Estudio de Cúmulos de Galaxias en el Sloan Digital Sky Survey
... – Building Galaxy Merger Trees. ...
... – Building Galaxy Merger Trees. ...
The Fundamental Plane, Stellar Popula6ons
... Some of the (many) things we don’t know (at least not well)… What is the relaBon between stellar mass and dynamical mass, and how does this vary with parent halo mass & environment? How do the observed trends in stellar populaBons vary with ...
... Some of the (many) things we don’t know (at least not well)… What is the relaBon between stellar mass and dynamical mass, and how does this vary with parent halo mass & environment? How do the observed trends in stellar populaBons vary with ...
The Milky Way Galaxy
... Center of Milky Way Galaxy Apparently, there is an enormous black hole at the center of the galaxy, which is the source of these phenomena An accretion disk surrounding the black hole emits enormous amounts of radiation Observations on three stars that are orbiting the core region at a distance ran ...
... Center of Milky Way Galaxy Apparently, there is an enormous black hole at the center of the galaxy, which is the source of these phenomena An accretion disk surrounding the black hole emits enormous amounts of radiation Observations on three stars that are orbiting the core region at a distance ran ...
Here
... pixels. It is possible to do photometry (the image recorded is then a portion of the sky/star/galaxy) or spectroscopy (the light is dispersed by using a grating into its colors). There are some common problems with CCDs, which need to be taken into account in every observational program: -read-out n ...
... pixels. It is possible to do photometry (the image recorded is then a portion of the sky/star/galaxy) or spectroscopy (the light is dispersed by using a grating into its colors). There are some common problems with CCDs, which need to be taken into account in every observational program: -read-out n ...
26.4 Groups of Stars
... The Milky Way’s flattened disk shape is caused by its rotation. The sun takes about 220 million years to complete one orbit around the galaxy’s center. Recent evidence suggests that there is a massive black hole at our galaxy’s center. Stars are forming in the galaxy's spiral arms. ...
... The Milky Way’s flattened disk shape is caused by its rotation. The sun takes about 220 million years to complete one orbit around the galaxy’s center. Recent evidence suggests that there is a massive black hole at our galaxy’s center. Stars are forming in the galaxy's spiral arms. ...
First Light for May, 2001 - South Bay Astronomical Society
... The transit method can only find systems that are aligned with our line of sight. The Stellar Wobble Method can find planetary systems that are not fully aligned with our line of sight but still have a component that provides a relative motion towards or away from Earth. Thus, the Wobble method pro ...
... The transit method can only find systems that are aligned with our line of sight. The Stellar Wobble Method can find planetary systems that are not fully aligned with our line of sight but still have a component that provides a relative motion towards or away from Earth. Thus, the Wobble method pro ...
Active Galactic Nuclei: are they important?
... •Massive central black holes are in all galaxies •In most galaxies the activity is low (e.g. Sgr A* in the Milky Way) but there is no strict border between AGN and non-active galaxies •Thus again BH and galaxies likely evolve ...
... •Massive central black holes are in all galaxies •In most galaxies the activity is low (e.g. Sgr A* in the Milky Way) but there is no strict border between AGN and non-active galaxies •Thus again BH and galaxies likely evolve ...
telescope as time machine - Galaxy Evolution Explorer
... gather galactic light that has been journeying toward us for nearly the entire history of the universe. ...
... gather galactic light that has been journeying toward us for nearly the entire history of the universe. ...
PDF format
... d) It depends on the standard candle: if they are Cepheid variables, they will still pulsate at the same rate no matter what distance they are from you. © 2014 Pearson Education, Inc. ...
... d) It depends on the standard candle: if they are Cepheid variables, they will still pulsate at the same rate no matter what distance they are from you. © 2014 Pearson Education, Inc. ...
Document
... • Interstellar gas clouds emit intense microwaves at specific frequencies. • Doppler shift gives speed • True speed plus proper motion gives distance • Maybe 10s of Mpc but new technique ...
... • Interstellar gas clouds emit intense microwaves at specific frequencies. • Doppler shift gives speed • True speed plus proper motion gives distance • Maybe 10s of Mpc but new technique ...
Blowin` in the wind: both `negative` and `positive` feedback in an
... We have recently completed two follow-up programs on obscured quasars pre-selected for being in a significant outflowing phase. The first consists in X-Shooter observations of a sample of X-ray selected obscured QSOs at z ∼ 1.5, selected from the XMM-COSMOS survey on the basis of their observed red col ...
... We have recently completed two follow-up programs on obscured quasars pre-selected for being in a significant outflowing phase. The first consists in X-Shooter observations of a sample of X-ray selected obscured QSOs at z ∼ 1.5, selected from the XMM-COSMOS survey on the basis of their observed red col ...
First Stars, Quasars and Reionization Observations
... – Pop II: [Fe/H] poor stars, spiral galaxy halos and elliptical galaxies ...
... – Pop II: [Fe/H] poor stars, spiral galaxy halos and elliptical galaxies ...
printer-friendly sample test questions
... Interpreting the organization of the above graphic suggests that Aristotle believed each of the following EXCEPT A. all stars are the located the same distance from Earth. B. the Sun is a big star closer to Earth than the other stars. C. stars are found a little beyond the orbit of the last planet. ...
... Interpreting the organization of the above graphic suggests that Aristotle believed each of the following EXCEPT A. all stars are the located the same distance from Earth. B. the Sun is a big star closer to Earth than the other stars. C. stars are found a little beyond the orbit of the last planet. ...
Messier 87
Messier 87 (also known as Virgo A or NGC 4486, and generally abbreviated to M87) is a supergiant elliptical galaxy in the constellation Virgo. One of the most massive galaxies in the local universe, it is notable for its large population of globular clusters—M87 contains about 12,000 compared to the 150-200 orbiting the Milky Way—and its jet of energetic plasma that originates at the core and extends outward at least 1,500 parsecs (4,900 light-years), travelling at relativistic speed. It is one of the brightest radio sources in the sky, and is a popular target for both amateur astronomy observations and professional astronomy study.French astronomer Charles Messier discovered M87 in 1781, cataloguing it as a nebulous feature while searching for objects that would confuse comet hunters. The second brightest galaxy within the northern Virgo Cluster, M87 is located about 16.4 million parsecs (53.5 million light-years) from Earth. Unlike a disk-shaped spiral galaxy, M87 has no distinctive dust lanes. Instead, it has an almost featureless, ellipsoidal shape typical of most giant elliptical galaxies, diminishing in luminosity with distance from the centre. Forming around one sixth of M87's mass, the stars in this galaxy have a nearly spherically symmetric distribution, their density decreasing with increasing distance from the core. At the core is a supermassive black hole, which forms the primary component of an active galactic nucleus. This object is a strong source of multiwavelength radiation, particularly radio waves. M87's galactic envelope extends out to a radius of about 150 kiloparsecs (490,000 light-years), where it has been truncated—possibly by an encounter with another galaxy. Between the stars is a diffuse interstellar medium of gas that has been chemically enriched by elements emitted from evolved stars.