FIRST LIGHT IN THE UNIVERSE
... • AGN feedback may be able to reproduce this behavior in CDM models, but further work is needed to understand environmental dependence of this process: are downsizing trends occurring at a different rate in clusters vs `field’? • Massive galaxies are now being found at z>2 in surprising numbers; ma ...
... • AGN feedback may be able to reproduce this behavior in CDM models, but further work is needed to understand environmental dependence of this process: are downsizing trends occurring at a different rate in clusters vs `field’? • Massive galaxies are now being found at z>2 in surprising numbers; ma ...
Here - Cornell Astronomy
... To date, ALFALFA has surveyed about 4000 square degrees of sky, conducting a census of gas-rich objects in the universe out to a distance of 250 Mpc (815 million light years). When complete, the ALFALFA catalog of extragalactic atomic hydrogen sources will contain more than 25000 objects. Among its ...
... To date, ALFALFA has surveyed about 4000 square degrees of sky, conducting a census of gas-rich objects in the universe out to a distance of 250 Mpc (815 million light years). When complete, the ALFALFA catalog of extragalactic atomic hydrogen sources will contain more than 25000 objects. Among its ...
Galactic Thin Disk - Caltech Astronomy
... where h is called the scale length. The surface brightness L(R) is expressed here in L pc−2 , but in practice is measured in magnitudes per arcsec2 and indicated by µ. For the majority of the bright spiral galaxies, Freeman in 1970 found that the central surface brightness was remarkably constant a ...
... where h is called the scale length. The surface brightness L(R) is expressed here in L pc−2 , but in practice is measured in magnitudes per arcsec2 and indicated by µ. For the majority of the bright spiral galaxies, Freeman in 1970 found that the central surface brightness was remarkably constant a ...
Chapter 15 ppt
... The Life Cycle of Sunlike Stars, continued • After a sunlike star forms, it enters the main sequence stage, the longest stage of its life cycle. The main sequence is the location on the H-R diagram where most stars lie. • During the main sequence stage, energy is generated in the core of the star fr ...
... The Life Cycle of Sunlike Stars, continued • After a sunlike star forms, it enters the main sequence stage, the longest stage of its life cycle. The main sequence is the location on the H-R diagram where most stars lie. • During the main sequence stage, energy is generated in the core of the star fr ...
Proper Motion of the Andromeda Galaxy
... All masers seen in the Galaxy occur in other galaxies. But, moving from kpc to Mpc distances, Resolution down 1000-fold Sensitivity down 106-fold 1 pc → 1 kpc 1 Jy → 1 µJy Only a few species (water best) Only a few 10’s of galaxies ...
... All masers seen in the Galaxy occur in other galaxies. But, moving from kpc to Mpc distances, Resolution down 1000-fold Sensitivity down 106-fold 1 pc → 1 kpc 1 Jy → 1 µJy Only a few species (water best) Only a few 10’s of galaxies ...
Ch24
... Built in 1845 by the Third Earl of Rosse In terms of size, it is as large as the Hubble Space Telescope Mirror size is 72 inches ~ 6 feet ~ 2 m. Most important discovery was spiral structure in the ...
... Built in 1845 by the Third Earl of Rosse In terms of size, it is as large as the Hubble Space Telescope Mirror size is 72 inches ~ 6 feet ~ 2 m. Most important discovery was spiral structure in the ...
(if any) Galaxy Properties Depend on Environment at High Redshift?
... – quiescent galaxies in high density regions (even at ow masses) have (statistically) identical morphologies to quiescent galaxies in low density regions. – However, evidence that low-mass quiescent galaxies have a relation between effective radius and U-V color (age) to z ~< 1.5. – Implies galaxy a ...
... – quiescent galaxies in high density regions (even at ow masses) have (statistically) identical morphologies to quiescent galaxies in low density regions. – However, evidence that low-mass quiescent galaxies have a relation between effective radius and U-V color (age) to z ~< 1.5. – Implies galaxy a ...
studies - European Southern Observatory
... studies of ionised gas dynamics of redshift 0.6-2.6 starforming galaxies. These were drawn from mass-selected parent samples in cosmological deep fields, and from imaging and grism surveys with the Hubble Space telescope 3, 5, 8-13, with well characterized properties (see Methods). We obtained deep ...
... studies of ionised gas dynamics of redshift 0.6-2.6 starforming galaxies. These were drawn from mass-selected parent samples in cosmological deep fields, and from imaging and grism surveys with the Hubble Space telescope 3, 5, 8-13, with well characterized properties (see Methods). We obtained deep ...
Bertoldi et al. 2003
... 1148+5651: Hyperluminous IR galaxies Detect low order CO emission in seconds, including imaging on subkpc scales. Detect high dipole moment molecules (HCO+, HCN…) in minutes (critical densities > 1e5 cm^-3). Image non-thermal emission associated with star formation and/or AGN at mas resolution ...
... 1148+5651: Hyperluminous IR galaxies Detect low order CO emission in seconds, including imaging on subkpc scales. Detect high dipole moment molecules (HCO+, HCN…) in minutes (critical densities > 1e5 cm^-3). Image non-thermal emission associated with star formation and/or AGN at mas resolution ...
CUSPS AND CORES IN GALAXIES:PROBLEMS AND - Cosmo-ufes
... -----------------------------------------------------------------------------------------------------------Dark halos with cusps (NFW, Einasto) Dark halos with constant density cores (Burkert) ...
... -----------------------------------------------------------------------------------------------------------Dark halos with cusps (NFW, Einasto) Dark halos with constant density cores (Burkert) ...
Geometrically Derived Timescales for Star Formation in Spiral
... and shocks in the neutral hydrogen gas, which in turn leads to the collapse of (molecular) gas clouds that results in star formation. This work already pointed out the basic consequences for the relative geometry of the dense cold gas reservoir1 and the emergent young stars: when viewed from a refer ...
... and shocks in the neutral hydrogen gas, which in turn leads to the collapse of (molecular) gas clouds that results in star formation. This work already pointed out the basic consequences for the relative geometry of the dense cold gas reservoir1 and the emergent young stars: when viewed from a refer ...
The Milky Way Galaxy Chapter 15 Guidepost Guidepost
... • This hot gas can break out of the galactic disk and produce a galactic fountain • As the gas cools, it falls back to the disk, spreading heavy elements throughout the galaxy ...
... • This hot gas can break out of the galactic disk and produce a galactic fountain • As the gas cools, it falls back to the disk, spreading heavy elements throughout the galaxy ...
GALAXY ZOO Backwards Faded Scaffolding Inquiry Lab constructed
... Imagine your team has been assigned the task of designing a scientific observation plan for your favorite news blog about galaxies that collide and merge into a single, larger galaxy. Describe precisely what evidence you would need to collect in order to answer the research question of, “What fracti ...
... Imagine your team has been assigned the task of designing a scientific observation plan for your favorite news blog about galaxies that collide and merge into a single, larger galaxy. Describe precisely what evidence you would need to collect in order to answer the research question of, “What fracti ...
The Milky Way
... The Galactic Center (1) Our view (in visible light) towards the galactic center (GC) is heavily obscured by gas and dust ...
... The Galactic Center (1) Our view (in visible light) towards the galactic center (GC) is heavily obscured by gas and dust ...
The Milky Way
... The Galactic Center (1) Our view (in visible light) towards the galactic center (GC) is heavily obscured by gas and dust ...
... The Galactic Center (1) Our view (in visible light) towards the galactic center (GC) is heavily obscured by gas and dust ...
Lecture 1 - Kavli IPMU
... Clusters of Galaxies: Virial Theorem here gravitational mass is derived from the motion of the member galaxies: cluster → same distance → red-shift dispersion due to relative motion ...
... Clusters of Galaxies: Virial Theorem here gravitational mass is derived from the motion of the member galaxies: cluster → same distance → red-shift dispersion due to relative motion ...
The SAMI Galaxy Survey: extraplanar gas, galactic winds, and their
... et al. 2005 for a review). The optical line-emitting gas usually presents well-defined conical structures, which are the limb-brightened parts of the expanding X-ray bubbles that also entrain the ambient cold gas. As the bubbles expand supersonically, shock waves excite optical emission lines and pr ...
... et al. 2005 for a review). The optical line-emitting gas usually presents well-defined conical structures, which are the limb-brightened parts of the expanding X-ray bubbles that also entrain the ambient cold gas. As the bubbles expand supersonically, shock waves excite optical emission lines and pr ...
witnessing the birth of the red sequence
... extreme starbursts are highly dissipative mergers of gas-rich galaxies. Key words: galaxies: high-redshift – galaxies: ISM – galaxies: starburst – submillimeter: galaxies Herschel extragalactic imaging surveys such as HerschelATLAS (Eales et al. 2010) and HerMES (Oliver et al. 2010) have covered abo ...
... extreme starbursts are highly dissipative mergers of gas-rich galaxies. Key words: galaxies: high-redshift – galaxies: ISM – galaxies: starburst – submillimeter: galaxies Herschel extragalactic imaging surveys such as HerschelATLAS (Eales et al. 2010) and HerMES (Oliver et al. 2010) have covered abo ...
pdf of talk
... W.Brissenden, C. Carilli, A.Wootten, J.Ott, K. Kellerman Also to many collaborators and coauthors of some of my own work summarized, including at this meeting – A.Marconi, A.Capetti, W.Sparks – and of course D. Axon ...
... W.Brissenden, C. Carilli, A.Wootten, J.Ott, K. Kellerman Also to many collaborators and coauthors of some of my own work summarized, including at this meeting – A.Marconi, A.Capetti, W.Sparks – and of course D. Axon ...
Family Space Day Overview – Galaxies
... Figuring out the relative distances of the Sun and Saturn requires knowledge about the relative orbits of the planets. Depending on how much astronomy background you and your child have had, the Pleiades may be placed inside the solar system or as the farthest objects in space. In general, most chil ...
... Figuring out the relative distances of the Sun and Saturn requires knowledge about the relative orbits of the planets. Depending on how much astronomy background you and your child have had, the Pleiades may be placed inside the solar system or as the farthest objects in space. In general, most chil ...
Tests for the Expansion of the Universe
... It has been known for many decades that an apparent magnitude (taking into account Kcorrections) vs. distance diagram for elliptical galaxies in clusters fits better a static rather than an expanding Universe[17]. This disagreement could, however, be solved by an increase of luminosity at higher red ...
... It has been known for many decades that an apparent magnitude (taking into account Kcorrections) vs. distance diagram for elliptical galaxies in clusters fits better a static rather than an expanding Universe[17]. This disagreement could, however, be solved by an increase of luminosity at higher red ...
Homing in on Black H..
... adjusted to its correct color and its energy is channeled along a single path, its power dwindles to about 15 watts—still bright enough that the Federal Aviation Administration requires the observatory to shut down the laser if an airplane flies near its path. From several hundred feet away the lase ...
... adjusted to its correct color and its energy is channeled along a single path, its power dwindles to about 15 watts—still bright enough that the Federal Aviation Administration requires the observatory to shut down the laser if an airplane flies near its path. From several hundred feet away the lase ...
Hubble`s Law
... allied with the large telescopes which had begun to become available, enabled observers to use the shifting of spectral lines to measure the velocities of galaxies. This was first done by Vesto Slipher in 1912. He measured the velocity of the Andromeda galaxy (M31), and found it moving towards us at ...
... allied with the large telescopes which had begun to become available, enabled observers to use the shifting of spectral lines to measure the velocities of galaxies. This was first done by Vesto Slipher in 1912. He measured the velocity of the Andromeda galaxy (M31), and found it moving towards us at ...
Read the paragraph on the left side of the book
... 1. What is the name of the galaxy we live in???? How many star make up our galaxy????? 2. How man other galaxies are out there????? How many stars do these other galaxies contain??????? 3. There are ____________ of other _____________________, and each of them contain billions of ________________. 4 ...
... 1. What is the name of the galaxy we live in???? How many star make up our galaxy????? 2. How man other galaxies are out there????? How many stars do these other galaxies contain??????? 3. There are ____________ of other _____________________, and each of them contain billions of ________________. 4 ...
Seyfert galaxy
Seyfert galaxies are one of the two largest groups of active galaxies, along with quasars. They have quasar-like nuclei (very luminous, distant and bright sources of electromagnetic radiation) with very high surface brightnesses whose spectra reveal strong, high-ionisation emission lines, but unlike quasars, their host galaxies are clearly detectable.Seyfert galaxies account for about 10% of all galaxies and are some of the most intensely studied objects in astronomy, as they are thought to be powered by the same phenomena that occur in quasars, although they are closer and less luminous than quasars. These galaxies have supermassive black holes at their centers which are surrounded by accretion discs of in-falling material. The accretion discs are believed to be the source of the observed ultraviolet radiation. Ultraviolet emission and absorption lines provide the best diagnostics for the composition of the surrounding material.Seen in visible light, most Seyfert galaxies look like normal spiral galaxies, but when studied under other wavelengths, it becomes clear that the luminosity of their cores is of comparable intensity to the luminosity of whole galaxies the size of the Milky Way.Seyfert galaxies are named after Carl Seyfert, who first described this class in 1943.