German LOFAR - LOFAR at MPA
... maintenance are low. The radio waves are sampled digitally, the signal is transmitted over large baselines to a high-performance computing facility, where the radio images are synthesized in real time. This innovative design based on digital beam-forming will allow to point the telescope simultaneou ...
... maintenance are low. The radio waves are sampled digitally, the signal is transmitted over large baselines to a high-performance computing facility, where the radio images are synthesized in real time. This innovative design based on digital beam-forming will allow to point the telescope simultaneou ...
Stellar Populations of Dwarf Elliptical Galaxies: UBVRI Photometry
... of low luminosity galaxies. At the same time, Virgo is dynamically young (e.g., Tully & Shaya 1984) and contains several substructural units (Binggeli et al. 1987); thus, with a well selected sample it may be possible to study the evolution of dwarf elliptical galaxies within the cluster itself. Rec ...
... of low luminosity galaxies. At the same time, Virgo is dynamically young (e.g., Tully & Shaya 1984) and contains several substructural units (Binggeli et al. 1987); thus, with a well selected sample it may be possible to study the evolution of dwarf elliptical galaxies within the cluster itself. Rec ...
Pluto - Maples Elementary School
... about Pluto!! We hope you enjoyed it and Pluto is now your favorite planet!! We are now considering that you know more Pluto then you ever have!!! Our favorite Dwarf Planet is Pluto!!! ...
... about Pluto!! We hope you enjoyed it and Pluto is now your favorite planet!! We are now considering that you know more Pluto then you ever have!!! Our favorite Dwarf Planet is Pluto!!! ...
Theory of Pixel Lensing
... Suppose a series of measurements F (ti) are made at uniform intervals which are short compared to !e1 for a duration long compared to ! 1. And suppose that each measurement has the same noise F . Then the total signal to noise of the P ...
... Suppose a series of measurements F (ti) are made at uniform intervals which are short compared to !e1 for a duration long compared to ! 1. And suppose that each measurement has the same noise F . Then the total signal to noise of the P ...
The Role of Radioactive Isotopes in Astrophysics
... had been created in previous massive stars, thereby seeding the interstellar matter with primary elements. These seed nuclei are required in order that secondary nuclei be produced from them in stars. He emphasized especially 14 N, 18 O, 19 F and 22 Ne in that regard, each of which depends on initia ...
... had been created in previous massive stars, thereby seeding the interstellar matter with primary elements. These seed nuclei are required in order that secondary nuclei be produced from them in stars. He emphasized especially 14 N, 18 O, 19 F and 22 Ne in that regard, each of which depends on initia ...
MPA Anniversary Brochure - Max Planck Institute for Astrophysics
... most MPA graduate students, this is the time since their parents were born, thus most of history. On the other hand, the institute’s anniversary party included a number of scientists who could recall the founding of the MPA and the hopes that went with it. Over five decades most people develop from ...
... most MPA graduate students, this is the time since their parents were born, thus most of history. On the other hand, the institute’s anniversary party included a number of scientists who could recall the founding of the MPA and the hopes that went with it. Over five decades most people develop from ...
docx file
... Another separate naked-eye comet, Comet Linear (T7), is also as bright as third magnitude and should remain bright into June. APOD: 2000 July 27 - Tails Of Comet LINEAR Explanation: Comet C/1999 S4 LINEAR is only one of many comets discovered with the Lincoln Near Earth Asteroid Research (LINEAR) te ...
... Another separate naked-eye comet, Comet Linear (T7), is also as bright as third magnitude and should remain bright into June. APOD: 2000 July 27 - Tails Of Comet LINEAR Explanation: Comet C/1999 S4 LINEAR is only one of many comets discovered with the Lincoln Near Earth Asteroid Research (LINEAR) te ...
DUSTiNGS III: Distribution of Intermediate
... such a process would require the acquisition of increasingly low-mass haloes. While such a scenario is unlikely, tidal disturbances and interactions do impact the stellar distributions of a dwarf galaxy. The relative importance of internal versus external processes is unclear. A key test of the diff ...
... such a process would require the acquisition of increasingly low-mass haloes. While such a scenario is unlikely, tidal disturbances and interactions do impact the stellar distributions of a dwarf galaxy. The relative importance of internal versus external processes is unclear. A key test of the diff ...
Development of pixel detectors with integrated
... End view of tracks registered by the STAR TPC in a heavy-ion collision ...
... End view of tracks registered by the STAR TPC in a heavy-ion collision ...
COMET 17/P Holmes - The O`Neal Web Site
... • At this time he says: “The nucleus had developed clearly, and was very noticeable as a small ill-defined star.” • With the 36-inch, which he was able to use later, he made the following measurements, which we reproduce here, as they are unique in showing the increase in diameter of the comet due e ...
... • At this time he says: “The nucleus had developed clearly, and was very noticeable as a small ill-defined star.” • With the 36-inch, which he was able to use later, he made the following measurements, which we reproduce here, as they are unique in showing the increase in diameter of the comet due e ...
PowerPoint - Herschel Space Observatory
... – The shape of the spectrum is always the same, but the peak wavelength changes with temperature. – But not all objects are black bodies. – Atoms, molecules and electrons emit radiation with a different ...
... – The shape of the spectrum is always the same, but the peak wavelength changes with temperature. – But not all objects are black bodies. – Atoms, molecules and electrons emit radiation with a different ...
The size of AB Doradus A from VLTI/AMBER interferometry⋆
... Our radius measurement of AB Dor A is in reasonable agreement with previous estimates based on other techniques, i.e. techniques based on the projected equatorial velocity (∼1 R ; Maggio et al. 2000), and techniques based on the empirical Barnes et al. (1978) relationship between radius and V − R c ...
... Our radius measurement of AB Dor A is in reasonable agreement with previous estimates based on other techniques, i.e. techniques based on the projected equatorial velocity (∼1 R ; Maggio et al. 2000), and techniques based on the empirical Barnes et al. (1978) relationship between radius and V − R c ...
A spectroscopic investigation of the O-type star - ORBi
... evidence of binarity is found can never be definitely considered as single. Even if no RV shift is detected, the system could be seen under a particular orientation, have a very long period or perhaps a high eccentricity, thereby making the RV variations not significant over a long timescale. We per ...
... evidence of binarity is found can never be definitely considered as single. Even if no RV shift is detected, the system could be seen under a particular orientation, have a very long period or perhaps a high eccentricity, thereby making the RV variations not significant over a long timescale. We per ...
Observations of Jets and Outflows from Young Stars
... in jets. Upgrades at the VLA, and a new generation of mminterferometers such as the SMA on Mauna Kea are producing stunning arc-second resolution images of molecular jets, and have enabled the detection of many highly embedded sources invisible at shorter wavelengths (Section 4). ...
... in jets. Upgrades at the VLA, and a new generation of mminterferometers such as the SMA on Mauna Kea are producing stunning arc-second resolution images of molecular jets, and have enabled the detection of many highly embedded sources invisible at shorter wavelengths (Section 4). ...
Discovery of a Dusty Ring in the Coalsack - Harvard
... center of the globule. The receiver was equipped with an SIS mixer which produced a system temperature of approximately 200 K. The half-power beamwidth at the observing frequency was approximately 24 arc sec. An AOS spectrometer provided a velocity resolution of 0.06 km sec−1 . A series of five minu ...
... center of the globule. The receiver was equipped with an SIS mixer which produced a system temperature of approximately 200 K. The half-power beamwidth at the observing frequency was approximately 24 arc sec. An AOS spectrometer provided a velocity resolution of 0.06 km sec−1 . A series of five minu ...
Aalborg Universitet Spacecraft Attitude Determination with Earth Albedo Corrected Sun Sensor Measurements
... attitude determination. Since the recent development of the CubeSat pico-satellite concept, numerous universities have initiated student satellite projects. The minimal size of the CubeSats limits the hardware configuration, which, for an attitude determination point-of-view, only allows simple atti ...
... attitude determination. Since the recent development of the CubeSat pico-satellite concept, numerous universities have initiated student satellite projects. The minimal size of the CubeSats limits the hardware configuration, which, for an attitude determination point-of-view, only allows simple atti ...
Ages of young stars
... individual objects. A reliable age scale is established above 20 Myr from measurement of the Lithium Depletion Boundary (LDB) in young clusters, and consistency is shown between these ages and those from the upper main sequence and the main sequence turn-off – if modest core convection and rotation ...
... individual objects. A reliable age scale is established above 20 Myr from measurement of the Lithium Depletion Boundary (LDB) in young clusters, and consistency is shown between these ages and those from the upper main sequence and the main sequence turn-off – if modest core convection and rotation ...
The physics of star formation
... (1992), Hartmann (1998), and Sigalotti and Klapp (2001). A review with emphasis on the role of turbulence has been given by Mac Low and Klessen (2003), and reviews focusing on the larger-scale aspects of star formation have been given by Tenorio-Tagle and Bodenheimer (1988), Elmegreen (1992), Larson ...
... (1992), Hartmann (1998), and Sigalotti and Klapp (2001). A review with emphasis on the role of turbulence has been given by Mac Low and Klessen (2003), and reviews focusing on the larger-scale aspects of star formation have been given by Tenorio-Tagle and Bodenheimer (1988), Elmegreen (1992), Larson ...
Ages of Young Stars
... models, but depend on a number of uncertain physical ingredients including the amount of convective core overshooting and the stellar rotation rate (e.g., Maeder and Meynet, 1989; Meynet and Maeder, 2000, and see section 4.1). UMS/MSTO ages are listed, where available, in Table 1 using models with n ...
... models, but depend on a number of uncertain physical ingredients including the amount of convective core overshooting and the stellar rotation rate (e.g., Maeder and Meynet, 1989; Meynet and Maeder, 2000, and see section 4.1). UMS/MSTO ages are listed, where available, in Table 1 using models with n ...
Quantitative constraints on starburst cycles in galaxies with stellar
... libraries contain models with burst fractions very close to zero, which are essentially identical to the models in the continuous library, so the new minimum χ2 is guaranteed to be equal to or smaller than the old one. If the new χ2min /Nd lies in the range 2.37-6.25, the probability that the model ...
... libraries contain models with burst fractions very close to zero, which are essentially identical to the models in the continuous library, so the new minimum χ2 is guaranteed to be equal to or smaller than the old one. If the new χ2min /Nd lies in the range 2.37-6.25, the probability that the model ...
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.