Black Holes in Binary Systems and Galaxy Nuclei
... Mean mass of the BH is ~9 MSun. None of this 26 BH candidates is X-ray pulsar, radiopulsar or X-ray burster of the first kind. Therefore none of these massive (mx > 3 MSun) compact objects shows the evidence of observed surface in agreement with the predictions of the Einstein General Relativity (!) ...
... Mean mass of the BH is ~9 MSun. None of this 26 BH candidates is X-ray pulsar, radiopulsar or X-ray burster of the first kind. Therefore none of these massive (mx > 3 MSun) compact objects shows the evidence of observed surface in agreement with the predictions of the Einstein General Relativity (!) ...
ATLAS lifts the Cup: discovery of a new Milky Way satellite in Crater⋆†
... The art of satellite classification, while it may seem like idle pettifoggery, is nonetheless of importance to our models of structure formation. By classifying the satellite, on the basis of all available observational evidence, as a dwarf galaxy, we momentarily gloss over the details of its indivi ...
... The art of satellite classification, while it may seem like idle pettifoggery, is nonetheless of importance to our models of structure formation. By classifying the satellite, on the basis of all available observational evidence, as a dwarf galaxy, we momentarily gloss over the details of its indivi ...
Downloadable Full Text
... confirmed to be one of the most metal-poor galaxies known14. On 1-4 Oct 2015, we obtained high-resolution spectra of the nine brightest member stars in Ret II (see Table 1, Extended Data Figure 1). The abundances of non-neutron-capture elements in all nine stars are consistent with abundances in oth ...
... confirmed to be one of the most metal-poor galaxies known14. On 1-4 Oct 2015, we obtained high-resolution spectra of the nine brightest member stars in Ret II (see Table 1, Extended Data Figure 1). The abundances of non-neutron-capture elements in all nine stars are consistent with abundances in oth ...
ASI 2017 Abstract Book - Astronomical Society of India
... Galaxy transformation in the local Universe One of the most outstanding challenges in extragalactic astronomy is to identify the astrophysical processes responsible for transforming simple dark matter haloes into the heterogenous population of galaxies inhabiting today's Universe. How did different ...
... Galaxy transformation in the local Universe One of the most outstanding challenges in extragalactic astronomy is to identify the astrophysical processes responsible for transforming simple dark matter haloes into the heterogenous population of galaxies inhabiting today's Universe. How did different ...
Direct Detection of Galactic Halo Dark Matter
... to harbor a substantial amount of unseen matter. Recent observations indirectly suggest that as much as half of this “dark matter” may be in the form of old, very cool white dwarfs, the remnants of an ancient population of stars as old as the galaxy itself. We conducted a survey to find faint, cool ...
... to harbor a substantial amount of unseen matter. Recent observations indirectly suggest that as much as half of this “dark matter” may be in the form of old, very cool white dwarfs, the remnants of an ancient population of stars as old as the galaxy itself. We conducted a survey to find faint, cool ...
The ATLAS3D project-XXII. Low-efficiency star formation in early
... simulations of gas discs embedded in isolated early-type and spiral galaxies. Despite using a universal local law to form stars in the simulations, we find that the earlytype galaxies are offset from the spirals on the large-scale Kennicutt relation, and form stars two to five times less efficiently ...
... simulations of gas discs embedded in isolated early-type and spiral galaxies. Despite using a universal local law to form stars in the simulations, we find that the earlytype galaxies are offset from the spirals on the large-scale Kennicutt relation, and form stars two to five times less efficiently ...
FLARE SWG theme 3: high
... FLARE case strongest if very clear that 2.5-5um and IFU is needed (e.g., quasar/galaxy separation; hosts; Mpc scales). ...
... FLARE case strongest if very clear that 2.5-5um and IFU is needed (e.g., quasar/galaxy separation; hosts; Mpc scales). ...
Dark Matter, Dark Energy, and the Fate of the Universe
... universe was born about 14 billion years ago in the Big Bang and ...
... universe was born about 14 billion years ago in the Big Bang and ...
TNO Time Allocation Committee
... During our runs with the 2.4m Thai National Telescope in January 2014, we observed a similar photometric signature on SDSS J1021+1744, another eclipsing post common-envelope binaries which, however, is much fainter than QS Vir. The first report of an unusual drop of brightness in this binary comes f ...
... During our runs with the 2.4m Thai National Telescope in January 2014, we observed a similar photometric signature on SDSS J1021+1744, another eclipsing post common-envelope binaries which, however, is much fainter than QS Vir. The first report of an unusual drop of brightness in this binary comes f ...
CURTIN INSTITUTE OF RADIO ASTRONOMY POST
... Constraining Jet Activity in Radio Galaxies Using New MWA Data Present astrophysical theories hold that all sufficiently large galaxies host supermassive black holes at their centres. For reasons not entirely understood, these supermassive black holes sometimes spew out jets of energetic particles. ...
... Constraining Jet Activity in Radio Galaxies Using New MWA Data Present astrophysical theories hold that all sufficiently large galaxies host supermassive black holes at their centres. For reasons not entirely understood, these supermassive black holes sometimes spew out jets of energetic particles. ...
The Be/X-ray transient V0332153: evidence for a tilt between the
... discuss the evolution of the circumstellar envelope. Owing to the low inclination of the system, parameters are strongly constrained. We find strong evidence for a tilt of the orbital plane with respect to the circumstellar disc (presumably on the equatorial plane). Even though the periastron distan ...
... discuss the evolution of the circumstellar envelope. Owing to the low inclination of the system, parameters are strongly constrained. We find strong evidence for a tilt of the orbital plane with respect to the circumstellar disc (presumably on the equatorial plane). Even though the periastron distan ...
R585 EXPLORERS OF THE SOUTHERN SKY
... (softcover) - ISBN 0 521 55091 2 - number of pages : 185 - evolution of stars and galaxies/quasars amateur “Our Evolving Universe” is a lucid, non-technical and infectiously enthusiastic introduction to current astronomy and cosmology. Highly illustrated throughout with the latest colour images from ...
... (softcover) - ISBN 0 521 55091 2 - number of pages : 185 - evolution of stars and galaxies/quasars amateur “Our Evolving Universe” is a lucid, non-technical and infectiously enthusiastic introduction to current astronomy and cosmology. Highly illustrated throughout with the latest colour images from ...
Radio observations of the planetary nebula around the OH/IR Star
... The 3, 6, 13 and 20-cm continuum images were made using natural weighting. All 3-cm data were used because there were no indications of broad scale Galactic emission. We cut out 6-cm data with uv-distances <2 kλ to eliminate a low-level extended wash of Galactic emission and this radically improved ...
... The 3, 6, 13 and 20-cm continuum images were made using natural weighting. All 3-cm data were used because there were no indications of broad scale Galactic emission. We cut out 6-cm data with uv-distances <2 kλ to eliminate a low-level extended wash of Galactic emission and this radically improved ...
Science Says: What Scientific Evidence Can Say About the
... only possible if a Big Bang event of some kind had happened, as the event would indicate an expansion that would not stop until it ran out of energy. This constant makes masses such as galaxies appear to repel each other. Gravity, on the other hand, would pull them together. This push and pull is no ...
... only possible if a Big Bang event of some kind had happened, as the event would indicate an expansion that would not stop until it ran out of energy. This constant makes masses such as galaxies appear to repel each other. Gravity, on the other hand, would pull them together. This push and pull is no ...
Full-text PDF
... them from forming stars at late times when their mass and morphology can still change through mergers. The result is a galaxy luminosity function with a sharper high-mass cutoff in which the most massive systems are red, dead and elliptical. To make quantitative predictions for the galaxy population ...
... them from forming stars at late times when their mass and morphology can still change through mergers. The result is a galaxy luminosity function with a sharper high-mass cutoff in which the most massive systems are red, dead and elliptical. To make quantitative predictions for the galaxy population ...
GRB prompt emission
... Allowed Astronomers To watch the bursts Fade, and then Study their Host Galaxy! ...
... Allowed Astronomers To watch the bursts Fade, and then Study their Host Galaxy! ...
GRB prompt emission
... Allowed Astronomers To watch the bursts Fade, and then Study their Host Galaxy! ...
... Allowed Astronomers To watch the bursts Fade, and then Study their Host Galaxy! ...
A timeline of the universe
... today’s dwarf galaxies,” says Bryan. On the baryon side of the equation, successive stellar generations eventually created enough metals to bring the star-formation process in line with what we see today. At that point, stars of all masses can form. Still, astronomers have yet to fill in the details ...
... today’s dwarf galaxies,” says Bryan. On the baryon side of the equation, successive stellar generations eventually created enough metals to bring the star-formation process in line with what we see today. At that point, stars of all masses can form. Still, astronomers have yet to fill in the details ...
How To Find Newborn Black Holes Kazumi Kashiyama (UCB)
... required to form a stable disk at the last stable orbit of a Schwarzschild black hole (lower curve) or Kerr black hole (upper curve) including the given mass. The intermediate curve that follows the Schwarzschild curve until far out in the star uses the integrated angular momentum in the model to de ...
... required to form a stable disk at the last stable orbit of a Schwarzschild black hole (lower curve) or Kerr black hole (upper curve) including the given mass. The intermediate curve that follows the Schwarzschild curve until far out in the star uses the integrated angular momentum in the model to de ...
Senior thesis - University of Texas Astronomy Home Page
... accessibility of the MONET creates a number of scientific advantages. For example, time critical data can be obtained quickly without waiting for scheduled 82 observing runs. Moreover, data can be obtained evenly throughout the year rather than every few months. Finally, the MONET allows for telesco ...
... accessibility of the MONET creates a number of scientific advantages. For example, time critical data can be obtained quickly without waiting for scheduled 82 observing runs. Moreover, data can be obtained evenly throughout the year rather than every few months. Finally, the MONET allows for telesco ...
Project 2. CCD Photometry
... response function of the CCD, etc. To get around these problems, systems of standard stars have been set up so observers can calibrate their observations against the known brightness of the standard stars. Transformation coefficients M = m0 + t (colour) + z where capital letters ar ...
... response function of the CCD, etc. To get around these problems, systems of standard stars have been set up so observers can calibrate their observations against the known brightness of the standard stars. Transformation coefficients M = m0 + t (colour) + z where capital letters ar ...
Hubble Deep Field
The Hubble Deep Field (HDF) is an image of a small region in the constellation Ursa Major, constructed from a series of observations by the Hubble Space Telescope. It covers an area 2.5 arcminutes across, about one 24-millionth of the whole sky, which is equivalent in angular size to a 65 mm tennis ball at a distance of 100 metres. The image was assembled from 342 separate exposures taken with the Space Telescope's Wide Field and Planetary Camera 2 over ten consecutive days between December 18 and December 28, 1995.The field is so small that only a few foreground stars in the Milky Way lie within it; thus, almost all of the 3,000 objects in the image are galaxies, some of which are among the youngest and most distant known. By revealing such large numbers of very young galaxies, the HDF has become a landmark image in the study of the early universe, with the associated scientific paper having received over 900 citations by the end of 2014.Three years after the HDF observations were taken, a region in the south celestial hemisphere was imaged in a similar way and named the Hubble Deep Field South. The similarities between the two regions strengthened the belief that the universe is uniform over large scales and that the Earth occupies a typical region in the Universe (the cosmological principle). A wider but shallower survey was also made as part of the Great Observatories Origins Deep Survey. In 2004 a deeper image, known as the Hubble Ultra-Deep Field (HUDF), was constructed from a few months of light exposure. The HUDF image was at the time the most sensitive astronomical image ever made at visible wavelengths, and it remained so until the Hubble Extreme Deep Field (XDF) was released in 2012.