NIR interferometry of the Seyfert galaxy NGC 1068
... ● The properties of the circumnuclear dust distribution (e.g., torus, outflow cavities, etc.) derived from observations and modelling can be related to the luminosity and morphology of circumnuclear star forming regions. This will provide constraints for a scenario which connects the time evolution ...
... ● The properties of the circumnuclear dust distribution (e.g., torus, outflow cavities, etc.) derived from observations and modelling can be related to the luminosity and morphology of circumnuclear star forming regions. This will provide constraints for a scenario which connects the time evolution ...
Betelgeuse – Challenging our Understanding for more than 2000
... • Rapid photometric changes are not global • Observed events: large, rapid decrease in RV followed by 0.5 mag decrease in brightness – tend to occur just aher pulsaVon RV minimum – speculate that ma ...
... • Rapid photometric changes are not global • Observed events: large, rapid decrease in RV followed by 0.5 mag decrease in brightness – tend to occur just aher pulsaVon RV minimum – speculate that ma ...
Detecting Stars at the Galactic Centre via Synchrotron Emission
... (see next paragraph) it is not clear that any additional synchrotron emission will be observable. Arguably, it is best to resolve the synchrotron emission from any star orbiting Sgr A*, such as S2. At apoapse S2 is ∼ 0.23′′ from Sgr A* while at periapse it is only ∼ 0.015′′ away. Thus, to detect a s ...
... (see next paragraph) it is not clear that any additional synchrotron emission will be observable. Arguably, it is best to resolve the synchrotron emission from any star orbiting Sgr A*, such as S2. At apoapse S2 is ∼ 0.23′′ from Sgr A* while at periapse it is only ∼ 0.015′′ away. Thus, to detect a s ...
HR4796A_telesco - University of Florida Astronomy
... size and composition. W2000 ignore the effects of radiation pressure, assuming, in effect, that large, dynamically stable dust grains, with 0, orbit HR4796A; is the ratio of the radiation pressure force to the gravitational force on a particle (called , the overpressure ratio, by Backman & Pa ...
... size and composition. W2000 ignore the effects of radiation pressure, assuming, in effect, that large, dynamically stable dust grains, with 0, orbit HR4796A; is the ratio of the radiation pressure force to the gravitational force on a particle (called , the overpressure ratio, by Backman & Pa ...
Bondi Accretion onto a Luminous Object
... As noticed in the case for Hoyle–Lyttleton accretion onto an accretion disk (Fukue, Ioroi 1999), an anisotropic radiation field of accretion disks drastically changes the accretion nature. This is also true for the present Bondi accretion. One typical example is the existence of a cone of avoidance; ...
... As noticed in the case for Hoyle–Lyttleton accretion onto an accretion disk (Fukue, Ioroi 1999), an anisotropic radiation field of accretion disks drastically changes the accretion nature. This is also true for the present Bondi accretion. One typical example is the existence of a cone of avoidance; ...
An evolutionary channel towards the accreting millisecond pulsar
... the accretion disc should experience a thermal and viscous instability. During this stage, the accreting neutron star would be observed as a transient X-ray source, which appears as short-lived outbursts separated by long-term quiescence. The neutron star was assumed to accrete at a rate of ṀNS = m ...
... the accretion disc should experience a thermal and viscous instability. During this stage, the accreting neutron star would be observed as a transient X-ray source, which appears as short-lived outbursts separated by long-term quiescence. The neutron star was assumed to accrete at a rate of ṀNS = m ...
Rapid neutral–neutral reactions at low temperatures
... ogous but unstudied neutral reactions, which might appear similar to systems with E a = 0, can be governed by short-range potential barriers. For example, both neutral C and O atoms lie in the same ground electronic state: 3 P. Yet, while C is quite reactive, experimental studies show that O is rela ...
... ogous but unstudied neutral reactions, which might appear similar to systems with E a = 0, can be governed by short-range potential barriers. For example, both neutral C and O atoms lie in the same ground electronic state: 3 P. Yet, while C is quite reactive, experimental studies show that O is rela ...
View/Open - NuSpace Home - National University of Science and
... theories can be ruled out unless sufficient observations are available to act up as the arbiter thus pressure is put on the need for more refined observations. Should these observations became available, there is hope that only the correct theory will stand the test as the fine tuning of these theor ...
... theories can be ruled out unless sufficient observations are available to act up as the arbiter thus pressure is put on the need for more refined observations. Should these observations became available, there is hope that only the correct theory will stand the test as the fine tuning of these theor ...
the mass-loss return from evolved stars to the large
... Galaxy survive their residence in the ISM and are incorporated into planet-forming disks around young stars, as must have happened for our solar system (Gail et al. 2009; Nittler 2009). It is desirable to determine the relative contributions to the mass budget from different sources of dust in a gal ...
... Galaxy survive their residence in the ISM and are incorporated into planet-forming disks around young stars, as must have happened for our solar system (Gail et al. 2009; Nittler 2009). It is desirable to determine the relative contributions to the mass budget from different sources of dust in a gal ...
A break in the gas and dust surface density of the disc around the T
... Here, we present the results of a combined study using spatially resolved molecular-line observations and SED modelling of the disc around the low-mass pre-main-sequence star IM Lup. Most pre-main-sequence stars with discs studied so far in detail are located in the nearby star-forming region of Tau ...
... Here, we present the results of a combined study using spatially resolved molecular-line observations and SED modelling of the disc around the low-mass pre-main-sequence star IM Lup. Most pre-main-sequence stars with discs studied so far in detail are located in the nearby star-forming region of Tau ...
Fig. 2.
... region in the blue, green, UV, and dual-wavelength LEDs are investigated with the APSYS simulation program. 2. Simulation results show that, with appropriate designs, the optical performance may be effectively improved due to the increase of hole injection efficiency, enhancement of electron confine ...
... region in the blue, green, UV, and dual-wavelength LEDs are investigated with the APSYS simulation program. 2. Simulation results show that, with appropriate designs, the optical performance may be effectively improved due to the increase of hole injection efficiency, enhancement of electron confine ...
2. Bright AGN phase
... accreting at around or slightly less than the Eddington rate. The gas becomes transparent and the nucleus can be seen. 3. Death of bright AGNs radiation of AGNs expels gases to quench both accretion and star formation. 4. Faint AGN phases accreting at very low rates 0.01M / M Edd . ...
... accreting at around or slightly less than the Eddington rate. The gas becomes transparent and the nucleus can be seen. 3. Death of bright AGNs radiation of AGNs expels gases to quench both accretion and star formation. 4. Faint AGN phases accreting at very low rates 0.01M / M Edd . ...
Asteroseismic Modelling of Solar-like Stars
... the light emitted from the stellar surfaces, opaqueness of which prevents us from directly seeing their interiors. Nevertheless, the desire to do so has motivated the efforts to discover scientific methods to use the observations in a way to help us predict what the physical picture inside a star is ...
... the light emitted from the stellar surfaces, opaqueness of which prevents us from directly seeing their interiors. Nevertheless, the desire to do so has motivated the efforts to discover scientific methods to use the observations in a way to help us predict what the physical picture inside a star is ...
My talk on CO at z=0 from Santiago in June, 2011
... One point: One part of one galaxy Overlaid points show rings in three face-on spiral galaxies. ...
... One point: One part of one galaxy Overlaid points show rings in three face-on spiral galaxies. ...
Literature Review on the Formation of Active Regions
... magnetic field with the electron angular moment (Mestel, 1999). This discovery was used by Hale (1908) to measure the magnitude of the solar magnetic field. Since then, the magnetic nature of sunspots unfolded. The Zeeman effect states that, if an ionized gas is placed in the magnetic field, most of ...
... magnetic field with the electron angular moment (Mestel, 1999). This discovery was used by Hale (1908) to measure the magnitude of the solar magnetic field. Since then, the magnetic nature of sunspots unfolded. The Zeeman effect states that, if an ionized gas is placed in the magnetic field, most of ...
![The P Cygni supergiant [OMN2000] LS1](http://s1.studyres.com/store/data/014882705_1-5f78b60dc5267f0c5ad35fc8d810ae0e-300x300.png)
The P Cygni supergiant [OMN2000] LS1
... combined with a higher effective temperature, minimises the effect of this degeneracy. H/He ratios of 0.5 to 1.5 are permitted by our modeling; if H/He were higher then the He i 2.112 and 2.185µm lines and He i (7-4) complex would be weaker than observed. Following the scaling determined by Hillier ...
... combined with a higher effective temperature, minimises the effect of this degeneracy. H/He ratios of 0.5 to 1.5 are permitted by our modeling; if H/He were higher then the He i 2.112 and 2.185µm lines and He i (7-4) complex would be weaker than observed. Following the scaling determined by Hillier ...
GALAXY FORMATION AND CLUSTER FORMATION Richard B
... mostly within the first few Gyr. They must therefore have been more compact than typical present-day irregular or spiral galaxies, since a higher star formation rate requires a higher mean density (Larson 1977). Typical irregular or spiral galaxies also do not make clusters as massive as typical glo ...
... mostly within the first few Gyr. They must therefore have been more compact than typical present-day irregular or spiral galaxies, since a higher star formation rate requires a higher mean density (Larson 1977). Typical irregular or spiral galaxies also do not make clusters as massive as typical glo ...
The local density of matter mapped by Hipparcos
... of matter in the local Galactic disc because of two significant improvements. First, the kinematics and vertical density distribution of stars used to trace the disc potential can be determined with much higher accuracy, permitting a better determination of the total amount of gravitating matter in ...
... of matter in the local Galactic disc because of two significant improvements. First, the kinematics and vertical density distribution of stars used to trace the disc potential can be determined with much higher accuracy, permitting a better determination of the total amount of gravitating matter in ...
A Study of Herbig Ae Be Star HD 163296: Variability in
... material, causing them to have a lower density. Now, the parcels continues to rise up due to its newfound buoyancy. This causes other parcels of plasma to now be more dense than the surrounding area, and these sink down towards the core. This adiabatic cycle is known as convection, and keeps the int ...
... material, causing them to have a lower density. Now, the parcels continues to rise up due to its newfound buoyancy. This causes other parcels of plasma to now be more dense than the surrounding area, and these sink down towards the core. This adiabatic cycle is known as convection, and keeps the int ...
xrayecc
... The Evolution of Eccentricity of X-ray Binaries In some binary systems, mass transfer occurs between the two components. This transfer leads to variations in the orbital parameters, including the eccentricity, orbital period and separation. In some binary systems, the accreting component is degenera ...
... The Evolution of Eccentricity of X-ray Binaries In some binary systems, mass transfer occurs between the two components. This transfer leads to variations in the orbital parameters, including the eccentricity, orbital period and separation. In some binary systems, the accreting component is degenera ...
Molecular cloud regulated star formation in galaxies
... However, simulations show that the energy contained in supersonic motions is quickly dissipated even in the presence of magnetic fields (see references in Mac Low & Klessen 2004). To sustain the turbulence therefore requires an energy source, for example, from star formation, yet some clouds have tu ...
... However, simulations show that the energy contained in supersonic motions is quickly dissipated even in the presence of magnetic fields (see references in Mac Low & Klessen 2004). To sustain the turbulence therefore requires an energy source, for example, from star formation, yet some clouds have tu ...
Circumstellar molecular composition of the oxygen
... Circumstellar molecules have been extensively observed both in the form of surveys of a single molecular species and in the form of searches for various molecular species in a limited number of carefully selected sources. The aim of these studies was to derive (i) the mass-loss rate (from CO rotatio ...
... Circumstellar molecules have been extensively observed both in the form of surveys of a single molecular species and in the form of searches for various molecular species in a limited number of carefully selected sources. The aim of these studies was to derive (i) the mass-loss rate (from CO rotatio ...