![The evolution of Supernova 1987A probed by Hubble Space](http://s1.studyres.com/store/data/015802764_1-f1eb61ef76957d35e55fee5b32657f07-300x300.png)
The evolution of Supernova 1987A probed by Hubble Space
... Chinese astronomers made notes of a ”guest star” that was visible for eight months. This is the first known observation of a supernova. Historical descriptions of supernovae are rare, and before the beginning of the 20th century only a few different supernova events have been recorded. Even though s ...
... Chinese astronomers made notes of a ”guest star” that was visible for eight months. This is the first known observation of a supernova. Historical descriptions of supernovae are rare, and before the beginning of the 20th century only a few different supernova events have been recorded. Even though s ...
probing quasar environments with tunable filter
... formation in the universe and the impact of active galaxies on their environment. The Taurus Tunable Filter (TTF) on the Anglo-Australian Telescope provides a powerful and flexible method of performing surveys for line-emitting objects, enabling nearmonochromatic imaging over a narrow bandpass at wa ...
... formation in the universe and the impact of active galaxies on their environment. The Taurus Tunable Filter (TTF) on the Anglo-Australian Telescope provides a powerful and flexible method of performing surveys for line-emitting objects, enabling nearmonochromatic imaging over a narrow bandpass at wa ...
PPT - University of Waterloo
... Formation of stars & planets and physics of the interstellar medium Tracers of structure, kinematics, chemistry in star forming regions Circulation/enrichment of the interstellar medium Astrochemistry – WATER Detailed studies of nearby resolvable galaxies ...
... Formation of stars & planets and physics of the interstellar medium Tracers of structure, kinematics, chemistry in star forming regions Circulation/enrichment of the interstellar medium Astrochemistry – WATER Detailed studies of nearby resolvable galaxies ...
An Adaptive Secondary Mirror Demonstrator: Construction and
... telescope as a system will fail if the ASM control fails. Moreover, when near Zenith-pointing, the secondary mirror is directly over the telescope primary, which is therefore potentially vulnerable to any catastrophic stress induced fracture of the secondary. Therefore, there are compelling advantag ...
... telescope as a system will fail if the ASM control fails. Moreover, when near Zenith-pointing, the secondary mirror is directly over the telescope primary, which is therefore potentially vulnerable to any catastrophic stress induced fracture of the secondary. Therefore, there are compelling advantag ...
offprint
... of He 6678 assuming nrp, while an (ad-hoc) model based on variable local linewidth (e.g. by non-uniform micro-turbulence across the stellar surface) could reproduce the He 6678 at least in principle. But Maintz et al. (2000), exploring a larger parameter space than considered by Balona et al. (1 ...
... of He 6678 assuming nrp, while an (ad-hoc) model based on variable local linewidth (e.g. by non-uniform micro-turbulence across the stellar surface) could reproduce the He 6678 at least in principle. But Maintz et al. (2000), exploring a larger parameter space than considered by Balona et al. (1 ...
Properties of Wolf-Rayet Stars - Paul Crowther, University of Sheffield
... The wavelength of the blue edge of saturated P Cygni absorption profiles provides a measure of the asymptotic wind velocity, from which accurate wind velocities, v∞ , of WR stars can readily be obtained (e.g. Willis et al. 2004). Alternatively, optical and near-IR He i P Cygni profiles or mid-IR fin ...
... The wavelength of the blue edge of saturated P Cygni absorption profiles provides a measure of the asymptotic wind velocity, from which accurate wind velocities, v∞ , of WR stars can readily be obtained (e.g. Willis et al. 2004). Alternatively, optical and near-IR He i P Cygni profiles or mid-IR fin ...
Mass loss of massive stars near the Eddington luminosity by core
... the gravitational force and the radiation pressure are balanced. Thus, if the gravitational force is suddenly reduced, the radiation pressure gets higher than the gravitational force, initiating the stellar mass loss. The Eddington luminosity is reduced linearly as neutrinos escape (Eq. (3)). The re ...
... the gravitational force and the radiation pressure are balanced. Thus, if the gravitational force is suddenly reduced, the radiation pressure gets higher than the gravitational force, initiating the stellar mass loss. The Eddington luminosity is reduced linearly as neutrinos escape (Eq. (3)). The re ...
PHY216_lect3_2014_sub
... Universal Time is the name by which Greenwich Mean Time (GMT) became known for scientific purposes in 1928. UT is based on the daily rotation of the Earth. However, the Earth’s rotation is somewhat irregular and can therefore no longer be used as a precise system of time. Versions of UT: UT1: • The ...
... Universal Time is the name by which Greenwich Mean Time (GMT) became known for scientific purposes in 1928. UT is based on the daily rotation of the Earth. However, the Earth’s rotation is somewhat irregular and can therefore no longer be used as a precise system of time. Versions of UT: UT1: • The ...
Powerpoint file as used in presentation
... - 3 reflecting and 3 transmitting surfaces including VLTI pickoff and PBS surface ...
... - 3 reflecting and 3 transmitting surfaces including VLTI pickoff and PBS surface ...
asteroid wise - Lawrence Hall of Science
... Asteroids that are made of rock and/or metal are not the only menace. Comets are bodies of ice that can go crashing into planets as dramatically seen in 1994 when the large comet ShoemakerLevy 9 fragmented and created huge explosions when it struck the planet Jupiter at more than 20 different sites. ...
... Asteroids that are made of rock and/or metal are not the only menace. Comets are bodies of ice that can go crashing into planets as dramatically seen in 1994 when the large comet ShoemakerLevy 9 fragmented and created huge explosions when it struck the planet Jupiter at more than 20 different sites. ...
Life - Anatomy Atlases
... • At time of Sputnik's launch in 1957, Joshua Lederberg realized that if humans were about to travel into space, they could spread terrestrial organisms to other planets + bring alien organisms back to Earth • Man was set to destroy indigenous life-forms across solar system or ourselves - a "cosmic ...
... • At time of Sputnik's launch in 1957, Joshua Lederberg realized that if humans were about to travel into space, they could spread terrestrial organisms to other planets + bring alien organisms back to Earth • Man was set to destroy indigenous life-forms across solar system or ourselves - a "cosmic ...
A Practical Guide to Exoplanet Observing
... The following are several best practices for capturing exoplanet transits that should result in a better fit of the data collected: 1. Image scale: The image scale (i.e., arc-seconds per pixel) of the imaging system, after any binning of the CCD camera is considered, should be such that the full wid ...
... The following are several best practices for capturing exoplanet transits that should result in a better fit of the data collected: 1. Image scale: The image scale (i.e., arc-seconds per pixel) of the imaging system, after any binning of the CCD camera is considered, should be such that the full wid ...
Diapositiva 1
... At the moment, the quality of the observational data is insufficient to pinpoint the precise origin of the star within the spiral arm (cluster birthplace?) Gaia parallax accuracy ~10 as (G~11), 3 % accuracy in the relative parallax Was the star originated some ≈15 Myr ago, in the Crux-Scutum spiral ...
... At the moment, the quality of the observational data is insufficient to pinpoint the precise origin of the star within the spiral arm (cluster birthplace?) Gaia parallax accuracy ~10 as (G~11), 3 % accuracy in the relative parallax Was the star originated some ≈15 Myr ago, in the Crux-Scutum spiral ...
Open clusters and associations in the Gaia era
... This methodology revolution is the consequence of the ever larger amount of more accurate and sensitive data with broader spatial, temporal and wavelength coverage that is becoming available. A good way to illustrate this is to look at recent studies made on the well-known Pleiades cluster. While Mo ...
... This methodology revolution is the consequence of the ever larger amount of more accurate and sensitive data with broader spatial, temporal and wavelength coverage that is becoming available. A good way to illustrate this is to look at recent studies made on the well-known Pleiades cluster. While Mo ...
The first carbon-enhanced metal-poor star found in the Sculptor
... spheroidal galaxies around the Milky Way. Here we present detailed abundances from ESO VLT/UVES high-resolution spectroscopy for ET0097, the first CEMP star found in the Sculptor dwarf spheroidal, which is one of the best studied dwarf galaxies in the Local Group. This star has [Fe/H] = −2.03 ± 0.10 ...
... spheroidal galaxies around the Milky Way. Here we present detailed abundances from ESO VLT/UVES high-resolution spectroscopy for ET0097, the first CEMP star found in the Sculptor dwarf spheroidal, which is one of the best studied dwarf galaxies in the Local Group. This star has [Fe/H] = −2.03 ± 0.10 ...
Do We Know of Any Maunder Minimum Stars?
... (Perryman et al. 1997; Perryman & ESA 1997). To increase the confidence in the results here, only those WMBV stars with more than two Keck observations are used in this work. The bulk of the ∼ 1000 stars in WMBV are currently being monitored for radial velocity variations and are typically bright, w ...
... (Perryman et al. 1997; Perryman & ESA 1997). To increase the confidence in the results here, only those WMBV stars with more than two Keck observations are used in this work. The bulk of the ∼ 1000 stars in WMBV are currently being monitored for radial velocity variations and are typically bright, w ...
VLT identifications in the Chandra/XMM
... a Seyfert-2 galaxy with heavy X-ray absorption and an AGN-type luminosity. The latter spectrum is characteristic for the bulk of the detected galaxies, which show either no or very faint high excitation lines indicating the AGN nature of the object, so that we have to resort to a combination of opti ...
... a Seyfert-2 galaxy with heavy X-ray absorption and an AGN-type luminosity. The latter spectrum is characteristic for the bulk of the detected galaxies, which show either no or very faint high excitation lines indicating the AGN nature of the object, so that we have to resort to a combination of opti ...
The Celestial Origin of Atoms
... intact. They are certainly not so naive as to believe that the stars have delivered up all their secrets. The most ancient stars, those born before the Galaxy had assumed its present form, have now become a subject of intense interest. The next goal on the distant horizon is a complete picture of ch ...
... intact. They are certainly not so naive as to believe that the stars have delivered up all their secrets. The most ancient stars, those born before the Galaxy had assumed its present form, have now become a subject of intense interest. The next goal on the distant horizon is a complete picture of ch ...
A1 F2015 Seasonal.key
... 9)Label the directions north, south, east and west on Figure 1. Check your answer with another group. ...
... 9)Label the directions north, south, east and west on Figure 1. Check your answer with another group. ...
ABSTRACT Exoplanet Habitability and an Analysis of Gliese 436 b
... methane.13 As with the first class of biomarkers though, many false positives in an exoplanet’s atmosphere can occur due to the fact that methane can be produced through non-biological means.13 The third class of biomarkers offers the most hope for a way to detect life by spectroscopy. Molecules suc ...
... methane.13 As with the first class of biomarkers though, many false positives in an exoplanet’s atmosphere can occur due to the fact that methane can be produced through non-biological means.13 The third class of biomarkers offers the most hope for a way to detect life by spectroscopy. Molecules suc ...
Wolf-Rayet Stars
... (WNL). Similarly WC4-6 stars are designated as WCE, while WC7-9 stars are designated as WCL. Although there are important exceptions, WNE stars generally show no evidence for H emission while H emission is present in WNL stars. The distribution of Population I W-R stars, which are discussed in this ...
... (WNL). Similarly WC4-6 stars are designated as WCE, while WC7-9 stars are designated as WCL. Although there are important exceptions, WNE stars generally show no evidence for H emission while H emission is present in WNL stars. The distribution of Population I W-R stars, which are discussed in this ...
1. Uranus and Neptune
... Sun. Then came the discovery of Neptune, the eighth planet. But something was still wrong with the orbit of Uranus. Could yest another planet lurk unseen in the distant reaches of the Solar System, and could such a planet be affecting the orbit of Uranus? The first part of the question was answered ...
... Sun. Then came the discovery of Neptune, the eighth planet. But something was still wrong with the orbit of Uranus. Could yest another planet lurk unseen in the distant reaches of the Solar System, and could such a planet be affecting the orbit of Uranus? The first part of the question was answered ...
International Ultraviolet Explorer
![](https://en.wikipedia.org/wiki/Special:FilePath/International_Ultraviolet_Explorer.gif?width=300)
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.