The correlation between galaxy morphology and star
... & Rocca-Volmerange 1997), as well as the available sample of 152 spectroscopic redshifts (about 4% of our final sample) as a training set. In the redshift range considered here the CANDELS photometric redshifts are of good quality, as verified by comparing them against available spectroscopic ones. ...
... & Rocca-Volmerange 1997), as well as the available sample of 152 spectroscopic redshifts (about 4% of our final sample) as a training set. In the redshift range considered here the CANDELS photometric redshifts are of good quality, as verified by comparing them against available spectroscopic ones. ...
The VIMOS Ultra-Deep Survey (VUDS): Fast Increase in the Fraction
... 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 easily from galaxies with low dust content. At high redshift, although on samples that are much smaller than the one we use in t ...
... 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 easily from galaxies with low dust content. At high redshift, although on samples that are much smaller than the one we use in t ...
Evolution of galaxy morphology - Lecture 1 - NCRA-TIFR
... M/L defined in units of M /L For galaxies, M/L reflects the average M/L over the population Pop I (young) : massive stars dominate light; low mass stars dominate mass Pop II (old) : giants dominate light; M.S. stars dominate mass Typical galaxy (& solar neighborhood) has M/LV 6, M/LB ∼ 10 In gener ...
... M/L defined in units of M /L For galaxies, M/L reflects the average M/L over the population Pop I (young) : massive stars dominate light; low mass stars dominate mass Pop II (old) : giants dominate light; M.S. stars dominate mass Typical galaxy (& solar neighborhood) has M/LV 6, M/LB ∼ 10 In gener ...
A catalogue of the Chandra Deep Field South with multi
... Fig. 1. COMBO-17 filter set: Total system efficiencies in the COMBO-17 bands. They include two telescope mirrors, the WFI instrument, CCD detector and an average La Silla atmosphere. Photometric calibrations of such datasets are best achieved with spectrophotometric standards inside the target field ...
... Fig. 1. COMBO-17 filter set: Total system efficiencies in the COMBO-17 bands. They include two telescope mirrors, the WFI instrument, CCD detector and an average La Silla atmosphere. Photometric calibrations of such datasets are best achieved with spectrophotometric standards inside the target field ...
Super-solar Metal Abundances in Two Galaxies at ζ ∼ 3.57
... GRB 090323 was detected and localized by the Gammaray Burst Monitor (GBM) and the Large Area Telescope (LAT) onboard NASA’s Fermi Gamma-ray Space Telescope (Michelson et al. 2008) on 23 March UT (Ohno et al. 2009). Observations by Swift’s X-ray Telescope (XRT; Kennea et al. 2009) lead to the discove ...
... GRB 090323 was detected and localized by the Gammaray Burst Monitor (GBM) and the Large Area Telescope (LAT) onboard NASA’s Fermi Gamma-ray Space Telescope (Michelson et al. 2008) on 23 March UT (Ohno et al. 2009). Observations by Swift’s X-ray Telescope (XRT; Kennea et al. 2009) lead to the discove ...
Introduction to Cosmology - Experimental Elementary Particle
... of our Galaxy is not known as accurately as the mass of the Sun; in round numbers, though, it is Mgal ≈ 1012 M¯ . The Sun, incidentally, also provides the standard unit of power used in astronomy. The Sun’s luminosity (that is, the rate at which it radiates away energy in the form of light) is 1 L¯ ...
... of our Galaxy is not known as accurately as the mass of the Sun; in round numbers, though, it is Mgal ≈ 1012 M¯ . The Sun, incidentally, also provides the standard unit of power used in astronomy. The Sun’s luminosity (that is, the rate at which it radiates away energy in the form of light) is 1 L¯ ...
Measuring distances to the edge of the local group
... Richard Fisher in 1977 in their seminal paper suggesting the relationship as a means of calibrating distance measurements. Since then, it has been observed that for medium mass galaxies (rotational velocities between 90kms-1 and 200 kms-1), the relation was very linear. When very high and low mass g ...
... Richard Fisher in 1977 in their seminal paper suggesting the relationship as a means of calibrating distance measurements. Since then, it has been observed that for medium mass galaxies (rotational velocities between 90kms-1 and 200 kms-1), the relation was very linear. When very high and low mass g ...
Chapter 24
... Seen through even a small telescope, images of galaxies look distinctly nonstellar. They have fuzzy edges, and many are quite elongated—not at all like the sharp, pointlike images normally associated with stars. Although it is difficult to tell from the photograph, some of the blobs of light in Figu ...
... Seen through even a small telescope, images of galaxies look distinctly nonstellar. They have fuzzy edges, and many are quite elongated—not at all like the sharp, pointlike images normally associated with stars. Although it is difficult to tell from the photograph, some of the blobs of light in Figu ...
Article PDF - IOPscience
... galaxies come in several types such that the relationship between bulge and disk light may not be as simple as these model fitting techniques assume. It is also not clear that bulges are well fitted by the de Vaucouleurs profile, with significant evidence that they are not (Andredakis & Sanders 1994; Ma ...
... galaxies come in several types such that the relationship between bulge and disk light may not be as simple as these model fitting techniques assume. It is also not clear that bulges are well fitted by the de Vaucouleurs profile, with significant evidence that they are not (Andredakis & Sanders 1994; Ma ...
A Zoo of Galaxies - Cambridge University Press
... of a galaxy, more than just an image is required – we also need an estimate of its distance in order to reveal its size and mass. Hubble is most famous for a discovery which revolutionised extragalactic astronomy in its ability to provide a relatively quick and easy way to make these distance estima ...
... of a galaxy, more than just an image is required – we also need an estimate of its distance in order to reveal its size and mass. Hubble is most famous for a discovery which revolutionised extragalactic astronomy in its ability to provide a relatively quick and easy way to make these distance estima ...
A new view of galaxy evolution
... find in the local universe, but are that essentially disappear using just the brightest few that are there. a filter just a bit bluer. This is the These galaxies are very bright and thus traditional way to find distant galaxies easy to see because they are undergoing intense and is being used today ...
... find in the local universe, but are that essentially disappear using just the brightest few that are there. a filter just a bit bluer. This is the These galaxies are very bright and thus traditional way to find distant galaxies easy to see because they are undergoing intense and is being used today ...
Wandering in the Redshift Desert
... COSMOS pBzKs (and along with them a much larger number of star-forming galaxies in the desert) would take about a quarter of the time we have estimated above for FORS2, i.e., some 350 VLT nights. This still looks like a lot of time, yet is somewhat more affordable than a mere FORS2 brute force effor ...
... COSMOS pBzKs (and along with them a much larger number of star-forming galaxies in the desert) would take about a quarter of the time we have estimated above for FORS2, i.e., some 350 VLT nights. This still looks like a lot of time, yet is somewhat more affordable than a mere FORS2 brute force effor ...
The Cosmos & the Bible
... – Light from objects that look thousands of lightyears away must have made many circuits and taken thousands of years to do so. ...
... – Light from objects that look thousands of lightyears away must have made many circuits and taken thousands of years to do so. ...
EROs and submm galaxies: Expectations for FMOS in the
... been resolved into submillimetre galaxies (SMGs) which appear to be dusty vigorous star-forming galaxies. Half the total extragalactic background is in the submm, while SMGs make up more than half the extragalactic submm background >25% of all stars since the Big Bang have formed in SMGs. ...
... been resolved into submillimetre galaxies (SMGs) which appear to be dusty vigorous star-forming galaxies. Half the total extragalactic background is in the submm, while SMGs make up more than half the extragalactic submm background >25% of all stars since the Big Bang have formed in SMGs. ...
Module 11.1.1: Galaxies: Morphology and the Hubble Sequence
... S0's, which are galaxies that obviously had a disk but he couldn't see any spiral arms. Here's Sombrero galaxy, one of the famous examples. And indeed physically they are transitional in th ...
... S0's, which are galaxies that obviously had a disk but he couldn't see any spiral arms. Here's Sombrero galaxy, one of the famous examples. And indeed physically they are transitional in th ...
A Zoo of Galaxies
... to classify it, then make categories. Much of the early effort in the field of extragalactic astronomy went into classifying the types of galaxies seen in the sky. Probably the most famous of the early galaxy classifiers was Edwin Hubble (18891953). He was not the only person at the time to develop ...
... to classify it, then make categories. Much of the early effort in the field of extragalactic astronomy went into classifying the types of galaxies seen in the sky. Probably the most famous of the early galaxy classifiers was Edwin Hubble (18891953). He was not the only person at the time to develop ...
A Zoo of Galaxies - Portsmouth Research Portal
... to classify it, then make categories. Much of the early effort in the field of extragalactic astronomy went into classifying the types of galaxies seen in the sky. Probably the most famous of the early galaxy classifiers was Edwin Hubble (18891953). He was not the only person at the time to develop ...
... to classify it, then make categories. Much of the early effort in the field of extragalactic astronomy went into classifying the types of galaxies seen in the sky. Probably the most famous of the early galaxy classifiers was Edwin Hubble (18891953). He was not the only person at the time to develop ...
The Milky Way - The Independent School
... luminosities Compare to apparent magnitudes Find its distances Both are “Standard-candle” methods: Know absolute magnitude (luminosity) compare to apparent magnitude find distance ...
... luminosities Compare to apparent magnitudes Find its distances Both are “Standard-candle” methods: Know absolute magnitude (luminosity) compare to apparent magnitude find distance ...
3. Cosmology and the Origin and Evolution of Galaxies
... devoted to studies of the formation and evolution of structure at highredshift, described in this chapter, are thus entirely consistent with this important strategic report from the CAA. Moreover, these important scientific questions are uniquely relevant, for the reasons described below, to astronom ...
... devoted to studies of the formation and evolution of structure at highredshift, described in this chapter, are thus entirely consistent with this important strategic report from the CAA. Moreover, these important scientific questions are uniquely relevant, for the reasons described below, to astronom ...
THE MORPHOLOGICAL DEMOGRAPHICS OF GALAXIES IN THE
... The archeological nature of galaxy evolution studies prevents us from following individual galaxies over time. In consequence we are only left with snapshots at different lookback times from where we attempt, as excavators, to piece together their evolutionary histories from the motion of different ...
... The archeological nature of galaxy evolution studies prevents us from following individual galaxies over time. In consequence we are only left with snapshots at different lookback times from where we attempt, as excavators, to piece together their evolutionary histories from the motion of different ...
Chap 16: Galaxies
... luminosities Compare to apparent magnitudes Find its distances Both are “Standard-candle” methods: Know absolute magnitude (luminosity) compare to apparent magnitude find distance. ...
... luminosities Compare to apparent magnitudes Find its distances Both are “Standard-candle” methods: Know absolute magnitude (luminosity) compare to apparent magnitude find distance. ...
Cold galaxies at low and high z
... Andromeda and our other neighbours in the Local Group into a single large and dying galaxy there will be no other galaxies within our observable horizon ...
... Andromeda and our other neighbours in the Local Group into a single large and dying galaxy there will be no other galaxies within our observable horizon ...
The quest for the size of the universe in early relativistic cosmology
... either observations of stars, or assumptions on the mean density of matter, or velocities of globular clusters and spiral nebulæ in order to determine the value of R. Indeed the study of distant galaxies during the Twenties marked a turning point in the empirical approach to cosmology. In this conte ...
... either observations of stars, or assumptions on the mean density of matter, or velocities of globular clusters and spiral nebulæ in order to determine the value of R. Indeed the study of distant galaxies during the Twenties marked a turning point in the empirical approach to cosmology. In this conte ...