Determination of the distance to the Andromeda Galaxy using variable stars U
... are rare. However, in the less luminous low mass dM stars optical flares often occur. It is also known, that red dwarfs from ≈ 0.3M down to the hydrogen burning limit can release a considerable amount of energy via flare eruptions, even when, in most cases, these objects show very low magnetic acti ...
... are rare. However, in the less luminous low mass dM stars optical flares often occur. It is also known, that red dwarfs from ≈ 0.3M down to the hydrogen burning limit can release a considerable amount of energy via flare eruptions, even when, in most cases, these objects show very low magnetic acti ...
Supernovae and Gamma-Ray Bursts (draft)
... likely ejected by the progenitor in the not-too-distant past, that was flashionized by the first light from the supernova. This is not necessarily related to a particular explosion type; it just implies a particular mass-loss history of the progenitor. In a more extreme version, there may be so much ...
... likely ejected by the progenitor in the not-too-distant past, that was flashionized by the first light from the supernova. This is not necessarily related to a particular explosion type; it just implies a particular mass-loss history of the progenitor. In a more extreme version, there may be so much ...
Classification of Variable Stars
... V1668 Cyg. These are stars in constellations for which all of the letter combinations have been exhausted. (i.e. V746 Oph is the 746th variable to be discovered in Ophiuchus.) Variable star names are determined by a committee appointed by the International Astronomical Union (I.A.U.). The assignment ...
... V1668 Cyg. These are stars in constellations for which all of the letter combinations have been exhausted. (i.e. V746 Oph is the 746th variable to be discovered in Ophiuchus.) Variable star names are determined by a committee appointed by the International Astronomical Union (I.A.U.). The assignment ...
The physics of star formation
... Stars are the fundamental units of luminous matter in the universe, and they are responsible, directly or indirectly, for most of what we see when we observe it. They also serve as our primary tracers of the structure and evolution of the universe and its contents. Consequently, it is of central imp ...
... Stars are the fundamental units of luminous matter in the universe, and they are responsible, directly or indirectly, for most of what we see when we observe it. They also serve as our primary tracers of the structure and evolution of the universe and its contents. Consequently, it is of central imp ...
High precision effective temperatures for 181 F-
... for giants with an error of only 33 K. So far however the line-ratio method has not been fully utilized for the purposes other than just temperature estimation by itself. One of few applications is the chemical abundance analysis of supergiants, where it has proved the anticipated high efficiency an ...
... for giants with an error of only 33 K. So far however the line-ratio method has not been fully utilized for the purposes other than just temperature estimation by itself. One of few applications is the chemical abundance analysis of supergiants, where it has proved the anticipated high efficiency an ...
The physics of star formation - Yale Astronomy
... Stars are the fundamental units of luminous matter in the universe, and they are responsible, directly or indirectly, for most of what we see when we observe it. They also serve as our primary tracers of the structure and evolution of the universe and its contents. Consequently, it is of central imp ...
... Stars are the fundamental units of luminous matter in the universe, and they are responsible, directly or indirectly, for most of what we see when we observe it. They also serve as our primary tracers of the structure and evolution of the universe and its contents. Consequently, it is of central imp ...
Theoretical Predictions for Mass Loss Rates: Rotation & Pulsation
... Rotation & Pulsation in Theoretical Predictions of Mass Loss from Luminous Stars ...
... Rotation & Pulsation in Theoretical Predictions of Mass Loss from Luminous Stars ...
Development of Iodine Cells for the Subaru HDS and the Okayama
... from our observations, since it is required to have high resolution and a high S/N ratio and not to contain any systematic errors. Thus, we have developed a new method to reconstruct a pure stellar spectrum from star + I2 spectra. Details of this method are described in subsection 2.2. For modeling ...
... from our observations, since it is required to have high resolution and a high S/N ratio and not to contain any systematic errors. Thus, we have developed a new method to reconstruct a pure stellar spectrum from star + I2 spectra. Details of this method are described in subsection 2.2. For modeling ...
Survey of Astrophysics A110 The Milky Way Galaxy
... • Clusters of Stars • A star cluster refers to a region in space in which there is a large concentration of stars. • Two types of clusters: – 1. Open Clusters (sometimes called Galactic Clusters). – 2. Globular Clusters. ...
... • Clusters of Stars • A star cluster refers to a region in space in which there is a large concentration of stars. • Two types of clusters: – 1. Open Clusters (sometimes called Galactic Clusters). – 2. Globular Clusters. ...
Untitled
... story. According to many experts along with Hawking, if there is a scientific census of the rest of the Milky Way and beyond, the odds in favor of extra-terrestrial life's existence would rise dramatically. With all the speculations and the possibilities, what the extra-terrestrial life-form might a ...
... story. According to many experts along with Hawking, if there is a scientific census of the rest of the Milky Way and beyond, the odds in favor of extra-terrestrial life's existence would rise dramatically. With all the speculations and the possibilities, what the extra-terrestrial life-form might a ...
Astronomical Telescope for New York – A Proposal
... approximately five years from build start. The total cost of the telescope, inclusive of 25% contingency and two instruments is estimated at $105M, including ~$30M set aside for the two first light instruments. We estimate that operating costs will run ~$10 million/year. Considerable advances in tec ...
... approximately five years from build start. The total cost of the telescope, inclusive of 25% contingency and two instruments is estimated at $105M, including ~$30M set aside for the two first light instruments. We estimate that operating costs will run ~$10 million/year. Considerable advances in tec ...
Why is the Sun very dense on the inside?
... a) Yes, because Earth would quickly freeze over. b) Yes, because Earth would no longer be bound to the solar system and would drift into space. c) Yes, because the Sun would collapse and the planets would soon follow. d) No, it takes thousands of years for photons created in nuclear reactions at ...
... a) Yes, because Earth would quickly freeze over. b) Yes, because Earth would no longer be bound to the solar system and would drift into space. c) Yes, because the Sun would collapse and the planets would soon follow. d) No, it takes thousands of years for photons created in nuclear reactions at ...
The Danish 1.5 m Telescope in Operation!
... The optical characteristics of the telescope make it especially suitable for direct observations with photographic as weil as more advanced detectors. For sufficiently accurate guiding of long exposures an automatic guiding system is essential, particularly because the asymmetric mounting of our tel ...
... The optical characteristics of the telescope make it especially suitable for direct observations with photographic as weil as more advanced detectors. For sufficiently accurate guiding of long exposures an automatic guiding system is essential, particularly because the asymmetric mounting of our tel ...
Proficiency Step #5--
... We tend to think of constellations as a group of related stars that form a pattern, when in fact, most of the constellations consist of stars that are not related—that is, they are varying distances from Earth and their relative positions are simply a coincidence. It might be convenient to note her ...
... We tend to think of constellations as a group of related stars that form a pattern, when in fact, most of the constellations consist of stars that are not related—that is, they are varying distances from Earth and their relative positions are simply a coincidence. It might be convenient to note her ...
November News Letter - Boise Astronomical Society
... stars below and right of the moon. However, above Orion’s body is his raised arm and club. The moon is located on top of his club and Orion is about to bat the moon with his club. Be sure to look for the horizontal row of three stars located in the middle of the rectangle of Orion’s body; this is Or ...
... stars below and right of the moon. However, above Orion’s body is his raised arm and club. The moon is located on top of his club and Orion is about to bat the moon with his club. Be sure to look for the horizontal row of three stars located in the middle of the rectangle of Orion’s body; this is Or ...
Galactic Nebulae
... Distance of 5000 light years and about 15 light years in diameter Omega Nebula represents over 800 solar masses of material Largest HII region – molecular cloud complex in inner part Of galaxy and one of closest to sun Cascade of star formation within M17 – open star cluster NGC6618 – obscured by ga ...
... Distance of 5000 light years and about 15 light years in diameter Omega Nebula represents over 800 solar masses of material Largest HII region – molecular cloud complex in inner part Of galaxy and one of closest to sun Cascade of star formation within M17 – open star cluster NGC6618 – obscured by ga ...
A Variability Study of the Typical Red Supergiant Antares A
... the exception of the bright M-class supergiant Betelgeuse (α Orionis, M2 Iab). Betelgeuse has been well studied both observationally and theoretically, and has many features that are well described by models of convection. It was these studies of Betelgeuse that provided the main motivation for this ...
... the exception of the bright M-class supergiant Betelgeuse (α Orionis, M2 Iab). Betelgeuse has been well studied both observationally and theoretically, and has many features that are well described by models of convection. It was these studies of Betelgeuse that provided the main motivation for this ...
Tycho Brahe
... • Constructed a 5 foot diameter globe where he would accurately fix the positions of all the stars from his observations. • 1000 stars ...
... • Constructed a 5 foot diameter globe where he would accurately fix the positions of all the stars from his observations. • 1000 stars ...
Word
... common in the universe. We can find many real examples when we look up into the sky. Using computers, we are able to build up a model demonstrating the collision between galaxies. We will begin with a brief introduction of colliding galaxies and then show how we have been able to simulate them using ...
... common in the universe. We can find many real examples when we look up into the sky. Using computers, we are able to build up a model demonstrating the collision between galaxies. We will begin with a brief introduction of colliding galaxies and then show how we have been able to simulate them using ...
Galaxies
... common in the universe. We can find many real examples when we look up into the sky. Using computers, we are able to build up a model demonstrating the collision between galaxies. We will begin with a brief introduction of colliding galaxies and then show how we have been able to simulate them using ...
... common in the universe. We can find many real examples when we look up into the sky. Using computers, we are able to build up a model demonstrating the collision between galaxies. We will begin with a brief introduction of colliding galaxies and then show how we have been able to simulate them using ...
How we think the planets were born
... The Geminids can be annually observed in the first half of December, with its peak activity being around December 14. The shower owes its name to the constellation Gemini from where the meteors appear to emerge from in the sky (the so-called “radiant”). Unlike most other meteor showers, the Geminids ...
... The Geminids can be annually observed in the first half of December, with its peak activity being around December 14. The shower owes its name to the constellation Gemini from where the meteors appear to emerge from in the sky (the so-called “radiant”). Unlike most other meteor showers, the Geminids ...
The chemical enrichment of the ICM from hydrodynamical simulations
... A number of authors have presented hydrodynamical simulations for the formation of cosmic structures, which include treatments of the chemical evolution at different levels of complexity. Raiteri et al. (1996) presented SPH simulations of the Galaxy, forming in an isolated halo, by following iron an ...
... A number of authors have presented hydrodynamical simulations for the formation of cosmic structures, which include treatments of the chemical evolution at different levels of complexity. Raiteri et al. (1996) presented SPH simulations of the Galaxy, forming in an isolated halo, by following iron an ...
X-Ray Properties of Young Stars and Stellar Clusters
... be modeled as a two-temperature plasma with one component Tcool = 10 MK and the other component Thot = 30 MK. These temperatures are much higher than the quiescent solar corona. The concept of “microflaring” or “nanoflaring” for the Sun has been widely discussed (Parker, 1988) and has gained favor i ...
... be modeled as a two-temperature plasma with one component Tcool = 10 MK and the other component Thot = 30 MK. These temperatures are much higher than the quiescent solar corona. The concept of “microflaring” or “nanoflaring” for the Sun has been widely discussed (Parker, 1988) and has gained favor i ...
The Milky Way disk
... Abstract / This review summarises the invited presentation I gave on the Milky Way disc. The idea underneath was to touch those topics that can be considered hot nowadays in the Galactic disk research: the reality of the thick disk, the spiral structure of the Milky Way, and the properties of the ou ...
... Abstract / This review summarises the invited presentation I gave on the Milky Way disc. The idea underneath was to touch those topics that can be considered hot nowadays in the Galactic disk research: the reality of the thick disk, the spiral structure of the Milky Way, and the properties of the ou ...