Galaxy Assembly through Mergers
... My friends have been the backbone of my life, especially in the last few years. Ana and Pedro, my partners in crime, thank you for bearing with me in the most turbulent of times, never leaving my side. I thank you for the care, for the non-sense, for fighting against and with me never scratching our ...
... My friends have been the backbone of my life, especially in the last few years. Ana and Pedro, my partners in crime, thank you for bearing with me in the most turbulent of times, never leaving my side. I thank you for the care, for the non-sense, for fighting against and with me never scratching our ...
The XMM-Newton Bright Serendipitous Survey
... sources is relatively easy given the combination of the good positions of the XMM-Newton sources (90% error ∼400 , Della Ceca et al. 2004) and the brightness of the sources: X-ray sources with FX >10−13 erg cm−2 s−1 are expected to have an optical counterpart brighter than 22 mag for X-ray-to-optica ...
... sources is relatively easy given the combination of the good positions of the XMM-Newton sources (90% error ∼400 , Della Ceca et al. 2004) and the brightness of the sources: X-ray sources with FX >10−13 erg cm−2 s−1 are expected to have an optical counterpart brighter than 22 mag for X-ray-to-optica ...
The correlation between galaxy morphology and star
... 1994; Blanton et al. 2003). In the classical picture, late-type spiral galaxies are active star–forming structures with flattened, gas rich, rotationally supported exponential disks, while early-type galaxies are more luminous, massive and quiescent systems, supported by stellar velocity dispersion ...
... 1994; Blanton et al. 2003). In the classical picture, late-type spiral galaxies are active star–forming structures with flattened, gas rich, rotationally supported exponential disks, while early-type galaxies are more luminous, massive and quiescent systems, supported by stellar velocity dispersion ...
THE 2MASS WIDE-FIELD T DWARF SEARCH. II. DISCOVERY OF
... Survey. These objects, 2MASS 03486022, 2MASS 05160445, and 2MASS 22284310, have classifications T7, T5.5, and T6.5, respectively. Using linear absolute magnitude/spectral type relations derived from T dwarfs with measured parallaxes, we estimate spectrophotometric distances for these discoveries; ...
... Survey. These objects, 2MASS 03486022, 2MASS 05160445, and 2MASS 22284310, have classifications T7, T5.5, and T6.5, respectively. Using linear absolute magnitude/spectral type relations derived from T dwarfs with measured parallaxes, we estimate spectrophotometric distances for these discoveries; ...
The VIMOS Ultra-Deep Survey (VUDS): Fast Increase in the Fraction
... in the local Universe. Hayes et al. (2014) and Atek et al. (2014) have found that Lyα photons escape more easily from galaxies with low dust content. At high redshift, although on samples that are much smaller than the one we use in this paper, a similar trend has been found by Kornei et al. (2010) ...
... in the local Universe. Hayes et al. (2014) and Atek et al. (2014) have found that Lyα photons escape more easily from galaxies with low dust content. At high redshift, although on samples that are much smaller than the one we use in this paper, a similar trend has been found by Kornei et al. (2010) ...
Franz Liszt: An Esoteric Astrological Analysis
... is normally allowed. The contraparallel relationship is similar in effect to that of a planetary opposition, in which two forces oppose each other, and some type of integration or compromise ideally is sought. In addition, this article will investigate the position of certain theoretical planets whi ...
... is normally allowed. The contraparallel relationship is similar in effect to that of a planetary opposition, in which two forces oppose each other, and some type of integration or compromise ideally is sought. In addition, this article will investigate the position of certain theoretical planets whi ...
2012 December Vol. 49 No 584
... whole range of such objects and of considerable variation in difficulty for the visual observer. It was during these observations, which for most of the time I have made many times over the years, that I allowed myself a pause at the telescopes to contemplate those observers in historical times part ...
... whole range of such objects and of considerable variation in difficulty for the visual observer. It was during these observations, which for most of the time I have made many times over the years, that I allowed myself a pause at the telescopes to contemplate those observers in historical times part ...
Development of a Software Package for the Reduction and Analysis
... for the reduction and analysis of meteor videos. The uncertainty in determining the position of a meteor was computed to be 0.2−3.0 pixels, with a median value of 0.3 pixels. Sub-pixel accuracy (0.2−0.5 pixels) was also reached for the uncertainties in the astrometric transformation. Different modul ...
... for the reduction and analysis of meteor videos. The uncertainty in determining the position of a meteor was computed to be 0.2−3.0 pixels, with a median value of 0.3 pixels. Sub-pixel accuracy (0.2−0.5 pixels) was also reached for the uncertainties in the astrometric transformation. Different modul ...
Document
... IR spectra and SEDs (Duchene et al. 2005) 3m Water Ice absorption (Beck et al. 2004) H2 emission morphologies (Brown et al. in prep) YSO Outflow morphologies - two perpendicular outflows, 3 known HH objects associated with T Tau (Solf & Bohm et al. 1999; … outflows Robberto et al. 1995) ...
... IR spectra and SEDs (Duchene et al. 2005) 3m Water Ice absorption (Beck et al. 2004) H2 emission morphologies (Brown et al. in prep) YSO Outflow morphologies - two perpendicular outflows, 3 known HH objects associated with T Tau (Solf & Bohm et al. 1999; … outflows Robberto et al. 1995) ...
Unfolding the Milky Way bulge - International Max Planck Research
... VVV coverage of the Bulge in Galactic coordinates. Each small square shows the coverage by individual 1◦ × 1.5◦ tile from the VVV. Tile numbering for the VVV survey is described in Saito et al. (2012) and the coordinates of the center of each tile are listed in the Appendix B. The different color sh ...
... VVV coverage of the Bulge in Galactic coordinates. Each small square shows the coverage by individual 1◦ × 1.5◦ tile from the VVV. Tile numbering for the VVV survey is described in Saito et al. (2012) and the coordinates of the center of each tile are listed in the Appendix B. The different color sh ...
STARLAB
... Charioteer, Lepus the Hare, Draco, and the Pleiades. Look at these constellations using the Constellation Cylinder. Hand out arrow pointers and show their locations. Look at the Starfield Cylinder and try to locate the same constellations. After leaving STARLAB, hand out star maps, and show the prop ...
... Charioteer, Lepus the Hare, Draco, and the Pleiades. Look at these constellations using the Constellation Cylinder. Hand out arrow pointers and show their locations. Look at the Starfield Cylinder and try to locate the same constellations. After leaving STARLAB, hand out star maps, and show the prop ...
Communications in Asteroseismology
... “Mi-shell Brezhair” in France and Quebec! Mike is a man of many names, but for his more than 35 postgraduate students and many others he is also known as “mentor”, and all of us know him as “friend” and “colleague”. I (DWK) was Mike’s first PhD student at the University of Texas over 30 years ago. Wh ...
... “Mi-shell Brezhair” in France and Quebec! Mike is a man of many names, but for his more than 35 postgraduate students and many others he is also known as “mentor”, and all of us know him as “friend” and “colleague”. I (DWK) was Mike’s first PhD student at the University of Texas over 30 years ago. Wh ...
The Lupus clouds - European Southern Observatory
... position with respect to Lupus that is roughly symmetric with respect to the center of the Upper Scorpius OB group. The scenario of a common origin of both the Ophiuchus and Lupus complexes has been considered by some authors (e.g. Tachihara et al. 2001 and references therein). The possibility and i ...
... position with respect to Lupus that is roughly symmetric with respect to the center of the Upper Scorpius OB group. The scenario of a common origin of both the Ophiuchus and Lupus complexes has been considered by some authors (e.g. Tachihara et al. 2001 and references therein). The possibility and i ...
Niraj D. Welikala Thesis - D-Scholarship@Pitt
... and on these scales the density fluctuations are small in size (rms fluctuations of the order ∼ 0.1 at 1 Gpc). However, on scales of the order of 10 Mpc, the density fluctuations are large (∼ 1). The most apparent overdensities are therefore on small scales, less than 10 Mpc which are the typical sc ...
... and on these scales the density fluctuations are small in size (rms fluctuations of the order ∼ 0.1 at 1 Gpc). However, on scales of the order of 10 Mpc, the density fluctuations are large (∼ 1). The most apparent overdensities are therefore on small scales, less than 10 Mpc which are the typical sc ...
Observational Studies of Interacting Galaxies and the Development
... we worked on together. I have learned a lot from you, including how to conduct observations, reduce data and write papers, etc. Suresh, I owe you a big thank for helping me in instrument developments. I have learned basic optics, experimental techniques and trouble shooting from you. I really enjoye ...
... we worked on together. I have learned a lot from you, including how to conduct observations, reduce data and write papers, etc. Suresh, I owe you a big thank for helping me in instrument developments. I have learned basic optics, experimental techniques and trouble shooting from you. I really enjoye ...
The Day We Found the Universe
... the telescope's mirror was relatively small, it allowed him to estimate that there were tens of thousands of faint nebulae arrayed over the celestial sky, ten times more than had been known before. In the 1910s Lick astronomer Heber Curtis followed up on Keeler's ...
... the telescope's mirror was relatively small, it allowed him to estimate that there were tens of thousands of faint nebulae arrayed over the celestial sky, ten times more than had been known before. In the 1910s Lick astronomer Heber Curtis followed up on Keeler's ...
Galaxy Disks Further
... Galaxy stretches as a magnificent band of light from horizon to horizon, particularly from a dark site at southern latitudes, as in the Astronomy Picture of the Day for January 27, 2009 (Pacholka 2009). Its appearance with the Galactic Center high in the sky is reminiscent of the beautiful edge-on s ...
... Galaxy stretches as a magnificent band of light from horizon to horizon, particularly from a dark site at southern latitudes, as in the Astronomy Picture of the Day for January 27, 2009 (Pacholka 2009). Its appearance with the Galactic Center high in the sky is reminiscent of the beautiful edge-on s ...
Galaxies - hwchemistry
... • At the greatest distances, astronomers must calibrate the total luminosity of the galaxies themselves. – For example, studies of nearby galaxies show that an average galaxy like Milky Way has a luminosity about 16 billion times the sun’s. – If astronomers see a similar galaxy far away, they can me ...
... • At the greatest distances, astronomers must calibrate the total luminosity of the galaxies themselves. – For example, studies of nearby galaxies show that an average galaxy like Milky Way has a luminosity about 16 billion times the sun’s. – If astronomers see a similar galaxy far away, they can me ...
X-ray astronomy of stellar coronae (Review)
... evolution predict that the young Zero-Age Main-Sequence (ZAMS) Sun was fainter by ≈ 25% than at present, stellar X-ray astronomy has revealed that the solar high-energy emission was likely to be hundreds of times more intense at such young ages. The increased level of ionizing and UV radiation must ...
... evolution predict that the young Zero-Age Main-Sequence (ZAMS) Sun was fainter by ≈ 25% than at present, stellar X-ray astronomy has revealed that the solar high-energy emission was likely to be hundreds of times more intense at such young ages. The increased level of ionizing and UV radiation must ...
Probing nuclear activity versus star formation at z ∼ 0.8 using near
... certain extent. On the other hand, the SFRs of deeply buried and optically dull AGN obtained from Hα emission may only have a small contribution from the AGN. These optically dull AGN are defined as X-ray-selected AGN with no evidence for nuclear accretion activity in optical spectroscopy, showing s ...
... certain extent. On the other hand, the SFRs of deeply buried and optically dull AGN obtained from Hα emission may only have a small contribution from the AGN. These optically dull AGN are defined as X-ray-selected AGN with no evidence for nuclear accretion activity in optical spectroscopy, showing s ...
X-Ray Spectroscopy of Stars
... Stars are among the most prominent sources accessible to modern X-ray telescopes. In fact, stars located across almost all regions of a Hertzsprung-Russell diagram have been identified as X-ray sources, with only a few exceptions, most notably A-type stars and the coolest giants of spectral type M. ...
... Stars are among the most prominent sources accessible to modern X-ray telescopes. In fact, stars located across almost all regions of a Hertzsprung-Russell diagram have been identified as X-ray sources, with only a few exceptions, most notably A-type stars and the coolest giants of spectral type M. ...
PDF hosted at the Radboud Repository of the Radboud University
... into the surrounding interstellar medium, little iron survives the explosions. In type Ia supernovae, on the other hand, a large part of the exploding carbon-oxygen object is processed into primarily radioactive nickel which then decays into iron-group elements (iron, cobalt & nickel). Consequently, ...
... into the surrounding interstellar medium, little iron survives the explosions. In type Ia supernovae, on the other hand, a large part of the exploding carbon-oxygen object is processed into primarily radioactive nickel which then decays into iron-group elements (iron, cobalt & nickel). Consequently, ...
Perseus (constellation)
Perseus, named after the Greek mythological hero Perseus, is a constellation in the northern sky. It was one of 48 listed by the 2nd-century astronomer Ptolemy and among the 88 modern constellations defined by the International Astronomical Union (IAU). It is located in the northern celestial hemisphere near several other constellations named after legends surrounding Perseus, including Andromeda to the west and Cassiopeia to the north. Perseus is also bordered by Aries and Taurus to the south, Auriga to the east, Camelopardalis to the north, and Triangulum to the west.The galactic plane of the Milky Way passes through Perseus but is mostly obscured by molecular clouds. The constellation's brightest star is the yellow-white supergiant Alpha Persei (also called Mirfak), which shines at magnitude 1.79. It and many of the surrounding stars are members of an open cluster known as the Alpha Persei Cluster. The best-known star, however, is Algol (Beta Persei), linked with ominous legends because of its variability, which is noticeable to the naked eye. Rather than being an intrinsically variable star, it is an eclipsing binary. Other notable star systems in Perseus include X Persei, a binary system containing a neutron star, and GK Persei, a nova that peaked at magnitude 0.2 in 1901. The Double Cluster, comprising two open clusters quite near each other in the sky, was known to the ancient Chinese. The constellation gives its name to the Perseus Cluster (Abell 426), a massive galaxy cluster located 250 million light-years from Earth. It hosts the radiant of the annual Perseids meteor shower—one of the most prominent meteor showers in the sky.