PDF - Department of Statistics
... by a set number of pixels, at set intervals of time. The “star trail” would then resemble a zipper, with clusters of counts at spaced intervals, which we refer to as holds, with the holdtime dt. Charge from successive rows of pixels will fall into the horizontal register of the CCD and may be read o ...
... by a set number of pixels, at set intervals of time. The “star trail” would then resemble a zipper, with clusters of counts at spaced intervals, which we refer to as holds, with the holdtime dt. Charge from successive rows of pixels will fall into the horizontal register of the CCD and may be read o ...
The population of young stars in Orion A: X-rays and... Ignazio Pillitteri , S. J. Wolk , L. Allen
... Through Spitzer and XMM-Newton we identify ∼ 702 PMS stars that emit in X-rays out of 1060 X-ray sources. By assuming the same fraction of X-ray detection of WTT stars and CTT stars we estimate a population of ∼ 1850 PMS stars, for an overall detection efficiency of ∼ 38% among PMS stars and a mean ...
... Through Spitzer and XMM-Newton we identify ∼ 702 PMS stars that emit in X-rays out of 1060 X-ray sources. By assuming the same fraction of X-ray detection of WTT stars and CTT stars we estimate a population of ∼ 1850 PMS stars, for an overall detection efficiency of ∼ 38% among PMS stars and a mean ...
Lecture 15a - Sierra College Astronomy Home Page
... 0.5 million years (fast robot probes, fastest biological exploration) 5 million years (slow robot probes) 50 million years (slow biological exploration) 10 billion years Instead, it would be vastly more likely that if even one other civilization EVER occurred in our galaxy, it would have had billion ...
... 0.5 million years (fast robot probes, fastest biological exploration) 5 million years (slow robot probes) 50 million years (slow biological exploration) 10 billion years Instead, it would be vastly more likely that if even one other civilization EVER occurred in our galaxy, it would have had billion ...
Chapter 14
... 19. Some X-ray novae emit bursts of energy and others do not. In addition, those with energy bursts are about 100 times as luminous as those without bursts. What type of compact objects are responsible for these two types of X-ray novae? a. Those with bursts contain black holes and those without bur ...
... 19. Some X-ray novae emit bursts of energy and others do not. In addition, those with energy bursts are about 100 times as luminous as those without bursts. What type of compact objects are responsible for these two types of X-ray novae? a. Those with bursts contain black holes and those without bur ...
Activity : Milky Way
... And recall that, even away from such clouds, the average interstellar extinction is about one magnitude per kiloparsec toward the centre of the Galaxy. For our Galaxy therefore, dust serves only to hamper visual observations to greater distances. ...
... And recall that, even away from such clouds, the average interstellar extinction is about one magnitude per kiloparsec toward the centre of the Galaxy. For our Galaxy therefore, dust serves only to hamper visual observations to greater distances. ...
July - Antelope Valley Astronomy Club
... example of this phenomenon. At a distance of 7,100 light years away in the constellation of Cassiopeia, a molecular gas cloud is actively forming stars, including the massive O-class star BD+60 2522, which itself is a magnitude +8.7 star despite its great distance and its presence in a dusty region ...
... example of this phenomenon. At a distance of 7,100 light years away in the constellation of Cassiopeia, a molecular gas cloud is actively forming stars, including the massive O-class star BD+60 2522, which itself is a magnitude +8.7 star despite its great distance and its presence in a dusty region ...
the search for object x
... Stars and galaxies show absorption spectra, though as we have seen the spectrum of a star is distinct from that of a galaxy. Thin clouds of gas heated by nearby stars show emission spectra. Some examples of these gas clouds include HII regions, like the Orion Nebula, and planetary nebulas, like the ...
... Stars and galaxies show absorption spectra, though as we have seen the spectrum of a star is distinct from that of a galaxy. Thin clouds of gas heated by nearby stars show emission spectra. Some examples of these gas clouds include HII regions, like the Orion Nebula, and planetary nebulas, like the ...
OBJXlab
... Stars and galaxies show absorption spectra, though as we have seen the spectrum of a star is distinct from that of a galaxy. Thin clouds of gas heated by nearby stars show emission spectra. Some examples of these gas clouds include HII regions, like the Orion Nebula, and planetary nebulas, like the ...
... Stars and galaxies show absorption spectra, though as we have seen the spectrum of a star is distinct from that of a galaxy. Thin clouds of gas heated by nearby stars show emission spectra. Some examples of these gas clouds include HII regions, like the Orion Nebula, and planetary nebulas, like the ...
Downloadable Full Text
... The UFD Reticulum II (Ret II) was recently discovered with Dark Energy Survey data12,13 and confirmed to be one of the most metal-poor galaxies known14. On 1-4 Oct 2015, we obtained high-resolution spectra of the nine brightest member stars in Ret II (see Table 1, Extended Data Figure 1). The abunda ...
... The UFD Reticulum II (Ret II) was recently discovered with Dark Energy Survey data12,13 and confirmed to be one of the most metal-poor galaxies known14. On 1-4 Oct 2015, we obtained high-resolution spectra of the nine brightest member stars in Ret II (see Table 1, Extended Data Figure 1). The abunda ...
mufon ufo symposium -1974
... F5V to F7V have more stars rotating slowly indicating the possibility of planets. From approximately F8 on, all main sequence stars are rotating slowly, probably indicating planets. According to Carl Sagan, F8 is the point where intelligent life would have time to emerge. So main sequence stars fro ...
... F5V to F7V have more stars rotating slowly indicating the possibility of planets. From approximately F8 on, all main sequence stars are rotating slowly, probably indicating planets. According to Carl Sagan, F8 is the point where intelligent life would have time to emerge. So main sequence stars fro ...
Starburst Galaxies Under the Microscope: High
... is the nearest major merger of two large spiral galaxies. Since the beginning of the interaction the system went through several episodes of violent star formation, of which the last one is probably still ongoing. The resulting star clusters have been studied extensively. Radio and mid-IR observatio ...
... is the nearest major merger of two large spiral galaxies. Since the beginning of the interaction the system went through several episodes of violent star formation, of which the last one is probably still ongoing. The resulting star clusters have been studied extensively. Radio and mid-IR observatio ...
![arXiv:1505.07406v1 [hep-ph] 27 May 2015](http://s1.studyres.com/store/data/007750137_1-1343a5635a0dda57ac4b2d01226e2ce5-300x300.png)
arXiv:1505.07406v1 [hep-ph] 27 May 2015
... interactions in asymmetric nuclear matter, the structure and stability of exotic nuclei, the reaction dynamics induced by rare isotopes, the nature and evolution of neutron stars, and the mechanism of supernova explosion [1–7]. The symmetry energy also plays an important role in some interesting iss ...
... interactions in asymmetric nuclear matter, the structure and stability of exotic nuclei, the reaction dynamics induced by rare isotopes, the nature and evolution of neutron stars, and the mechanism of supernova explosion [1–7]. The symmetry energy also plays an important role in some interesting iss ...
The First Stars in the Universe
... network of filaments, and the first starforming systems— small protogalaxies— would coalesce at the nodes of this network. In a similar way, the protogalaxies would then merge to form galaxies, and the galaxies would congregate into galaxy clusters. The process is ongoing: although galaxy formation ...
... network of filaments, and the first starforming systems— small protogalaxies— would coalesce at the nodes of this network. In a similar way, the protogalaxies would then merge to form galaxies, and the galaxies would congregate into galaxy clusters. The process is ongoing: although galaxy formation ...
The Probability and Effects of an Asteroid Impact with Earth
... Since most observations of d Cephei are done in normal lighting conditions, use of a comparison chart with star magnitudes adjusted for dark adaption is inappropriate. Observations near the visual limit are also more accurate than those made of bright stars using telescopes, so the ideal observatio ...
... Since most observations of d Cephei are done in normal lighting conditions, use of a comparison chart with star magnitudes adjusted for dark adaption is inappropriate. Observations near the visual limit are also more accurate than those made of bright stars using telescopes, so the ideal observatio ...
![Module 4.1 - The Scale of the Universe [slide 1] We now turn to](http://s1.studyres.com/store/data/002846843_1-9e0ec9d1a2abbbab3c0d406694bfc4e2-300x300.png)
Module 4.1 - The Scale of the Universe [slide 1] We now turn to
... [slide 12] Now, let's take a closer look to what happens when a star is pulsating. Its photosphere expands, but the temperature changes as well. So the radius changes, the temperature changes therefore, luminosity must change. If we observe stars spectroscopically, we can observe the velocity of th ...
... [slide 12] Now, let's take a closer look to what happens when a star is pulsating. Its photosphere expands, but the temperature changes as well. So the radius changes, the temperature changes therefore, luminosity must change. If we observe stars spectroscopically, we can observe the velocity of th ...
Galaxies - Stockton University
... In the Solar neighborhood, an average main-sequence star (excluding binary stars) is separated by of order 107 times its size from its nearest neighbors (1 Solar Radius vs. 1 pc). Galaxies on the other hand have sizes ranging from 1 to 100 Kpc, but are separated by of order 1 to 10 Mpc from their ne ...
... In the Solar neighborhood, an average main-sequence star (excluding binary stars) is separated by of order 107 times its size from its nearest neighbors (1 Solar Radius vs. 1 pc). Galaxies on the other hand have sizes ranging from 1 to 100 Kpc, but are separated by of order 1 to 10 Mpc from their ne ...
WHAT MAKES A STAR SO SPECIAL Abstract
... 1. The teacher introduces the physical characteristics of stars and the spectral classification to the students (you can use the information from the Introduction section as a supplement to the lesson about Star characteristics in the textbook you are using). 2. The teacher gives every student an en ...
... 1. The teacher introduces the physical characteristics of stars and the spectral classification to the students (you can use the information from the Introduction section as a supplement to the lesson about Star characteristics in the textbook you are using). 2. The teacher gives every student an en ...
Larger, high-res file, best for printing
... easy-to-find deep-sky objects. Some of them you can see even from a lightfilled city sky. Well, I guess I have to qualify that statement. Ken’s deep-sky objects can be seen from many, though not all, city locales. Xi’an, China, in July 2008 — two hours after sunrise. I was reminded of the problem la ...
... easy-to-find deep-sky objects. Some of them you can see even from a lightfilled city sky. Well, I guess I have to qualify that statement. Ken’s deep-sky objects can be seen from many, though not all, city locales. Xi’an, China, in July 2008 — two hours after sunrise. I was reminded of the problem la ...
Stellar Masses
... stably. Objects with masses slightly below this limit are called brown dwarfs, and are ‘star like’ in the sense that nuclear burning of deuterium occurs in their core. Below a mass of 0.015M⊙ (roughly 16 times the mass of Jupiter) not even deuterium burning can occur, and these objects are perhaps b ...
... stably. Objects with masses slightly below this limit are called brown dwarfs, and are ‘star like’ in the sense that nuclear burning of deuterium occurs in their core. Below a mass of 0.015M⊙ (roughly 16 times the mass of Jupiter) not even deuterium burning can occur, and these objects are perhaps b ...
Perseus (constellation)
Perseus, named after the Greek mythological hero Perseus, is a constellation in the northern sky. It was one of 48 listed by the 2nd-century astronomer Ptolemy and among the 88 modern constellations defined by the International Astronomical Union (IAU). It is located in the northern celestial hemisphere near several other constellations named after legends surrounding Perseus, including Andromeda to the west and Cassiopeia to the north. Perseus is also bordered by Aries and Taurus to the south, Auriga to the east, Camelopardalis to the north, and Triangulum to the west.The galactic plane of the Milky Way passes through Perseus but is mostly obscured by molecular clouds. The constellation's brightest star is the yellow-white supergiant Alpha Persei (also called Mirfak), which shines at magnitude 1.79. It and many of the surrounding stars are members of an open cluster known as the Alpha Persei Cluster. The best-known star, however, is Algol (Beta Persei), linked with ominous legends because of its variability, which is noticeable to the naked eye. Rather than being an intrinsically variable star, it is an eclipsing binary. Other notable star systems in Perseus include X Persei, a binary system containing a neutron star, and GK Persei, a nova that peaked at magnitude 0.2 in 1901. The Double Cluster, comprising two open clusters quite near each other in the sky, was known to the ancient Chinese. The constellation gives its name to the Perseus Cluster (Abell 426), a massive galaxy cluster located 250 million light-years from Earth. It hosts the radiant of the annual Perseids meteor shower—one of the most prominent meteor showers in the sky.