System Level # Requirements Document
... These broad science goals have motivated a set of science-driven observatory capabilities and requirements that are described in this document, representing the consensus view of the Science Advisory Committee and the Project Scientist, after consultation with many expert engineers and scientists wi ...
... These broad science goals have motivated a set of science-driven observatory capabilities and requirements that are described in this document, representing the consensus view of the Science Advisory Committee and the Project Scientist, after consultation with many expert engineers and scientists wi ...
Chapter 7 Formation of Stars
... • Then, if there are strong winds emanating from the star, they would tend to be directed in bipolar flows perpendicular to the plane of the accretion disk. • However, it is difficult to explain the tight collimation of the jets (as good as 10% over one parsec) by such a mechanism, and the source of ...
... • Then, if there are strong winds emanating from the star, they would tend to be directed in bipolar flows perpendicular to the plane of the accretion disk. • However, it is difficult to explain the tight collimation of the jets (as good as 10% over one parsec) by such a mechanism, and the source of ...
RAL Space brochure - Science and Technology Facilities Council
... the spacecraft to climb out of the ecliptic, allowing it to make the first high latitude observations of the solar atmosphere. This will: determine insitu the properties and dynamics of plasma, magnetic fields and particles in the near-Sun heliosphere; survey the fine detail of the Sun's magnetised ...
... the spacecraft to climb out of the ecliptic, allowing it to make the first high latitude observations of the solar atmosphere. This will: determine insitu the properties and dynamics of plasma, magnetic fields and particles in the near-Sun heliosphere; survey the fine detail of the Sun's magnetised ...
BSA Astronomy Merit Badge
... person, making skin-to-skin contact. Then cover both of your bodies with blankets. Provide warm beverages. If the affected person is alert and able to swallow, provide a warm, nonalcoholic, non-caffeinated beverage to help warm the body. Use warm, dry compresses. Use a first-aid warm compress (a pla ...
... person, making skin-to-skin contact. Then cover both of your bodies with blankets. Provide warm beverages. If the affected person is alert and able to swallow, provide a warm, nonalcoholic, non-caffeinated beverage to help warm the body. Use warm, dry compresses. Use a first-aid warm compress (a pla ...
Chapter 8 Formation of Stars
... • Then, if there are strong winds emanating from the star, they would tend to be directed in bipolar flows perpendicular to the plane of the accretion disk. • However, it is difficult to explain the tight collimation of the jets (as good as 10% over one parsec) by such a mechanism, and the source of ...
... • Then, if there are strong winds emanating from the star, they would tend to be directed in bipolar flows perpendicular to the plane of the accretion disk. • However, it is difficult to explain the tight collimation of the jets (as good as 10% over one parsec) by such a mechanism, and the source of ...
3.2 Multi-Conjugate Adaptive Optics
... optics systems is still in its infancy, Gemini is poised to contribute substantially to this area in the coming years. Already early results from three independent simulations (two of which are in-house Gemini capabilities) suggest that a 3 deformable mirror, 5 wavefront sensor multi-conjugate adapt ...
... optics systems is still in its infancy, Gemini is poised to contribute substantially to this area in the coming years. Already early results from three independent simulations (two of which are in-house Gemini capabilities) suggest that a 3 deformable mirror, 5 wavefront sensor multi-conjugate adapt ...
ESA ACHIEVEMENTS
... Programme, the oldest in the Agency, hark back to the days of ESRO. ESRO’s seven successful scientific satellites paved the way for ESA’s remarkable series of pioneering missions that have placed Europe at the vanguard of disciplines such as X-ray, gamma-ray and infrared astronomy; astrometry; Solar ...
... Programme, the oldest in the Agency, hark back to the days of ESRO. ESRO’s seven successful scientific satellites paved the way for ESA’s remarkable series of pioneering missions that have placed Europe at the vanguard of disciplines such as X-ray, gamma-ray and infrared astronomy; astrometry; Solar ...
Eclipses Old Dead Guys Part I Astronomy 1 — Elementary Astronomy
... 4) During which of the portions of the planet’s orbit (A, B, C, or D) would the planet experience an increase in speed for at least a moment? a) Only during one of the portions shown. b) During two of the portions shown. c) During three of the portions shown. During four of the portions shown. Eleme ...
... 4) During which of the portions of the planet’s orbit (A, B, C, or D) would the planet experience an increase in speed for at least a moment? a) Only during one of the portions shown. b) During two of the portions shown. c) During three of the portions shown. During four of the portions shown. Eleme ...
Astronomy Astrophysics − Astrophysical parameters of the peculiar X-ray transient
... with a circular rotation velocity at the position of the Sun (dGC = 8.5 kpc) of 220 km s−1 . Along this line of sight, LSR velocities start at small negative values and become more negative with distance until reaching a minimum at −18.5 km s−1 (at a Galactocentric distance of 7.9 kpc, 3.2 kpc away ...
... with a circular rotation velocity at the position of the Sun (dGC = 8.5 kpc) of 220 km s−1 . Along this line of sight, LSR velocities start at small negative values and become more negative with distance until reaching a minimum at −18.5 km s−1 (at a Galactocentric distance of 7.9 kpc, 3.2 kpc away ...
2014 - Society for Astronomical Sciences
... Exposure times must be sufficient to get good signal to noise in the target and comparison stars. ...
... Exposure times must be sufficient to get good signal to noise in the target and comparison stars. ...
White dwarf binaries
... (i) in the V magnitude range, “inter” corresponds to the standstill brightness of Z Cam stars, and the normal maximum of SU UMa stars. (ii) rec is the mean recurrence time between outbursts. decay is the decay time from outburst. sup is the mean recurrence time between super outbursts. ...
... (i) in the V magnitude range, “inter” corresponds to the standstill brightness of Z Cam stars, and the normal maximum of SU UMa stars. (ii) rec is the mean recurrence time between outbursts. decay is the decay time from outburst. sup is the mean recurrence time between super outbursts. ...
surface composition of mercury - The University of Arizona Press
... our knowledge about Mercury's surface composition. Indeed, it could even constrain the primordial bulk chemistry of the planet; the assumption made here is that Mercury's surface was not altered or eradicated by a major event such as the volatilization of the outer layer(s) of the planet (Chapter by ...
... our knowledge about Mercury's surface composition. Indeed, it could even constrain the primordial bulk chemistry of the planet; the assumption made here is that Mercury's surface was not altered or eradicated by a major event such as the volatilization of the outer layer(s) of the planet (Chapter by ...
Observing the Planet Venus Teacher`s Guide
... 2012 was a monumental year for observing Venus. Venus’s orbit is inclined 3.4% relative to Earth’s orbit. Therefore, when Venus passes directly in front of Earth (inferior conjunction), or, passes dire ...
... 2012 was a monumental year for observing Venus. Venus’s orbit is inclined 3.4% relative to Earth’s orbit. Therefore, when Venus passes directly in front of Earth (inferior conjunction), or, passes dire ...
1. INTRODUCTION
... sets with more than 5 days of monitoring or with a signiÐcant number of Ñares (more than ten Ñares identiÐed by eye) were selected. Active coronal sources were our prime choice, as these stars often show several distinct stochastic events. We have focused our analysis on young, active stars that do ...
... sets with more than 5 days of monitoring or with a signiÐcant number of Ñares (more than ten Ñares identiÐed by eye) were selected. Active coronal sources were our prime choice, as these stars often show several distinct stochastic events. We have focused our analysis on young, active stars that do ...
The Classification of Stellar Spectra
... The early spectral classification system was based on the appearance of the spectra, but the physical reason for these differences in spectra were not understood until the 1930’s and 1940’s. Then it was realized that, while there were some chemical differences among stars, the main thing that determ ...
... The early spectral classification system was based on the appearance of the spectra, but the physical reason for these differences in spectra were not understood until the 1930’s and 1940’s. Then it was realized that, while there were some chemical differences among stars, the main thing that determ ...
Solar-type dynamo behaviour in fully convective stars without a
... in the same way as in Sun-like stars. As the X-ray activity – rotation relationship is a well-established proxy for the behaviour of the magnetic dynamo, these results imply that fully convective stars also operate a solar-type dynamo. The lack of a tachocline in fully convective stars therefore sug ...
... in the same way as in Sun-like stars. As the X-ray activity – rotation relationship is a well-established proxy for the behaviour of the magnetic dynamo, these results imply that fully convective stars also operate a solar-type dynamo. The lack of a tachocline in fully convective stars therefore sug ...
here - Georgia Tech Astronomy Club
... c. List the factors that keep the Moon in orbit around Earth. d. With the aid of diagrams, explain the relative positions of the Sun, Earth, and the Moon at the times of lunar and solar eclipses, and at the times of new, first-quarter, full, and lastquarter phases of the Moon. 7. Do the following: a ...
... c. List the factors that keep the Moon in orbit around Earth. d. With the aid of diagrams, explain the relative positions of the Sun, Earth, and the Moon at the times of lunar and solar eclipses, and at the times of new, first-quarter, full, and lastquarter phases of the Moon. 7. Do the following: a ...
Carbon Stars - The OzSky Star Safari
... – Near the end of their life, they become a red giant star. – Then they leave the initial Red Giant phase via the Horizontal Branch as the helium ignites to form carbon. – On the Asymptotic Giant Branch, they become Carbon Stars and Red Giants again and eventually blow off their ...
... – Near the end of their life, they become a red giant star. – Then they leave the initial Red Giant phase via the Horizontal Branch as the helium ignites to form carbon. – On the Asymptotic Giant Branch, they become Carbon Stars and Red Giants again and eventually blow off their ...
PRESS 2001 Project Report - Hong Kong University of Science and
... Half or more of all stars in the universe are in orbit around another star or stars. In most of these multiple-star systems, there is a type of system which consists of two stars only, known as a binary star system, whose components may be separated by a large fraction of a light year, or they may b ...
... Half or more of all stars in the universe are in orbit around another star or stars. In most of these multiple-star systems, there is a type of system which consists of two stars only, known as a binary star system, whose components may be separated by a large fraction of a light year, or they may b ...
Discovery of extremely lead-rich subdwarfs: does heavy metal signal
... absorption line at 4049.8 Å and weaker lines at 3962.5 and 4496.1 Å. These have been identified from the National Institute of Standards and Technology (NIST) atomic data base to be due to Pb IV (Kramida et al. 2012). HE 1256−2738 also shows the Pb IV lines at 4049.8 and 3962.5 Å; 4496.1 Å is too we ...
... absorption line at 4049.8 Å and weaker lines at 3962.5 and 4496.1 Å. These have been identified from the National Institute of Standards and Technology (NIST) atomic data base to be due to Pb IV (Kramida et al. 2012). HE 1256−2738 also shows the Pb IV lines at 4049.8 and 3962.5 Å; 4496.1 Å is too we ...
81 KB - CSIRO Publishing
... II. Contains Stars An additional key requirement is that a galaxy be a stellar system, (i.e. it must include some stars). In the case of recently discovered ultra-faint dwarf spheroidal galaxies, the number of stars inferred can be as low as a few hundred. It is possible, and indeed predicted by som ...
... II. Contains Stars An additional key requirement is that a galaxy be a stellar system, (i.e. it must include some stars). In the case of recently discovered ultra-faint dwarf spheroidal galaxies, the number of stars inferred can be as low as a few hundred. It is possible, and indeed predicted by som ...
Document
... Blazars are powerful gamma-ray sources. The most powerful of them have equivalent isotropic luminosity 1049 erg/s. Collimation θ2/2 ~ 10-2 – 10-3. θ – jet opening angle. EGRET detected 66 (+27) sources of this type. New breakthrough is expected after the launch of GLAST. Several sources have been de ...
... Blazars are powerful gamma-ray sources. The most powerful of them have equivalent isotropic luminosity 1049 erg/s. Collimation θ2/2 ~ 10-2 – 10-3. θ – jet opening angle. EGRET detected 66 (+27) sources of this type. New breakthrough is expected after the launch of GLAST. Several sources have been de ...
AGN jets
... Blazars are powerful gamma-ray sources. The most powerful of them have equivalent isotropic luminosity 1049 erg/s. Collimation θ2/2 ~ 10-2 – 10-3. θ – jet opening angle. EGRET detected 66 (+27) sources of this type. New breakthrough is expected after the launch of GLAST. Several sources have been de ...
... Blazars are powerful gamma-ray sources. The most powerful of them have equivalent isotropic luminosity 1049 erg/s. Collimation θ2/2 ~ 10-2 – 10-3. θ – jet opening angle. EGRET detected 66 (+27) sources of this type. New breakthrough is expected after the launch of GLAST. Several sources have been de ...
International Ultraviolet Explorer
The International Ultraviolet Explorer (IUE) was an astronomical observatory satellite primarily designed to take ultraviolet spectra. The satellite was a collaborative project between NASA, the UK Science Research Council and the European Space Agency (ESA). The mission was first proposed in early 1964, by a group of scientists in the United Kingdom, and was launched on January 26, 1978 aboard a NASA Delta rocket. The mission lifetime was initially set for 3 years, but in the end it lasted almost 18 years, with the satellite being shut down in 1996. The switch-off occurred for financial reasons, while the telescope was still functioning at near original efficiency.It was the first space observatory to be operated in real time by astronomers who visited the groundstations in the United States and Europe. Astronomers made over 104,000 observations using the IUE, of objects ranging from solar system bodies to distant quasars. Among the significant scientific results from IUE data were the first large scale studies of stellar winds, accurate measurements of the way interstellar dust absorbs light, and measurements of the supernova SN1987A which showed that it defied stellar evolution theories as they then stood. When the mission ended, it was considered the most successful astronomical satellite ever.