3D Tour of the Universe Template
... entire Galactic disk. The halo is filled with old, faint stars and globular clusters. The stars in the halo and inside globular clusters are metal-poor, older stars that formed close to the era of our galaxy's formation. But for our purposes, you can think of it as roughly demarcating a sphere of gr ...
... entire Galactic disk. The halo is filled with old, faint stars and globular clusters. The stars in the halo and inside globular clusters are metal-poor, older stars that formed close to the era of our galaxy's formation. But for our purposes, you can think of it as roughly demarcating a sphere of gr ...
STRUCTURAL CHARACTERISTICS AND STELLAR
... A few galaxies such as UGC 12695 have very bright H II regions. These may skew the luminosity weighted colors towards those of the H II regions. These can have peculiar colors because of the complex, rapidly evolving population of massive stars (Campbell & Terlevich 1984, McGaugh 1991), and because ...
... A few galaxies such as UGC 12695 have very bright H II regions. These may skew the luminosity weighted colors towards those of the H II regions. These can have peculiar colors because of the complex, rapidly evolving population of massive stars (Campbell & Terlevich 1984, McGaugh 1991), and because ...
Open clusters in the Third Galactic Quadrant III. Alleged binary
... groups at different distances: Haffner 18(1) at 4.5 kpc and Haffner 18(2) between 9.5 and 11.4 kpc from the Sun. The derived distances and ages have been used to situate the clusters in the Galactic context. In particular, young stellar groups trace spiral structure at large Galactocentric radii. At le ...
... groups at different distances: Haffner 18(1) at 4.5 kpc and Haffner 18(2) between 9.5 and 11.4 kpc from the Sun. The derived distances and ages have been used to situate the clusters in the Galactic context. In particular, young stellar groups trace spiral structure at large Galactocentric radii. At le ...
SN Ia host galaxy properties and the dust extinction
... SN Ia are the mainstay of cosmological distance measurements. The photometric properties of their light curves are very stable but appear to depend slightly on host galaxy properties (e.g. star formation rate or stellar mass). With this mind, the third incarnation of the Sloan Digital Sky Survey (SD ...
... SN Ia are the mainstay of cosmological distance measurements. The photometric properties of their light curves are very stable but appear to depend slightly on host galaxy properties (e.g. star formation rate or stellar mass). With this mind, the third incarnation of the Sloan Digital Sky Survey (SD ...
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... intense, highly variable He emission, X-ray emission implies the presence of an unseen binary companion. Conclusions. S18 provides observational support for the putative physical association of (a subset of) sgB[e] stars and luminous blue variables. Given the nature of the circumstellar environme ...
... intense, highly variable He emission, X-ray emission implies the presence of an unseen binary companion. Conclusions. S18 provides observational support for the putative physical association of (a subset of) sgB[e] stars and luminous blue variables. Given the nature of the circumstellar environme ...
Solaria Binaria - The Grazian Archive
... Stars can be conceived to have originated from electrical cavities in the structure of space. Space, to our mind, is an infinite electrical medium. It is electrical in that it is everywhere occupied by a charge, which, when it moves, assumes the character of electrons, that is, “negative” charge (se ...
... Stars can be conceived to have originated from electrical cavities in the structure of space. Space, to our mind, is an infinite electrical medium. It is electrical in that it is everywhere occupied by a charge, which, when it moves, assumes the character of electrons, that is, “negative” charge (se ...
The asymmetric nuclear region of M83 and its off
... contrast to the Br γ emission, the [FeII] emission, tracing shocks from supernova remnants, is distributed in a large number of small and compact clumps and we show that these each correspond to one or at most a few supernova remnants. In contrast to Br γ , [FeII] is dominated by diffuse emission (7 ...
... contrast to the Br γ emission, the [FeII] emission, tracing shocks from supernova remnants, is distributed in a large number of small and compact clumps and we show that these each correspond to one or at most a few supernova remnants. In contrast to Br γ , [FeII] is dominated by diffuse emission (7 ...
My Favorite Universe
... his series of lectures discusses 12 topics based on 12 hand-picked essays out of 100 or so written for Natural History magazine since 1995. Although they do not follow a particular curriculum, they nonetheless represent the professor’s favorite cosmic subjects. And, not surprisingly, they represent ...
... his series of lectures discusses 12 topics based on 12 hand-picked essays out of 100 or so written for Natural History magazine since 1995. Although they do not follow a particular curriculum, they nonetheless represent the professor’s favorite cosmic subjects. And, not surprisingly, they represent ...
ABSTRACT XMM-Newton X-Ray Spectroscopy of the B2 Bright Giant
... lines, we combined several Gaussians with a bremsstrahlung. We loosely confined the range of temperatures allowed for the bremsstrahlung, but allowed the bremsstrahlung model to vary from fit to fit because it is generally so weak that we could not determine its specific characteristics. The paramet ...
... lines, we combined several Gaussians with a bremsstrahlung. We loosely confined the range of temperatures allowed for the bremsstrahlung, but allowed the bremsstrahlung model to vary from fit to fit because it is generally so weak that we could not determine its specific characteristics. The paramet ...
TAKS objective 5 Earth and Space Systems
... The Sun is a Star Our sun is a medium-size yellow star. It is 4.6 billion years old. In the sun, hydrogen undergoes nuclear fusion, a process that releases vast amounts of energy. During fusion hydrogen atoms join to form helium atoms. Hydrogen fusion is the source of light, heat, and other radiati ...
... The Sun is a Star Our sun is a medium-size yellow star. It is 4.6 billion years old. In the sun, hydrogen undergoes nuclear fusion, a process that releases vast amounts of energy. During fusion hydrogen atoms join to form helium atoms. Hydrogen fusion is the source of light, heat, and other radiati ...
Chap 16: Galaxies
... Q: The first question of our mid-term exam tells us that the farthest star can be seen by naked eyes should be 5167 light years away. Why are we able to see Andromeda galaxy (M31) which is about 2.54 million light years away without aid when the night sky is clear? A: Surely we can’t see a star whic ...
... Q: The first question of our mid-term exam tells us that the farthest star can be seen by naked eyes should be 5167 light years away. Why are we able to see Andromeda galaxy (M31) which is about 2.54 million light years away without aid when the night sky is clear? A: Surely we can’t see a star whic ...
JET FORMATION FROM MASSIVE YOUNG STARS
... 2005; Dullemond & Monnier 2010). However, to probe regions 100 AU around a young high-mass star is difficult due to the large degree of extinction. We therefore studied this region via semi-analytic modeling in a previous paper (Vaidya et al. 2009) to understand the physical properties of such disk ...
... 2005; Dullemond & Monnier 2010). However, to probe regions 100 AU around a young high-mass star is difficult due to the large degree of extinction. We therefore studied this region via semi-analytic modeling in a previous paper (Vaidya et al. 2009) to understand the physical properties of such disk ...
Merger of binary neutron stars with realistic equations of state in full
... prescription (see Sec. II B). On the other hand, realistic equations of state are assigned to the cold part [19–21]. The motivation which stimulates us to perform new simulations is that the stiffness and adiabatic index of the realistic equations of state are quite different from those in the -law ...
... prescription (see Sec. II B). On the other hand, realistic equations of state are assigned to the cold part [19–21]. The motivation which stimulates us to perform new simulations is that the stiffness and adiabatic index of the realistic equations of state are quite different from those in the -law ...
The Disk-Jet Connection
... IV. Disks and outflows during gravitational collapse MHD simulations of collapsing, magnetized B-E spheres (FLASH AMR MHD code) (Misaligned B and rotation axis rapidly align Matsumoto & Tomisaka 2004) ...
... IV. Disks and outflows during gravitational collapse MHD simulations of collapsing, magnetized B-E spheres (FLASH AMR MHD code) (Misaligned B and rotation axis rapidly align Matsumoto & Tomisaka 2004) ...
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.