... Studies of ice core show that concentrations of CO2 have not been so high for nearly half a million years. At the current rate of increase, they will have reached 800 ppm by the end of the 21st century! Beyond 550 ppm it would not be liveable! CO2 being emitted stays in the atmosphere for up to 200 ...
Word
... Now that you have used Hubble’s constant on your own, describe the significance of Hubble’s constant in your own words. Consider these questions in your explanation. 1. Does the Universe have edges or a center? 2. What does this mean in terms of expansion? 3. Is expansion technically relative to the ...
... Now that you have used Hubble’s constant on your own, describe the significance of Hubble’s constant in your own words. Consider these questions in your explanation. 1. Does the Universe have edges or a center? 2. What does this mean in terms of expansion? 3. Is expansion technically relative to the ...
Facilitator`s Guide PDF
... Video: In this program we hear from two researchers who are investigating the effects and origin of dark energy. Robert Kirshner, at the Harvard-Smithsonian Center for Astrophysics is investigating what this dark energy may be. He studies distant supernovae to gain a better understanding of how this ...
... Video: In this program we hear from two researchers who are investigating the effects and origin of dark energy. Robert Kirshner, at the Harvard-Smithsonian Center for Astrophysics is investigating what this dark energy may be. He studies distant supernovae to gain a better understanding of how this ...
Order of Magnitude Icebreaker
... ★ Use your physical intuition, not google! ★ Remember: Multiple approaches possible! ...
... ★ Use your physical intuition, not google! ★ Remember: Multiple approaches possible! ...
A Tidal Disruption Event Candidate from the 2XMM Catalog
... our 2013 Chandra observation, with peak luminosity near 1044 erg/s and lying toward the center of an inactive galaxy, thus probably a tidal disruption event. From its two ultrasoft Xray observations near the peak of unprecedented quality, we gain more insights into such event ...
... our 2013 Chandra observation, with peak luminosity near 1044 erg/s and lying toward the center of an inactive galaxy, thus probably a tidal disruption event. From its two ultrasoft Xray observations near the peak of unprecedented quality, we gain more insights into such event ...
2. The X-ray-Radio correlation for bulgeless galaxies
... Correlations between the X-ray and Radio emissions are observed for both galaxies with Active Galactic Nuclei (AGN) and in Star Forming galaxies. For the first case, the Xray/Radio correlation seems to present different slopes for Radio-loud and Radio-quiet AGN and may be used to estimate the mass o ...
... Correlations between the X-ray and Radio emissions are observed for both galaxies with Active Galactic Nuclei (AGN) and in Star Forming galaxies. For the first case, the Xray/Radio correlation seems to present different slopes for Radio-loud and Radio-quiet AGN and may be used to estimate the mass o ...
May 2017 - Bays Mountain Park
... overall, behind Hydra. Virgo is easily found through its brightest star, Spica. There is also an abundance of deep-sky objects in this constellation. Some of them include: M104 (also known as the Sombrero Galaxy), M49, M58, M59, M60, M61, M84, M86, M87, M89, and M90. All of these are galaxies, eithe ...
... overall, behind Hydra. Virgo is easily found through its brightest star, Spica. There is also an abundance of deep-sky objects in this constellation. Some of them include: M104 (also known as the Sombrero Galaxy), M49, M58, M59, M60, M61, M84, M86, M87, M89, and M90. All of these are galaxies, eithe ...
Dennett-Thorpe-deBruyn,2002
... scattering material cannot be directly compared to radial velocity measurements of HI, but we note that there is no anomalous feature known in this direction[16]. A nearby pulsar J1813+4013 has an unremarkable dispersion and rotation measures (42 cm−3 pc and 47 rad m−2 )[17], although the medium in ...
... scattering material cannot be directly compared to radial velocity measurements of HI, but we note that there is no anomalous feature known in this direction[16]. A nearby pulsar J1813+4013 has an unremarkable dispersion and rotation measures (42 cm−3 pc and 47 rad m−2 )[17], although the medium in ...
Talk - The Department of Astronomy and Astrophysics
... Tri-color images (g-r-i images) FITS files (single-wavelength B/W images) Magnitudes through each filter Object type (star or galaxy) Status (i.e. good seeing, cosmic rays, etc.) Flags (i.e. saturated pixels, moving object, etc) • Photometric redshifts ...
... Tri-color images (g-r-i images) FITS files (single-wavelength B/W images) Magnitudes through each filter Object type (star or galaxy) Status (i.e. good seeing, cosmic rays, etc.) Flags (i.e. saturated pixels, moving object, etc) • Photometric redshifts ...
Low-Res Version - Chandra X
... human eye and brain perceive different wavelengths of light in the visible part of the electromagnetic spectrum. X-rays, and other wavelengths such as radio, infra-red, ultra-violet and gamma, cannot be seen with the human eye, and thus do not have any "color". To see the invisible wavelengths, we n ...
... human eye and brain perceive different wavelengths of light in the visible part of the electromagnetic spectrum. X-rays, and other wavelengths such as radio, infra-red, ultra-violet and gamma, cannot be seen with the human eye, and thus do not have any "color". To see the invisible wavelengths, we n ...
Some Introductory Physics of Sound
... complete vacuum. There is matter lying between the stars – and even between galaxies – in space. These may not form an ‘atmosphere’ as we would obviously recognise it, as such regions are at much lower densities than we ever experience on Earth. The air molecules in this room only occupy about 1/100 ...
... complete vacuum. There is matter lying between the stars – and even between galaxies – in space. These may not form an ‘atmosphere’ as we would obviously recognise it, as such regions are at much lower densities than we ever experience on Earth. The air molecules in this room only occupy about 1/100 ...
Set 2: Nature of Galaxies
... • Non-constancy of the Ωlp will still cause winding but of the pattern and typically at a slower rate for (1, 2). • Where the local pattern speed matches the global pattern speed Lindblad resonances occur where the epicyclic amplitude increases due to forcing from the local density enhancement - can ...
... • Non-constancy of the Ωlp will still cause winding but of the pattern and typically at a slower rate for (1, 2). • Where the local pattern speed matches the global pattern speed Lindblad resonances occur where the epicyclic amplitude increases due to forcing from the local density enhancement - can ...
The environment of high-redshift AGN OLIMPIA JUDIT FOGASY
... In order to determine the properties of the companion galaxy, we construct and model its spectral energy distribution (SED). We find that the companion galaxy is a heavily dustobscured (AV & 2.8), star-forming galaxy, with a star formation rate of ∼ 1000 M yr−1 . To test the uniqueness of this syst ...
... In order to determine the properties of the companion galaxy, we construct and model its spectral energy distribution (SED). We find that the companion galaxy is a heavily dustobscured (AV & 2.8), star-forming galaxy, with a star formation rate of ∼ 1000 M yr−1 . To test the uniqueness of this syst ...
Hubble Deep Field
The Hubble Deep Field (HDF) is an image of a small region in the constellation Ursa Major, constructed from a series of observations by the Hubble Space Telescope. It covers an area 2.5 arcminutes across, about one 24-millionth of the whole sky, which is equivalent in angular size to a 65 mm tennis ball at a distance of 100 metres. The image was assembled from 342 separate exposures taken with the Space Telescope's Wide Field and Planetary Camera 2 over ten consecutive days between December 18 and December 28, 1995.The field is so small that only a few foreground stars in the Milky Way lie within it; thus, almost all of the 3,000 objects in the image are galaxies, some of which are among the youngest and most distant known. By revealing such large numbers of very young galaxies, the HDF has become a landmark image in the study of the early universe, with the associated scientific paper having received over 900 citations by the end of 2014.Three years after the HDF observations were taken, a region in the south celestial hemisphere was imaged in a similar way and named the Hubble Deep Field South. The similarities between the two regions strengthened the belief that the universe is uniform over large scales and that the Earth occupies a typical region in the Universe (the cosmological principle). A wider but shallower survey was also made as part of the Great Observatories Origins Deep Survey. In 2004 a deeper image, known as the Hubble Ultra-Deep Field (HUDF), was constructed from a few months of light exposure. The HUDF image was at the time the most sensitive astronomical image ever made at visible wavelengths, and it remained so until the Hubble Extreme Deep Field (XDF) was released in 2012.