Slide 1
... and 2-color photometry. Tycho-2 catalog– 2.5 million stars. 99% of all stars to V=11. Distances determined to better than 10%- - 21k stars Distances to better than 20%-- 50k stars Two examples of ground all-sky: USNO-B, which you should know and love… 1 billion stars to V=21, 20mas accuracy in astro ...
... and 2-color photometry. Tycho-2 catalog– 2.5 million stars. 99% of all stars to V=11. Distances determined to better than 10%- - 21k stars Distances to better than 20%-- 50k stars Two examples of ground all-sky: USNO-B, which you should know and love… 1 billion stars to V=21, 20mas accuracy in astro ...
Planet formation Abstract Megan K Pickett and Andrew J Lim
... refractory grains into progressively larger bodies. Far from the Sun, where it stayed cool enough for various ices to form, providing additional solid material for planet (core) building, the gas giants were born. Most of the remaining nebular material then dissipated, the thermonuclear fusion of hy ...
... refractory grains into progressively larger bodies. Far from the Sun, where it stayed cool enough for various ices to form, providing additional solid material for planet (core) building, the gas giants were born. Most of the remaining nebular material then dissipated, the thermonuclear fusion of hy ...
Reconciling Dwarf Galaxies with LCDM Cosmology Andrew Wetzel F RE
... −1 within 300 kpc of the centre fiducial choice, an α = 0.18 Eina all resolved haloes with V ...
... −1 within 300 kpc of the centre fiducial choice, an α = 0.18 Eina all resolved haloes with V ...
The electron temperature of the inner halo of the Planetary Nebula
... approximation (ISA) model atmosphere for the hydrogen deficient Wolf Rayet type central star of the planetary nebula (CSPN), and references to selected atomic parameters may be found in Hyung et al. (2000). We adopted the abundances from the core nebula, as described by Hyung et al. (2000). The resu ...
... approximation (ISA) model atmosphere for the hydrogen deficient Wolf Rayet type central star of the planetary nebula (CSPN), and references to selected atomic parameters may be found in Hyung et al. (2000). We adopted the abundances from the core nebula, as described by Hyung et al. (2000). The resu ...
The Milky Way and Andromeda galaxies in a constrained
... whether our simulation predicts the formation of two large spiral galaxies similar to the MW and M 31 and what are the mechanisms determining/affecting their formation. We will show that only the simulated MW has a stable stellar disc that survives to z = 0; while in M 31 various mergers continuously ...
... whether our simulation predicts the formation of two large spiral galaxies similar to the MW and M 31 and what are the mechanisms determining/affecting their formation. We will show that only the simulated MW has a stable stellar disc that survives to z = 0; while in M 31 various mergers continuously ...
IAC_L5_bulge_GALAH
... We can think of a chemical space of abundances of elements Na, Mg, Al, Ca, Mn, Fe, Cu, Zr, Ba, Eu … for example (25 measurable elements with HERMES). The dimensionality of this space is 8 to 9. Most disk stars inhabit a sub-region of this space. Stars from chemically homogeneous aggregates will lie ...
... We can think of a chemical space of abundances of elements Na, Mg, Al, Ca, Mn, Fe, Cu, Zr, Ba, Eu … for example (25 measurable elements with HERMES). The dimensionality of this space is 8 to 9. Most disk stars inhabit a sub-region of this space. Stars from chemically homogeneous aggregates will lie ...
First Stars II
... density; cf. n~1022cm-3 for protostars) Overall evolution is similar to the 1D calculation. The collapse velocity is slower. (why? the effect of rotation, initial condition, turbulence) ...
... density; cf. n~1022cm-3 for protostars) Overall evolution is similar to the 1D calculation. The collapse velocity is slower. (why? the effect of rotation, initial condition, turbulence) ...
ppt
... Since then researches became a little bit pessimistic about the subject. However, with present day abilities and prospects for near future it is important to remember about the possibility to detect such interesting sources. ...
... Since then researches became a little bit pessimistic about the subject. However, with present day abilities and prospects for near future it is important to remember about the possibility to detect such interesting sources. ...
Cosmology and Particle Physics
... example, than closer galaxies, in which case there has been an evolution in time. But the problem is that the uncertainties in our data are great. Cosmology is almost typied by these large uncertainties, so that we must be especially cautious in drawing conclusions. One consequence is that there ar ...
... example, than closer galaxies, in which case there has been an evolution in time. But the problem is that the uncertainties in our data are great. Cosmology is almost typied by these large uncertainties, so that we must be especially cautious in drawing conclusions. One consequence is that there ar ...
Article PDF - IOPscience
... galaxy interactions are especially effective in inducing largescale inflow and flattening metallicity gradients (Rupke et al. 2010; Perez et al. 2011; P. Torrey et al., in preparation). Turbulence associated with the viscous evolution of gas disks can also redistribute metals (Clarke 1989; Sommer-La ...
... galaxy interactions are especially effective in inducing largescale inflow and flattening metallicity gradients (Rupke et al. 2010; Perez et al. 2011; P. Torrey et al., in preparation). Turbulence associated with the viscous evolution of gas disks can also redistribute metals (Clarke 1989; Sommer-La ...
JC Beamín1,2, RA Mendez3,2, RL Smart4, R. Jara3, R
... eighteen previously known high proper motion sources, including precise parallaxes for these sources for the first time. In this pioneer study we show the capability of the VVV project to measure high precision trigonometric parallaxes for very low mass stars (VLMS) up to distances of ~400 pc reachi ...
... eighteen previously known high proper motion sources, including precise parallaxes for these sources for the first time. In this pioneer study we show the capability of the VVV project to measure high precision trigonometric parallaxes for very low mass stars (VLMS) up to distances of ~400 pc reachi ...
question - UW Canvas
... 23. How is it that the core of a massive star is able to fuse heavier and heavier elements without any of these stages resulting in degeneracy or any flashes like the helium flash that occurs in solar-type stars? a. The cores of massive stars are so hot, have such high densities and pressures, that ...
... 23. How is it that the core of a massive star is able to fuse heavier and heavier elements without any of these stages resulting in degeneracy or any flashes like the helium flash that occurs in solar-type stars? a. The cores of massive stars are so hot, have such high densities and pressures, that ...
T Einstein’s Mirage Paul L. Schechter
... Most of the dark matter in galaxies is expected to be smoothly distributed. But roughly 10% is expected to be in clumps (fossils of early generations of cosmic structure), with masses roughly one millionth the mass of a galaxy but still a million times more massive than a star. Such clumps would pro ...
... Most of the dark matter in galaxies is expected to be smoothly distributed. But roughly 10% is expected to be in clumps (fossils of early generations of cosmic structure), with masses roughly one millionth the mass of a galaxy but still a million times more massive than a star. Such clumps would pro ...
Extragalactic Background Light Encyclopedia of Astronomy & Astrophysics eaa.iop.org Rebecca A Bernstein
... free–free continuum emission, and Lyα (1216 Å) and Hα line emission, all from warm (T ∼ 105 K), high-latitude gas. The intensity of these components is proportional to the cosecant of the Galactic latitude, which approximates the path length through smoothly distributed gas. Measurements and limits ...
... free–free continuum emission, and Lyα (1216 Å) and Hα line emission, all from warm (T ∼ 105 K), high-latitude gas. The intensity of these components is proportional to the cosecant of the Galactic latitude, which approximates the path length through smoothly distributed gas. Measurements and limits ...
The interstellar medium and star formation on kpc size scales
... But for those cases, the efficiency factor is multiplied by a factor of 10, which equates to the formation of ∼1 massive star (here, we set specifically that each star formation event corresponds to one massive star). In practice, this is equivalent to saying that only occasionally does an ∼100 M r ...
... But for those cases, the efficiency factor is multiplied by a factor of 10, which equates to the formation of ∼1 massive star (here, we set specifically that each star formation event corresponds to one massive star). In practice, this is equivalent to saying that only occasionally does an ∼100 M r ...
Lyman Alpha Forest
... 1). It is the only direct observational evidence we have of the existence and properties of the general INTERGALACTIC MEDIUM, and, as we have reason to believe, of most of the baryonic matter contents of the universe. On its way to us the light of a bright, distant QSO passes through intervening int ...
... 1). It is the only direct observational evidence we have of the existence and properties of the general INTERGALACTIC MEDIUM, and, as we have reason to believe, of most of the baryonic matter contents of the universe. On its way to us the light of a bright, distant QSO passes through intervening int ...
Document
... • At twice the radius, the outer shell has 7x more volume than the inner shell (23 - 13). • The requirement of uniform average density implies that for large distances there should be 7x as many galaxies within the outer shell inside the same solid angle as the inner shell. • Apparent brightness sca ...
... • At twice the radius, the outer shell has 7x more volume than the inner shell (23 - 13). • The requirement of uniform average density implies that for large distances there should be 7x as many galaxies within the outer shell inside the same solid angle as the inner shell. • Apparent brightness sca ...
The Stellar Population And Origin Of The Mysterious K.V. Getman
... The mysterious high galactic latitude cometary globule (CG) CG12 has been observed with the ACIS detector on board the Chandra X-ray Observatory. We detect 128 X-ray sources, of which a half are likely young stars formed within the globule's head. This new population of >=50 T-Tauri stars and one ne ...
... The mysterious high galactic latitude cometary globule (CG) CG12 has been observed with the ACIS detector on board the Chandra X-ray Observatory. We detect 128 X-ray sources, of which a half are likely young stars formed within the globule's head. This new population of >=50 T-Tauri stars and one ne ...
Far Ultraviolet Spectroscopic Explorer
... Green: 2003 Hubble/ACS H image aligned and smoothed to groundbased resolution. Motion: 1.45” +/-0.3” in 16.3 years. ...
... Green: 2003 Hubble/ACS H image aligned and smoothed to groundbased resolution. Motion: 1.45” +/-0.3” in 16.3 years. ...
GAS KINEMATICS ON GMC SCALES IN M51 WITH PAWS: CLOUD
... Observations of molecular gas at high resolution in nearby spiral galaxies are critical to test the emerging picture of how galactic environment influences the organization, properties and evolutionary pathways of a galaxy’s GMC population, and its global patterns of star formation. In this paper we ...
... Observations of molecular gas at high resolution in nearby spiral galaxies are critical to test the emerging picture of how galactic environment influences the organization, properties and evolutionary pathways of a galaxy’s GMC population, and its global patterns of star formation. In this paper we ...
Mass determinations of PMS stars with the
... • In an 8 years campaign of spectroscopical observations we have discovered 9 PMS SB with period > 50 days that are suitable for observations with AMBER • We already had observations of BS Indi (K=6.6 mag) with AMBER but the signal resulted to be ...
... • In an 8 years campaign of spectroscopical observations we have discovered 9 PMS SB with period > 50 days that are suitable for observations with AMBER • We already had observations of BS Indi (K=6.6 mag) with AMBER but the signal resulted to be ...
Extending the Supermassive Black Hole Mass
... over approximately the same range of M. This result is consistent with both the density wave theory and the manifold theory of spiral structure (e.g., Romero-Gómez et al. 2006), though exploring which theory is to be preferred is beyond the scope of this paper. See the introduction and appendix of B ...
... over approximately the same range of M. This result is consistent with both the density wave theory and the manifold theory of spiral structure (e.g., Romero-Gómez et al. 2006), though exploring which theory is to be preferred is beyond the scope of this paper. See the introduction and appendix of B ...
Far Ultraviolet Spectroscopic Explorer
... Green: 2003 Hubble/ACS H image aligned and smoothed to groundbased resolution. Motion: 1.45” +/-0.3” in 16.3 years. ...
... Green: 2003 Hubble/ACS H image aligned and smoothed to groundbased resolution. Motion: 1.45” +/-0.3” in 16.3 years. ...
Stars, neutral hydrogen and ionised gas in early
... as 5.9×109 M . On the basis of these observations, we included IC 4200 in our sample for the study of the relation between stellar and H i properties in early-type galaxies. We characterised the environment of IC 4200 by looking for extragalactic objects within 100 arcmin (∼1.6 Mpc at this redshift ...
... as 5.9×109 M . On the basis of these observations, we included IC 4200 in our sample for the study of the relation between stellar and H i properties in early-type galaxies. We characterised the environment of IC 4200 by looking for extragalactic objects within 100 arcmin (∼1.6 Mpc at this redshift ...