PHY216_lect3_2014_sub
... Universal Time is the name by which Greenwich Mean Time (GMT) became known for scientific purposes in 1928. UT is based on the daily rotation of the Earth. However, the Earth’s rotation is somewhat irregular and can therefore no longer be used as a precise system of time. Versions of UT: UT1: • The ...
... Universal Time is the name by which Greenwich Mean Time (GMT) became known for scientific purposes in 1928. UT is based on the daily rotation of the Earth. However, the Earth’s rotation is somewhat irregular and can therefore no longer be used as a precise system of time. Versions of UT: UT1: • The ...
2Discovering the Universe for Yourself
... The Local Sky The celestial sphere provides a useful way of thinking about the appearance of the universe from Earth. But it is not what we actually see when we go outside. Instead, your local sky—the sky as seen from wherever you happen to be standing—appears to take the shape of a hemisphere or d ...
... The Local Sky The celestial sphere provides a useful way of thinking about the appearance of the universe from Earth. But it is not what we actually see when we go outside. Instead, your local sky—the sky as seen from wherever you happen to be standing—appears to take the shape of a hemisphere or d ...
Spectral Matching for Elemental Abundances of Evolved Stars of Globular Clusters
... oxygen-rich or oxygen-poor. From this a catalogue of abundances of iron, carbon and barium of 848 giant branch stars were determined, of which 557 also had well-defined nitrogen abundances. k-means clustering analysis was used to group the stars in ω Cen into four homogeneous groups based upon these ...
... oxygen-rich or oxygen-poor. From this a catalogue of abundances of iron, carbon and barium of 848 giant branch stars were determined, of which 557 also had well-defined nitrogen abundances. k-means clustering analysis was used to group the stars in ω Cen into four homogeneous groups based upon these ...
Elliptical Galaxies
... where Re , the effective radius, is the radius that contains half the total light of the galaxy and Ie is the surface brightness (the amount of light from a square arc second of the galaxy) at Re . This law can be integrated to give a finite total light of Itot = 7.22πRe 2 Ie . de Vaucouleurs’ law, ...
... where Re , the effective radius, is the radius that contains half the total light of the galaxy and Ie is the surface brightness (the amount of light from a square arc second of the galaxy) at Re . This law can be integrated to give a finite total light of Itot = 7.22πRe 2 Ie . de Vaucouleurs’ law, ...
2012 NSS Phy 2-(E).
... (c) In 2011, some media reports suggested that when Betelgeuse undergoes a supernova explosion (i.e. the death of a star), it will appear as the “second sun” in the sky for a few weeks. Referring to the information given below, explain whether this is true or not by comparing the brightness of Betel ...
... (c) In 2011, some media reports suggested that when Betelgeuse undergoes a supernova explosion (i.e. the death of a star), it will appear as the “second sun” in the sky for a few weeks. Referring to the information given below, explain whether this is true or not by comparing the brightness of Betel ...
Astronomy 10
... Nebraska-Lincoln. They've made some really great simulations, and you'll see links to many of them as you scroll down on this page. When you see an `image link' to one of the simulations, I recommend right-clicking it and selecting `Open In New Tab'. That way, you can click back and forth between th ...
... Nebraska-Lincoln. They've made some really great simulations, and you'll see links to many of them as you scroll down on this page. When you see an `image link' to one of the simulations, I recommend right-clicking it and selecting `Open In New Tab'. That way, you can click back and forth between th ...
Document
... Using IRAM and SCUBA: ~30% of radio-quiet quasars at z>4 detected at 1mm (observed frame) at 1mJy level submm radiation in radio-quiet quasars come from thermal dust with mass ~ 108 Msun • If dust heating came from starburst star formation rate of ...
... Using IRAM and SCUBA: ~30% of radio-quiet quasars at z>4 detected at 1mm (observed frame) at 1mJy level submm radiation in radio-quiet quasars come from thermal dust with mass ~ 108 Msun • If dust heating came from starburst star formation rate of ...
IAC_L2_thindisk
... So far, radial migration is a theoretical concept: we do not know how important it is in reality. It could move metal-rich stars from the inner galaxy out to the outer galaxy, and invert the abundance gradient. z ...
... So far, radial migration is a theoretical concept: we do not know how important it is in reality. It could move metal-rich stars from the inner galaxy out to the outer galaxy, and invert the abundance gradient. z ...
Astronomy 114 - Department of Astronomy
... Interstellar gas and dust are common in the disk of the Galaxy Interstellar medium (ISM) Diffuse gas (atomic H and molecular hydrogen H2 ) Dust (formed in the envelopes of stars) ...
... Interstellar gas and dust are common in the disk of the Galaxy Interstellar medium (ISM) Diffuse gas (atomic H and molecular hydrogen H2 ) Dust (formed in the envelopes of stars) ...
observations of white dwarfs in the solar neighborhood
... within 20 pc of the Sun. Holberg, Oswalt, & Sion (2002) have compiled a list of 109 white dwarfs that lie within 20 pc of the Sun, and they found that the sample is complete to 13 pc and 65% complete to 20 pc. Therefore, 50 white dwarfs remain undiscovered within 20 pc of the Sun. In combining accu ...
... within 20 pc of the Sun. Holberg, Oswalt, & Sion (2002) have compiled a list of 109 white dwarfs that lie within 20 pc of the Sun, and they found that the sample is complete to 13 pc and 65% complete to 20 pc. Therefore, 50 white dwarfs remain undiscovered within 20 pc of the Sun. In combining accu ...
FOE 2017 Poster Contributions - College of Science | Oregon State
... core-collapse of a massive star or from the thermonuclear detonation of a white dwarf, is a central problem of modern astrophysics. For a handful of SNe, we have been able to identify the progenitor from pre-explosion images (e.g., Gerke et al., 2015; Adams et al., 2016); however, for supernova remn ...
... core-collapse of a massive star or from the thermonuclear detonation of a white dwarf, is a central problem of modern astrophysics. For a handful of SNe, we have been able to identify the progenitor from pre-explosion images (e.g., Gerke et al., 2015; Adams et al., 2016); however, for supernova remn ...
The Jansky Very Large Array – New Capabilities, New Science
... •Type III radio bursts from the Sun correspond to thermal electron beams propagating in the low corona. The VLA has imaged these bursts on times scales ~ 100ms. •The beams emanate from an energy release site located in the low corona and propagate along a bundle of discrete magnetic loops upward int ...
... •Type III radio bursts from the Sun correspond to thermal electron beams propagating in the low corona. The VLA has imaged these bursts on times scales ~ 100ms. •The beams emanate from an energy release site located in the low corona and propagate along a bundle of discrete magnetic loops upward int ...
Chapter 5 The Evolutionary Paths Of Nearby Galaxies
... To investigate whether the quenching is due to AGN feedback or environmental effects, I divide the sample according to nuclear activity and Hi content (Figure 5.1, top row, central and right panel, respectively), as described in Chapter 2. For M∗ & 1010 M⊙ , AGN-host spirals are uniformly distribute ...
... To investigate whether the quenching is due to AGN feedback or environmental effects, I divide the sample according to nuclear activity and Hi content (Figure 5.1, top row, central and right panel, respectively), as described in Chapter 2. For M∗ & 1010 M⊙ , AGN-host spirals are uniformly distribute ...
monoceros, the unicorn
... eros) margin reading of Deuteronomy 33:17, but the animal mentioned has only one horn. Every time unicorn is mentioned, the horn is singular, as in Psalm 92:10; if unicorn is plural, then more than one horn is mentioned as in Deuteronomy 33:17 and Psalm 22:21. Why should there be only one horn if th ...
... eros) margin reading of Deuteronomy 33:17, but the animal mentioned has only one horn. Every time unicorn is mentioned, the horn is singular, as in Psalm 92:10; if unicorn is plural, then more than one horn is mentioned as in Deuteronomy 33:17 and Psalm 22:21. Why should there be only one horn if th ...
Teil 2
... 1994, 1996, 1997, 1998 and 2000. These maps indicate a preferred temperature distribution from one year to the other and suggest preferred spot locations for at least the seven years of our observations. Two equatorial active regions appear facing towards and opposite the (unseen) companion star. A ...
... 1994, 1996, 1997, 1998 and 2000. These maps indicate a preferred temperature distribution from one year to the other and suggest preferred spot locations for at least the seven years of our observations. Two equatorial active regions appear facing towards and opposite the (unseen) companion star. A ...
A catalogue of the Chandra Deep Field South with multi
... We needed several observing runs to collect the full 17filter data set. Hence, for some long-term variable stars and QSOs, the observed 17-passband spectral energy distribution (SED) might be skewed. We attempt to ameliorate the colorindependent part of the long-term variability by taking at least R ...
... We needed several observing runs to collect the full 17filter data set. Hence, for some long-term variable stars and QSOs, the observed 17-passband spectral energy distribution (SED) might be skewed. We attempt to ameliorate the colorindependent part of the long-term variability by taking at least R ...
Comparison of Precession Theories: An
... If the only motion of our Sun and the solar system is around the center of the galaxy then NASA is correct, any change in orientation (precession) due to the “geometric effect” would be smaller than current rounding errors. However, if the solar system were moving in any intermediate orbits on its w ...
... If the only motion of our Sun and the solar system is around the center of the galaxy then NASA is correct, any change in orientation (precession) due to the “geometric effect” would be smaller than current rounding errors. However, if the solar system were moving in any intermediate orbits on its w ...
Corvus (constellation)
Corvus is a small constellation in the Southern Celestial Hemisphere. Its name comes from the Latin word ""raven"" or ""crow"". It includes only 11 stars with brighter than 4.02 magnitudes. One of the 48 constellations listed by the 2nd-century astronomer Ptolemy, it remains one of the 88 modern constellations. The four brightest stars, Gamma, Delta, Epsilon, and Beta Corvi from a distinctive quadrilateral in the night sky. The young star Eta Corvi has been found to have two debris disks.