PPT presentation
... Contamination of the PN samples The contamination increases with distance to the galaxy. It is negligible for distances < 10 Mpc, as we just saw. At the distance of the Virgo cluster the luminosity function of the contaminants imitates the PNLF of a low-surfacedensity PN population at that distance ...
... Contamination of the PN samples The contamination increases with distance to the galaxy. It is negligible for distances < 10 Mpc, as we just saw. At the distance of the Virgo cluster the luminosity function of the contaminants imitates the PNLF of a low-surfacedensity PN population at that distance ...
Teaching Tips Table of Contents - Hubble Deep Field
... 11. How “deep” can these surveys eventually go? Is there a limit? ............................... 41 12. The Hubble Deep Field opened new cosmic territory for exploration. What other deep-sky surveys did Hubble participate in? ............................................................... 41 13. Wh ...
... 11. How “deep” can these surveys eventually go? Is there a limit? ............................... 41 12. The Hubble Deep Field opened new cosmic territory for exploration. What other deep-sky surveys did Hubble participate in? ............................................................... 41 13. Wh ...
Test Ch. 27 Multiple Choice Identify the choice that best completes
... 25. In the last stage of stellar evolution following a supernova, stars too massive to form neutron stars may form a A. black dwarf. B. red supergiant. C. white dwarf. D. black hole. 26. In which stage of stellar evolution does combined hydrogen fusion and helium fusion cause a star’s outer shell to ...
... 25. In the last stage of stellar evolution following a supernova, stars too massive to form neutron stars may form a A. black dwarf. B. red supergiant. C. white dwarf. D. black hole. 26. In which stage of stellar evolution does combined hydrogen fusion and helium fusion cause a star’s outer shell to ...
Ground-Conjugate Wide Field Adaptive Optics for the ELTs F. Rigaut
... loss on Ritchey-Chretien design, the secondary being conjugated below ground level. This performance loss remains to be evaluated. The primary mirror, or a prime focus corrector, could be used for the purpose of ground layer compensation. ...
... loss on Ritchey-Chretien design, the secondary being conjugated below ground level. This performance loss remains to be evaluated. The primary mirror, or a prime focus corrector, could be used for the purpose of ground layer compensation. ...
1 - Piscataway High School
... stars and the planets that circle them. The deaths of stars are part of a great cycle of stellar birth and death that includes your sun, your planet, and you. ...
... stars and the planets that circle them. The deaths of stars are part of a great cycle of stellar birth and death that includes your sun, your planet, and you. ...
GALEX and Star Formation
... massive stars, hot, luminous, and short-lived, are the unambiguous tracers of star formation. They are luminous enough that they can be seen in distant galaxies. They evolve on fast timescales (.10 Myrs for Otype stars), therefore they also trace the original spatial structure of the star-formation ...
... massive stars, hot, luminous, and short-lived, are the unambiguous tracers of star formation. They are luminous enough that they can be seen in distant galaxies. They evolve on fast timescales (.10 Myrs for Otype stars), therefore they also trace the original spatial structure of the star-formation ...
THE ROTATION OF THE SUN
... Moon) is completely illuminated (by the sunlight), it is “full”: the phase is 100%. When it is half illuminated, its phase equals to 50%. Similar to the Moon, the phases of Venus (or Mercury) change all the time, depending on where the body is placed relatively to the Earth and Sun (see Figure 1). I ...
... Moon) is completely illuminated (by the sunlight), it is “full”: the phase is 100%. When it is half illuminated, its phase equals to 50%. Similar to the Moon, the phases of Venus (or Mercury) change all the time, depending on where the body is placed relatively to the Earth and Sun (see Figure 1). I ...
Hubble Deep Field Academy -- Overview
... description, the concepts covered, prerequisites, and the target audience. Science Background: Provides information about the science behind the activity. It clarifies important concepts used in the activity and contains a message from the scientist who worked with the team to develop it. Lesson Pla ...
... description, the concepts covered, prerequisites, and the target audience. Science Background: Provides information about the science behind the activity. It clarifies important concepts used in the activity and contains a message from the scientist who worked with the team to develop it. Lesson Pla ...
Radio observations of the planetary nebula around the OH/IR Star
... We present radio observations of the unique, recently formed, planetary nebula (PN) associated with a very long-period OH/IR variable star V1018 Sco that is unequivocally still in its asymptotic giant branch phase. Two regions within the optical nebula are clearly detected in nonthermal radio contin ...
... We present radio observations of the unique, recently formed, planetary nebula (PN) associated with a very long-period OH/IR variable star V1018 Sco that is unequivocally still in its asymptotic giant branch phase. Two regions within the optical nebula are clearly detected in nonthermal radio contin ...
A Radial Velocity Search for Extra-Solar Planets Using an Iodine
... the ends of a quartz tube 10 cm in length. A feed-through tube 1 cm in diameter was then fused through the cylindrical walls near the centre of the cell and the free end of this tube was attached to a glass manifold. At one end of the manifold was a sample tube containing solid iodine and at the oth ...
... the ends of a quartz tube 10 cm in length. A feed-through tube 1 cm in diameter was then fused through the cylindrical walls near the centre of the cell and the free end of this tube was attached to a glass manifold. At one end of the manifold was a sample tube containing solid iodine and at the oth ...
Galileo
... Galileo observed the Sun through his telescope and saw that the Sun had dark patches on it (what we now call sunspots). He also observed the motion of the sunspots indicating that the Sun was rotating on an axis. More evidence of the Copernican heliocentric model of the solar system. ...
... Galileo observed the Sun through his telescope and saw that the Sun had dark patches on it (what we now call sunspots). He also observed the motion of the sunspots indicating that the Sun was rotating on an axis. More evidence of the Copernican heliocentric model of the solar system. ...
... evidence for more than 100 galactic sources, a small number of which have been identified with pulsars and possibly with supernova remnants. The bulk of the sources away from the plane are extragalactic and have been identified with active galactic nuclei (AGNs), almost all of which are blazars. Som ...
Hot DQ White Dwarfs: Something Different
... than the age of the disk of our Galaxy and are thus possible only from binary evolution or if the mass loss in the red giant phase is extremely large, Kalirai et al. 2007). Direct observation of the core is unfortunately not possible since it is surrounded by a thin and opaque layer of helium (and h ...
... than the age of the disk of our Galaxy and are thus possible only from binary evolution or if the mass loss in the red giant phase is extremely large, Kalirai et al. 2007). Direct observation of the core is unfortunately not possible since it is surrounded by a thin and opaque layer of helium (and h ...
Magnetic cycles of Sun-like stars with different levels of coronal and
... of stars of the HK-project. It can be noted that the Sun is at the place with absolutely lowest level of coronal activity among Sun-like HK-project stars. One can also note that solar photometric radiation changes very little in the activity cycle, less than 0.1 %. The simultaneous monitoring of pho ...
... of stars of the HK-project. It can be noted that the Sun is at the place with absolutely lowest level of coronal activity among Sun-like HK-project stars. One can also note that solar photometric radiation changes very little in the activity cycle, less than 0.1 %. The simultaneous monitoring of pho ...
CFRP composite optical telescope assembly for the 1m ULTRA project
... The optics for this OTA is a classical Cassegrain set. The primary mirror is a 1 m diameter f/3 parabola. The final f/ ratio is 7.6 with the focus located 530 mm behind the primary vertex. The secondary mirror is 343 mm in diameter. The OTA must support an instrument package that will be located beh ...
... The optics for this OTA is a classical Cassegrain set. The primary mirror is a 1 m diameter f/3 parabola. The final f/ ratio is 7.6 with the focus located 530 mm behind the primary vertex. The secondary mirror is 343 mm in diameter. The OTA must support an instrument package that will be located beh ...
Asteroid Rotation Periods
... Early brightness measurements of asteroids revealed both periodic timedependent variations and a phenomenon called the opposition effect (this is the sudden rise of the asteroid’s brightness when it’s very close to opposition). However, from photometric measurements in the visual wavelengths alone, ...
... Early brightness measurements of asteroids revealed both periodic timedependent variations and a phenomenon called the opposition effect (this is the sudden rise of the asteroid’s brightness when it’s very close to opposition). However, from photometric measurements in the visual wavelengths alone, ...
low-res - Communicating Astronomy with the Public Journal
... provided by the interviewers. The authors conducted eleven face-to-face interviews in person (one interview was conducted with two persons who are close collaborators3) in Munich, Baltimore, New York and Boston and one interview was conducted by telephone. Each interview lasted approximately one hou ...
... provided by the interviewers. The authors conducted eleven face-to-face interviews in person (one interview was conducted with two persons who are close collaborators3) in Munich, Baltimore, New York and Boston and one interview was conducted by telephone. Each interview lasted approximately one hou ...
Chromospherically young, kinematically old stars
... W × V diagram, and vice versa. We expect that CYKOS showing high velocities in more than one component are really peculiar objects, and not just stars having a component velocity in the tail of the distribution. Some CYKOS also appear clearly in an age–velocity diagram, so that, in principle, this d ...
... W × V diagram, and vice versa. We expect that CYKOS showing high velocities in more than one component are really peculiar objects, and not just stars having a component velocity in the tail of the distribution. Some CYKOS also appear clearly in an age–velocity diagram, so that, in principle, this d ...
Labeling the HR Diagram - Mastering Physics Answers
... We can use the inverse square law for light to calculate the star’s luminosity from its apparent brightness and distance. However, this calculated value will be accurate only if there is no absorption or scattering of the light on its way from the star to us. (If there is interstellar dust between u ...
... We can use the inverse square law for light to calculate the star’s luminosity from its apparent brightness and distance. However, this calculated value will be accurate only if there is no absorption or scattering of the light on its way from the star to us. (If there is interstellar dust between u ...
Introduction to SkyMaker and the STEP 1 simulations
... What is skymaker? Skymaker makes realistic sky simulations with the main emphasis on reproducing observational effects: - telescope aperture - Optical defects (e.g. astigmatism, coma, tracking errors) - detector and sky characteristics (gain, sky brightness, saturation effects) - halos around bright ...
... What is skymaker? Skymaker makes realistic sky simulations with the main emphasis on reproducing observational effects: - telescope aperture - Optical defects (e.g. astigmatism, coma, tracking errors) - detector and sky characteristics (gain, sky brightness, saturation effects) - halos around bright ...
IFAS Novice Handbook - Indiana Astronomical Society
... proximity to normal stars when they pull matter away from their visible neighbours. Strong sources of X rays in our galaxy and beyond may also indicate the presence of black holes. Recent evidence suggests that black holes are so common that they probably exist at the core of nearly all galaxies. Co ...
... proximity to normal stars when they pull matter away from their visible neighbours. Strong sources of X rays in our galaxy and beyond may also indicate the presence of black holes. Recent evidence suggests that black holes are so common that they probably exist at the core of nearly all galaxies. Co ...
WAVEFRONT SENSOR FOR THE GAIA MISSION
... ensuring low chromaticity (wavelength range to be considered is 450 to 900 nm). Optical simulations showed that in order to reach all requirements with a refractive element, that element would consist of 4 different types of glass (due to the wavelength range 450-900 nm), which is unnecessary comple ...
... ensuring low chromaticity (wavelength range to be considered is 450 to 900 nm). Optical simulations showed that in order to reach all requirements with a refractive element, that element would consist of 4 different types of glass (due to the wavelength range 450-900 nm), which is unnecessary comple ...
Section 1.2 Astrometric Data
... parsec is given by 1000 / π , where π is expressed in mas. The common reference epoch used throughout the catalogue is T0 = J1991.25(TT) (see Section 1.2.6). The standard astrometric model, using the five astrometric parameters, was found to be adequate for the majority of the stars, including the c ...
... parsec is given by 1000 / π , where π is expressed in mas. The common reference epoch used throughout the catalogue is T0 = J1991.25(TT) (see Section 1.2.6). The standard astrometric model, using the five astrometric parameters, was found to be adequate for the majority of the stars, including the c ...
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.