Masses, Radii, and Equation of State of Neutron Stars
... Our understanding of neutron stars has changed drastically since the Annual Reviews article of Wheeler (1966), when not a single neutron star was known and the discussion consisted of an entirely theoretical treatment of collapsed dense stars. The change has been most rapid in the last decade, when ...
... Our understanding of neutron stars has changed drastically since the Annual Reviews article of Wheeler (1966), when not a single neutron star was known and the discussion consisted of an entirely theoretical treatment of collapsed dense stars. The change has been most rapid in the last decade, when ...
The Herschel Orion Protostar Survey: Luminosity and Envelope
... collapse model. These models predict a small range of luminosities due to the formation of a range of stellar masses, and these luminosities are large compared to those typically observed. For Class I protostars, the model luminosities are of order 10 L⊙ , while the observed ones are generally < 3 L ...
... collapse model. These models predict a small range of luminosities due to the formation of a range of stellar masses, and these luminosities are large compared to those typically observed. For Class I protostars, the model luminosities are of order 10 L⊙ , while the observed ones are generally < 3 L ...
Today Only, A New Exhibit: M,L, and T Dwarfs!
... of our Sun's mass Burns Deuterium at >~ 13 Jupiter Masses for ~ 10’s of Myrs heating from contraction Highly convective Hot Corona may disappear around 2770 K i.e. LP 944-20 ...
... of our Sun's mass Burns Deuterium at >~ 13 Jupiter Masses for ~ 10’s of Myrs heating from contraction Highly convective Hot Corona may disappear around 2770 K i.e. LP 944-20 ...
CPW
... Correct Answer: C • RaAonale: This is a rare science quesAon on which you are required to use a bit of outside knowledge. • The last sentence of Student 2’s second paragraph states that Alg ...
... Correct Answer: C • RaAonale: This is a rare science quesAon on which you are required to use a bit of outside knowledge. • The last sentence of Student 2’s second paragraph states that Alg ...
Final Exam Review
... matter This matter collapses onto itself, extinguishing the star and resulting in the black hole b. very massive stars when their core nuclear fuel has essentially expired, resulting in the core collapsing in on itself. This is due to gravitational forces that act without nuclear fusion counteractin ...
... matter This matter collapses onto itself, extinguishing the star and resulting in the black hole b. very massive stars when their core nuclear fuel has essentially expired, resulting in the core collapsing in on itself. This is due to gravitational forces that act without nuclear fusion counteractin ...
Evolution of the Milky Way with radial motions of stars and gas
... for radial migration than transient recurring spirals, namely resonance overlap of the bar and spiral structure (Sygnet et al. 1988). This strongly nonlinear coupling leads to a more efficient redistribution of angular momentum in the disk and produces a stellar velocity dispersion that increases with ...
... for radial migration than transient recurring spirals, namely resonance overlap of the bar and spiral structure (Sygnet et al. 1988). This strongly nonlinear coupling leads to a more efficient redistribution of angular momentum in the disk and produces a stellar velocity dispersion that increases with ...
Annual Report 2011 - Max Planck Institute for Astrophysics
... the same architect as ESO headquarters, and the two buildings are generally considered as important and highly original examples of the architecture of their period. Although the unconventional geometry of the MPA can easily confuse first-time visitors, its open and centrally focused plan is very ef ...
... the same architect as ESO headquarters, and the two buildings are generally considered as important and highly original examples of the architecture of their period. Although the unconventional geometry of the MPA can easily confuse first-time visitors, its open and centrally focused plan is very ef ...
The chemical composition of IK Pegasi
... progenitor during this common envelope phase. This, however, is purely speculative, since the abundance anomalies may be explained by radiative diffusion processes operating in the atmosphere of IK Peg A, even though it is undergoing smallamplitude pulsations. It is suggested that IK Peg A is a hot ...
... progenitor during this common envelope phase. This, however, is purely speculative, since the abundance anomalies may be explained by radiative diffusion processes operating in the atmosphere of IK Peg A, even though it is undergoing smallamplitude pulsations. It is suggested that IK Peg A is a hot ...
The Nuclear Equation of State and Neutron Star Masses
... At the same time, ongoing laboratory measurements of nuclear properties and theoretical studies of pure neutron matter are limiting the properties of neutron star matter near the saturation density (usually expressed as baryon density, ns 0.16 baryons fm−3 ; mass density, ρs 2.7 × 1014 g cm−3 ; ...
... At the same time, ongoing laboratory measurements of nuclear properties and theoretical studies of pure neutron matter are limiting the properties of neutron star matter near the saturation density (usually expressed as baryon density, ns 0.16 baryons fm−3 ; mass density, ρs 2.7 × 1014 g cm−3 ; ...
Chemical abundances of metal-poor RR Lyrae stars in the Magellanic Clouds
... of the MW halo should have come from the early progenitors of MC-like galaxies. In galaxies that experienced star formation throughout cosmic history, the identification of purely old populations is difficult. For instance, the abundant red giants can cover an age range of more than ten Gyr. Thus on ...
... of the MW halo should have come from the early progenitors of MC-like galaxies. In galaxies that experienced star formation throughout cosmic history, the identification of purely old populations is difficult. For instance, the abundant red giants can cover an age range of more than ten Gyr. Thus on ...
sections 23-25 powerpoint
... Lenticular galaxies get their name because they are “lenslike,” but are more like spiral and barred spiral galaxies in possessing a flattened disk, rather than like elliptical galaxies which mostly possess ellipsoidal symmetry. The distinguishing feature of lenticulars is that they do not have spir ...
... Lenticular galaxies get their name because they are “lenslike,” but are more like spiral and barred spiral galaxies in possessing a flattened disk, rather than like elliptical galaxies which mostly possess ellipsoidal symmetry. The distinguishing feature of lenticulars is that they do not have spir ...
doctoral thesis (Dissertation)
... outflows. Shocks within these jets can heat the matter to X-ray emitting temperatures. The first is already well characterised; for the latter two scenarios models are presented in this thesis. The accretion shock is treated in a stationary 1D model, taking non-equilibrium ionisations explicitly int ...
... outflows. Shocks within these jets can heat the matter to X-ray emitting temperatures. The first is already well characterised; for the latter two scenarios models are presented in this thesis. The accretion shock is treated in a stationary 1D model, taking non-equilibrium ionisations explicitly int ...
First Results from the WISE Enhanced Resolution Galaxy Atlas
... plexity and sustainability of converting gas into stars. Comprising the local universe, nearby galaxies represent a fossil record of galaxy evolution, the boundary condition for cosmological models that explain past and current state of the universe. Although galaxies come in all shapes, sizes, mass ...
... plexity and sustainability of converting gas into stars. Comprising the local universe, nearby galaxies represent a fossil record of galaxy evolution, the boundary condition for cosmological models that explain past and current state of the universe. Although galaxies come in all shapes, sizes, mass ...
- StealthSkater
... recent studies of stellar evolution) that slowly rotating stars like the Sun rotate slowly because they have planets. Apparently the formation of a planetary system robs the star of much of its rotational momentum. For two reasons, then, we eliminate stars of class 'F4' and above: (1) most of them r ...
... recent studies of stellar evolution) that slowly rotating stars like the Sun rotate slowly because they have planets. Apparently the formation of a planetary system robs the star of much of its rotational momentum. For two reasons, then, we eliminate stars of class 'F4' and above: (1) most of them r ...
elt science case
... are required to test and fully calibrate this correlation. Clearly the extension of the sample in the coming years will also extend the present GRB redshift limit to higher values. This will offer the unprecedented opportunity to investigate the nature of dark energy beyond what can be reached by SN ...
... are required to test and fully calibrate this correlation. Clearly the extension of the sample in the coming years will also extend the present GRB redshift limit to higher values. This will offer the unprecedented opportunity to investigate the nature of dark energy beyond what can be reached by SN ...
The XXL Survey - XIII. Baryon content of the bright cluster sample
... for 80−90% of the baryons at this mass scale (e.g. Arnaud & Evrard 1999; Ettori 2003; Vikhlinin et al. 2006; Pratt et al. 2009). The observed gas fraction is generally found to increase with radius because of non-gravitational energy input (Allen et al. 2004; Vikhlinin et al. 2006; Eckert et al. 201 ...
... for 80−90% of the baryons at this mass scale (e.g. Arnaud & Evrard 1999; Ettori 2003; Vikhlinin et al. 2006; Pratt et al. 2009). The observed gas fraction is generally found to increase with radius because of non-gravitational energy input (Allen et al. 2004; Vikhlinin et al. 2006; Eckert et al. 201 ...
Star formation
Star formation is the process by which dense regions within molecular clouds in interstellar space, sometimes referred to as ""stellar nurseries"" or ""star-forming regions"", collapse to form stars. As a branch of astronomy, star formation includes the study of the interstellar medium (ISM) and giant molecular clouds (GMC) as precursors to the star formation process, and the study of protostars and young stellar objects as its immediate products. It is closely related to planet formation, another branch of astronomy. Star formation theory, as well as accounting for the formation of a single star, must also account for the statistics of binary stars and the initial mass function.In June 2015, astronomers reported evidence for Population III stars in the Cosmos Redshift 7 galaxy at z = 6.60. Such stars are likely to have existed in the very early universe (i.e., at high redshift), and may have started the production of chemical elements heavier than hydrogen that are needed for the later formation of planets and life as we know it.