Investigating the Spectral Energy Distribution TARA JILL PARKIN
... in turn may lead us to advances in our understanding of how the Universe itself has ...
... in turn may lead us to advances in our understanding of how the Universe itself has ...
Binary progenitor models of type IIb supernovae
... evolution code. We identify the limited range of initial orbital periods and mass ratios required to produce type IIb binary progenitors. The rate we predict from our standard models, which assume conservative mass transfer, is about six times smaller than the current rate indicated by observations. ...
... evolution code. We identify the limited range of initial orbital periods and mass ratios required to produce type IIb binary progenitors. The rate we predict from our standard models, which assume conservative mass transfer, is about six times smaller than the current rate indicated by observations. ...
Jaká kritéria jsou vhodná ke klasifikaci hvězd horní části hlavní
... spectra is one of the main tasks of astrophysics. Let it be stars, nebulae or galaxies that we observe, spectroscopy always gives us some useful information, that furthers our understanding of physics of the observed object. Spectroscopic methods are of great importance especially when it comes to c ...
... spectra is one of the main tasks of astrophysics. Let it be stars, nebulae or galaxies that we observe, spectroscopy always gives us some useful information, that furthers our understanding of physics of the observed object. Spectroscopic methods are of great importance especially when it comes to c ...
The X-ray/radio and UV luminosity expected from symbiotic systems
... This agrees with few cases of observed UV excess among SNe Ia. In the above observations, Observations (1) and (2) favor WD + RG, while observation (3) disfavors them. Observation (4) brings out an interesting question which needs to be addressed by the SD model. We show in theory that actually, obs ...
... This agrees with few cases of observed UV excess among SNe Ia. In the above observations, Observations (1) and (2) favor WD + RG, while observation (3) disfavors them. Observation (4) brings out an interesting question which needs to be addressed by the SD model. We show in theory that actually, obs ...
ongoing massive star formation in the bulge of m511 hjglm lamers,2
... remove most of the contribution from the cosmic rays (see Paper 1). Unfortunately, the corrected images still showed some residual contamination from cosmic rays, which could have a†ected the photometry. To obtain a list of the pointlike sources in each Ðlter, we used an unsharp masking method. This ...
... remove most of the contribution from the cosmic rays (see Paper 1). Unfortunately, the corrected images still showed some residual contamination from cosmic rays, which could have a†ected the photometry. To obtain a list of the pointlike sources in each Ðlter, we used an unsharp masking method. This ...
Early Star-Forming Galaxies and the Reionisation of the Universe
... signature caused by Lyman limit photons as they migrate out of a young galaxy might be observable. If such a photon encounters neutral gas in the galaxy, it will likely ionise a portion of that gas and lead to line emission as well as free-free and bound-free scatterings between electrons and proton ...
... signature caused by Lyman limit photons as they migrate out of a young galaxy might be observable. If such a photon encounters neutral gas in the galaxy, it will likely ionise a portion of that gas and lead to line emission as well as free-free and bound-free scatterings between electrons and proton ...
Infrared Solar Physics - National Optical Astronomy Observatory
... many years to address critical science questions in that field. The spatial resolution, flux and background problems are even more extreme at night than they are for observations of the Sun. Infrared detector and instrument technology is clearly robust, and the scientific advantages are important. S ...
... many years to address critical science questions in that field. The spatial resolution, flux and background problems are even more extreme at night than they are for observations of the Sun. Infrared detector and instrument technology is clearly robust, and the scientific advantages are important. S ...
An Atlas of Stellar Spectra
... The present system depends, then, to a considerable extent on the work of these investigators, combined with data which were not available until recently. These data are of two kinds: accurate color equivalents for many of the brighter stars and accurate absolute magnitudes for a number of the same ...
... The present system depends, then, to a considerable extent on the work of these investigators, combined with data which were not available until recently. These data are of two kinds: accurate color equivalents for many of the brighter stars and accurate absolute magnitudes for a number of the same ...
Downloadable Full Text
... evolution theory. Thus, this one particular star system illustrates many different aspects of binary stellar evolution. Key words: binaries: spectroscopic – stars: dwarf novae – stars: early-type – stars: individual (Regulus, α Leo) – stars: variables: other ...
... evolution theory. Thus, this one particular star system illustrates many different aspects of binary stellar evolution. Key words: binaries: spectroscopic – stars: dwarf novae – stars: early-type – stars: individual (Regulus, α Leo) – stars: variables: other ...
PPT presentation
... We have shown on a sample of 21 galaxies that the M/L gradients by PN and stellar kinematics are generally in agreement with the LCDM expectations with some “critical points”: a) nearly L* galaxies are in conflict with “reasonable” formation efficiency unless we do not assume low-concentration halos ...
... We have shown on a sample of 21 galaxies that the M/L gradients by PN and stellar kinematics are generally in agreement with the LCDM expectations with some “critical points”: a) nearly L* galaxies are in conflict with “reasonable” formation efficiency unless we do not assume low-concentration halos ...
A Theory of Extrasolar Giant Planets
... Our theory starts with the assumption that EGP's have been somehow formed from an initially gaseous, high-entropy state. Current theoretical models for forming giant planets require relatively rapid accretion of large amounts of protoplanetary disk gas onto a core of rocky and icy material (Podolak, ...
... Our theory starts with the assumption that EGP's have been somehow formed from an initially gaseous, high-entropy state. Current theoretical models for forming giant planets require relatively rapid accretion of large amounts of protoplanetary disk gas onto a core of rocky and icy material (Podolak, ...
Particle kinematics in solar flares: observations - ETH E
... us to study fine structures as small as several hundred kilometers. Further, it is constantly monitored by both, ground based and space born instruments which deliver gigabytes of data every day. In some sense one could call the Sun a laboratory at our doorstep. We cannot change the laboratory setup ...
... us to study fine structures as small as several hundred kilometers. Further, it is constantly monitored by both, ground based and space born instruments which deliver gigabytes of data every day. In some sense one could call the Sun a laboratory at our doorstep. We cannot change the laboratory setup ...
The Destruction of an Oort Cloud in a rich stellar cluster
... of the galactic disk tide plus field star encounters. The effect of the resulting present Oort Cloud being dominated by a tight, inner core was confirmed as well as the possibility of obtaining a Sedna-type population due to the random effects of the closest stellar encounters. An often cited model ...
... of the galactic disk tide plus field star encounters. The effect of the resulting present Oort Cloud being dominated by a tight, inner core was confirmed as well as the possibility of obtaining a Sedna-type population due to the random effects of the closest stellar encounters. An often cited model ...
A Herschel/HIFI study of Water in Two Intermediate
... collapsing into one another under their own gravity. While mechanisms that produce high-mass stars have been proposed, their scarcity and greater distances make studying a high-mass star forming regions difficult due to low spatial resolution. Forming deeply embedded in molecular clouds, they quickly ...
... collapsing into one another under their own gravity. While mechanisms that produce high-mass stars have been proposed, their scarcity and greater distances make studying a high-mass star forming regions difficult due to low spatial resolution. Forming deeply embedded in molecular clouds, they quickly ...
Variability of young solar-type stars: Spot cycles, rotation
... akin to the 11 year spot cycle of the Sun, and other possible regularities present in the distribution of the starspots. Measurements of the chromospheric emission level by high resolution spectroscopy will furthermore directly provide useful estimates of the activity level of a star. Despite the fa ...
... akin to the 11 year spot cycle of the Sun, and other possible regularities present in the distribution of the starspots. Measurements of the chromospheric emission level by high resolution spectroscopy will furthermore directly provide useful estimates of the activity level of a star. Despite the fa ...