Epsilon Aurigae: a rare stellar eclipse - Project VS
... geometrically thin, dark, dense, but partially transparent cloud can be seen passing in front of epsilon Aurigae. The images taken over a month clearly show the black silhouette of the disc beginning to move across the surface of the primary star. The size of the disc was measured at about 2.4 billi ...
... geometrically thin, dark, dense, but partially transparent cloud can be seen passing in front of epsilon Aurigae. The images taken over a month clearly show the black silhouette of the disc beginning to move across the surface of the primary star. The size of the disc was measured at about 2.4 billi ...
The physico-chemical history of Falling Evaporating Bodies around
... influenced by their physico-chemical properties, especially the presence of volatile matter. We investigate here this question from a modeling point of view, adapting for that case the models designed for solar comets. We simulate the physico-chemical evolution of the FEB progenitors on circular orb ...
... influenced by their physico-chemical properties, especially the presence of volatile matter. We investigate here this question from a modeling point of view, adapting for that case the models designed for solar comets. We simulate the physico-chemical evolution of the FEB progenitors on circular orb ...
Criteria for Core-Collapse Supernova Explosions
... the heating efficiency is ~2\% to ~5\% and the mass in the gain region mechanism, fails in 1D. Since the mid 90s, 2D simulations that is ~0.005 M to ~0.01 M. Importantly, we find that the critical are subject to aspherical instabilities, specifically postshock luminosity for explosions in 2D is ~7 ...
... the heating efficiency is ~2\% to ~5\% and the mass in the gain region mechanism, fails in 1D. Since the mid 90s, 2D simulations that is ~0.005 M to ~0.01 M. Importantly, we find that the critical are subject to aspherical instabilities, specifically postshock luminosity for explosions in 2D is ~7 ...
P1 topic 3 - WordPress.com
... Two major theories about the origin of the Universe are the Big Bang and the Steady State theories. Some evidence supports both theories. Other evidence supports only one theory. By considering the evidence, discuss why one of these theories is preferred by most scientists. ...
... Two major theories about the origin of the Universe are the Big Bang and the Steady State theories. Some evidence supports both theories. Other evidence supports only one theory. By considering the evidence, discuss why one of these theories is preferred by most scientists. ...
Alpha Centauri
... FAMOUS FOR: It’s the 3rd brightest star in the sky. And a member of the triple star system. ...
... FAMOUS FOR: It’s the 3rd brightest star in the sky. And a member of the triple star system. ...
The Nature of SN 1961V - University of Oklahoma
... within IRAF. For this reduction the best reference files were obtained from the Multimission Archive at Space Telescope. The sources in the field are too faint for the observations to be dithered to aid in the rejection of hot/warm pixels in the STIS/CCD images/spectra; therefore, the standard reduc ...
... within IRAF. For this reduction the best reference files were obtained from the Multimission Archive at Space Telescope. The sources in the field are too faint for the observations to be dithered to aid in the rejection of hot/warm pixels in the STIS/CCD images/spectra; therefore, the standard reduc ...
Stellar Remnants White Dwarfs Type Ia Supernovae Neutron Stars
... system temporarily appears much brighter. • The explosion drives accreted matter out into space. Only the surface is affected... 19 © 2007 Pearson Education Inc., publishing as Pearson Addison-Wesley ...
... system temporarily appears much brighter. • The explosion drives accreted matter out into space. Only the surface is affected... 19 © 2007 Pearson Education Inc., publishing as Pearson Addison-Wesley ...
ATLAS lifts the Cup: discovery of a new Milky Way satellite in Crater⋆†
... population implies that star formation occurred in Crater perhaps as recently as 400 Myr ago. No globular cluster has ever accomplished the feat of prolonging its star formation by several Gyr. Therefore, if our hypothesis that the blue bright stars in Crater are blue loop giants is correct, the new ...
... population implies that star formation occurred in Crater perhaps as recently as 400 Myr ago. No globular cluster has ever accomplished the feat of prolonging its star formation by several Gyr. Therefore, if our hypothesis that the blue bright stars in Crater are blue loop giants is correct, the new ...
Excitation of Solar-like Oscillations: From PMS to MS Stellar Models
... Provided that measurements of the oscillation amplitudes and life-times (or linewidths) are available it is possible to compute the rate P at which energy is injected into the modes and hence to derive constraints on the models of stochastic excitation. The way those constraints are derived from sei ...
... Provided that measurements of the oscillation amplitudes and life-times (or linewidths) are available it is possible to compute the rate P at which energy is injected into the modes and hence to derive constraints on the models of stochastic excitation. The way those constraints are derived from sei ...
Spiral structure of the Third Galactic Quadrant and the solution to the
... Martı́nez-Delgado et al. 2005). Although the CMDs do not exhibit clear post main-sequence signatures expected for a 4-10 Gyr population (Martı́nez-Delgado et al. 2005) (red clump or red giant branch, horizontal branch, RR-Lyrae), a distinctive feature, popularised as the Blue Plume (BP; see Fig. 1) ...
... Martı́nez-Delgado et al. 2005). Although the CMDs do not exhibit clear post main-sequence signatures expected for a 4-10 Gyr population (Martı́nez-Delgado et al. 2005) (red clump or red giant branch, horizontal branch, RR-Lyrae), a distinctive feature, popularised as the Blue Plume (BP; see Fig. 1) ...
Rotational Doppler beaming in eclipsing binaries
... In all three systems the rotational velocity of both components is varied between break-up and synchronization. For the WASP-33b-like exoplanet case, the measured rotational velocity of the A-star (vrot sin i = 86.5 km s−1 ) was also simulated. The orbital phase φ is defined with respect to superior ...
... In all three systems the rotational velocity of both components is varied between break-up and synchronization. For the WASP-33b-like exoplanet case, the measured rotational velocity of the A-star (vrot sin i = 86.5 km s−1 ) was also simulated. The orbital phase φ is defined with respect to superior ...
Extrasolar Planets: An Amateur`s Search
... in locating and identifying them all. Unfortunately, amateur astronomers cannot themselves identify new extrasolar planets due to the limited instrumentation available widely to the public. It is important to note that given current limitations in even the best instrumentation, no planets smaller th ...
... in locating and identifying them all. Unfortunately, amateur astronomers cannot themselves identify new extrasolar planets due to the limited instrumentation available widely to the public. It is important to note that given current limitations in even the best instrumentation, no planets smaller th ...
The extreme physical properties of the CoRoT-7b super
... 3:2 (Zhou et al, 2005; Fogg & Nelson, 2005; Raymond et al, 2006; Mandell et al., 2007), which is clearly not observed in the HARPS radial velocity data (Queloz et al., 2009). - Scenario (1), given the small amount of mass thought to be available in the inner regions of standard protoplanetary disks, ...
... 3:2 (Zhou et al, 2005; Fogg & Nelson, 2005; Raymond et al, 2006; Mandell et al., 2007), which is clearly not observed in the HARPS radial velocity data (Queloz et al., 2009). - Scenario (1), given the small amount of mass thought to be available in the inner regions of standard protoplanetary disks, ...
Astro 6590: Galaxies and the Universe Astro
... and about 10X as much by mass of dark matter. The stars and gas are about 70% hydrogen by mass and 25% helium, the rest being heavier elements (called "metals"). • Typical scales are: masses between 106 to 1012 M (1 solar mass is 2 x 1030 kg), and sizes ~ 1-100 kpc (1 pc = 3.1 x 1016 m). Galaxies t ...
... and about 10X as much by mass of dark matter. The stars and gas are about 70% hydrogen by mass and 25% helium, the rest being heavier elements (called "metals"). • Typical scales are: masses between 106 to 1012 M (1 solar mass is 2 x 1030 kg), and sizes ~ 1-100 kpc (1 pc = 3.1 x 1016 m). Galaxies t ...
Ch 33) Astrophysics and Cosmology
... or superclusters. The farthest detectable galaxies are more than 1010 ly distant. See Table 33–1 (top of next page). 2.5 m (= 100 inches) refers to the diameter of the curved objective mirror. The bigger the mirror, the more light it collects (greater brightness) and the less diffraction there is (b ...
... or superclusters. The farthest detectable galaxies are more than 1010 ly distant. See Table 33–1 (top of next page). 2.5 m (= 100 inches) refers to the diameter of the curved objective mirror. The bigger the mirror, the more light it collects (greater brightness) and the less diffraction there is (b ...
Archaeoastronomy, Astronomy of Celts, A. Gaspani
... The existence of a find like the calendar of Coligny raises a number of very interesting questions about the actual astronomical as well as the mathematical knowledge among the Druidic class; also about the existence of speculations about the cosmogony arising from a need to find some models explai ...
... The existence of a find like the calendar of Coligny raises a number of very interesting questions about the actual astronomical as well as the mathematical knowledge among the Druidic class; also about the existence of speculations about the cosmogony arising from a need to find some models explai ...
The XMM-Newton Observatory
... releases energy, which helps support the star against its own gravity. But iron is different: it absorbs energy to fuse. Once iron starts to fuse, the energy needed to support the star is removed, sucked up by the iron fusion. Due to this and other processes, once iron fusion starts, the star is doo ...
... releases energy, which helps support the star against its own gravity. But iron is different: it absorbs energy to fuse. Once iron starts to fuse, the energy needed to support the star is removed, sucked up by the iron fusion. Due to this and other processes, once iron fusion starts, the star is doo ...
Slide 1
... • General parameters: - R ~ 10 km (104 m) - inner ~ 1018 kg m-3 = 1015g cm-3 - M ~ 0.2 - 3.2 solar masses - surface gravity ~ 1012 m s -2 • We are going to find magnetic induction, B, of a neutron star. ...
... • General parameters: - R ~ 10 km (104 m) - inner ~ 1018 kg m-3 = 1015g cm-3 - M ~ 0.2 - 3.2 solar masses - surface gravity ~ 1012 m s -2 • We are going to find magnetic induction, B, of a neutron star. ...
R136a1
RMC 136a1 (usually abbreviated to R136a1) is a Wolf-Rayet star located at the center of R136, the central condensation of stars of the large NGC 2070 open cluster in the Tarantula Nebula. It lies at a distance of about 50 kiloparsecs (163,000 light-years) in the Large Magellanic Cloud. It has the highest mass and luminosity of any known star, at 265 M☉ and 8.7 million L☉, and also one of the hottest at over 50,000 K.