The Interstellar Medium
... The energy density of the cosmic rays in the ISM is about 1 eV/cm 3 , similar to the energy density of the diffuse interstellar radiation field. Interaction between a cosmic ray proton or heavy nucleus and the interstellar gas results in the heating of the gas, and also produces pions. The pions the ...
... The energy density of the cosmic rays in the ISM is about 1 eV/cm 3 , similar to the energy density of the diffuse interstellar radiation field. Interaction between a cosmic ray proton or heavy nucleus and the interstellar gas results in the heating of the gas, and also produces pions. The pions the ...
Into the sub-mm
... Andrew Blain (MRAO) followed with a discussion of the results of a SCUBA pilot survey for previously unknown galaxies. The results and implications of Smail, Ivison and Blain’s observations of distant lensing clusters, revealing the first sub-millimetre selected objects (including a redshift 2 galax ...
... Andrew Blain (MRAO) followed with a discussion of the results of a SCUBA pilot survey for previously unknown galaxies. The results and implications of Smail, Ivison and Blain’s observations of distant lensing clusters, revealing the first sub-millimetre selected objects (including a redshift 2 galax ...
MS 1512–CB58 - Columbia University Department of Astronomy
... Thanks to its gravitationally lensed nature, the z = 2.7276 galaxy MS 1512−cB58 (or cB58 for short) provides an unusually clear window on the population of starforming galaxies identified at these redshifts through the Lyman break technique (Steidel et al., 1996). Discovered by Yee et al. (1996), cB ...
... Thanks to its gravitationally lensed nature, the z = 2.7276 galaxy MS 1512−cB58 (or cB58 for short) provides an unusually clear window on the population of starforming galaxies identified at these redshifts through the Lyman break technique (Steidel et al., 1996). Discovered by Yee et al. (1996), cB ...
Sirius Astronomer - Orange County Astronomers
... present when the ultrafast wind was seen. This provides further evidence that the production of black hole winds somehow stifles jets. A Chandra observation made 2 months before the ultrafast wind was seen showed no evidence of the wind, so the wind apparently turns on and off over time. Astronomer ...
... present when the ultrafast wind was seen. This provides further evidence that the production of black hole winds somehow stifles jets. A Chandra observation made 2 months before the ultrafast wind was seen showed no evidence of the wind, so the wind apparently turns on and off over time. Astronomer ...
First Light for May, 2001 - South Bay Astronomical Society
... Another interesting chart presented the ranges of exo-planet sizes. Curiously, there are two peaks in exo-planet sizes. One peak occurs at about 1.3 times the size of Earth. A second peak occurs at about 2.4 times the size of Earth. Most planets seem to lie in the “Super Earth” size around the 2.4x ...
... Another interesting chart presented the ranges of exo-planet sizes. Curiously, there are two peaks in exo-planet sizes. One peak occurs at about 1.3 times the size of Earth. A second peak occurs at about 2.4 times the size of Earth. Most planets seem to lie in the “Super Earth” size around the 2.4x ...
flare swg usa
... Large telescope for point source sensitivity 2) Large-Scale Patterns in the Background Small telescope with fidelity on degree scales → the amplitude of large-scale (clustering) fluctuations proportional to total light production ...
... Large telescope for point source sensitivity 2) Large-Scale Patterns in the Background Small telescope with fidelity on degree scales → the amplitude of large-scale (clustering) fluctuations proportional to total light production ...
Measuring the masses of clusters
... Let "* = surface mass density of the spiral "gas= surface mass density of gas in the spiral #x = density of x-ray gas Then the force per unit mass required to lift a particle from the surface of the galaxy to infinity is: ...
... Let "* = surface mass density of the spiral "gas= surface mass density of gas in the spiral #x = density of x-ray gas Then the force per unit mass required to lift a particle from the surface of the galaxy to infinity is: ...
Today`s Powerpoint
... - contains young and old stars, gas, dust. Has spiral structure - vertical thickness roughly 100 pc - 2 kpc (depending on component. Most gas and dust in thinner layer, most stars in thicker layer) ...
... - contains young and old stars, gas, dust. Has spiral structure - vertical thickness roughly 100 pc - 2 kpc (depending on component. Most gas and dust in thinner layer, most stars in thicker layer) ...
Galaxies - Mike Brotherton
... Measuring the Mass of the Black Hole in the Center of the Milky Way By following the orbits of individual stars near the center of the Milky Way, the mass of the central black hole could be determined to be ~ 2.6 million solar masses. ...
... Measuring the Mass of the Black Hole in the Center of the Milky Way By following the orbits of individual stars near the center of the Milky Way, the mass of the central black hole could be determined to be ~ 2.6 million solar masses. ...
Slide 1
... •Ellipticals have lots of globular clusters (about twice that of disk galaxies) •these fall into two groups based on color •color determined by metallicity, with more metal-rich GCs (redder) possibly the result of galaxy mergers •Ellipticals have much less cool, atomic gas than spiral galaxies •< 1 ...
... •Ellipticals have lots of globular clusters (about twice that of disk galaxies) •these fall into two groups based on color •color determined by metallicity, with more metal-rich GCs (redder) possibly the result of galaxy mergers •Ellipticals have much less cool, atomic gas than spiral galaxies •< 1 ...
Galaxies Galaxies M81
... This image shows the spiral galaxy NGC 4319 and the quasar Markarian 205. The distance to NGC is 80 million light years, which Mkn 205 is 14 times farther away at a distance of 1 billion light year. The very distant quasar is nearly as bright as the much closer galaxy. The extraordinary brightness o ...
... This image shows the spiral galaxy NGC 4319 and the quasar Markarian 205. The distance to NGC is 80 million light years, which Mkn 205 is 14 times farther away at a distance of 1 billion light year. The very distant quasar is nearly as bright as the much closer galaxy. The extraordinary brightness o ...
talk
... Compared to local galaxies, high-redshift galaxies • are at least an order of magnitude more luminous in CO 3-2 – LCO = 3.5x1010 versus 2.6x109 K km/s pc2 ...
... Compared to local galaxies, high-redshift galaxies • are at least an order of magnitude more luminous in CO 3-2 – LCO = 3.5x1010 versus 2.6x109 K km/s pc2 ...
Stellar Masses
... • No Perfect Standard Candle:-Some of the methods assume peak magnitudes for various objects-Supernovae, Cepheids etc- but they are only average magnitudes.Each varies from the mean.As we move to greater distances it will be easier to detect only those at the high end of the distribution i.e.the bri ...
... • No Perfect Standard Candle:-Some of the methods assume peak magnitudes for various objects-Supernovae, Cepheids etc- but they are only average magnitudes.Each varies from the mean.As we move to greater distances it will be easier to detect only those at the high end of the distribution i.e.the bri ...
No Slide Title
... The Network for UltraViolet Astrophysics (NUVA) is a structuring activity within the OPTical Infrared COordination network for Astronomy (OPTICON). The objectives of the NUVA network are to identify needs and to develop an action plan to structure the community of European astronomers interested in ...
... The Network for UltraViolet Astrophysics (NUVA) is a structuring activity within the OPTical Infrared COordination network for Astronomy (OPTICON). The objectives of the NUVA network are to identify needs and to develop an action plan to structure the community of European astronomers interested in ...
Lecture1-1
... Estimated amount of dust reddening as a function of z-band absolute magnitude and Dn(4000). The colors of model SEDs (blue dots) and observed galaxies (black dots). Left panels shows the colors without emission line correction and right panels with emission line correction ...
... Estimated amount of dust reddening as a function of z-band absolute magnitude and Dn(4000). The colors of model SEDs (blue dots) and observed galaxies (black dots). Left panels shows the colors without emission line correction and right panels with emission line correction ...
A Possible Effect of Cosmic Rays on Celestial Chemical Composition
... heavier elements. Hence the production of Tc by this mechanism may hardly be accounted for, because the abundance of Tc is observed as large as that of' neighbouring elements. (iv) All of the abut!dance of such light nuclei is not necessarily to be explamed by the transformations due to cosmic rays. ...
... heavier elements. Hence the production of Tc by this mechanism may hardly be accounted for, because the abundance of Tc is observed as large as that of' neighbouring elements. (iv) All of the abut!dance of such light nuclei is not necessarily to be explamed by the transformations due to cosmic rays. ...
The Universe Section 1
... • Some supernovas form neutron stars and black holes. – If the core that remains after a supernova has a mass of 1.4 to 3 solar masses, the remnant can become a neutron star. – If the leftover core has a mass that is greater than three solar masses, it will collapse to form a black hole. • black hol ...
... • Some supernovas form neutron stars and black holes. – If the core that remains after a supernova has a mass of 1.4 to 3 solar masses, the remnant can become a neutron star. – If the leftover core has a mass that is greater than three solar masses, it will collapse to form a black hole. • black hol ...
Learning goals for Astronomy`s Final 2013
... Coordinate systems: Azimuth and altitude; right ascension and declination 6. Explain azimuth and altitude as parts of a celestial coordinate system. Include when are they useful 7. Find objects in the sky by computing altitude and azimuth using your hand o If your fist fits 9 times between the horiz ...
... Coordinate systems: Azimuth and altitude; right ascension and declination 6. Explain azimuth and altitude as parts of a celestial coordinate system. Include when are they useful 7. Find objects in the sky by computing altitude and azimuth using your hand o If your fist fits 9 times between the horiz ...
The Milky Way and other Galaxies
... Measuring the Mass of the Black Hole in the Center of the Milky Way By following the orbits of individual stars near the center of the Milky Way, the mass of the central black hole could be determined to be ~ 4 million solar masses. ...
... Measuring the Mass of the Black Hole in the Center of the Milky Way By following the orbits of individual stars near the center of the Milky Way, the mass of the central black hole could be determined to be ~ 4 million solar masses. ...
Document
... Clarify difference in evolution for low- and high-mass star and sketch changes of star's properties in HR diagram with an evolutionary track. Describe causes for stellar collapse (“death”) and the features of supernova explosions, including the emergence of new planetary nebulas and protostars. ...
... Clarify difference in evolution for low- and high-mass star and sketch changes of star's properties in HR diagram with an evolutionary track. Describe causes for stellar collapse (“death”) and the features of supernova explosions, including the emergence of new planetary nebulas and protostars. ...
Determining Distances to Other Galaxies
... spectral emission lines Vr stays roughly constant with R as far as luminous matter can be detected Masses from 1011 to 2x1012 Msun 50% to 80% of mass is Dark matter. DM does not have to be confined to the disk – distributed spherically ...
... spectral emission lines Vr stays roughly constant with R as far as luminous matter can be detected Masses from 1011 to 2x1012 Msun 50% to 80% of mass is Dark matter. DM does not have to be confined to the disk – distributed spherically ...