Jul y 9- 11,
... The grand-design spiral galaxy NGC 6946 is remarkable due to its high star formation activity, its massive northern spiral arm and the “magnetic arms,” visible in radio continuum polarization and located between the optical arms. Strong Faraday depolarization of the polarized radio emission from the ...
... The grand-design spiral galaxy NGC 6946 is remarkable due to its high star formation activity, its massive northern spiral arm and the “magnetic arms,” visible in radio continuum polarization and located between the optical arms. Strong Faraday depolarization of the polarized radio emission from the ...
Red supergiants and the past of Cygnus OB2
... main star-forming sites have been shifting with time. The study of this older component is made difficult by the effects of stellar evolution, and in particular by the fact that its most massive components have already disappeared as supernovae. A thus far unexplored probe of the massive star format ...
... main star-forming sites have been shifting with time. The study of this older component is made difficult by the effects of stellar evolution, and in particular by the fact that its most massive components have already disappeared as supernovae. A thus far unexplored probe of the massive star format ...
Surface Gravity as a Diagnostic ... Youth Cameron Higby-Naquin Advisor: Eric Jensen
... Knowing the age of a star is only the first step to understanding stellar evolution and completely describing how stars change with time. In short, different stars take different amounts of time to form, and to fully grasp the formation process, physical properties of the star must be determined. A ...
... Knowing the age of a star is only the first step to understanding stellar evolution and completely describing how stars change with time. In short, different stars take different amounts of time to form, and to fully grasp the formation process, physical properties of the star must be determined. A ...
Final Stages of Stellar Evolution - supernovae and the synthesis of
... supermassive black holes in center of most galaxies → collapse of dense cluster of stars large amouts of mass accreting onto stellar “seed” black hole fusion of smaller black holes masses up to 109 · M ...
... supermassive black holes in center of most galaxies → collapse of dense cluster of stars large amouts of mass accreting onto stellar “seed” black hole fusion of smaller black holes masses up to 109 · M ...
Light on Dark Matter with Weak Gravitational Lensing
... In the beginning of the twentieth century, A. Einstein predicted that massive bodies could be seen as gravitational lenses that bend the path of light rays by creating a local curvature in space-time. One of the first confirmations of Einstein’s new theory was the observation during the 1919 eclipse ...
... In the beginning of the twentieth century, A. Einstein predicted that massive bodies could be seen as gravitational lenses that bend the path of light rays by creating a local curvature in space-time. One of the first confirmations of Einstein’s new theory was the observation during the 1919 eclipse ...
Infrared Properties of Star-Forming Dwarf Galaxies. I. Dwarf Irregular
... dwarfs.’’ BCDs include gas, stars, and usually starburst regions, all of which are centrally concentrated. Due to their pronounced compact starbursts, BCDs have higher surface brightnesses (B 22 mag arcsec2). Like dIs, BCDs are also metal-poor, with Z as low as 1/50 Z, showing a trend of redder ...
... dwarfs.’’ BCDs include gas, stars, and usually starburst regions, all of which are centrally concentrated. Due to their pronounced compact starbursts, BCDs have higher surface brightnesses (B 22 mag arcsec2). Like dIs, BCDs are also metal-poor, with Z as low as 1/50 Z, showing a trend of redder ...
The Origin and Evolution of Dust in Galaxies
... Bridging local group galaxies to high-z galaxies ...
... Bridging local group galaxies to high-z galaxies ...
A Map of the Universe
... picture, at a scale of 1/108 , shows the entire Earth. The 14th picture, at a scale of 1/1014 , shows the entire Solar system. The 18th picture, at a scale of 1/1018 , includes α Centauri, The 22nd picture, at a scale of 1/1022 shows all of the Milky Way Galaxy. The 26th and last picture in the sequ ...
... picture, at a scale of 1/108 , shows the entire Earth. The 14th picture, at a scale of 1/1014 , shows the entire Solar system. The 18th picture, at a scale of 1/1018 , includes α Centauri, The 22nd picture, at a scale of 1/1022 shows all of the Milky Way Galaxy. The 26th and last picture in the sequ ...
Finding Dark Matter
... • Developed computational tools and protocols for analyzing many GBs of nightly CTIO observations in almost real time to pick out interesting events and prioritize them for followup observation – Follow-up is time critical because events are only active for a few weeks ...
... • Developed computational tools and protocols for analyzing many GBs of nightly CTIO observations in almost real time to pick out interesting events and prioritize them for followup observation – Follow-up is time critical because events are only active for a few weeks ...
The Milky Way as a galaxy
... at the location of the Sun (see Fig. 2.2). The Galactic plane is the plane of the Galactic disk, i.e., it is parallel to the band of the Milky Way. The two Galactic coordinates ` and b are angular coordinates on the sphere. Here, b denotes the Galactic latitude, the angular distance of a source from ...
... at the location of the Sun (see Fig. 2.2). The Galactic plane is the plane of the Galactic disk, i.e., it is parallel to the band of the Milky Way. The two Galactic coordinates ` and b are angular coordinates on the sphere. Here, b denotes the Galactic latitude, the angular distance of a source from ...
XXII. Low-efficiency star formation in early-type galaxies
... with H I masses from 107 to a few 109 M . More relevant for star formation, molecular gas is detected in 22 per cent of ETGs, with an average molecular gas-to-star mass fraction of a few per cent (1– 5 per cent, Young et al. 2011, hereafter Paper IV), similar to what is found in some spirals. These ...
... with H I masses from 107 to a few 109 M . More relevant for star formation, molecular gas is detected in 22 per cent of ETGs, with an average molecular gas-to-star mass fraction of a few per cent (1– 5 per cent, Young et al. 2011, hereafter Paper IV), similar to what is found in some spirals. These ...
Discovery of extremely lead-rich subdwarfs: does heavy metal signal
... Hot subdwarfs represent a group of low-mass helium-burning stars formed through binarystar interactions and include some of the most chemically peculiar stars in the Galaxy. Stellar evolution theory suggests that they should have helium-rich atmospheres but, because radiation causes hydrogen to diff ...
... Hot subdwarfs represent a group of low-mass helium-burning stars formed through binarystar interactions and include some of the most chemically peculiar stars in the Galaxy. Stellar evolution theory suggests that they should have helium-rich atmospheres but, because radiation causes hydrogen to diff ...
GammaRay Bursts, the Strongest Explosions in the Universe.
... Gregory Chibisov6 suggested that GRBs could be extra galactic, making them much more powerful than if they were produced by relativity “local” Galactic objects. Note that a source at distant galaxy is million times further than a source in our own Galaxy. This would ma ...
... Gregory Chibisov6 suggested that GRBs could be extra galactic, making them much more powerful than if they were produced by relativity “local” Galactic objects. Note that a source at distant galaxy is million times further than a source in our own Galaxy. This would ma ...
R585 EXPLORERS OF THE SOUTHERN SKY
... Basic design theory and its historical development Published by Springer Verlag - Astronomy & Astrophysics Library Series - author : Raymond N. Wilson - 1996 - DM 128,00/öS 934,40/sFr 113,00 (hardcover) - ISBN 3 540 58964 3 - number of pages : 546 Telescope Design and Construction - advanced amateur ...
... Basic design theory and its historical development Published by Springer Verlag - Astronomy & Astrophysics Library Series - author : Raymond N. Wilson - 1996 - DM 128,00/öS 934,40/sFr 113,00 (hardcover) - ISBN 3 540 58964 3 - number of pages : 546 Telescope Design and Construction - advanced amateur ...
Article PDF - IOPscience
... galaxies come in several types such that the relationship between bulge and disk light may not be as simple as these model fitting techniques assume. It is also not clear that bulges are well fitted by the de Vaucouleurs profile, with significant evidence that they are not (Andredakis & Sanders 1994; Ma ...
... galaxies come in several types such that the relationship between bulge and disk light may not be as simple as these model fitting techniques assume. It is also not clear that bulges are well fitted by the de Vaucouleurs profile, with significant evidence that they are not (Andredakis & Sanders 1994; Ma ...
Rotation Periods and Relative Ages of Solar-Type Stars
... Isochrones are theoretical plots of various-aged stars on axes of log Teff (effective temperature) and δMbol (bolometric luminosity). Also, Ca II H (396.8 nm) and K (383.4 nm) chromospheric emissions are empirically linked to ages (Soderblom et al. 1991). By fitting Strömgren uvby-Hβ photometry data ...
... Isochrones are theoretical plots of various-aged stars on axes of log Teff (effective temperature) and δMbol (bolometric luminosity). Also, Ca II H (396.8 nm) and K (383.4 nm) chromospheric emissions are empirically linked to ages (Soderblom et al. 1991). By fitting Strömgren uvby-Hβ photometry data ...
1. The Birth of a Star
... press the [C] key once. This will instruct your ship to swing and point its nose (the bow) directly toward a faint colored cloud in space named “M42”. Notice that in the same info display, the distance from you to that cloud is listed as 1,177.7 ly. The “ly” stands for “Light Year”. It is not a time ...
... press the [C] key once. This will instruct your ship to swing and point its nose (the bow) directly toward a faint colored cloud in space named “M42”. Notice that in the same info display, the distance from you to that cloud is listed as 1,177.7 ly. The “ly” stands for “Light Year”. It is not a time ...
Behaviour of elements from lithium to europium in stars with and
... online ELODIE reduction software, while the order deblazing and the cosmic, telluric lines and bad pixel removal were performed following the recipes described in Katz et al. (1998). Further treatment of spectra (the continuous spectrum level placement, measurement of the equivalent widths etc.) was ...
... online ELODIE reduction software, while the order deblazing and the cosmic, telluric lines and bad pixel removal were performed following the recipes described in Katz et al. (1998). Further treatment of spectra (the continuous spectrum level placement, measurement of the equivalent widths etc.) was ...
Hands-On Activities
... Roman god of war (the counterpart of the Greek Ares), on account of its blood red color as viewed in the night sky. Mercury: The innermost and smallest planet in the solar system (since Pluto was re-labeled as a dwarf planet), orbiting the Sun once every 88 days. meteor: The visible event that occur ...
... Roman god of war (the counterpart of the Greek Ares), on account of its blood red color as viewed in the night sky. Mercury: The innermost and smallest planet in the solar system (since Pluto was re-labeled as a dwarf planet), orbiting the Sun once every 88 days. meteor: The visible event that occur ...
LIGO SURF 2006 Lecture 1 - Indico
... (at speeds close to c), eg, because it’s orbiting a companion, the “news” of the changing gravitational field propagates outward as gravitational radiation – a wave of spacetime curvature AJW, CERN, Aug 11, 2006 ...
... (at speeds close to c), eg, because it’s orbiting a companion, the “news” of the changing gravitational field propagates outward as gravitational radiation – a wave of spacetime curvature AJW, CERN, Aug 11, 2006 ...
Masses of Dwarf Satellites of the Milky Way
... Here, Lgal and LMW are the individual probability distributions of Segue 1 and the Milky Way galaxies parameterized by the set Mgal,MW . The metallicity distribution of the member and nonmember stars are each modeled by Gaussians with mean metallicities w̄gal , w̄MW and widths σw,gal , σw,MW respect ...
... Here, Lgal and LMW are the individual probability distributions of Segue 1 and the Milky Way galaxies parameterized by the set Mgal,MW . The metallicity distribution of the member and nonmember stars are each modeled by Gaussians with mean metallicities w̄gal , w̄MW and widths σw,gal , σw,MW respect ...
Neutron Star and Superfluidity
... copper pairs due to the long-range attractive nuclear force and lead to superfluidity and superconductivity[2, 3]. In this paper, I will only focus on nucleon superfluidity and left behind other possible interesting microphysics that may also take place inside neutron stars, including superconductivit ...
... copper pairs due to the long-range attractive nuclear force and lead to superfluidity and superconductivity[2, 3]. In this paper, I will only focus on nucleon superfluidity and left behind other possible interesting microphysics that may also take place inside neutron stars, including superconductivit ...