Gas fraction and star formation efficiency at z \< 1.0⋆⋆⋆⋆⋆⋆
... 2008). The average molecular gas density can be traced by the CO excitation, measured from line ratios of the CO ladder (e.g. Weiss et al. 2007). Another intervening factor is an external dynamical trigger of star formation, such as galaxy interactions or accretion by cold gas. Both effects are expec ...
... 2008). The average molecular gas density can be traced by the CO excitation, measured from line ratios of the CO ladder (e.g. Weiss et al. 2007). Another intervening factor is an external dynamical trigger of star formation, such as galaxy interactions or accretion by cold gas. Both effects are expec ...
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. ...
exploring fundamental physics with neutron stars
... relativistic processes of particle acceleration and pair cascades which emit collimated beams of radiation. This is a fascinating and active field of research which applies radiation and plasma physics to the extreme conditions found in neutron star magnetospheres. Like for all stars, neutron star m ...
... relativistic processes of particle acceleration and pair cascades which emit collimated beams of radiation. This is a fascinating and active field of research which applies radiation and plasma physics to the extreme conditions found in neutron star magnetospheres. Like for all stars, neutron star m ...
EXPLORING FUNDAMENTAL PHYSICS WITH NEUTRON STARS
... relativistic processes of particle acceleration and pair cascades which emit collimated beams of radiation. This is a fascinating and active field of research which applies radiation and plasma physics to the extreme conditions found in neutron star magnetospheres. Like for all stars, neutron star m ...
... relativistic processes of particle acceleration and pair cascades which emit collimated beams of radiation. This is a fascinating and active field of research which applies radiation and plasma physics to the extreme conditions found in neutron star magnetospheres. Like for all stars, neutron star m ...
Gas fraction and star formation efficiency at z< 1.0
... Fig. 1. Redshift histogram of the presented sample (see Table 1) at redshifts between 0.6 < z < 1.0. The sources have been selected based on their 60 µm flux from IRAS, or 70 µm flux from Spitzer-MIPS. The open histogram indicates COundetected sources, while the filled histogram shows detections. 12 ...
... Fig. 1. Redshift histogram of the presented sample (see Table 1) at redshifts between 0.6 < z < 1.0. The sources have been selected based on their 60 µm flux from IRAS, or 70 µm flux from Spitzer-MIPS. The open histogram indicates COundetected sources, while the filled histogram shows detections. 12 ...
astronomy (astr)
... Internal dynamics and structure of galaxies; physics of star formation, active galactic nuclei, and galaxy interactions; large-scale clustering and environment-dependent physical processes; evolution of the galaxy population over cosmic time. Requisites: Prerequisites, ASTR 301, MATH 383, and PHYS 3 ...
... Internal dynamics and structure of galaxies; physics of star formation, active galactic nuclei, and galaxy interactions; large-scale clustering and environment-dependent physical processes; evolution of the galaxy population over cosmic time. Requisites: Prerequisites, ASTR 301, MATH 383, and PHYS 3 ...
1 The Hubble Story (10:56)
... The details revealed by Hubble are superior to anything seen to date with groundbased instruments and, thanks to Hubble, we have visual proof today that dusty disks around young stars are common. With ground-based telescopes the gas giant planet HD 209458b, 150 light-years from Earth, was discovered ...
... The details revealed by Hubble are superior to anything seen to date with groundbased instruments and, thanks to Hubble, we have visual proof today that dusty disks around young stars are common. With ground-based telescopes the gas giant planet HD 209458b, 150 light-years from Earth, was discovered ...
STELLAR AGE VERSUS MASS OF EARLY
... realistic population – with a finite duration of star formation rather than a delta-peak – can never become so red, since not all of its stars reach this period at the same time. Indeed, the model population that formed from a single burst of finite length lies within the observed color range, altho ...
... realistic population – with a finite duration of star formation rather than a delta-peak – can never become so red, since not all of its stars reach this period at the same time. Indeed, the model population that formed from a single burst of finite length lies within the observed color range, altho ...
Next Generation VLA Science White Paper
... forefront facilities. In very bright regions and through heroic efforts at lower resolution these diagnostics have been applied and explored, but their use as a general purpose tool remained limited by these simple sensitivity concerns. This changes with ALMA, but in the ν = 70–115 GHz range perhaps ...
... forefront facilities. In very bright regions and through heroic efforts at lower resolution these diagnostics have been applied and explored, but their use as a general purpose tool remained limited by these simple sensitivity concerns. This changes with ALMA, but in the ν = 70–115 GHz range perhaps ...
Clouds and Chemistry in the Atmosphere of Extrasolar Planet
... smooth near-IR spectrum. Strong water absorption is detected, indicating a Hydrogen-rich atmosphere. Only weak CH4 absorption is detected at K band, indicating efficient vertical mixing and a disequilibrium CO/CH4 ratio at photospheric depths. The H-band spectrum has a distinct triangular shape cons ...
... smooth near-IR spectrum. Strong water absorption is detected, indicating a Hydrogen-rich atmosphere. Only weak CH4 absorption is detected at K band, indicating efficient vertical mixing and a disequilibrium CO/CH4 ratio at photospheric depths. The H-band spectrum has a distinct triangular shape cons ...
FOE 2017 Poster Contributions - College of Science | Oregon State
... Tibshirani 1986). GAM allows to represent the relationship as the sum of smooth functions including very few predictors and to identify these components of the model which can be reduced to the linear form. According to our preliminary results, for the considered sample size of 116 GRBs the model pr ...
... Tibshirani 1986). GAM allows to represent the relationship as the sum of smooth functions including very few predictors and to identify these components of the model which can be reduced to the linear form. According to our preliminary results, for the considered sample size of 116 GRBs the model pr ...
The new Basel high-latitude field star survey of the Galaxy
... Abstract. We discuss star count and three-color data for the two inner-Galaxy fields SA 107 and NGC 6171 observed in the new Basel RGU high-latitude field star survey. Our analysis is based on the structural models of the Galactic population components that were derived from the previous studies of ...
... Abstract. We discuss star count and three-color data for the two inner-Galaxy fields SA 107 and NGC 6171 observed in the new Basel RGU high-latitude field star survey. Our analysis is based on the structural models of the Galactic population components that were derived from the previous studies of ...
Six thousand versus 14 Billion: How large and how old is the
... of a human hair! You would not be able to notice this shift with your bare eye (let alone hit a bullseye that small). Such a measurement is very difficult to do and no wonder it took until the 19th century to actually detect a parallax shift reliably. In fact, it still is hard today, but appare ...
... of a human hair! You would not be able to notice this shift with your bare eye (let alone hit a bullseye that small). Such a measurement is very difficult to do and no wonder it took until the 19th century to actually detect a parallax shift reliably. In fact, it still is hard today, but appare ...
On the nature of the stellar-mass black-hole candidate X
... process, using a simplified formula. In this case there are a lot of soft photons from the disk, with a lower energy than the electrons in the hot plasma. This means that the high-energetic electrons can give some of their energy to the soft photons. The processes are a bit different for the hard st ...
... process, using a simplified formula. In this case there are a lot of soft photons from the disk, with a lower energy than the electrons in the hot plasma. This means that the high-energetic electrons can give some of their energy to the soft photons. The processes are a bit different for the hard st ...
A Brief History of Time
... stars, distributed more or less uniformly over infinite space, this would not happen, because there would not be any central point for them to fall to. This argument is an instance of the pitfalls that you can encounter in talking about infinity. In an infinite universe, every point can be regarded ...
... stars, distributed more or less uniformly over infinite space, this would not happen, because there would not be any central point for them to fall to. This argument is an instance of the pitfalls that you can encounter in talking about infinity. In an infinite universe, every point can be regarded ...
PHY 375 - DePaul University
... We will use the full relativistic Doppler effect formula to avoid faster than light recession velocity (but see posted lecture notes about why this step angers theoreticians, especially because faster than light motions are not a problem in general relativity; in fact, the preference is to keep dist ...
... We will use the full relativistic Doppler effect formula to avoid faster than light recession velocity (but see posted lecture notes about why this step angers theoreticians, especially because faster than light motions are not a problem in general relativity; in fact, the preference is to keep dist ...
View the pdf here
... but it is dedicated to von humboldt. he contrasts the positions of aristotle, bacon, hume, kant, bentham, and mill, for example. he quotes them. it is a defense of imagination, intuition, and improvisation in all the paths of human inquiry, including the sciences, and it is a reasoned defense by a c ...
... but it is dedicated to von humboldt. he contrasts the positions of aristotle, bacon, hume, kant, bentham, and mill, for example. he quotes them. it is a defense of imagination, intuition, and improvisation in all the paths of human inquiry, including the sciences, and it is a reasoned defense by a c ...
Building galaxies Hunt, Leslie Kipp
... that atomic gas mass fraction also varies along the Hubble sequence. On the other hand, the massto-light ratio measured in the B band remains relatively constant with morphology, even toward the very late spiral types (although see Burstein 1982). With data from Roberts & Haynes (1994), Figure 3 sho ...
... that atomic gas mass fraction also varies along the Hubble sequence. On the other hand, the massto-light ratio measured in the B band remains relatively constant with morphology, even toward the very late spiral types (although see Burstein 1982). With data from Roberts & Haynes (1994), Figure 3 sho ...
Lambda-CDM model
The ΛCDM (Lambda cold dark matter) or Lambda-CDM model is a parametrization of the Big Bang cosmological model in which the universe contains a cosmological constant, denoted by Lambda (Greek Λ), associated with dark energy, and cold dark matter (abbreviated CDM). It is frequently referred to as the standard model of Big Bang cosmology, because it is the simplest model that provides a reasonably good account of the following properties of the cosmos: the existence and structure of the cosmic microwave background the large-scale structure in the distribution of galaxies the abundances of hydrogen (including deuterium), helium, and lithium the accelerating expansion of the universe observed in the light from distant galaxies and supernovaeThe model assumes that general relativity is the correct theory of gravity on cosmological scales.It emerged in the late 1990s as a concordance cosmology, after a period of time when disparate observed properties of the universe appeared mutually inconsistent, and there was no consensus on the makeup of the energy density of the universe.The ΛCDM model can be extended by adding cosmological inflation, quintessence and other elements that are current areas of speculation and research in cosmology.Some alternative models challenge the assumptions of the ΛCDM model. Examples of these are modified Newtonian dynamics, modified gravity and theories of large-scale variations in the matter density of the universe.