The star formation history of galaxies in 3D: CALIFA perspective
... (Blanton & Moustakas 2009), following well the Hubble tuning-fork diagram. The bulge fraction seems to be one of the main physical parameters that produce the Hubble sequence, increasing from late to early spirals. In this scheme, S0 galaxies are a transition class between the spiral classes and the ...
... (Blanton & Moustakas 2009), following well the Hubble tuning-fork diagram. The bulge fraction seems to be one of the main physical parameters that produce the Hubble sequence, increasing from late to early spirals. In this scheme, S0 galaxies are a transition class between the spiral classes and the ...
Application Exercise: Distances to Stars Using Measured Parallax
... four basic methods of determining distances: radar, parallax, standard candles, and the Hubble Law. Each of these methods is most useful at certain distances, with radar being useful nearby (e.g., the Moon), the Hubble Law being useful at the farthest distance (e.g., galaxies far, far away). In this ...
... four basic methods of determining distances: radar, parallax, standard candles, and the Hubble Law. Each of these methods is most useful at certain distances, with radar being useful nearby (e.g., the Moon), the Hubble Law being useful at the farthest distance (e.g., galaxies far, far away). In this ...
Introducing the black hole
... is believed that in this process, the core of a star, possibly a late giant, collapses from its original radius of a few thousand kilometers to a compact object with a radius of a few tens of kilometers. The core has slowly evolved over thousands of years to a degree where it is unstable against gra ...
... is believed that in this process, the core of a star, possibly a late giant, collapses from its original radius of a few thousand kilometers to a compact object with a radius of a few tens of kilometers. The core has slowly evolved over thousands of years to a degree where it is unstable against gra ...
The dark heart of the Milky Way
... detected signs that there really are black holes out there in space. But, as yet, not everyone is convinced. The very smallest black holes of all could perforate space and, invisible as they are, might pose a real danger to us on Earth. More massive black holes may form when certain dense stars of m ...
... detected signs that there really are black holes out there in space. But, as yet, not everyone is convinced. The very smallest black holes of all could perforate space and, invisible as they are, might pose a real danger to us on Earth. More massive black holes may form when certain dense stars of m ...
25.4 Galaxies and the Universe
... the spectrum, occurs because the light waves are stretched, which shows that the receiver and the source are moving away from each other. ...
... the spectrum, occurs because the light waves are stretched, which shows that the receiver and the source are moving away from each other. ...
The Vampire Stars - d_smith.lhseducators.com
... • Stars that eventually become Type II supernovae begin with 3 to >100 times the mass of the sun. • A nebula collapses to become a protostar; nuclear fusion ignites becomes a main sequence star (where it lives most of its life); begins to use up its fuel. ...
... • Stars that eventually become Type II supernovae begin with 3 to >100 times the mass of the sun. • A nebula collapses to become a protostar; nuclear fusion ignites becomes a main sequence star (where it lives most of its life); begins to use up its fuel. ...
Basic Debris Disk Model - Institute of Astronomy
... P-R drag is insignificant… Distribution of dust due to loss in collisions and migration by P-R drag depends on η0 = tpr/tcol ∝ D0.5 ...
... P-R drag is insignificant… Distribution of dust due to loss in collisions and migration by P-R drag depends on η0 = tpr/tcol ∝ D0.5 ...
Black Hole Accretion
... accretion rates (0.001 -- 1 LEdd) and NS radii (1.6 -- 4 Schw. radii, i.e., 6.5 -- 16 km), for three choices of the core temperature ...
... accretion rates (0.001 -- 1 LEdd) and NS radii (1.6 -- 4 Schw. radii, i.e., 6.5 -- 16 km), for three choices of the core temperature ...
Visual Measurements of the Multiple Star
... “neglected” double star. Neglected double stars are had been in 1824. It was thought that this 15-inch systems that have been rarely studied or have not instrument might reveal double stars that had esbeen restudied for quite a while. For investigators caped detection by the Dorpat refractor due to ...
... “neglected” double star. Neglected double stars are had been in 1824. It was thought that this 15-inch systems that have been rarely studied or have not instrument might reveal double stars that had esbeen restudied for quite a while. For investigators caped detection by the Dorpat refractor due to ...
takes its time doing so. The coolest white dwarfs
... layers leaving a core of mostly ionized carbon and oxygen. The average mass of a white dwarf is .6 solar masses, but they have been known to have a radius of about 1 earth radius. These stars are very dense. At this point, fusion is no longer occurring in the white dwarf’s core, so there is no radia ...
... layers leaving a core of mostly ionized carbon and oxygen. The average mass of a white dwarf is .6 solar masses, but they have been known to have a radius of about 1 earth radius. These stars are very dense. At this point, fusion is no longer occurring in the white dwarf’s core, so there is no radia ...
The Story of Planet Building
... ___/6 pts.- All significant steps in the formation of the solar system are included. ___/6 pts.- All scientific processes are explained ___/6 pts. Significant steps have an illustration (each page must have a picture) ____/15 Use the following terms correctly throughout your book. Underline each ter ...
... ___/6 pts.- All significant steps in the formation of the solar system are included. ___/6 pts.- All scientific processes are explained ___/6 pts. Significant steps have an illustration (each page must have a picture) ____/15 Use the following terms correctly throughout your book. Underline each ter ...
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.