cosmologically motivated analytic formalism. The infall of cold gas into each satellite is followed from the epoch of reionization to the time of its accretion onto the main halo. The gas mass is translated into a stellar mass th ...
... Each dark matter satellite has a stellar mass that is assigned using a cosmologically motivated analytic formalism. The infall of cold gas into each satellite is followed from the epoch of reionization to the time of its accretion onto the main halo. The gas mass is translated into a stellar mass th ...
SUPERNOVA REMNANT SHOCKS IN AN INHOMOGENEOUS
... (McKee and Ostriker 1977). Although fh is high in the local ISM, its value at a typical point in the galactic disk remains controversial (Cox 1987). It is quite likely that fh depends on both the nature of the galaxy and the location within it. In principle, observations of SNRs could provide the me ...
... (McKee and Ostriker 1977). Although fh is high in the local ISM, its value at a typical point in the galactic disk remains controversial (Cox 1987). It is quite likely that fh depends on both the nature of the galaxy and the location within it. In principle, observations of SNRs could provide the me ...
Applications of Photospheric Spot Temperature Models ... Stellar Angular Momentum Evolution
... most likely form. The effects of the centrifugal force from rotation, coupled with the force of gravity pulling material inward, will bring some of the material into a circumstellar disk. At this stage of stellar evolution, the star is gaining most of its energy from gravitational contraction, rathe ...
... most likely form. The effects of the centrifugal force from rotation, coupled with the force of gravity pulling material inward, will bring some of the material into a circumstellar disk. At this stage of stellar evolution, the star is gaining most of its energy from gravitational contraction, rathe ...
THE ORION NEBULA AND ITS ASSOCIATED POPULATION C. R. O
... 6548 Å doublet. The furthest layer is the ionization front proper, where hydrogen transitions from its fully ionized condition in the He+ and Heo zones to neutral. The ionization front is well delineated by both the [O I] 6300 + 6363 Å and the [S II] 6717 + 6731 Å doublets, because only that thin ...
... 6548 Å doublet. The furthest layer is the ionization front proper, where hydrogen transitions from its fully ionized condition in the He+ and Heo zones to neutral. The ionization front is well delineated by both the [O I] 6300 + 6363 Å and the [S II] 6717 + 6731 Å doublets, because only that thin ...
The APEX-CHAMP+ view of the Orion Molecular Cloud 1 core
... plus a farther region in which intermediate to high mass stars are forming. Its outside is affected by ultraviolet radiation from the neighboring Orion Nebula Cluster and forms the archetypical photon-dominated region (PDR) with the prominent bar feature. Its nearness makes the OMC-1 core region a to ...
... plus a farther region in which intermediate to high mass stars are forming. Its outside is affected by ultraviolet radiation from the neighboring Orion Nebula Cluster and forms the archetypical photon-dominated region (PDR) with the prominent bar feature. Its nearness makes the OMC-1 core region a to ...
