Galaxy Assembly through Mergers
... moments of joy after a day’s work. I would also like to thank my good friend and composer Daniel for one of the most exquisite experiences that came out of this thesis: a music made from Figure 2.16. Inspiration definitely comes in many forms, shapes and colors. Just like galaxies. The last few year ...
... moments of joy after a day’s work. I would also like to thank my good friend and composer Daniel for one of the most exquisite experiences that came out of this thesis: a music made from Figure 2.16. Inspiration definitely comes in many forms, shapes and colors. Just like galaxies. The last few year ...
The correlation between galaxy morphology and star
... et al. 2010; Cassata et al. 2010). The number density of these galaxies rapidly increases, by a factor of five, from z ∼ 2 to z ∼ 1, and they are up to 5 times more compact in size than local ones with similar mass (Cassata et al. 2011, 2013). Recent works have suggested, however, that a large fract ...
... et al. 2010; Cassata et al. 2010). The number density of these galaxies rapidly increases, by a factor of five, from z ∼ 2 to z ∼ 1, and they are up to 5 times more compact in size than local ones with similar mass (Cassata et al. 2011, 2013). Recent works have suggested, however, that a large fract ...
my dissertation (PhD. Thesis) - Argelander
... of all sizes and distances ranging from our “backyard”, namely the Milky Way itself and the Local Group to galaxies at a redshift of z ' 11 and higher. Each approach can deliver different information and has its advantages and disadvantages. In the following, I briefly describe what can be learned b ...
... of all sizes and distances ranging from our “backyard”, namely the Milky Way itself and the Local Group to galaxies at a redshift of z ' 11 and higher. Each approach can deliver different information and has its advantages and disadvantages. In the following, I briefly describe what can be learned b ...
Niraj D. Welikala Thesis - D-Scholarship@Pitt
... sampling a wide range of properties such as age, star formation rate (SFR), dust obscuration and metallicity. By summing the SFRs in the pixels, I show that, as found in other studies, the distribution of total galaxy SFR shifts to lower values as the local density of surrounding galaxies increases. ...
... sampling a wide range of properties such as age, star formation rate (SFR), dust obscuration and metallicity. By summing the SFRs in the pixels, I show that, as found in other studies, the distribution of total galaxy SFR shifts to lower values as the local density of surrounding galaxies increases. ...
The VIMOS Ultra-Deep Survey (VUDS): Fast Increase in the Fraction
... A lot of effort has been recently put to constrain the correlation between the Lyα properties and the general properties of star–forming galaxies (e.g., dust attenuation, SFR, stellar mass) in the local Universe. Hayes et al. (2014) and Atek et al. (2014) have found that Lyα photons escape more easi ...
... A lot of effort has been recently put to constrain the correlation between the Lyα properties and the general properties of star–forming galaxies (e.g., dust attenuation, SFR, stellar mass) in the local Universe. Hayes et al. (2014) and Atek et al. (2014) have found that Lyα photons escape more easi ...
trimalchio`s astrology - bibliotheca classica petropolitana
... everyday life of the host’s exotic milieu, the narrator’s good eye for detail also serves literary purposes: it lends some traits to Trimalchio’s portrait, stressing his vanity, ignorance, bad manners and bad taste – but at the same time his gaiety, good nature, generosity and a strong, indeed heads ...
... everyday life of the host’s exotic milieu, the narrator’s good eye for detail also serves literary purposes: it lends some traits to Trimalchio’s portrait, stressing his vanity, ignorance, bad manners and bad taste – but at the same time his gaiety, good nature, generosity and a strong, indeed heads ...
An Atlas of Stellar Spectra
... The Atlas of Stellar Spectra and the accompanying outline have been prepared from the viewpoint of the practical stellar astronomer. Problems connected with the astrophysical interpretation of the spectral sequence are not touched on; as a consequence, emphasis is placed on ``ordinary'' stars. These ...
... The Atlas of Stellar Spectra and the accompanying outline have been prepared from the viewpoint of the practical stellar astronomer. Problems connected with the astrophysical interpretation of the spectral sequence are not touched on; as a consequence, emphasis is placed on ``ordinary'' stars. These ...
Understanding Variable Stars - Central Florida Astronomical Society
... Understanding Variable Stars Variable stars are those that change brightness. Their variability may be due to geometric processes such as rotation, or eclipse by a companion star, or physical processes such as vibration, flares, or cataclysmic explosions. In each case, variable stars provide unique ...
... Understanding Variable Stars Variable stars are those that change brightness. Their variability may be due to geometric processes such as rotation, or eclipse by a companion star, or physical processes such as vibration, flares, or cataclysmic explosions. In each case, variable stars provide unique ...
Probing nuclear activity versus star formation at z ∼ 0.8 using near
... starburst, AGN and galaxy templates from Polletta et al. (2007). Based on this SED fitting, we classified them as AGN-dominated (52 per cent) and host galaxy-dominated (48 per cent) objects. The latter have SEDs typical of starburst, spiral or elliptical galaxies, indicating the presence of a deeply ...
... starburst, AGN and galaxy templates from Polletta et al. (2007). Based on this SED fitting, we classified them as AGN-dominated (52 per cent) and host galaxy-dominated (48 per cent) objects. The latter have SEDs typical of starburst, spiral or elliptical galaxies, indicating the presence of a deeply ...
Astronomy Astrophysics
... The VIRCAM (VISTA Infrared CAMera; Dalton et al. 2006) is a 16 detector-array infrared camera that samples 1.65 deg2 . Each 2048 × 2048 detector is sensitive over λ = 0.8–2.5 μm and delivers images with an average pixel scale of 0.34 arcsec px−1 . A single exposure corresponds to a patchy individual ...
... The VIRCAM (VISTA Infrared CAMera; Dalton et al. 2006) is a 16 detector-array infrared camera that samples 1.65 deg2 . Each 2048 × 2048 detector is sensitive over λ = 0.8–2.5 μm and delivers images with an average pixel scale of 0.34 arcsec px−1 . A single exposure corresponds to a patchy individual ...
environmental effects on galaxy evolution in nearby clusters
... objectivity resides in recognizing your preferences and then subjecting them to especially harsh scrutiny ...and also in a willingness to revise or abandon your theories when the tests fail (as they usually do).” Stephen Jay Gould ...
... objectivity resides in recognizing your preferences and then subjecting them to especially harsh scrutiny ...and also in a willingness to revise or abandon your theories when the tests fail (as they usually do).” Stephen Jay Gould ...
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 ...
THE DEMOGRAPHICS OF LONG-PERIOD COMETS ABSTRACT
... were most likely either not real to begin with or fastmoving objects only visible for a short window of time. Secondly, some comets might have been inactive at these large heliocentric distances, and hence classified as minor planets. The minor planet centre database was checked for non-cometary obje ...
... were most likely either not real to begin with or fastmoving objects only visible for a short window of time. Secondly, some comets might have been inactive at these large heliocentric distances, and hence classified as minor planets. The minor planet centre database was checked for non-cometary obje ...
1 Globular Cluster Systems - McMaster Physics and Astronomy
... us far beyond our normal self-centered concerns to a degree that no other eld can do quite as powerfully. Every human generation has found that the world beyond the Earth is a vast and astonishing place. In these chapters, we will be taking an all-too-brief tour through just one small area of moder ...
... us far beyond our normal self-centered concerns to a degree that no other eld can do quite as powerfully. Every human generation has found that the world beyond the Earth is a vast and astonishing place. In these chapters, we will be taking an all-too-brief tour through just one small area of moder ...
The most metal-poor galaxies
... particular the ellipticals) had been formed over a short period during a dynamical free fall time of few 107 years (Eggen et al. 1962) started to be challenged (e.g. Searle and Zinn 1978). It is also during the 70s that the first hierarchical models of galaxy formation were constructed (Press and Sc ...
... particular the ellipticals) had been formed over a short period during a dynamical free fall time of few 107 years (Eggen et al. 1962) started to be challenged (e.g. Searle and Zinn 1978). It is also during the 70s that the first hierarchical models of galaxy formation were constructed (Press and Sc ...
Abstract The Star Formation History of Low Surface Brightness Galaxies
... The star formation histories of low surface brightness galaxies are interesting but poorly constrained. These objects tend to be rather blue, contradicting the initial impression that they may simply be faded remnants of higher surface brightness galaxies whose star formation has finished. Other sce ...
... The star formation histories of low surface brightness galaxies are interesting but poorly constrained. These objects tend to be rather blue, contradicting the initial impression that they may simply be faded remnants of higher surface brightness galaxies whose star formation has finished. Other sce ...
the fixed stars
... any situation for granted as the 'lesser' person (or, in this case, beast) may be the very one to teach us the much needed lesson in humility. Pegasus is also indicative of a specific mission in life which the inquirer will always find the time and energy to pursue, although the path may be sewn wit ...
... any situation for granted as the 'lesser' person (or, in this case, beast) may be the very one to teach us the much needed lesson in humility. Pegasus is also indicative of a specific mission in life which the inquirer will always find the time and energy to pursue, although the path may be sewn wit ...
2. The X-ray-Radio correlation for bulgeless galaxies
... Fig. 20: The bulgeless galaxies detected in the X-ray band by the C-COSMOS survey. The continuous line represents the luminosity detection limit for the survey in respect to the redshift. The dashed line represents the limit above which galaxies are considered AGN................................... ...
... Fig. 20: The bulgeless galaxies detected in the X-ray band by the C-COSMOS survey. The continuous line represents the luminosity detection limit for the survey in respect to the redshift. The dashed line represents the limit above which galaxies are considered AGN................................... ...
Mapping the Pathways of Galaxy Transformation Across Time and
... outcomes from the IMACS Cluster-Building Survey: our finding that most z∼0.5 poststarbursts are rejuvenated passive galaxies, and a simple model positing that every galaxy has a lognormal SFH whose parameters are set at birth. Both studies reinterpreted key metrics of galaxy evolution typically seen ...
... outcomes from the IMACS Cluster-Building Survey: our finding that most z∼0.5 poststarbursts are rejuvenated passive galaxies, and a simple model positing that every galaxy has a lognormal SFH whose parameters are set at birth. Both studies reinterpreted key metrics of galaxy evolution typically seen ...
Preliminary Talk Abstract Book - MoCA
... lower stellar mass haloes. These evolutionary trends are dominated by red galaxies, and are consistent with a model in which the stellar mass above which star formation is quenched “downsizes” with cosmic time. In contrast, the SHMR of blue, star-forming galaxies is well fit by a power law that does ...
... lower stellar mass haloes. These evolutionary trends are dominated by red galaxies, and are consistent with a model in which the stellar mass above which star formation is quenched “downsizes” with cosmic time. In contrast, the SHMR of blue, star-forming galaxies is well fit by a power law that does ...
THE UV-OPTICAL COLOR MAGNITUDE DIAGRAM. II. PHYSICAL
... understand the characteristics of the dominant galaxy population, including the slope of the sequence itself. Some of this analysis is quite complementary to the work of S07. We also focus on the distribution disk-dominated and bulge-dominated galaxies across the full range of SFR /M? and M? , and i ...
... understand the characteristics of the dominant galaxy population, including the slope of the sequence itself. Some of this analysis is quite complementary to the work of S07. We also focus on the distribution disk-dominated and bulge-dominated galaxies across the full range of SFR /M? and M? , and i ...
THE STAR FORMATION AND NUCLEAR ACCRETION HISTORIES OF NORMAL GALAXIES
... targeted based on a simple R-band flux-limited criterion. Redshifts were measured using two independent data reduction pipelines (the Hectospec pipeline at the CfA and a modified SDSS pipeline at Steward Observatory), and the results were verified by visually inspecting the spectra for features cons ...
... targeted based on a simple R-band flux-limited criterion. Redshifts were measured using two independent data reduction pipelines (the Hectospec pipeline at the CfA and a modified SDSS pipeline at Steward Observatory), and the results were verified by visually inspecting the spectra for features cons ...
Luminosity profiles and sizes of massive star clusters in NGC 7252
... remnant NGC 7252. In particular, we focus on the surface brightness profiles and effective radii Reff of 36 young massive clusters (YMCs) within the galaxy. All the clusters have masses exceeding 105 M and are, despite the 64 Mpc distance to the galaxy, (partly) resolved on the HST images. Effectiv ...
... remnant NGC 7252. In particular, we focus on the surface brightness profiles and effective radii Reff of 36 young massive clusters (YMCs) within the galaxy. All the clusters have masses exceeding 105 M and are, despite the 64 Mpc distance to the galaxy, (partly) resolved on the HST images. Effectiv ...
Galaxies - hwchemistry
... distant galaxy, astronomers rush to observe it. – Studies show that type Ia supernovae—caused by the collapse of a white dwarf—all reach about the same absolute magnitude at maximum. – By searching for Cepheids and other distance indicators in nearby galaxies where type Ia supernovae have occurred, ...
... distant galaxy, astronomers rush to observe it. – Studies show that type Ia supernovae—caused by the collapse of a white dwarf—all reach about the same absolute magnitude at maximum. – By searching for Cepheids and other distance indicators in nearby galaxies where type Ia supernovae have occurred, ...
Aries (constellation)
Aries is one of the constellations of the zodiac. It is located in the northern celestial hemisphere between Pisces to the west and Taurus to the east. The name Aries is Latin for ram, and its symbol is 20px (Unicode ♈), representing a ram's horns. It is one of the 48 constellations described by the 2nd century astronomer Ptolemy, and remains one of the 88 modern constellations. It is a mid-sized constellation, ranking 39th overall size, with an area of 441 square degrees (1.1% of the celestial sphere).Although Aries came to represent specifically the ram whose fleece became the Golden Fleece of Ancient Greek mythology, it has represented a ram since late Babylonian times. Before that, the stars of Aries formed a farmhand. Different cultures have incorporated the stars of Aries into different constellations including twin inspectors in China and a porpoise in the Marshall Islands. Aries is a relatively dim constellation, possessing only four bright stars: Hamal (Alpha Arietis, second magnitude), Sheratan (Beta Arietis, third magnitude), Mesarthim (Gamma Arietis, fourth magnitude), and 41 Arietis (also fourth magnitude). The few deep-sky objects within the constellation are quite faint and include several pairs of interacting galaxies. Several meteor showers appear to radiate from Aries, including the Daytime Arietids and the Epsilon Arietids.