The environment of high-redshift AGN OLIMPIA JUDIT FOGASY
... amount of X-ray gas in their halo, while disky ellipticals tend to be smaller in size and lack the hot X-ray gas component. Spiral galaxies have more structure, they contain a thin rotating disk, a central, dense region of stars called bulge and in some cases bars. Bulges can be divided into two gro ...
... amount of X-ray gas in their halo, while disky ellipticals tend to be smaller in size and lack the hot X-ray gas component. Spiral galaxies have more structure, they contain a thin rotating disk, a central, dense region of stars called bulge and in some cases bars. Bulges can be divided into two gro ...
PLUTO - Department of Earth and Planetary Sciences, Northwestern
... Search for the 9th planet in the solar system has long been the ambition of many astronomers. Neptune has officially been claimed as the 8 th planet of our solar system since 1781 (although it's also observable to naked eyes) 9, but astronomers have been looking for a massive enough object (Planet X ...
... Search for the 9th planet in the solar system has long been the ambition of many astronomers. Neptune has officially been claimed as the 8 th planet of our solar system since 1781 (although it's also observable to naked eyes) 9, but astronomers have been looking for a massive enough object (Planet X ...
Brightest Stars : Discovering the Universe Through the Sky`s Most
... star’s environment of season and constellations, of earth and the sky. Each profile also offers the lore and legends connected with the star, for these are a measure of what the human race as a whole has found interesting and individual about the star. A key part of each profile, of course, is also ...
... star’s environment of season and constellations, of earth and the sky. Each profile also offers the lore and legends connected with the star, for these are a measure of what the human race as a whole has found interesting and individual about the star. A key part of each profile, of course, is also ...
SOHO`s Frequently Asked Questions
... important nuclear reactions are taking place. It occupies the innermost quarter or so of the Sun's radius. Here, the temperature is 15 million Kelvin (or 27 million degrees Fahrenheit) and the density is 13 times greater than lead. Energy radiates from the core to about 80% of the way to the surface ...
... important nuclear reactions are taking place. It occupies the innermost quarter or so of the Sun's radius. Here, the temperature is 15 million Kelvin (or 27 million degrees Fahrenheit) and the density is 13 times greater than lead. Energy radiates from the core to about 80% of the way to the surface ...
galileo and the discovery of the phases of venus
... from the superior conjunction of May 1610 to the superior conjunction of December 1611. Both apparent size and phase varied enormously, though not following a uniform pattern of change. Galileo’s expression “when Venus began to be visible in the evening sky” can only refer to some time in the late s ...
... from the superior conjunction of May 1610 to the superior conjunction of December 1611. Both apparent size and phase varied enormously, though not following a uniform pattern of change. Galileo’s expression “when Venus began to be visible in the evening sky” can only refer to some time in the late s ...
– 1 – 1. Galaxy Observations 1.1.
... rate affecting the UV continuum, and the calibration for UV stellar photospheric features or UV ISM absorption to metallicity is not well understood at present (see Erb 2010 for details). So the best approach is to move into the near-IR, where the normal optical low redshift techniques and calibrati ...
... rate affecting the UV continuum, and the calibration for UV stellar photospheric features or UV ISM absorption to metallicity is not well understood at present (see Erb 2010 for details). So the best approach is to move into the near-IR, where the normal optical low redshift techniques and calibrati ...
Science Bowl Questions and Answers
... ASTR-91; Multiple Choice: The LAST manned moon flight was made in what year? w) 1971 x) 1972 y) 1973 z) 1974 ANSWER: X -- 1972 ASTR-91; Multiple Choice: The cosmic background radiation, a remnant of the Big Bang, is at what temperature? w) 100K x) 0K y) 5.3K z) 2.7K ANSWER: Z -- 2.7K ASTR-91; Short ...
... ASTR-91; Multiple Choice: The LAST manned moon flight was made in what year? w) 1971 x) 1972 y) 1973 z) 1974 ANSWER: X -- 1972 ASTR-91; Multiple Choice: The cosmic background radiation, a remnant of the Big Bang, is at what temperature? w) 100K x) 0K y) 5.3K z) 2.7K ANSWER: Z -- 2.7K ASTR-91; Short ...
THE MORPHOLOGICAL DEMOGRAPHICS OF GALAXIES IN THE
... were f (R) = 2π 0R I(r)dr is the integrated flux within the radius R. The determination of the radius R up to where to integrate the light is of importance particularly for the asymmetry values. As we sample galaxies over ever larger cosmic ages, the surface brightness of galaxies at higher redshift ...
... were f (R) = 2π 0R I(r)dr is the integrated flux within the radius R. The determination of the radius R up to where to integrate the light is of importance particularly for the asymmetry values. As we sample galaxies over ever larger cosmic ages, the surface brightness of galaxies at higher redshift ...
National Aeronautics and Space Administration
... classes and in my astrophysics classes. I may take what you have and add calculus or whatever other complications happen, and then they see something other than “Consider a particle of mass ‘m’ and speed ‘v’ that…” (Associate Professor of Physics) "Space Math has more up-to-date applications than ar ...
... classes and in my astrophysics classes. I may take what you have and add calculus or whatever other complications happen, and then they see something other than “Consider a particle of mass ‘m’ and speed ‘v’ that…” (Associate Professor of Physics) "Space Math has more up-to-date applications than ar ...
Article PDF - IOPscience
... morphological and physical evidence for undergoing higher than average star formation as compared to galaxies in the nearby universe, we examine the morphological properties of five nearby starburst galaxies that are generally regarded as the best analogs of high-redshift star-forming systems (e.g., ...
... morphological and physical evidence for undergoing higher than average star formation as compared to galaxies in the nearby universe, we examine the morphological properties of five nearby starburst galaxies that are generally regarded as the best analogs of high-redshift star-forming systems (e.g., ...
Astronomy Astrophysics - Niels Bohr Institutet
... also recalibrated and redetermined the astrophysical parameters (T eff , Mv , and [Fe/H]) for all stars in our sample. Much effort has been devoted to the fundamental issue of determining reliable isochrone ages for as many stars as possible, and we believe that a rather more realistic assessment of t ...
... also recalibrated and redetermined the astrophysical parameters (T eff , Mv , and [Fe/H]) for all stars in our sample. Much effort has been devoted to the fundamental issue of determining reliable isochrone ages for as many stars as possible, and we believe that a rather more realistic assessment of t ...
Elliptical Galaxies
... considerable scatter. These statistical studies suggest that intrinsically spherical galaxies are rare but, for example, cannot rule out a distribution of intrinsic shapes that is a mixture of oblate and prolate figures. The discovery that elliptical galaxies are not flattened by their rotation has ...
... considerable scatter. These statistical studies suggest that intrinsically spherical galaxies are rare but, for example, cannot rule out a distribution of intrinsic shapes that is a mixture of oblate and prolate figures. The discovery that elliptical galaxies are not flattened by their rotation has ...
from z=0 to z=1
... 10 times fainter than ULIRGs. 6. LBGs and SCUBA galaxies (UV and IR selected galaxies at z~3) do not overlap with each other very much. SCUBA galaxies have significantly higher SFR, higher attenuation, higher stellar mass, and higher correlation length than LBGs. 7. At intermediate redshifts of z~0. ...
... 10 times fainter than ULIRGs. 6. LBGs and SCUBA galaxies (UV and IR selected galaxies at z~3) do not overlap with each other very much. SCUBA galaxies have significantly higher SFR, higher attenuation, higher stellar mass, and higher correlation length than LBGs. 7. At intermediate redshifts of z~0. ...
Clusters as laboratories for the study of galaxy evolution
... “On the evolutionary status of early-type galaxies in clusters at z ~ 0.2 I. The Fundamental Plane” – Fritz et al. 2005 MNRAS, 358, 233 Photometry, morphology, and spectra for galaxies in A2390 & A2218 “For the total sample of 34 E+S0 cluster galaxies which enter the FP we deduce only a mild evolut ...
... “On the evolutionary status of early-type galaxies in clusters at z ~ 0.2 I. The Fundamental Plane” – Fritz et al. 2005 MNRAS, 358, 233 Photometry, morphology, and spectra for galaxies in A2390 & A2218 “For the total sample of 34 E+S0 cluster galaxies which enter the FP we deduce only a mild evolut ...
Measurement of the earthshine polarization in the B, V, R, and I
... Context. Earth-like, extra-solar planets may soon become observable with upcoming high contrast polarimeters. Therefore, the characterization of the polarimetric properties of the planet Earth is important for the interpretation of expected observations and the planning of future instruments. Aims. ...
... Context. Earth-like, extra-solar planets may soon become observable with upcoming high contrast polarimeters. Therefore, the characterization of the polarimetric properties of the planet Earth is important for the interpretation of expected observations and the planning of future instruments. Aims. ...
Astronomy
... gases above 107 (10 million) kelvins, and thermal emission from thick gases above 107 Kelvin.[33] Since X-rays are absorbed by the Earth's atmosphere, all X-ray observations must be performed from high-altitude balloons, rockets, or spacecraft. Notable X-ray sources include X-ray binaries, pulsars, ...
... gases above 107 (10 million) kelvins, and thermal emission from thick gases above 107 Kelvin.[33] Since X-rays are absorbed by the Earth's atmosphere, all X-ray observations must be performed from high-altitude balloons, rockets, or spacecraft. Notable X-ray sources include X-ray binaries, pulsars, ...
manual .
... in the history of science. It was an astonishing leap in the understanding of Nature made by giant intellects. During the more than three centuries since Newton, very convincing observational support for the laws of classical Newtonian mechanics is found in the motions of various celestial bodies— n ...
... in the history of science. It was an astonishing leap in the understanding of Nature made by giant intellects. During the more than three centuries since Newton, very convincing observational support for the laws of classical Newtonian mechanics is found in the motions of various celestial bodies— n ...
Chemical Evolution of Galactic Systems
... models, in order to gain insight into the protogalaxy’s age and star formation history. We continue investigating the high-redshift universe, turning our attention to the issue of space-time variations in the fine-structure constant, as suggested by quasar absorption-line constraints. An excess abun ...
... models, in order to gain insight into the protogalaxy’s age and star formation history. We continue investigating the high-redshift universe, turning our attention to the issue of space-time variations in the fine-structure constant, as suggested by quasar absorption-line constraints. An excess abun ...
Rare Earth hypothesis
In planetary astronomy and astrobiology, the Rare Earth Hypothesis argues that the origin of life and the evolution of biological complexity such as sexually reproducing, multicellular organisms on Earth (and, subsequently, human intelligence) required an improbable combination of astrophysical and geological events and circumstances. The hypothesis argues that complex extraterrestrial life is a very improbable phenomenon and likely to be extremely rare. The term ""Rare Earth"" originates from Rare Earth: Why Complex Life Is Uncommon in the Universe (2000), a book by Peter Ward, a geologist and paleontologist, and Donald E. Brownlee, an astronomer and astrobiologist, both faculty members at the University of Washington.An alternative view point was argued by Carl Sagan and Frank Drake, among others. It holds that Earth is a typical rocky planet in a typical planetary system, located in a non-exceptional region of a common barred-spiral galaxy. Given the principle of mediocrity (also called the Copernican principle), it is probable that the universe teems with complex life. Ward and Brownlee argue to the contrary: that planets, planetary systems, and galactic regions that are as friendly to complex life as are the Earth, the Solar System, and our region of the Milky Way are very rare.