Document
... between yearly epochs at the 5 level with the CFHT Legacy Survey optical catalog. • Rule out sources with optical hosts with the colors and morphology of a star or quasar. • Follow up galaxy hosts that do not have an hard X-ray detection with optical spectroscopy to look for signs of an AGN. • Trig ...
... between yearly epochs at the 5 level with the CFHT Legacy Survey optical catalog. • Rule out sources with optical hosts with the colors and morphology of a star or quasar. • Follow up galaxy hosts that do not have an hard X-ray detection with optical spectroscopy to look for signs of an AGN. • Trig ...
SUMSS - 京都大学
... Correlation between bulge mass and black hole mass (Kormendy & Richstone 1995) Black hole mass-bulge mass correlation implies that formation of ...
... Correlation between bulge mass and black hole mass (Kormendy & Richstone 1995) Black hole mass-bulge mass correlation implies that formation of ...
Pre-Lab
... category including gaseous nebulae, planetary nebulae, hazy star clusters, and faint lens-shaped formations. If these objects were nearby, with distances comparable to those of observable stars, they would have to be luminous clouds of gas within our Galaxy. If they were very remote, far beyond the ...
... category including gaseous nebulae, planetary nebulae, hazy star clusters, and faint lens-shaped formations. If these objects were nearby, with distances comparable to those of observable stars, they would have to be luminous clouds of gas within our Galaxy. If they were very remote, far beyond the ...
The kinematics of Galaxies in Compact Groups
... most have peculiar rotation curves + dynamical properties of the galaxies do not correlate with any galaxy/group parameter. 2) Rubin et al. (1991) studied 32 galaxies – found that 2/3 have peculiar rotation curves. They found a large offset of the TF relation with respect to the field relation in th ...
... most have peculiar rotation curves + dynamical properties of the galaxies do not correlate with any galaxy/group parameter. 2) Rubin et al. (1991) studied 32 galaxies – found that 2/3 have peculiar rotation curves. They found a large offset of the TF relation with respect to the field relation in th ...
Cosmology with GMRT
... Since dark matter is typically dominant even in the central regions, the dark matter density distribution in dwarfs should reflect that predicted by numerical simulations Details of ‘baryon physics’, e.g. the mass to light ratio of the stellar population, feedback from baryonic cooling and c ...
... Since dark matter is typically dominant even in the central regions, the dark matter density distribution in dwarfs should reflect that predicted by numerical simulations Details of ‘baryon physics’, e.g. the mass to light ratio of the stellar population, feedback from baryonic cooling and c ...
CMB-Wed-Crittenden
... halos cluster differently than the less massive ones, but this is generally expected. ...
... halos cluster differently than the less massive ones, but this is generally expected. ...
Large Scale Structure of the Universe Lab
... a view of the structure of the Universe in three-dimensions. You might speculate that an image of this structure could be determined by photographing stars to see if they form some kind of pattern. An example of a star is our own Sun. Although the Sun is extremely bright for earth’s inhabitants, it ...
... a view of the structure of the Universe in three-dimensions. You might speculate that an image of this structure could be determined by photographing stars to see if they form some kind of pattern. An example of a star is our own Sun. Although the Sun is extremely bright for earth’s inhabitants, it ...
Lecture-25 Notes - Georgia Southern University Astrophysics
... that is, objects that sort-of look like stars but are most definitely not stars - they are distant galaxies whose nuclei are emitting much more light than the rest of the host galaxy. Here are some examples. Compare their nuclei with the image of a star (to the same scale) at far upper-left. QSOs ar ...
... that is, objects that sort-of look like stars but are most definitely not stars - they are distant galaxies whose nuclei are emitting much more light than the rest of the host galaxy. Here are some examples. Compare their nuclei with the image of a star (to the same scale) at far upper-left. QSOs ar ...
Galaxies
... observe because they are located behind the center of the Milky Way, which obscures our view. ...
... observe because they are located behind the center of the Milky Way, which obscures our view. ...
HST Key Project to Measure the Hubble Constant from
... – EGs found to occupy a “fundamental plane” in which a defined effective radius is tightly correlated with the surface brightness with that radius and central velocity dispersion – Scatter ~10-20% distance for individual cluster ...
... – EGs found to occupy a “fundamental plane” in which a defined effective radius is tightly correlated with the surface brightness with that radius and central velocity dispersion – Scatter ~10-20% distance for individual cluster ...
Interacting Galaxies
... conflicting pull of matter from all directions. These forces can result in shockwaves rippling through the interstellar clouds. Gas and dust can then be siphoned into the active central regions, either fueling bursts of star formation that appear as characteristic blue knots of young stars, or feedi ...
... conflicting pull of matter from all directions. These forces can result in shockwaves rippling through the interstellar clouds. Gas and dust can then be siphoned into the active central regions, either fueling bursts of star formation that appear as characteristic blue knots of young stars, or feedi ...
Galaxies
... away from our Milky way, with a recession velocity, vr, proportional to their distance d: ...
... away from our Milky way, with a recession velocity, vr, proportional to their distance d: ...
No Slide Title
... All galaxies Red Shifted All galaxies moving away from us! Universe is expanding! This expansion is from the expansion of space-time. ...
... All galaxies Red Shifted All galaxies moving away from us! Universe is expanding! This expansion is from the expansion of space-time. ...
... of hot intergalactic gas within cluster • Near clusters appear to have their members fairly smoothly spread out, while far away clusters (and hence younger clusters) are more ragged looking – this suggests that clusters form by galaxies attracting each other into groups as opposed to clustering form ...
Nuclear Stellar Populations in Bright Spiral Galaxies
... sample (the ISO Atlas of Bright Spiral Galaxies). ~80% of the sample have spectra that are essentially identical and that exhibit only absorption features characteristic of the atmospheres of late-type stars. We present a composite near-infrared spectrum that characterizes these "quiescent" galaxies ...
... sample (the ISO Atlas of Bright Spiral Galaxies). ~80% of the sample have spectra that are essentially identical and that exhibit only absorption features characteristic of the atmospheres of late-type stars. We present a composite near-infrared spectrum that characterizes these "quiescent" galaxies ...
Astronomy Chapter 17 – Galaxies A. Main Ideas 1. Discovering
... region in their core. • Radio Galaxies ⇒ Radio galaxies emit large amounts of energy in the radio part of the EM spectrum. They are usually elliptical galaxies, and their radio emission differs in two important ways from that of ordinary galaxies. The energy is emitted from the core of the galaxy an ...
... region in their core. • Radio Galaxies ⇒ Radio galaxies emit large amounts of energy in the radio part of the EM spectrum. They are usually elliptical galaxies, and their radio emission differs in two important ways from that of ordinary galaxies. The energy is emitted from the core of the galaxy an ...
Accreting Supermassive Black Holes and their
... The sky in black holes, > 10^7 solar mass. Aitoff projection in galactic coordinates of 5,978 candidate sources in the case of a complete sub sample (the Galactic plane remains obscured). The choice was made from a complete sample of 10,284 candidate brighter than 0.03 Jy at 2 micron, and selected ...
... The sky in black holes, > 10^7 solar mass. Aitoff projection in galactic coordinates of 5,978 candidate sources in the case of a complete sub sample (the Galactic plane remains obscured). The choice was made from a complete sample of 10,284 candidate brighter than 0.03 Jy at 2 micron, and selected ...
Starbursts – from 30 Doradus to Lyman
... bution from the ultraviolet to the far-infrared. However, for the youngest embedded starbursts even infrared radiation is strongly absorbed by dust and we must turn to the millimetre and radio domains. Rapid progress is already being made on both ends of the spectrum, as illustrated by the most rece ...
... bution from the ultraviolet to the far-infrared. However, for the youngest embedded starbursts even infrared radiation is strongly absorbed by dust and we must turn to the millimetre and radio domains. Rapid progress is already being made on both ends of the spectrum, as illustrated by the most rece ...
PDF - Amazing Space, STScI
... Astronomers used Hubble to conduct a census of Jupiter-sized extrasolar planets residing in the bulge of our Milky Way galaxy. Looking at a narrow slice of sky, the telescope nabbed 16 potential alien worlds orbiting a variety of stars. Astronomers have estimated that about 5 percent of stars in the ...
... Astronomers used Hubble to conduct a census of Jupiter-sized extrasolar planets residing in the bulge of our Milky Way galaxy. Looking at a narrow slice of sky, the telescope nabbed 16 potential alien worlds orbiting a variety of stars. Astronomers have estimated that about 5 percent of stars in the ...
Hubble Space Telescope`s
... Astronomers used Hubble to conduct a census of Jupiter-sized extrasolar planets residing in the bulge of our Milky Way galaxy. Looking at a narrow slice of sky, the telescope nabbed 16 potential alien worlds orbiting a variety of stars. Astronomers have estimated that about 5 percent of stars in the ...
... Astronomers used Hubble to conduct a census of Jupiter-sized extrasolar planets residing in the bulge of our Milky Way galaxy. Looking at a narrow slice of sky, the telescope nabbed 16 potential alien worlds orbiting a variety of stars. Astronomers have estimated that about 5 percent of stars in the ...
Chapter 3 Cosmology 3.1 The Doppler effect
... AQA Physics Dark energy Astronomers in 1998 studying type Ia supernovae were astounded when they discovered very distant supernovae much further away than expected. To reach such distances, the supernovae must have been accelerating. The astronomers concluded that the expansion of the Universe is ac ...
... AQA Physics Dark energy Astronomers in 1998 studying type Ia supernovae were astounded when they discovered very distant supernovae much further away than expected. To reach such distances, the supernovae must have been accelerating. The astronomers concluded that the expansion of the Universe is ac ...
Study of the X-ray Source Population and the Dark Matter
... Group will enable us to constrain the mass of dark matter in these galaxies and test different models of the formation and growth of galaxies out of primordial dark-matter halos. The stellar mass of Draco dSph is 3 x 105 MSun. We have detected four X-ray binary candidates and 16 additional hard sour ...
... Group will enable us to constrain the mass of dark matter in these galaxies and test different models of the formation and growth of galaxies out of primordial dark-matter halos. The stellar mass of Draco dSph is 3 x 105 MSun. We have detected four X-ray binary candidates and 16 additional hard sour ...
File
... dust, and little formation of new stars. Elliptical galaxies range greatly in size, from ten million solar masses to one hundred times the mass of the Milky Way. ...
... dust, and little formation of new stars. Elliptical galaxies range greatly in size, from ten million solar masses to one hundred times the mass of the Milky Way. ...
Quasar
Quasars (/ˈkweɪzɑr/) or quasi-stellar radio sources are the most energetic and distant members of a class of objects called active galactic nuclei (AGN). Quasars are extremely luminous and were first identified as being high redshift sources of electromagnetic energy, including radio waves and visible light, that appeared to be similar to stars, rather than extended sources similar to galaxies. Their spectra contain very broad emission lines, unlike any known from stars, hence the name ""quasi-stellar."" Their luminosity can be 100 times greater than that of the Milky Way. Most quasars were formed approximately 12 billion years ago caused by collisions of galaxies and their central black holes merging to form either a supermassive black hole or a Binary black hole system.Although the true nature of these objects was controversial until the early 1980s, there is now a scientific consensus that a quasar is a compact region in the center of a massive galaxy surrounding a central supermassive black hole. Its size is 10–10,000 times the Schwarzschild radius of the black hole. The energy emitted by a quasar derives from mass falling onto the accretion disc around the black hole.