1 Introduction - Wiley-VCH
... the submillimeter domain (250 μm, Herschel space mission), where dust heating from the general interstellar field becomes more important. This clumpy structure can be also seen in the radio continuum (VLA) given that the relativistic electrons responsible for the synchrotron emission are accelerated ...
... the submillimeter domain (250 μm, Herschel space mission), where dust heating from the general interstellar field becomes more important. This clumpy structure can be also seen in the radio continuum (VLA) given that the relativistic electrons responsible for the synchrotron emission are accelerated ...
PDF
... with ultra-high magnetic fields, so-called “magnetars” (Duncan & Thompson 1992). In this model, the X-ray emission is powered either by decay of the large magnetic field (Thompson & Duncan 1996) or neutron star cooling enhanced by the presence of the strong field (Heyl & Hernquist 1997a). Assuming m ...
... with ultra-high magnetic fields, so-called “magnetars” (Duncan & Thompson 1992). In this model, the X-ray emission is powered either by decay of the large magnetic field (Thompson & Duncan 1996) or neutron star cooling enhanced by the presence of the strong field (Heyl & Hernquist 1997a). Assuming m ...
Non-thermal hard X-ray emission from stellar coronae
... Ingredients: X-ray photoionization, viscous heating, radiative cooling, and turbulent mixing of gas, dust and grain phases, with ...
... Ingredients: X-ray photoionization, viscous heating, radiative cooling, and turbulent mixing of gas, dust and grain phases, with ...
Sample pages 1 PDF
... this background radiation, emitted some 380 000 years after the Big Bang, i.e., at a time 2:7 105 t0 , have made an important contribution to what we know today about the composition of the Universe. However, these results raise more questions than they answer: only 4 % of the energy content o ...
... this background radiation, emitted some 380 000 years after the Big Bang, i.e., at a time 2:7 105 t0 , have made an important contribution to what we know today about the composition of the Universe. However, these results raise more questions than they answer: only 4 % of the energy content o ...
Iowa - LIGO
... an extra +43”/century compared to Newton’s theory Mercury's elliptical path around the Sun shifts slightly with each orbit such that its closest point to the Sun (or "perihelion") shifts forward with each pass. ...
... an extra +43”/century compared to Newton’s theory Mercury's elliptical path around the Sun shifts slightly with each orbit such that its closest point to the Sun (or "perihelion") shifts forward with each pass. ...
X-ray activity cycle on the active ultra
... gratings. These two reflection-grating spectrometers (RGS) provide high spectral resolution (E/ΔE ≈ 200–800) in the energy range 0.35–2.5 keV. Useful data were obtained from the EPIC and the RGS detectors (see Table 1 for a detailed account). AB Dor A, which is a very bright target with many emissio ...
... gratings. These two reflection-grating spectrometers (RGS) provide high spectral resolution (E/ΔE ≈ 200–800) in the energy range 0.35–2.5 keV. Useful data were obtained from the EPIC and the RGS detectors (see Table 1 for a detailed account). AB Dor A, which is a very bright target with many emissio ...
Discovery of an Unusual Optical Transient with the Hubble Space
... However, there is no significant Hα (6563 Å) emission or absorption, which would be expected for the presence of strong Hγ and Hβ features. (Although there is slight evidence for emission at 6563 Å in the Keck spectrum, this is not seen in the VLT or Subaru spectra.) The absorption feature at 5890 ...
... However, there is no significant Hα (6563 Å) emission or absorption, which would be expected for the presence of strong Hγ and Hβ features. (Although there is slight evidence for emission at 6563 Å in the Keck spectrum, this is not seen in the VLT or Subaru spectra.) The absorption feature at 5890 ...
AGN surveys to study galaxy evolution along cosmic times
... “The observed line intensities [....] in NGC1068 and 4151 closely resemble the line intensities of the planetary nebula NGC7027” and “The hydrogen lines in NGC4151 and 7469 are of unusual interest, being composed of relatively narrow cores (1100 km/sec wide) superposed on very wide wings (7500 km/se ...
... “The observed line intensities [....] in NGC1068 and 4151 closely resemble the line intensities of the planetary nebula NGC7027” and “The hydrogen lines in NGC4151 and 7469 are of unusual interest, being composed of relatively narrow cores (1100 km/sec wide) superposed on very wide wings (7500 km/se ...
Chandra Characterization of X-ray Emission in the Young F
... parallax) from the Earth (van Leeuwen 2007). Little is known about this system in the Xray, other than it is a reported unresolved RASS source of luminosity 2.1 +/- 0.7 x 1029 erg s-1. On the other hand, in the optical/IR, the system is very interesting. With two component stars of nearly identical ...
... parallax) from the Earth (van Leeuwen 2007). Little is known about this system in the Xray, other than it is a reported unresolved RASS source of luminosity 2.1 +/- 0.7 x 1029 erg s-1. On the other hand, in the optical/IR, the system is very interesting. With two component stars of nearly identical ...
Slide 1
... SGRs are magnetars occasionally emitting energetic bursts in the early phase of their life times. A young neutron star with age <10,000 years. ...
... SGRs are magnetars occasionally emitting energetic bursts in the early phase of their life times. A young neutron star with age <10,000 years. ...
Finding the Most Distant Quasars Using Bayesian Selection Methods
... be put into the selection methods. This is best illustrated by example, as in Section 2, which describes the properties of a recent astronomical survey that was, in part, designed to find quasars more distant than any previously known. However, it quickly became apparent that the simple methods that ...
... be put into the selection methods. This is best illustrated by example, as in Section 2, which describes the properties of a recent astronomical survey that was, in part, designed to find quasars more distant than any previously known. However, it quickly became apparent that the simple methods that ...
cassini, rømer and the velocity of light
... Romer explained very ingeniously one of these inequalities that he observed for several years in the first satellite by the successive motion of light, which needs more time to come from Jupiter to the Earth when it is more distant than when it is closer; but he did not examine if this hypothesis wo ...
... Romer explained very ingeniously one of these inequalities that he observed for several years in the first satellite by the successive motion of light, which needs more time to come from Jupiter to the Earth when it is more distant than when it is closer; but he did not examine if this hypothesis wo ...
Electronic version
... and while many post docs have embarked on a promising but uncertain career, the number of available positions does not increase and in some countries becomes ...
... and while many post docs have embarked on a promising but uncertain career, the number of available positions does not increase and in some countries becomes ...
Dust and molecular gas in the most distant quasars
... • How the most massive black hole – bulge systems evolve at their early stage. • Can we see active building via massive star formation co-eval with rapid black hole accretion? • Dynamical mass; • Black hole – bulge ratios; ...
... • How the most massive black hole – bulge systems evolve at their early stage. • Can we see active building via massive star formation co-eval with rapid black hole accretion? • Dynamical mass; • Black hole – bulge ratios; ...
Quantitative constraints on starburst cycles in galaxies with stellar
... galaxies. High mass galaxies with large burst mass fractions are more centrally concentrated, indicating that bulge formation is at work. In low mass galaxies, stellar surface densities µ∗ decrease as a function of Fburst . These results are in good agreement with the observational predictions of Te ...
... galaxies. High mass galaxies with large burst mass fractions are more centrally concentrated, indicating that bulge formation is at work. In low mass galaxies, stellar surface densities µ∗ decrease as a function of Fburst . These results are in good agreement with the observational predictions of Te ...
11115002
... c. Radio pulsars with flat spectrum (XTE J1810-197) (noted as an exceptional case). 4. Optical pulsar: rare form of visible pulsar (e.g.: Crab) 5. Gamma-ray pulsar: young neutron stars with strong magnetic fields (e.g. Geminga). Soon after the discovery of the first radio pulsar in 1967, PSR B0833— ...
... c. Radio pulsars with flat spectrum (XTE J1810-197) (noted as an exceptional case). 4. Optical pulsar: rare form of visible pulsar (e.g.: Crab) 5. Gamma-ray pulsar: young neutron stars with strong magnetic fields (e.g. Geminga). Soon after the discovery of the first radio pulsar in 1967, PSR B0833— ...
Searching for continuous waves
... Use two or more detectors: search for double or triple coincident “triggers” Can infer masses and “effective” distance. Estimate inverse false alarm probability of resulting candidates: detection? ...
... Use two or more detectors: search for double or triple coincident “triggers” Can infer masses and “effective” distance. Estimate inverse false alarm probability of resulting candidates: detection? ...
New INTEGRAL High Mass X
... cutoffpl : ph. index = 1.6 Ec = 60 keV 3 gaussians at 6.4 keV, 7.099 keV and 7.45 keV ...
... cutoffpl : ph. index = 1.6 Ec = 60 keV 3 gaussians at 6.4 keV, 7.099 keV and 7.45 keV ...
Hidden57_rf
... Universe was limited by our eyes and the thoughts that sprung from considering what they could see. The huge leap in capability that even such a simple instrument could realise set us on the path of creating ever more powerful instruments to satisfy our voracious appetite for knowledge. Nonetheless, ...
... Universe was limited by our eyes and the thoughts that sprung from considering what they could see. The huge leap in capability that even such a simple instrument could realise set us on the path of creating ever more powerful instruments to satisfy our voracious appetite for knowledge. Nonetheless, ...
October 2016 BRAS Newsletter - The Baton Rouge Astronomical
... ‘The burst of the century’ “This was the burst of the century!” exclaimed James A. Wren, an engineer at Los Alamos National Laboratory and coauthor of one of the papers. Indeed, GRB 130427A (as it is now called) was the most powerful gamma-ray burst and the secondbrightest optical flash measured in ...
... ‘The burst of the century’ “This was the burst of the century!” exclaimed James A. Wren, an engineer at Los Alamos National Laboratory and coauthor of one of the papers. Indeed, GRB 130427A (as it is now called) was the most powerful gamma-ray burst and the secondbrightest optical flash measured in ...
GRB jets and their interaction with the progenitor star
... opening angle of 10o and =10 is propagated through polytropic stars of varying mass and radius. The break-out time depends very mildly on the mass, so too the energy deposited into the star ...
... opening angle of 10o and =10 is propagated through polytropic stars of varying mass and radius. The break-out time depends very mildly on the mass, so too the energy deposited into the star ...
Irregular Satellites of the Giant Planets
... history. They may thus constitute an intact sample of the planetesimals that accreted to form the cores of the jovian planets. Ranging in diameter from ~2 km to over 300 km, these bodies overlap the lower end of the presently known population of transneptunian objects (TNOs). Their size distribution ...
... history. They may thus constitute an intact sample of the planetesimals that accreted to form the cores of the jovian planets. Ranging in diameter from ~2 km to over 300 km, these bodies overlap the lower end of the presently known population of transneptunian objects (TNOs). Their size distribution ...
3.1 Radio Astronomy Research Results For much of PY 2010, radio
... Chandrasekhar limit and ruling out some equations of state for super-dense matter. Its mass is also consistent with spin-up of the pulsar by mass accretion. Optical spectroscopy shows the companion to be a main sequence star, implying that it is not the star that recycled the pulsar. It is suggested ...
... Chandrasekhar limit and ruling out some equations of state for super-dense matter. Its mass is also consistent with spin-up of the pulsar by mass accretion. Optical spectroscopy shows the companion to be a main sequence star, implying that it is not the star that recycled the pulsar. It is suggested ...
Quiescent and flaring X-ray emission from the nearby M/T dwarf
... data analysis was carried out with the standard XMM software, the Science Analysis System (SAS) version 9.0 (de la Calle & Loiseau 2008). XMM-Newton carries three X-ray CCD cameras with moderate spectral resolution, as well as two X-ray grating spectrometers, which provide higher spectral resolution ...
... data analysis was carried out with the standard XMM software, the Science Analysis System (SAS) version 9.0 (de la Calle & Loiseau 2008). XMM-Newton carries three X-ray CCD cameras with moderate spectral resolution, as well as two X-ray grating spectrometers, which provide higher spectral resolution ...
- Notesvillage
... nor terminates at the satellite itself. The satellite is an active transmission relay, similar in function to relay towers used in terrestrial microwave communications. The commercial satellite communications industry has its beginnings in the mid1960s, and in less than 50 years has progressed from ...
... nor terminates at the satellite itself. The satellite is an active transmission relay, similar in function to relay towers used in terrestrial microwave communications. The commercial satellite communications industry has its beginnings in the mid1960s, and in less than 50 years has progressed from ...