Part2
... Some things to take away: o Azimuthally averaged, CO emission looks pretty similar to stars (there are important differences, but this is a good place to start): an exponential decline with a scale length ~0.2 to 0.25 times the optical radius. o The exponential decline is a mix of filling factor (e. ...
... Some things to take away: o Azimuthally averaged, CO emission looks pretty similar to stars (there are important differences, but this is a good place to start): an exponential decline with a scale length ~0.2 to 0.25 times the optical radius. o The exponential decline is a mix of filling factor (e. ...
Expanding Earth and Static Universe: Two Papers of 1935
... The quantity D >> r is a measure of the distance over which the gravitational “drag” operates, and ρ is the average density of matter in the universe, which Zwicky took to lie in the interval 10-25 > ρ > 10-31 g cm-3. He found the gravitational-drag explanation to be “in qualitative accordance with ...
... The quantity D >> r is a measure of the distance over which the gravitational “drag” operates, and ρ is the average density of matter in the universe, which Zwicky took to lie in the interval 10-25 > ρ > 10-31 g cm-3. He found the gravitational-drag explanation to be “in qualitative accordance with ...
Neistein_dekel60
... The history of one galaxy We follow all the particles, and check which got heated/cooled/SF/accreted ...
... The history of one galaxy We follow all the particles, and check which got heated/cooled/SF/accreted ...
US - Real Science
... In most starbursts the surge in starbirth is _________ when two galaxies come too close together. Mutual attraction _______ the galaxies causes immense turmoil in their gas and ____, and triggers the burst of star formation. NGC ______ appearance shows it has seen troubled times. Its spiral ____ lo ...
... In most starbursts the surge in starbirth is _________ when two galaxies come too close together. Mutual attraction _______ the galaxies causes immense turmoil in their gas and ____, and triggers the burst of star formation. NGC ______ appearance shows it has seen troubled times. Its spiral ____ lo ...
No Slide Title
... Who was the Polish astronomer and mathematician who advocated that the Earth turned daily about its axis and ...
... Who was the Polish astronomer and mathematician who advocated that the Earth turned daily about its axis and ...
Standing in Awe - Auckland Astronomical Society
... Libra lies prominently in the June sky, preceding the Scorpion across the sky. At 538° square in size, Libra is one of the larger constellations, though its stars are poorly shown, the brightest attaining magnitude 2.6. In fact, Libra is one of the poorer adorned constellations, there being only 2.4 ...
... Libra lies prominently in the June sky, preceding the Scorpion across the sky. At 538° square in size, Libra is one of the larger constellations, though its stars are poorly shown, the brightest attaining magnitude 2.6. In fact, Libra is one of the poorer adorned constellations, there being only 2.4 ...
Starburst Galaxies Encyclopedia of Astronomy & Astrophysics eaa.iop.org T Heckman
... of interstellar gas in the starburst divided by the present rate of star formation. This is then a rough estimate of how much longer the starburst can be sustained before running out of gas. Gas-depletion times in starbursts are usually of order 108 yr, but they are highly uncertain for many reasons ...
... of interstellar gas in the starburst divided by the present rate of star formation. This is then a rough estimate of how much longer the starburst can be sustained before running out of gas. Gas-depletion times in starbursts are usually of order 108 yr, but they are highly uncertain for many reasons ...
INTERSTELLAR SPACE
... formation of the galaxy and the generation of' a general magnetic field. However, the field is probably not in equilibrium at present so that we cannot compute its value vd thout making assumptions oone erning the initial conditions. many rotating astronomioal bodies havo ...
... formation of the galaxy and the generation of' a general magnetic field. However, the field is probably not in equilibrium at present so that we cannot compute its value vd thout making assumptions oone erning the initial conditions. many rotating astronomioal bodies havo ...
Chapter 1: Introduction to Galaxies File - QMplus
... amounts to 1-20% of their visible mass (the rest of the visible mass is stars). This gas shows active star formation. The discs contain stars having a range of ages as a result of this continuing star formation. Spiral arms are apparent in the discs, defined by young, luminous stars and by H II regi ...
... amounts to 1-20% of their visible mass (the rest of the visible mass is stars). This gas shows active star formation. The discs contain stars having a range of ages as a result of this continuing star formation. Spiral arms are apparent in the discs, defined by young, luminous stars and by H II regi ...
The Strikingly Uniform, Highly Turbulent Interstellar Medium of the
... (Assef et al. 2015; Tsai et al. 2015). Detailed analyses of their spectral energy distributions (SEDs) show that the rest-frame UV–near-IR emission of most Hot DOGs is consistent with a typically star-forming, not strongly obscured underlying host galaxy. Such luminous AGN, ...
... (Assef et al. 2015; Tsai et al. 2015). Detailed analyses of their spectral energy distributions (SEDs) show that the rest-frame UV–near-IR emission of most Hot DOGs is consistent with a typically star-forming, not strongly obscured underlying host galaxy. Such luminous AGN, ...
File 11 - School of Astronomy, IPM
... • NGC New General Catalogue (Dreyer 1888) had 7840 objects, of which ~50% were galaxies • In the 20th century, many catalogs were produced RSA, UGC, RC3 etc. • Nowadays there are automated surveys, e.g. Sloan Digital Sky Survey (SDSS) with tens of hundreds of millions of galaxies Galaxy Zoo or Zoo U ...
... • NGC New General Catalogue (Dreyer 1888) had 7840 objects, of which ~50% were galaxies • In the 20th century, many catalogs were produced RSA, UGC, RC3 etc. • Nowadays there are automated surveys, e.g. Sloan Digital Sky Survey (SDSS) with tens of hundreds of millions of galaxies Galaxy Zoo or Zoo U ...
Gamma-Ray Bursts: The Brightest Explosions in the Universe Arne
... (Introduction to the The ultra-luminous Universe: Gamma-Ray Bursts and Active Galactic Nuclei Session) ...
... (Introduction to the The ultra-luminous Universe: Gamma-Ray Bursts and Active Galactic Nuclei Session) ...
ASPEN WORKSHOP 2003
... Lstar spheroids may be a good description K=20 Cimatti suvey is consistent Daddi et al (FIRES) showed that red objects are much more strongly clustered than LBGs, so they are best elliptical precursors Strongly correlated population is always that way, so unlikely that LBGs will ever evolve into ell ...
... Lstar spheroids may be a good description K=20 Cimatti suvey is consistent Daddi et al (FIRES) showed that red objects are much more strongly clustered than LBGs, so they are best elliptical precursors Strongly correlated population is always that way, so unlikely that LBGs will ever evolve into ell ...
ATA2010
... Binney & Tremaine: Galactic Dynamics (1987, 2008). The dynamical lectures are partly based on this book, which is the best book on the subject. It covers far more ground than we can cover in these lectures. Binney & Merrifield: Galactic Astronomy (1998). This is a more descriptive book and well wort ...
... Binney & Tremaine: Galactic Dynamics (1987, 2008). The dynamical lectures are partly based on this book, which is the best book on the subject. It covers far more ground than we can cover in these lectures. Binney & Merrifield: Galactic Astronomy (1998). This is a more descriptive book and well wort ...
Physics of Star Formation: Milky Way and Beyond
... Laura Zschaechner - The Impact on Galactic-Scale Molecular Outflows on Star Formation: ALMA Observations of Circinus and NGC 253 Galactic outflows are poorly understood although they are essential to feedback processes that quench star formation and limit the total mass of large galaxies. Thus, insu ...
... Laura Zschaechner - The Impact on Galactic-Scale Molecular Outflows on Star Formation: ALMA Observations of Circinus and NGC 253 Galactic outflows are poorly understood although they are essential to feedback processes that quench star formation and limit the total mass of large galaxies. Thus, insu ...
general relativity and gravitational waves
... When we draw spherical coordinates on a sphere, and follow two lines, that are perpendicular to the equation, in the direction of the North pole, we observe that two initial parallel lines meet at a point on the curved surface. The fifth postulate of Euclid does not hold for a curved space: parallel ...
... When we draw spherical coordinates on a sphere, and follow two lines, that are perpendicular to the equation, in the direction of the North pole, we observe that two initial parallel lines meet at a point on the curved surface. The fifth postulate of Euclid does not hold for a curved space: parallel ...
A Tour of the Radio Universe
... the sharp Hubble images. Most of the pale, white objects sprinkled around the body of M82 that look like fuzzy stars are actually individual star clusters about 20 light-years across and contain up to a million stars. The rapid rate of star formation in this galaxy eventually will be self-limiting. ...
... the sharp Hubble images. Most of the pale, white objects sprinkled around the body of M82 that look like fuzzy stars are actually individual star clusters about 20 light-years across and contain up to a million stars. The rapid rate of star formation in this galaxy eventually will be self-limiting. ...
Star formation and internal kinematics of irregular galaxies
... the picture that I will proceed with in this thesis; that star formation is a local process, with the same basic physics occuring in independent cells with dimensions between tens of parsecs and a couple of kiloparsecs. Thus a galaxy’s global structure and dynamics can be viewed as an organising fra ...
... the picture that I will proceed with in this thesis; that star formation is a local process, with the same basic physics occuring in independent cells with dimensions between tens of parsecs and a couple of kiloparsecs. Thus a galaxy’s global structure and dynamics can be viewed as an organising fra ...
Cartwheel Galaxy - Chandra X
... 10. A study of ULXs has determined that very few X-ray sources with luminosity greater than 1040 erg s−1 remain after ~15 Myr and few remain after ~30 Myr. 11. In the Cartwheel galaxy, it appears that a shock wave is moving radially outward in the disk. 9 sources of the 21 detected in the Chandra im ...
... 10. A study of ULXs has determined that very few X-ray sources with luminosity greater than 1040 erg s−1 remain after ~15 Myr and few remain after ~30 Myr. 11. In the Cartwheel galaxy, it appears that a shock wave is moving radially outward in the disk. 9 sources of the 21 detected in the Chandra im ...
Our Place in Space
... Globular Cluster, Large Magellanic Cloud, Andromeda Galaxy, one of the Galaxy Clusters (Stephan’s Quintet or Virgo Supercluster; Although Stephan’s Quintet is further from Earth it is impossible for a student to know this just from knowing that the image shows a galaxy cluster), Hubble Deep Field ...
... Globular Cluster, Large Magellanic Cloud, Andromeda Galaxy, one of the Galaxy Clusters (Stephan’s Quintet or Virgo Supercluster; Although Stephan’s Quintet is further from Earth it is impossible for a student to know this just from knowing that the image shows a galaxy cluster), Hubble Deep Field ...
Robert_Minchin_Galaxies_2011_REU
... tells us how gas-rich a galaxy is. – Gas-rich galaxies are often blue, late-type galaxies with active star formation. – Some are more intriguing objects with low SF rates. A number of these have been turned up by HI surveys. ...
... tells us how gas-rich a galaxy is. – Gas-rich galaxies are often blue, late-type galaxies with active star formation. – Some are more intriguing objects with low SF rates. A number of these have been turned up by HI surveys. ...
talk
... Baryonic fraction for NGC 3741 (within the extent of the gas disk) ~ 0.18 ► comparable to other galaxies with less extended HI disk No evidence for baryon loss (measured within the extent of gas disk) in faint dwarf galaxies (contradiction to simulations of galaxy formation !) To reconcile rot ...
... Baryonic fraction for NGC 3741 (within the extent of the gas disk) ~ 0.18 ► comparable to other galaxies with less extended HI disk No evidence for baryon loss (measured within the extent of gas disk) in faint dwarf galaxies (contradiction to simulations of galaxy formation !) To reconcile rot ...
Slides from the fourth lecture
... Associated with explosions of Massive stars Their underlying continuum is smooth power law ...
... Associated with explosions of Massive stars Their underlying continuum is smooth power law ...
DTU_9e_ch15
... the distribution of hydrogen gas in a face-on view of the Galaxy. This view just hints at spiral structure. The galactic nucleus is marked with a dot surrounded by a circle. Details in the large, blank, wedge-shaped region toward the upper left of the map are unknown, because gas in this part of the ...
... the distribution of hydrogen gas in a face-on view of the Galaxy. This view just hints at spiral structure. The galactic nucleus is marked with a dot surrounded by a circle. Details in the large, blank, wedge-shaped region toward the upper left of the map are unknown, because gas in this part of the ...
PH607lec12-5gal3
... Low Surface brightness galaxies (LSB) Very difficult to detect! Need dedicated surveys Recent automated CCD surveys suggest there may be more LSB galaxies than all the other types of galaxy put together Peculiar Galaxies In particular, interacting galaxies Many cataloged by Arp in 1966 ...
... Low Surface brightness galaxies (LSB) Very difficult to detect! Need dedicated surveys Recent automated CCD surveys suggest there may be more LSB galaxies than all the other types of galaxy put together Peculiar Galaxies In particular, interacting galaxies Many cataloged by Arp in 1966 ...