Sub-luminous type Ia supernovae from the mergers of equal
... ejecta as is accessible observationally. It is hard to imagine an explosion model in which hydrodynamic processes alone account for such a strong mixing of silicon and iron group elements as observed in SN 2005bl. In normal SNe Ia the core of the ejecta consists predominantly of iron group elements ...
... ejecta as is accessible observationally. It is hard to imagine an explosion model in which hydrodynamic processes alone account for such a strong mixing of silicon and iron group elements as observed in SN 2005bl. In normal SNe Ia the core of the ejecta consists predominantly of iron group elements ...
Young Stellar Objects in the Orion B Cloud
... steadily declines into the substellar mass regime. The fraction of substellar objects compared to the total number of YSOs is 28 %, which, after a correction for contamination with field stars, is more like ~ 20 %. This, as well as the overall shape of the mass function, is remarkably similar to the ...
... steadily declines into the substellar mass regime. The fraction of substellar objects compared to the total number of YSOs is 28 %, which, after a correction for contamination with field stars, is more like ~ 20 %. This, as well as the overall shape of the mass function, is remarkably similar to the ...
Growth of the inner core in the mean
... It means that thermal convection with the radioactive heating suites better to the dipole filed generation in the past than the compositional convection, or the thermal convection model with the fixed temperatures at the boundaries. We note that only taking into account of the inner core evolution a ...
... It means that thermal convection with the radioactive heating suites better to the dipole filed generation in the past than the compositional convection, or the thermal convection model with the fixed temperatures at the boundaries. We note that only taking into account of the inner core evolution a ...
S.V. Berdyugina, I.G. Usoskin, Preferred Longitudes in Sunspot
... as faculae. The above procedure transforms the two-dimensional sunspot distribution into a one-dimensional data set and, therefore, is similar to other filtering techniques. An example of the synthesized light curve is presented in Fig. 1c. Minima in the light curve correspond to spot concentrations ...
... as faculae. The above procedure transforms the two-dimensional sunspot distribution into a one-dimensional data set and, therefore, is similar to other filtering techniques. An example of the synthesized light curve is presented in Fig. 1c. Minima in the light curve correspond to spot concentrations ...
The changing face of Betelgeuse - Monthly Notices of the Royal
... One possible cause for low calibrated visibilities is a seeing mismatch between observations of the source and calibration stars. This might occur, for example, if the source were observed at a lower elevation than the calibrator. For the observations reported here, there were sometimes elevation di ...
... One possible cause for low calibrated visibilities is a seeing mismatch between observations of the source and calibration stars. This might occur, for example, if the source were observed at a lower elevation than the calibrator. For the observations reported here, there were sometimes elevation di ...
Wind-Blown Bubbles around Evolved Stars
... In this section, the evolution of a wind-blown bubble around a 40M star from the main-sequence phase, through the red supergiant phase to the final Wolf-Rayet phase is examined by means of numerical simulations. The first two stages are treated as one-dimensional (spherically symmetric) simulations ...
... In this section, the evolution of a wind-blown bubble around a 40M star from the main-sequence phase, through the red supergiant phase to the final Wolf-Rayet phase is examined by means of numerical simulations. The first two stages are treated as one-dimensional (spherically symmetric) simulations ...
The hot-Jupiter Kepler-17b: discovery, obliquity from stroboscopic
... remains intact after this stage. The value for each stellar parameter is then assigned from the median of this weighted distribution, with the error bars assigned from the nearest ±34% of values. In this way, we find M⋆ = ...
... remains intact after this stage. The value for each stellar parameter is then assigned from the median of this weighted distribution, with the error bars assigned from the nearest ±34% of values. In this way, we find M⋆ = ...
Associated Spectral and Temporal State Transition of the
... and 2 − 10 keV bands. For comparison, we have also plotted the background contribution in the source extraction region. Evidently background contribution is nearly constant and negligible throughout the observations. As can be seen in Fig. 2 (left panel), NGC 1313 X-1 showed strong X-ray variability ...
... and 2 − 10 keV bands. For comparison, we have also plotted the background contribution in the source extraction region. Evidently background contribution is nearly constant and negligible throughout the observations. As can be seen in Fig. 2 (left panel), NGC 1313 X-1 showed strong X-ray variability ...
here. - SUNY Oswego
... Full amplitude hydrodynamic models with a Saha ionization equation of state. Input parameters include, M, L, Teff, X and Z. M-L come from stellar evolutionary calculations. Given M-L is dependent on metallicity and input physics such as convective overshoot. Linear models give region of fundamental ...
... Full amplitude hydrodynamic models with a Saha ionization equation of state. Input parameters include, M, L, Teff, X and Z. M-L come from stellar evolutionary calculations. Given M-L is dependent on metallicity and input physics such as convective overshoot. Linear models give region of fundamental ...
Core Formation in Giant Gaseous Protoplanets
... E-mail addresses: [email protected] (R. Helled); [email protected] (G. Schubert) ...
... E-mail addresses: [email protected] (R. Helled); [email protected] (G. Schubert) ...
Paper II - van Werkhoven, Kenworthy and Mamajek (2014)
... then the true masses may be systematically off by tens of per cent as well (see e.g. Hillenbrand & White 2004). At this point, we are not in a position to be able to quantify the magnitude of any potential systematic error in mass due to problems with the evolutionary tracks themselves. In summary, ...
... then the true masses may be systematically off by tens of per cent as well (see e.g. Hillenbrand & White 2004). At this point, we are not in a position to be able to quantify the magnitude of any potential systematic error in mass due to problems with the evolutionary tracks themselves. In summary, ...
Characterizing the Effects of Asteroid Belt Perturbations on the
... The error at large step-sizes is due to series expansions inherent in the numerical integration algorithm being truncated at each iteration, leading to an accumulation of error by the end of the integration. For very small step-sizes, I saw round off error present in the end conditions. This error w ...
... The error at large step-sizes is due to series expansions inherent in the numerical integration algorithm being truncated at each iteration, leading to an accumulation of error by the end of the integration. For very small step-sizes, I saw round off error present in the end conditions. This error w ...
What are comets?
... 1. What is the difference between long period and short period comets? 2. Why are some comets visible and others not? 3. Why do some comets have different tails? 4. How are the two tails formed? 5. Why do scientists think that comets may have been a cause for the extinction of dinosaurs and might ha ...
... 1. What is the difference between long period and short period comets? 2. Why are some comets visible and others not? 3. Why do some comets have different tails? 4. How are the two tails formed? 5. Why do scientists think that comets may have been a cause for the extinction of dinosaurs and might ha ...
FREE Sample Here
... A) at inferior conjunction, when Mars laps the earth and passes between us and the Sun. B) at superior conjunction, when Mars lies on the far side of the Sun. C) at quadrature, when Mars lies exactly 90 degrees east or west of the Sun. D) at greatest elongation, when Mars can get up to 47 degrees fr ...
... A) at inferior conjunction, when Mars laps the earth and passes between us and the Sun. B) at superior conjunction, when Mars lies on the far side of the Sun. C) at quadrature, when Mars lies exactly 90 degrees east or west of the Sun. D) at greatest elongation, when Mars can get up to 47 degrees fr ...
Neutron Stars - Lick Observatory
... density, the atomic cores begin to overlap and matter becomes pressure ionized. At a density ~106 times terrestrial density, or of order 106 g cm!3, electrons become relativistic. At a density of about 107 g cm!3 it becomes energetically favorable to reduce the number of electrons by electron captur ...
... density, the atomic cores begin to overlap and matter becomes pressure ionized. At a density ~106 times terrestrial density, or of order 106 g cm!3, electrons become relativistic. At a density of about 107 g cm!3 it becomes energetically favorable to reduce the number of electrons by electron captur ...
Light n-Capture Element Abundances in Metal
... D. Burris, E. Jones, and J. Lusk 1989). The conditions needed are also generated in the shell-burning phase of Asymptotic Giant Branch (AGB) low to intermediate mass stars (Busso et al. 1999). These stars have lifetimes measured in billions of years. This is significant because n-capture elements c ...
... D. Burris, E. Jones, and J. Lusk 1989). The conditions needed are also generated in the shell-burning phase of Asymptotic Giant Branch (AGB) low to intermediate mass stars (Busso et al. 1999). These stars have lifetimes measured in billions of years. This is significant because n-capture elements c ...
What causes the large extensions of red supergiant
... hand, interferometric observations of RSGs also indicate the presence of extended molecular layers (CO and water), which cannot be explained by hydrostatic model atmospheres (Perrin et al. 2005; Ohnaka et al. 2011, 2013; Wittkowski et al. 2012). The RSG VX Sgr (Chiavassa et al. 2010a) showed a good ...
... hand, interferometric observations of RSGs also indicate the presence of extended molecular layers (CO and water), which cannot be explained by hydrostatic model atmospheres (Perrin et al. 2005; Ohnaka et al. 2011, 2013; Wittkowski et al. 2012). The RSG VX Sgr (Chiavassa et al. 2010a) showed a good ...
Light perturbation from stellar non radial oscillations: an application
... • Taking into account sphericity of the photosphere reveals a possible significant increase of the relative intensity perturbation at the solar limb for some modes of oscillation: - both for p and g-modes - and only for l+m even modes • The effect on the full-disk perturbation is expected to be smal ...
... • Taking into account sphericity of the photosphere reveals a possible significant increase of the relative intensity perturbation at the solar limb for some modes of oscillation: - both for p and g-modes - and only for l+m even modes • The effect on the full-disk perturbation is expected to be smal ...
galactic cosmic radiation and solar energetic particles
... as the inverse of the solar sunspot number cycle. This is discussed more fully in Section 6.2.2.1. The isotropic flux exposure to galactic cosmic radiation in space at sunspot minimum is - 4 protons cm 2 s' resulting in a yearly integrated exposure of - 1.3 x 108 protons/cm2. The isotropic flux expo ...
... as the inverse of the solar sunspot number cycle. This is discussed more fully in Section 6.2.2.1. The isotropic flux exposure to galactic cosmic radiation in space at sunspot minimum is - 4 protons cm 2 s' resulting in a yearly integrated exposure of - 1.3 x 108 protons/cm2. The isotropic flux expo ...