radioactive 26a1 in the galaxy: observations versus theory
... understand the energetics of stars in their various evolutionary stages and to explain the origin of the chemical elements and their isotopes in the Universe. Since the epochal paper of B2FH [ 161, it has been established that the majority of the chemical elements are produced by nuclear reactions i ...
... understand the energetics of stars in their various evolutionary stages and to explain the origin of the chemical elements and their isotopes in the Universe. Since the epochal paper of B2FH [ 161, it has been established that the majority of the chemical elements are produced by nuclear reactions i ...
White dwarf dynamical interactions and fast optical transients
... be very fast, and a common result is that the disruption takes place in a few orbital periods for the case of white dwarf mergers, and on short timescales for white dwarf collisions in which the low-mass member of the pair is captured in a highly eccentric orbit, typically in a few orbits as well. I ...
... be very fast, and a common result is that the disruption takes place in a few orbital periods for the case of white dwarf mergers, and on short timescales for white dwarf collisions in which the low-mass member of the pair is captured in a highly eccentric orbit, typically in a few orbits as well. I ...
Studies of dark matter in and around stars
... There is by now compelling evidence that most of the matter in the Universe is in the form of dark matter, a form of matter quite different from the matter we experience in every day life. The gravitational effects of this dark matter have been observed in many different ways but its true nature is ...
... There is by now compelling evidence that most of the matter in the Universe is in the form of dark matter, a form of matter quite different from the matter we experience in every day life. The gravitational effects of this dark matter have been observed in many different ways but its true nature is ...
ON THE POLAR CAPS OF THE THREE MUSKETEERS1
... the bulk of the phase variation. The amplitude of the observed phase modulation is also markedly different for the three sources. Another striking aspect of our phase-resolved phenomenology is the apparent lack of any common phase alignment between the observed modulation patterns for the two blackb ...
... the bulk of the phase variation. The amplitude of the observed phase modulation is also markedly different for the three sources. Another striking aspect of our phase-resolved phenomenology is the apparent lack of any common phase alignment between the observed modulation patterns for the two blackb ...
H EMISSION FROM HIGH-VELOCITY CLOUDS AND
... using the positions and intensity profiles of the skylines. The central 240 rows of each two-dimensional spectrum were extracted and then wavelength calibrated based on the positions of the skylines in the object’s spectrum (only possible with the red spectra) and the NeAr lamp spectra obtained at th ...
... using the positions and intensity profiles of the skylines. The central 240 rows of each two-dimensional spectrum were extracted and then wavelength calibrated based on the positions of the skylines in the object’s spectrum (only possible with the red spectra) and the NeAr lamp spectra obtained at th ...
Direct Dark Matter Search with the XENON100 Experiment
... of liquid xenon, as well as a 99 kg liquid xenon active veto, the electromagnetic radiation background is greatly suppressed. By utilizing the difference of (S2 /S1 ) between electronic recoil and nuclear recoil, the expected WIMP signature, a small nuclear recoil energy deposition, could be discrim ...
... of liquid xenon, as well as a 99 kg liquid xenon active veto, the electromagnetic radiation background is greatly suppressed. By utilizing the difference of (S2 /S1 ) between electronic recoil and nuclear recoil, the expected WIMP signature, a small nuclear recoil energy deposition, could be discrim ...
Observations and Theory of Dynamical Triggers for Star Formation
... M16 (Hester et al. 1996), and M8 (Caulet 1997). Other similar regions have been found in the Sco-Cen association (Bertoldi & Jenkins 1992). Some of these neutral regions may be protostellar disks, as argued in the papers on Orion, but Hester et al. (1996) claims that many are evaporating globules ra ...
... M16 (Hester et al. 1996), and M8 (Caulet 1997). Other similar regions have been found in the Sco-Cen association (Bertoldi & Jenkins 1992). Some of these neutral regions may be protostellar disks, as argued in the papers on Orion, but Hester et al. (1996) claims that many are evaporating globules ra ...
Physics of white dwarf stars
... unlike any other stellar group. The majority have lines of hydrogen only, extremely broadened by the high gravitational fields and correspondingly high pressures in the atmospheres; others show only the spectral lines of neutral helium, or only the Swan bands of the Cz molecule. Yet, others show onl ...
... unlike any other stellar group. The majority have lines of hydrogen only, extremely broadened by the high gravitational fields and correspondingly high pressures in the atmospheres; others show only the spectral lines of neutral helium, or only the Swan bands of the Cz molecule. Yet, others show onl ...
Stellar Evolution - Astrophysics
... First of all, the measurement of the parallactic done relative to some reference point. A common ap ing angular fiducials is to use background reference stars are infinitely distant, the parallactic angle as it tained from the two sub-frames of Fig. 1 readily p sired angular measure. However, since ...
... First of all, the measurement of the parallactic done relative to some reference point. A common ap ing angular fiducials is to use background reference stars are infinitely distant, the parallactic angle as it tained from the two sub-frames of Fig. 1 readily p sired angular measure. However, since ...
JOA Vol 1 No. 2 - Apr 2011 - RASNZ Occultation Section
... the early morning. The path covered Poland, Germany, France, Spain and Portugal. The star 2UCAC 39795518 (11.2 mag) was predicted to be occulted for about 6 seconds. The expected drop of 0.9 mag was small but the combined light of asteroid and star (10.6 mag) was detectible for my setup (video camer ...
... the early morning. The path covered Poland, Germany, France, Spain and Portugal. The star 2UCAC 39795518 (11.2 mag) was predicted to be occulted for about 6 seconds. The expected drop of 0.9 mag was small but the combined light of asteroid and star (10.6 mag) was detectible for my setup (video camer ...
Annual Report 2012 - Max Planck Institute for Astrophysics
... instrumental activities carried out in other MaxPlanck institutes. From its inception the MPA has The Max-Planck-Institut für Astrophysik, called had an internationally-recognized numerical astrothe MPA for short, was founded in 1958 under the physics program that is unparalleled by any other direct ...
... instrumental activities carried out in other MaxPlanck institutes. From its inception the MPA has The Max-Planck-Institut für Astrophysik, called had an internationally-recognized numerical astrothe MPA for short, was founded in 1958 under the physics program that is unparalleled by any other direct ...
THE FUTURE IS NOW: THE FORMATION OF SINGLE LOW
... WDs with TeA > 25;000 K that were used to estimate the formation rate without applying an incompleteness correction. We would expect two double degenerate systems, five close binary companions, and 3.5 distant binary companions. Three systems are known to have degenerate companions, and we find sign ...
... WDs with TeA > 25;000 K that were used to estimate the formation rate without applying an incompleteness correction. We would expect two double degenerate systems, five close binary companions, and 3.5 distant binary companions. Three systems are known to have degenerate companions, and we find sign ...
An X-Ray, Optical and Infra-red study of High-Mass X
... is continually growing and is now a similar size to that of the Milky Way, despite a significant mass difference between the two galaxies. In this thesis, I present multi-wavelength observations of Be/X-ray binaries that have undergone an outburst during the past three years, including the discovery ...
... is continually growing and is now a similar size to that of the Milky Way, despite a significant mass difference between the two galaxies. In this thesis, I present multi-wavelength observations of Be/X-ray binaries that have undergone an outburst during the past three years, including the discovery ...
Variability of young solar-type stars: Spot cycles, rotation
... Magnetic fields are a ubiquitous phenomenon in the universe, observed from the smallest scales up to the very largest ones. It is thus no wonder that we find them in a wide variety of stars and that they have an important role to play in the stellar behaviour and evolution. In late-type stars with con ...
... Magnetic fields are a ubiquitous phenomenon in the universe, observed from the smallest scales up to the very largest ones. It is thus no wonder that we find them in a wide variety of stars and that they have an important role to play in the stellar behaviour and evolution. In late-type stars with con ...
Whole Earth Telescope observations of BPM 37093: A
... amplitudes from the FTs of long data sets, but will still allow us to identify the pulsation modes which have the highest amplitudes and the longest lifetimes. The FTs of the two WET campaigns on BPM 37093 are shown in Fig. 2. In each panel we have marked all of the peaks that exceed 4 times the obs ...
... amplitudes from the FTs of long data sets, but will still allow us to identify the pulsation modes which have the highest amplitudes and the longest lifetimes. The FTs of the two WET campaigns on BPM 37093 are shown in Fig. 2. In each panel we have marked all of the peaks that exceed 4 times the obs ...
Star Formation and Dynamics in the Galactic Centre
... binaries), but this possibility is not supported by observations of currently active Xray sources. Thus, if the fluorescent X-ray line emission comes from a single source, such source must have been powerful enough: it might be the ‘echo’ of an energetic flaring event of Sgr A∗ that occurred several ...
... binaries), but this possibility is not supported by observations of currently active Xray sources. Thus, if the fluorescent X-ray line emission comes from a single source, such source must have been powerful enough: it might be the ‘echo’ of an energetic flaring event of Sgr A∗ that occurred several ...