The Milky Way - National Tsing Hua University
... around the pulsar, they cause it to wobble around, resulting in slight changes of the ...
... around the pulsar, they cause it to wobble around, resulting in slight changes of the ...
The Galaxy Luminosity Function
... → Few galaxies have L >> L* because they are rare → Few galaxies have L << L* because they are too faint to see 2) M31 (MB = -20.3) is a 0.5L* galaxy, & the combined Local Group ~ 1 L*. 3) cD galaxies, which are 5 – 10 L*, do not fit into the Schechter function scheme. ...
... → Few galaxies have L >> L* because they are rare → Few galaxies have L << L* because they are too faint to see 2) M31 (MB = -20.3) is a 0.5L* galaxy, & the combined Local Group ~ 1 L*. 3) cD galaxies, which are 5 – 10 L*, do not fit into the Schechter function scheme. ...
Slide 1
... be conceived as a planet, for the transitory character of terrestrial affairs would now have been discovered in the heavens as well. Brahe and the best of his contemporaries did conclude that the visitor was a star. Observations … indicated that it could not be located below the sphere of the moon o ...
... be conceived as a planet, for the transitory character of terrestrial affairs would now have been discovered in the heavens as well. Brahe and the best of his contemporaries did conclude that the visitor was a star. Observations … indicated that it could not be located below the sphere of the moon o ...
Full Poster - Cool Cosmos
... emitted or reflected by objects in space. Apart from a few exceptions, such as the collection of moon rocks, astronomers must rely on collecting and analyzing the faint light from distant objects in order to study the cosmos. This fact is even more remarkable when you consider the vastness of space. ...
... emitted or reflected by objects in space. Apart from a few exceptions, such as the collection of moon rocks, astronomers must rely on collecting and analyzing the faint light from distant objects in order to study the cosmos. This fact is even more remarkable when you consider the vastness of space. ...
Galactic sources science with AGILE The case of the Carina Region
... dataset for the Gamma Ray sky, with particular focus to Galactic plane regions (e.g. Carina, Cygnus, Crux). Among the different science topics explored by the AGILE Galactic Working Group (Diffuse gamma-ray emission, pulsars, SNRs and origin of cosmic rays, massive sources, microquasars, compact obj ...
... dataset for the Gamma Ray sky, with particular focus to Galactic plane regions (e.g. Carina, Cygnus, Crux). Among the different science topics explored by the AGILE Galactic Working Group (Diffuse gamma-ray emission, pulsars, SNRs and origin of cosmic rays, massive sources, microquasars, compact obj ...
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 ...
arXiv 2011 Feroci
... superstrong magnetic fields in neutron stars. Yet tantalizingly, while the relevant signals were identified, due to its still limited sensitivity, RXTE was only able to scratch the surface when it came to actually using these diagnostics to probe strong field gravity and ultradense matter. LOFT is s ...
... superstrong magnetic fields in neutron stars. Yet tantalizingly, while the relevant signals were identified, due to its still limited sensitivity, RXTE was only able to scratch the surface when it came to actually using these diagnostics to probe strong field gravity and ultradense matter. LOFT is s ...
Science with the Constellation
... relativistically broadened iron Ka emission line from active galactic nuclei (AGN), a signature of strong general relativistic effects that provides a new probe of the immediate black hole environment. The X-ray satellite ROSAT resolved 80% of the X-ray background at 1 keV into discrete sources, man ...
... relativistically broadened iron Ka emission line from active galactic nuclei (AGN), a signature of strong general relativistic effects that provides a new probe of the immediate black hole environment. The X-ray satellite ROSAT resolved 80% of the X-ray background at 1 keV into discrete sources, man ...
FEEDBACK IN THE LOCAL UNIVERSE: The
... radio source has returned upwards of 1061 erg to regions of the cluster that extend even beyond the cooling radius. Note the strong spatial anti-correlation of the radio source (in pink) with the X-ray cavities (in blue). Such correspondence is typical of cool core clusters with cavities and extende ...
... radio source has returned upwards of 1061 erg to regions of the cluster that extend even beyond the cooling radius. Note the strong spatial anti-correlation of the radio source (in pink) with the X-ray cavities (in blue). Such correspondence is typical of cool core clusters with cavities and extende ...
Stellar Magnetic Activity
... Since they are tidally locked close binaries, they are also fast rotators. Thus, similar to other cool active stars, RS CVn-type variables are remarkable due to strong chromospheric plages, coronal X-ray, and microwave emissions, as well as strong flares in the optical, UV, radio, and X-ray. Large ...
... Since they are tidally locked close binaries, they are also fast rotators. Thus, similar to other cool active stars, RS CVn-type variables are remarkable due to strong chromospheric plages, coronal X-ray, and microwave emissions, as well as strong flares in the optical, UV, radio, and X-ray. Large ...
The ROSAT galactic plane survey: ASTRONOMY AND
... than that of the RGPS. Obviously, the identification of this large amount of X-ray sources is far beyond the nowadays possibilities. Accordingly, we used three different paths for exploring this unprecedented amount of new sources. The first and easiest step was the cross correlation of RGPS source ...
... than that of the RGPS. Obviously, the identification of this large amount of X-ray sources is far beyond the nowadays possibilities. Accordingly, we used three different paths for exploring this unprecedented amount of new sources. The first and easiest step was the cross correlation of RGPS source ...
Laboratory Studies of Organic Chemistry in Space A. Ciaravella
... 2 − The ice is then irradiated 3 − Ice evolution is followed by means of IR spectroscopy (mostly transmission) 4 − After irradiation the substrate is heated at a rate of 1-2 K min-1 or slower 5 − The ice desorbs and the desorbed species are detected by the Mass Spectrometer 6 − Refractory residue on ...
... 2 − The ice is then irradiated 3 − Ice evolution is followed by means of IR spectroscopy (mostly transmission) 4 − After irradiation the substrate is heated at a rate of 1-2 K min-1 or slower 5 − The ice desorbs and the desorbed species are detected by the Mass Spectrometer 6 − Refractory residue on ...
Accreting magnetars: a new type of high-mass X-ray binaries? P. Reig,
... models in close binary systems, such slow pulsations require magnetic field strengths of the order of 1014 G, that is, they require the system to harbour a magnetar (Finger et al. 2010; Ikhsanov & ...
... models in close binary systems, such slow pulsations require magnetic field strengths of the order of 1014 G, that is, they require the system to harbour a magnetar (Finger et al. 2010; Ikhsanov & ...
Jul y 10-12,
... IGR J17091-3624 is a black hole system which has very recently attracted the interest in the scientific community as it is the first system to show some of the bizarre, high-amplitude, highly-structured X-ray variability only seen before in the extremely energetic black hole system GRS 1915+105. In ...
... IGR J17091-3624 is a black hole system which has very recently attracted the interest in the scientific community as it is the first system to show some of the bizarre, high-amplitude, highly-structured X-ray variability only seen before in the extremely energetic black hole system GRS 1915+105. In ...
2 workshop on X-ray and XUV active optics
... ska band coming from Varese province, who debuted in ’97 with an album called “Greatest Hits n.7”, the Carnicats, regional hip hop group consisting of 4 boys from Tolmezzo, in their twenties, who have recently issued their first album and Terza Sfera, electronic pop group, with lyrics in English sun ...
... ska band coming from Varese province, who debuted in ’97 with an album called “Greatest Hits n.7”, the Carnicats, regional hip hop group consisting of 4 boys from Tolmezzo, in their twenties, who have recently issued their first album and Terza Sfera, electronic pop group, with lyrics in English sun ...
A Search for New Solar-Type Post-T Tauri Stars in
... The Taurus-Auriga and Sco-Cen regions of recent star formation were active approximately 1-3 and 10-30 Myr ago, respectively. Over the past several decades several hundred young stars have been identified in each of these regions based on various techniques including objective prism surveys for chro ...
... The Taurus-Auriga and Sco-Cen regions of recent star formation were active approximately 1-3 and 10-30 Myr ago, respectively. Over the past several decades several hundred young stars have been identified in each of these regions based on various techniques including objective prism surveys for chro ...
letters - MIT Kavli Institute for Astrophysics and Space Research
... larger than the recently revised solar value. The neon abundance in the Sun is quite poorly determined. If the Ne/O abundance in these stars is adopted for the Sun, the models are brought back into agreement with helioseismology measurements5,6. The role of the Sun as a fundamental benchmark of stel ...
... larger than the recently revised solar value. The neon abundance in the Sun is quite poorly determined. If the Ne/O abundance in these stars is adopted for the Sun, the models are brought back into agreement with helioseismology measurements5,6. The role of the Sun as a fundamental benchmark of stel ...
Stellar-Mass Black Holes and Ultraluminous X
... more efficient outwards transfer of system GX 339-4, a key source in our understanding of black hole accretion exists in the hard state, which may have angular momentum and inwards trans- and the source of the data presented in Fig. 2. [Image produced with BinSim a steeper correlation (12), and yet ...
... more efficient outwards transfer of system GX 339-4, a key source in our understanding of black hole accretion exists in the hard state, which may have angular momentum and inwards trans- and the source of the data presented in Fig. 2. [Image produced with BinSim a steeper correlation (12), and yet ...
The Stellar Population And Origin Of The Mysterious K.V. Getman
... The mysterious high galactic latitude cometary globule (CG) CG12 has been observed with the ACIS detector on board the Chandra X-ray Observatory. We detect 128 X-ray sources, of which a half are likely young stars formed within the globule's head. This new population of >=50 T-Tauri stars and one ne ...
... The mysterious high galactic latitude cometary globule (CG) CG12 has been observed with the ACIS detector on board the Chandra X-ray Observatory. We detect 128 X-ray sources, of which a half are likely young stars formed within the globule's head. This new population of >=50 T-Tauri stars and one ne ...
Document
... - Very red colors: R-K>5 (EROs) - K~18 (dominated by the host galaxy) Results: -Spectroscopic identification of 7 objects - 1.3 < z < 2.1 - 1044 < L2-10keV < 1045 erg s-1 type 2 QSOs - 1022.3
... - Very red colors: R-K>5 (EROs) - K~18 (dominated by the host galaxy) Results: -Spectroscopic identification of 7 objects - 1.3 < z < 2.1 - 1044 < L2-10keV < 1045 erg s-1 type 2 QSOs - 1022.3
L. Moustakas
... z=5.828 galaxy Typical LBG colors. Clear evidence for a Balmer break between K and 3.6mm. Otherwise blue SED (above & below break) suggests low reddening, but this is not well constrained. ...
... z=5.828 galaxy Typical LBG colors. Clear evidence for a Balmer break between K and 3.6mm. Otherwise blue SED (above & below break) suggests low reddening, but this is not well constrained. ...
Neutron Star
... Some neutron stars have magnetic fields ~ 1000 times stronger even than normal neutron stars. These care called Magnetars. ...
... Some neutron stars have magnetic fields ~ 1000 times stronger even than normal neutron stars. These care called Magnetars. ...
The Milky Way - Houston Community College System
... Some neutron stars have magnetic fields ~ 100 times stronger even than normal neutron stars. These care called Magnetars. ...
... Some neutron stars have magnetic fields ~ 100 times stronger even than normal neutron stars. These care called Magnetars. ...
ly Searching the Sky: The Swift Mission and High Energy Physics Connections
... UHECRs are known to be extragalactic, but intervening magnetic fields make it difficult to discover exactly where they come from. ...
... UHECRs are known to be extragalactic, but intervening magnetic fields make it difficult to discover exactly where they come from. ...
Investigation of substrates and mounting techniques for the High
... substrates for our hard X-ray optics. These glasses are produced by a method, known as ‘overflow’, in which the glass sheet is never in mechanical contact with any surface. Deviations from uniformity are small, with the most pronounced error being a variation in thickness of 25 µm from one side of t ...
... substrates for our hard X-ray optics. These glasses are produced by a method, known as ‘overflow’, in which the glass sheet is never in mechanical contact with any surface. Deviations from uniformity are small, with the most pronounced error being a variation in thickness of 25 µm from one side of t ...
X-ray astronomy
X-ray astronomy is an observational branch of astronomy which deals with the study of X-ray observation and detection from astronomical objects. X-radiation is absorbed by the Earth's atmosphere, so instruments to detect X-rays must be taken to high altitude by balloons, sounding rockets, and satellites. X-ray astronomy is the space science related to a type of space telescope that can see farther than standard light-absorption telescopes, such as the Mauna Kea Observatories, via x-ray radiation.X-ray emission is expected from astronomical objects that contain extremely hot gasses at temperatures from about a million kelvin (K) to hundreds of millions of kelvin (MK). Although X-rays have been observed emanating from the Sun since the 1940s, the discovery in 1962 of the first cosmic X-ray source was a surprise. This source is called Scorpius X-1 (Sco X-1), the first X-ray source found in the constellation Scorpius. The X-ray emission of Scorpius X-1 is 10,000 times greater than its visual emission, whereas that of the Sun is about a million times less. In addition, the energy output in X-rays is 100,000 times greater than the total emission of the Sun in all wavelengths. Based on discoveries in this new field of X-ray astronomy, starting with Scorpius X-1, Riccardo Giacconi received the Nobel Prize in Physics in 2002. It is now known that such X-ray sources as Sco X-1 are compact stars, such as neutron stars or black holes. Material falling into a black hole may emit X-rays, but the black hole itself does not. The energy source for the X-ray emission is gravity. Infalling gas and dust is heated by the strong gravitational fields of these and other celestial objects.Many thousands of X-ray sources are known. In addition, the space between galaxies in galaxy clusters is filled with a very hot, but very dilute gas at a temperature between 10 and 100 megakelvins (MK). The total amount of hot gas is five to ten times the total mass in the visible galaxies.