Collaborative Research Projects for Amateur Astronomers
... IRO Small Comet Search: Observational Summary The observations were made using the 0.5 m f/8 reflector of the Iowa Robotic Observatory between 24 September 1998 and 11 June 1999. Observations were scheduled every month within one week of new moon. A total of 6,148 images were obtained, of which ...
... IRO Small Comet Search: Observational Summary The observations were made using the 0.5 m f/8 reflector of the Iowa Robotic Observatory between 24 September 1998 and 11 June 1999. Observations were scheduled every month within one week of new moon. A total of 6,148 images were obtained, of which ...
Differential rotation on both components of the pre-main
... minimal due to the fact that for most of the orbit (approximately two-thirds) the profiles of the two stars are cleanly separated in velocity space. The DoTS code has been extensively tested on binary systems with more entangled spectra than HD 155555, for example the contact system AE Phe was mappe ...
... minimal due to the fact that for most of the orbit (approximately two-thirds) the profiles of the two stars are cleanly separated in velocity space. The DoTS code has been extensively tested on binary systems with more entangled spectra than HD 155555, for example the contact system AE Phe was mappe ...
Tracing the Evolution and Impact of the Stellar Winds
... boundary where the winds of the Sun are expected to meet the material of the ISM, and is shown as the boundary between Regions 2 and 3 in Figure 1.2. The heliosphere has been adopted as a marker for determining Voyager 1 ’s transition from the inside to the outside of the solar system. The difficult ...
... boundary where the winds of the Sun are expected to meet the material of the ISM, and is shown as the boundary between Regions 2 and 3 in Figure 1.2. The heliosphere has been adopted as a marker for determining Voyager 1 ’s transition from the inside to the outside of the solar system. The difficult ...
Classification of Variable Stars
... three letter constellation abbreviation. There are also variables with names such as V746 Oph and 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 de ...
... three letter constellation abbreviation. There are also variables with names such as V746 Oph and 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 de ...
Planet X, Comets and Earth Changes
... His theoretical work additionally stated that comets were not dirty snowballs, but were large electrical “vacuum cleaners” in outer space. The comets were drawing in vast amounts of material by way of powerful electrical forces and there was potential for very large comets capable of disrupting the ...
... His theoretical work additionally stated that comets were not dirty snowballs, but were large electrical “vacuum cleaners” in outer space. The comets were drawing in vast amounts of material by way of powerful electrical forces and there was potential for very large comets capable of disrupting the ...
PDF - ASSA
... been complemented with the huge 28-m HESS II telescope and is one of the most sensitive detectors of very high-energy gamma rays. These are absorbed in the atmosphere, where they create a short-lived shower of particles. The HESS telescopes detect the faint, short flashes of bluish light which these ...
... been complemented with the huge 28-m HESS II telescope and is one of the most sensitive detectors of very high-energy gamma rays. These are absorbed in the atmosphere, where they create a short-lived shower of particles. The HESS telescopes detect the faint, short flashes of bluish light which these ...
Earth_Science_Notebook_January_2011
... 2. What is electromagnetic radiation and how do we use it in our everyday lives? 3. How are frequency and wavelength of a wave related? 4. How can astronomers figure out the temperature, chemical composition, and luminosity (brightness) of a star? ...
... 2. What is electromagnetic radiation and how do we use it in our everyday lives? 3. How are frequency and wavelength of a wave related? 4. How can astronomers figure out the temperature, chemical composition, and luminosity (brightness) of a star? ...
The isotopic mixture of barium in the metal-poor
... Magain would give a value of f odd (0.08) close to his value. The FWHM of the Ba II line appears not to be affected by blending lines. Cowley & Frey searched for potential blends that might be disturbing the profile in a solar-like star, concluding that only two transitions Cr I 4553.94 Å and Zr I ...
... Magain would give a value of f odd (0.08) close to his value. The FWHM of the Ba II line appears not to be affected by blending lines. Cowley & Frey searched for potential blends that might be disturbing the profile in a solar-like star, concluding that only two transitions Cr I 4553.94 Å and Zr I ...
Word doc - Infinity Internet
... Adams, George. Astronomical & geographical essays: containing, I. A full and comprehensive view, on a new plan, of the general principles of astronomy. II. The use of the celestial and terrestrial globes, exemplified in a greater variety of problems, than are to be found in any other work. III. The ...
... Adams, George. Astronomical & geographical essays: containing, I. A full and comprehensive view, on a new plan, of the general principles of astronomy. II. The use of the celestial and terrestrial globes, exemplified in a greater variety of problems, than are to be found in any other work. III. The ...
The Life Cycle of Stars: Supernovae in Starbursts by Jason Kezwer
... these dusty galaxies is an important step toward confirming theorized star formation rates and settling the debate between the dominant energy source in LIRGs: star formation or AGN activity. Both the deduced high star formation rate and far-IR luminosity of Arp 220 suggest an atypically high supern ...
... these dusty galaxies is an important step toward confirming theorized star formation rates and settling the debate between the dominant energy source in LIRGs: star formation or AGN activity. Both the deduced high star formation rate and far-IR luminosity of Arp 220 suggest an atypically high supern ...
book_text4
... in an orbit roughly 600 km above the Earth’s surface. On Earth, astronomers waited impatiently for the first results. After extensive technical verification and testing, it soon became obvious that Hubble’s vision was anything but sharp. The mirror had a serious flaw. A defect in the shape of the mi ...
... in an orbit roughly 600 km above the Earth’s surface. On Earth, astronomers waited impatiently for the first results. After extensive technical verification and testing, it soon became obvious that Hubble’s vision was anything but sharp. The mirror had a serious flaw. A defect in the shape of the mi ...
Beyond Pluto: Exploring the outer limits of the solar - e
... motion of Uranus hinted that it was being tugged by the gravitational pull of another, more distant world still waiting to be discovered. In a now classic story of astronomical detective work, the mathematicians Urbain Le Verrier of France and John Couch Adams of England independently calculated the ...
... motion of Uranus hinted that it was being tugged by the gravitational pull of another, more distant world still waiting to be discovered. In a now classic story of astronomical detective work, the mathematicians Urbain Le Verrier of France and John Couch Adams of England independently calculated the ...
Open clusters and associations in the Gaia era
... uncertainties. Indeed the conversion of colors and magnitudes into masses depends on evolutionary models which may not be very well constrained, especially at low masses and very young ages. As an example, the ONC mass function may show very different features below 0.3M when using different models ...
... uncertainties. Indeed the conversion of colors and magnitudes into masses depends on evolutionary models which may not be very well constrained, especially at low masses and very young ages. As an example, the ONC mass function may show very different features below 0.3M when using different models ...
Building a model astrolabe - In-The
... climates for use at different latitudes. Usually the womb was deep enough that all of the climates could be stacked within for convenient storage. In Figure 2, for simplicity, only a single climate is provided for latitude 52°N and it is incorporated into the image of the front of the mother. In the ...
... climates for use at different latitudes. Usually the womb was deep enough that all of the climates could be stacked within for convenient storage. In Figure 2, for simplicity, only a single climate is provided for latitude 52°N and it is incorporated into the image of the front of the mother. In the ...
Statistical properties of a sample of periodically variable B-type supergiants ⋆
... since they are (by definition) free from saturation effects and least affected by collisional broadening. We have the following lines at our disposal: either Si II 4128-4130 or Si III 45524567-4574 (depending on spectral type), Mg II 4481 (in the same spectral order as He I 4471) and, for slow rotat ...
... since they are (by definition) free from saturation effects and least affected by collisional broadening. We have the following lines at our disposal: either Si II 4128-4130 or Si III 45524567-4574 (depending on spectral type), Mg II 4481 (in the same spectral order as He I 4471) and, for slow rotat ...
The spectroscopic Hertzsprung-Russell diagram
... allowed it to distinguish fundamentally different types of stars. Already Hertzsprung and Russell realized that the apparent stellar brightness is insufficient to draw any conclusions, but that the absolute brightnesses, i.e. the distances, are required to properly order the stars in the HR diagram. ...
... allowed it to distinguish fundamentally different types of stars. Already Hertzsprung and Russell realized that the apparent stellar brightness is insufficient to draw any conclusions, but that the absolute brightnesses, i.e. the distances, are required to properly order the stars in the HR diagram. ...
The chemical composition of solar-type stars and its impact on the
... Since we use the logarithm to base ten, one dex stands for one order of magnitude. ...
... Since we use the logarithm to base ten, one dex stands for one order of magnitude. ...
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... core formation (a few million years) requires planetesimal accretion to have proceeded in a runaway regime from a small initial mass up to the critical-mass planetary core. Importantly, the runaway accretion, which ends at a core mass ...
... core formation (a few million years) requires planetesimal accretion to have proceeded in a runaway regime from a small initial mass up to the critical-mass planetary core. Importantly, the runaway accretion, which ends at a core mass ...