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PPT
... The only possibility left to solve the age discrepancy is to consider larger values of the metallicity, since isochrones with an enhanced metallicity have a fainter main sequence turn-off and, consequently, would result in a lower cluster turn-off age. ...
... The only possibility left to solve the age discrepancy is to consider larger values of the metallicity, since isochrones with an enhanced metallicity have a fainter main sequence turn-off and, consequently, would result in a lower cluster turn-off age. ...
The 0.5-2.22µm Scattered Light Spectrum of the Disk Around TW
... 2006). The TW Hya stars may not be coeval, and TW Hya could even be at the young end of their age distribution (Weinberger et al. 2013). Associations just a bit older than TW Hya, such as β Pic, have no optically thick, massive protoplanetary disks. Despite reservations about its representativeness, ...
... 2006). The TW Hya stars may not be coeval, and TW Hya could even be at the young end of their age distribution (Weinberger et al. 2013). Associations just a bit older than TW Hya, such as β Pic, have no optically thick, massive protoplanetary disks. Despite reservations about its representativeness, ...
Full-Text PDF
... Abstract: The geometrical structures and photophysical properties of Ir(4,6-dFppy)2 (pic) (FIrpic) and its derivative (o-FIr, m-FIr, p-FIr) with dimethylamine substituted at the picolinic acid (N∧ O) ligand were fully investigated by density functional theory and time-dependent density functional th ...
... Abstract: The geometrical structures and photophysical properties of Ir(4,6-dFppy)2 (pic) (FIrpic) and its derivative (o-FIr, m-FIr, p-FIr) with dimethylamine substituted at the picolinic acid (N∧ O) ligand were fully investigated by density functional theory and time-dependent density functional th ...
compaq - Sloan Digital Sky Survey
... How much dark matter is there? Local census of the galaxy population: How did galaxies form? Find the most distant objects in the Universe: What are the highest quasar redshifts? ...
... How much dark matter is there? Local census of the galaxy population: How did galaxies form? Find the most distant objects in the Universe: What are the highest quasar redshifts? ...
The Nuclear Equation of State and Neutron Star Masses
... by Universita degli Studi di Roma La Sapienza on 04/07/14. For personal use only. ...
... by Universita degli Studi di Roma La Sapienza on 04/07/14. For personal use only. ...
Origin and Evolution of the Abundance Gradient along the Milky
... be described by an exponential law, in which the infall time scale is always assumed to be radially dependent τ = τ (r), with a smaller value in the inner region and a much larger one in the outer disk (Chang et al. 1999; Boissier & Prantzos 1999; Hou et al. 2000; Chiappini et al. 2001). On the othe ...
... be described by an exponential law, in which the infall time scale is always assumed to be radially dependent τ = τ (r), with a smaller value in the inner region and a much larger one in the outer disk (Chang et al. 1999; Boissier & Prantzos 1999; Hou et al. 2000; Chiappini et al. 2001). On the othe ...
Measuring the orbital periods of low mass X-ray binaries in the X
... Compact objects, including white dwarfs, neutron stars and black holes, are the endings of stellar evolution, and play important roles in the stellar life cycle. An X-ray binary contains either a neutron star or a black hole accreting material from a companion star and emits strong X-rays from the r ...
... Compact objects, including white dwarfs, neutron stars and black holes, are the endings of stellar evolution, and play important roles in the stellar life cycle. An X-ray binary contains either a neutron star or a black hole accreting material from a companion star and emits strong X-rays from the r ...
Local Universe Supernovae and Their Host Galaxies
... Catania Observatory (Italy): M. Turatto CNR-IRA (Italy): F. Mannucci IAP (Paris, France): D. Kunth, G. Mamon INAF-OAC (Italy): M. Della Valle Padova Observatory (Italy): E. Cappellaro, H. Navasardyan, STScI: R. Allen, C. Leitherer, J. MacKenty, B. McLean, N. Panagia ...
... Catania Observatory (Italy): M. Turatto CNR-IRA (Italy): F. Mannucci IAP (Paris, France): D. Kunth, G. Mamon INAF-OAC (Italy): M. Della Valle Padova Observatory (Italy): E. Cappellaro, H. Navasardyan, STScI: R. Allen, C. Leitherer, J. MacKenty, B. McLean, N. Panagia ...
Astrophysics of Dust in Cold Clouds
... Thus if |m − 1| ≈ 1 at λ = 0.1 µm, < .015 µm. • we must have large numbers of grains with a ∼ ...
... Thus if |m − 1| ≈ 1 at λ = 0.1 µm, < .015 µm. • we must have large numbers of grains with a ∼ ...
The Milky Way and the Cosmic Soma
... The key to the meaning of the signs of the zodiac should be evident from the orientation of the zodiac itself. The most dramatic factor in stellar observation for any person is the Milky Way. The meaning of the signs of the zodiac, if stellar based, should be centered on their relationship to the Mi ...
... The key to the meaning of the signs of the zodiac should be evident from the orientation of the zodiac itself. The most dramatic factor in stellar observation for any person is the Milky Way. The meaning of the signs of the zodiac, if stellar based, should be centered on their relationship to the Mi ...
Galaxy Formation and Evolution.
... The rapidly expanding field of galaxy formation lies at the interfaces of astronomy, particle physics, and cosmology. Covering diverse topics from these disciplines, all of which are needed to understand how galaxies form and evolve, this book is ideal for researchers entering the field. Individual ...
... The rapidly expanding field of galaxy formation lies at the interfaces of astronomy, particle physics, and cosmology. Covering diverse topics from these disciplines, all of which are needed to understand how galaxies form and evolve, this book is ideal for researchers entering the field. Individual ...
(NH3)n and NH2 - Sanov Group
... lowest binding energy transition (peaking at 0.77 eV) is assigned to removal of an electron from the b1 HOMO of NH2 − to generate the neutral amidogen radical in its 2 B1 ground state, as previously identified.30, 39 The narrow width of this transition (labeled 2 B1 in Figure 3) and lack of vibratio ...
... lowest binding energy transition (peaking at 0.77 eV) is assigned to removal of an electron from the b1 HOMO of NH2 − to generate the neutral amidogen radical in its 2 B1 ground state, as previously identified.30, 39 The narrow width of this transition (labeled 2 B1 in Figure 3) and lack of vibratio ...
The drop in the cosmic star formation rate below redshift 2 is caused
... to identify gravitationally bound haloes and subhaloes. In this work we only investigate accretion onto haloes that are not embedded inside larger haloes. In other words, we do not consider subhaloes. The simulations are saved at discrete output redshifts, called snapshots. The redshift intervals be ...
... to identify gravitationally bound haloes and subhaloes. In this work we only investigate accretion onto haloes that are not embedded inside larger haloes. In other words, we do not consider subhaloes. The simulations are saved at discrete output redshifts, called snapshots. The redshift intervals be ...
Design considerations for a high temperature image sensor
... spheres of constant radius are packed close together, within a plan, they organize themselves creating a hexagonal pattern. The cause of this type of packaging is due to the covalent bond of the atoms that make up the basic cell, which means that each silicon atom is surrounded by exactly four carbo ...
... spheres of constant radius are packed close together, within a plan, they organize themselves creating a hexagonal pattern. The cause of this type of packaging is due to the covalent bond of the atoms that make up the basic cell, which means that each silicon atom is surrounded by exactly four carbo ...
cmc by uv 2
... micellar charge, then λmic = αNaggλSD and eq 2 becomes eq 3: κ = (λNa + λSD) CMC(1 – α) + (λNa + λSD)α[SDS] t = κo + m2 [SDS]t ...
... micellar charge, then λmic = αNaggλSD and eq 2 becomes eq 3: κ = (λNa + λSD) CMC(1 – α) + (λNa + λSD)α[SDS] t = κo + m2 [SDS]t ...
A Pluto-like radius and a high albedo for the
... The dwarf planet Eris is a trans-Neptunian object with an orbital eccentricity of 0.44, an inclination of 44 degrees and a surface composition very similar to that of Pluto1. It resides at present at 95.7 astronomical units (1 AU is the Earth-Sun distance) from Earth, near its aphelion and more than ...
... The dwarf planet Eris is a trans-Neptunian object with an orbital eccentricity of 0.44, an inclination of 44 degrees and a surface composition very similar to that of Pluto1. It resides at present at 95.7 astronomical units (1 AU is the Earth-Sun distance) from Earth, near its aphelion and more than ...
PDF - American Chemical Society
... be attributed to an adsorbed species. Ferricyanide and ferrocyanide bands at 2115 and 2040 cm-1, respectively, increase or decrease in intensity with changing electrode potential but do not shift; i.e., they behave in a manner that is characteristic of solution species. In contrast, the intense broa ...
... be attributed to an adsorbed species. Ferricyanide and ferrocyanide bands at 2115 and 2040 cm-1, respectively, increase or decrease in intensity with changing electrode potential but do not shift; i.e., they behave in a manner that is characteristic of solution species. In contrast, the intense broa ...
Why are most molecular clouds not gravitationally bound
... The calculations presented here are 3D smoothed particle hydrodynamics (SPH) simulations using an SPH code developed by Benz (Benz et al. 1990), Bate (Bate, Bonnell & Price 1995) and Price (Price & Monaghan 2007). The code uses a variable smoothing length, such that the density ρ and smoothing lengt ...
... The calculations presented here are 3D smoothed particle hydrodynamics (SPH) simulations using an SPH code developed by Benz (Benz et al. 1990), Bate (Bate, Bonnell & Price 1995) and Price (Price & Monaghan 2007). The code uses a variable smoothing length, such that the density ρ and smoothing lengt ...
The debris disc - UvA-DARE
... τ Ceti is a nearby, mature G-type star very similar to our Sun, with a massive Kuiper Belt analogue and possible multiplanet system that has been compared to our Solar system. We present Herschel Space Observatory images of the debris disc, finding the disc is resolved at 70 µm and 160 µm, and margi ...
... τ Ceti is a nearby, mature G-type star very similar to our Sun, with a massive Kuiper Belt analogue and possible multiplanet system that has been compared to our Solar system. We present Herschel Space Observatory images of the debris disc, finding the disc is resolved at 70 µm and 160 µm, and margi ...
Construction of a 408 nm Laser System for Use in Ion Interferometry
... through space. The output of the interferometer will give information about the relative phase shift acquired by the ions as they travel along each of the arms of the interferometer. ...
... through space. The output of the interferometer will give information about the relative phase shift acquired by the ions as they travel along each of the arms of the interferometer. ...
Astronomical spectroscopy
![](https://commons.wikimedia.org/wiki/Special:FilePath/Star-Spectroscope.jpg?width=300)
Astronomical spectroscopy is the study of astronomy using the techniques of spectroscopy to measure the spectrum of electromagnetic radiation, including visible light, which radiates from stars and other hot celestial objects. Spectroscopy can be used to derive many properties of distant stars and galaxies, such as their chemical composition, temperature, density, mass, distance, luminosity, and relative motion using Doppler shift measurements.