Solar System: ground-based
... • Free-floating/isolated exo-planets and brown dwarfs => formation from disk or fragmenting cloud? – VLT/JWST searches in/near star-forming regions (younger objects have larger luminosities) ...
... • Free-floating/isolated exo-planets and brown dwarfs => formation from disk or fragmenting cloud? – VLT/JWST searches in/near star-forming regions (younger objects have larger luminosities) ...
Stellar dust production and composition in the Magellanic Clouds F. Kemper
... in the ISO spectroscopy, and found that, while the spectra all show amorphous silicates, some of them also show the spectral signature of Al2 O3 (alumina). The relative strength of the alumina signature to the spectrum decreases with increasing mass-loss rate, suggestive of a covering of the alumina ...
... in the ISO spectroscopy, and found that, while the spectra all show amorphous silicates, some of them also show the spectral signature of Al2 O3 (alumina). The relative strength of the alumina signature to the spectrum decreases with increasing mass-loss rate, suggestive of a covering of the alumina ...
The X-ray Bursters Problem and its Implications to the Equation of
... This energy is liberated in form of kinetic energy, gamma-ray photons (emerging in the Xray burst), and neutrinos. The time that takes for heat transport to cool the deep envelope (thermal time) is around seconds, which is much shorter than the time needed to accumulate the accreted material (hours ...
... This energy is liberated in form of kinetic energy, gamma-ray photons (emerging in the Xray burst), and neutrinos. The time that takes for heat transport to cool the deep envelope (thermal time) is around seconds, which is much shorter than the time needed to accumulate the accreted material (hours ...
Observational properties of stars
... you and the stars you are looking at. This value is different for all stars. Stars in groups or clusters usually have a similar amount of dust blocking their light, but if you are looking at individual stars scattered about the galaxy, you could be looking through either a large amount or a small am ...
... you and the stars you are looking at. This value is different for all stars. Stars in groups or clusters usually have a similar amount of dust blocking their light, but if you are looking at individual stars scattered about the galaxy, you could be looking through either a large amount or a small am ...
A very massive runaway star from Cygnus OB2⋆
... expected from the proper motion. Tracing back its path across the sky we nd that BD+43 3654 was located near the central, densest of (70 ...
... expected from the proper motion. Tracing back its path across the sky we nd that BD+43 3654 was located near the central, densest of (70 ...
Max Planck Institute for Gravitational Physics
... Bate (Exeter): - gas - SPH - turbulence - fragmentation - sink particles ...
... Bate (Exeter): - gas - SPH - turbulence - fragmentation - sink particles ...
exam 3 review lecture
... • Most interstellar gas is very cold, so it emits very few photons. • The electron in a hydrogen atom has two energy states – Spin up and spin down – Spin up has slightly more energy than spin down ...
... • Most interstellar gas is very cold, so it emits very few photons. • The electron in a hydrogen atom has two energy states – Spin up and spin down – Spin up has slightly more energy than spin down ...
The Pluto “Smackdown” and The “New” Solar System
... Differences in organic chemistry important as a function of stellar ...
... Differences in organic chemistry important as a function of stellar ...
Thoughts and New Theory`s on Stars and Planets By Barry L
... I would now like to begin my thoughts on this subject matter. The 1 point is The Original Star (crab Nebula) that exploded in 1054 ad and identified by the Chinese and Arabic Nations really went through a regeneration process due to Neutrinos. Neutrinos within the Inner core of a Planet or star have ...
... I would now like to begin my thoughts on this subject matter. The 1 point is The Original Star (crab Nebula) that exploded in 1054 ad and identified by the Chinese and Arabic Nations really went through a regeneration process due to Neutrinos. Neutrinos within the Inner core of a Planet or star have ...
A Legacy Study of Stellar Life Cycles in the Galactic Center
... VLA surveys at 6, 20, and 90 cm (Lang, Yusef-Zadeh, ...
... VLA surveys at 6, 20, and 90 cm (Lang, Yusef-Zadeh, ...
Doppler Shift - El Camino College
... 8. You overhear two students discussing the topic of Doppler shifts. Student 1: Since Betelgeuse is a red star, it must be going away from us, and since Rigel is a blue star it must be coming towards us. Student 2: I disagree, the color of the star does not tell you if it is moving. You have to look ...
... 8. You overhear two students discussing the topic of Doppler shifts. Student 1: Since Betelgeuse is a red star, it must be going away from us, and since Rigel is a blue star it must be coming towards us. Student 2: I disagree, the color of the star does not tell you if it is moving. You have to look ...
Ursa Major, the Great Bear
... M101 is a splendid face-on galaxy, which shows a distinct asymmetry in long exposure photographs. The giant spiral disk of stars, dust, and gas is 170,000 light-years across, almost twice the size of our Milky Way Galaxy. M101 is estimated to contain at least one trillion stars. M101 lies on the e ...
... M101 is a splendid face-on galaxy, which shows a distinct asymmetry in long exposure photographs. The giant spiral disk of stars, dust, and gas is 170,000 light-years across, almost twice the size of our Milky Way Galaxy. M101 is estimated to contain at least one trillion stars. M101 lies on the e ...
Core Collapse Supernovae and Neutron Star Kicks, a Primer David
... not sufficient to produce the peculiar velocities observed for pulsars. The kick mechanism must occur during the supernova that forms the neutron star. Since energies of ~1051 ergs are observed during these events, the asymmetric emission of energy (most of which comes in the form of neutrinos) duri ...
... not sufficient to produce the peculiar velocities observed for pulsars. The kick mechanism must occur during the supernova that forms the neutron star. Since energies of ~1051 ergs are observed during these events, the asymmetric emission of energy (most of which comes in the form of neutrinos) duri ...
determining stellar parameters from star`s
... spectrum is a detailed account of the atmospheric conditions at the surface of a star. Strictly speaking, the spectrum tells us only which radiations the atoms are absorbing or emitting and how intensely. With present knowledge of atomic structure, the astronomer may now predict just what influence ...
... spectrum is a detailed account of the atmospheric conditions at the surface of a star. Strictly speaking, the spectrum tells us only which radiations the atoms are absorbing or emitting and how intensely. With present knowledge of atomic structure, the astronomer may now predict just what influence ...
Supermassive black holes - University of Texas Astronomy Home
... Can detect the halo of X-rays from orbiting matter, the accretion disk, near the event horizon that will reveal the presence and nature of the black hole. ...
... Can detect the halo of X-rays from orbiting matter, the accretion disk, near the event horizon that will reveal the presence and nature of the black hole. ...
poster_IAU244 - ANU - Australian National University
... interacting system of two galaxies. The blue square in the 'bright L(Hα)' region is the combined signal from 45 galaxies. The medium and faint subsamples of galaxies (55 and 236 galaxies respectively) provide only 2σ radio continuum upper limits. These measurements at z = 0.24 are consistent with th ...
... interacting system of two galaxies. The blue square in the 'bright L(Hα)' region is the combined signal from 45 galaxies. The medium and faint subsamples of galaxies (55 and 236 galaxies respectively) provide only 2σ radio continuum upper limits. These measurements at z = 0.24 are consistent with th ...
Star formation
Star formation is the process by which dense regions within molecular clouds in interstellar space, sometimes referred to as ""stellar nurseries"" or ""star-forming regions"", collapse to form stars. As a branch of astronomy, star formation includes the study of the interstellar medium (ISM) and giant molecular clouds (GMC) as precursors to the star formation process, and the study of protostars and young stellar objects as its immediate products. It is closely related to planet formation, another branch of astronomy. Star formation theory, as well as accounting for the formation of a single star, must also account for the statistics of binary stars and the initial mass function.In June 2015, astronomers reported evidence for Population III stars in the Cosmos Redshift 7 galaxy at z = 6.60. Such stars are likely to have existed in the very early universe (i.e., at high redshift), and may have started the production of chemical elements heavier than hydrogen that are needed for the later formation of planets and life as we know it.