poster
... Abstract. DG Tau is a classical T Tauri star showing an unusual X-ray spectrum, best described by two thermal components with different absorption columns. The soft X-rays are less absorbed than the hard X-rays, presumably coronal, component. This rules out stellar accretion as the origin of the sof ...
... Abstract. DG Tau is a classical T Tauri star showing an unusual X-ray spectrum, best described by two thermal components with different absorption columns. The soft X-rays are less absorbed than the hard X-rays, presumably coronal, component. This rules out stellar accretion as the origin of the sof ...
X-Ray Astronomy Poster_Final
... The first technology useful for research above the atmosphere was that of the V2 rockets available after World War II. With these, scientist revealed that Sun is a powerful source of UV and Xradiation. This is only because Sun is extremely close to us. But this discovery caused many scientist to los ...
... The first technology useful for research above the atmosphere was that of the V2 rockets available after World War II. With these, scientist revealed that Sun is a powerful source of UV and Xradiation. This is only because Sun is extremely close to us. But this discovery caused many scientist to los ...
Chapter 13
... 13. Three terrestrial-sized planets in orbits of a fraction of an AU have been found near A) Cygnus X-1. B) a magnetar. C) a millisecond pulsar. D) a white dwarf. E) Supernova 1987A. ...
... 13. Three terrestrial-sized planets in orbits of a fraction of an AU have been found near A) Cygnus X-1. B) a magnetar. C) a millisecond pulsar. D) a white dwarf. E) Supernova 1987A. ...
Scientific Results Summary
... Subaru Telescope continues to expand the boundaries of astronomical knowledge and cosmological understanding. Another busy year of observations brought discoveries of interest to subjects ranging from Solar System bodies to stellar composition and distant dark matter. Subaru continues to lead the pa ...
... Subaru Telescope continues to expand the boundaries of astronomical knowledge and cosmological understanding. Another busy year of observations brought discoveries of interest to subjects ranging from Solar System bodies to stellar composition and distant dark matter. Subaru continues to lead the pa ...
EXAM II REVIEW - University of Maryland: Department of
... Motion toward or away from an observer causes a shift in the observed wavelength of light: • blueshift (shorter wavelength) motion toward you ...
... Motion toward or away from an observer causes a shift in the observed wavelength of light: • blueshift (shorter wavelength) motion toward you ...
Chapter 18 The Bizarre Stellar Graveyard What is a white dwarf
... • Beyond the neutron star limit, no known force can resist the crush of gravity. • As far as we know, gravity crushes all the matter into a single point known as a singularity. ...
... • Beyond the neutron star limit, no known force can resist the crush of gravity. • As far as we know, gravity crushes all the matter into a single point known as a singularity. ...
光學望遠鏡
... visible-light observations of faint objects. New space instruments under development are expected to directly observe planets around other stars, perhaps even some Earth-like worlds. In addition to telescopes, astronomers have begun using other instruments to make observations. ...
... visible-light observations of faint objects. New space instruments under development are expected to directly observe planets around other stars, perhaps even some Earth-like worlds. In addition to telescopes, astronomers have begun using other instruments to make observations. ...
GRB EXPERIMENT
... • They become active and emit bursts at apparently random times • Two common types of bursts: – Short (100 ms, up to 1041 erg s-1) – Giant flares (several hundred seconds, periodic emission, up to 1046 erg s-1) ...
... • They become active and emit bursts at apparently random times • Two common types of bursts: – Short (100 ms, up to 1041 erg s-1) – Giant flares (several hundred seconds, periodic emission, up to 1046 erg s-1) ...
Slide 1
... Rapapport 1987) distant 2.0 0.2 kpcs (Frail & Hjellming 1991) presents strong periodic radio emission (Gregory et al. 1979) and moderated periodic X (inverse-Compton) (Harrison et al. 2000). • Persistent radio bursts 2.5 - 4 days after periastron. • LS I already associated with gamma ray sources 2 ...
... Rapapport 1987) distant 2.0 0.2 kpcs (Frail & Hjellming 1991) presents strong periodic radio emission (Gregory et al. 1979) and moderated periodic X (inverse-Compton) (Harrison et al. 2000). • Persistent radio bursts 2.5 - 4 days after periastron. • LS I already associated with gamma ray sources 2 ...
Chapter 13 Neutron Stars and Black Holes
... The inference that pulsars are rapidly-rotating neutron stars arises most strongly from the A. power of their pulses. B. regularity of their pulses. C. very short pulse periods of the fastest pulsars. D. detection of their pulses at radio ...
... The inference that pulsars are rapidly-rotating neutron stars arises most strongly from the A. power of their pulses. B. regularity of their pulses. C. very short pulse periods of the fastest pulsars. D. detection of their pulses at radio ...
Hitomi Observation of the Highly Obscured High-Mass X-ray
... power-law and three gaussians to account for the fluorescence lines. Comparing the spectral parameters with those obtained from Suzaku observation in 2006 (Barragan et al. 2009, A&A, 508, 1275), the flux of continuum and line components significantly decreased in this ten years while the equivalent ...
... power-law and three gaussians to account for the fluorescence lines. Comparing the spectral parameters with those obtained from Suzaku observation in 2006 (Barragan et al. 2009, A&A, 508, 1275), the flux of continuum and line components significantly decreased in this ten years while the equivalent ...
Using a distant X-ray source to detect small Transneptunian Objects
... [translated and adapted from Sterne und Weltraum 10/2006 by Gareth Kelly] A Taiwanese astronomy team has used an unusual technique to detect very small TNOs. They used measurements from the satellite ROSSI X-ray Timing Explorer of the brightest X-ray object in the sky, Scorpius X-1, which is a pulsa ...
... [translated and adapted from Sterne und Weltraum 10/2006 by Gareth Kelly] A Taiwanese astronomy team has used an unusual technique to detect very small TNOs. They used measurements from the satellite ROSSI X-ray Timing Explorer of the brightest X-ray object in the sky, Scorpius X-1, which is a pulsa ...
Super-solar Metal Abundances in Two Galaxies at ζ ∼ 3.57
... (LBGs) at 3.0 < z < 3.7 indicates that the most massive objects (M! ∼ 1011 M" ) can be metal rich (Maiolino et al. 2008; Mannucci et al. 2009). The emerging picture is that the spread in metallicity is large at any redshift, certainly much larger than what one would expect based on DLAs in QSO spect ...
... (LBGs) at 3.0 < z < 3.7 indicates that the most massive objects (M! ∼ 1011 M" ) can be metal rich (Maiolino et al. 2008; Mannucci et al. 2009). The emerging picture is that the spread in metallicity is large at any redshift, certainly much larger than what one would expect based on DLAs in QSO spect ...
Unit 5: Space Exploration Topic 1: Our Eyes Only • Define FRAME
... • What are the THREE basic parts of a rocket? What is each part responsible for? • The structural and mechanical elements: everything from the rocket itself to engines, storage tanks and fins • The fuel • The payload • What is the difference between an artificial satellite and a natural satellite? W ...
... • What are the THREE basic parts of a rocket? What is each part responsible for? • The structural and mechanical elements: everything from the rocket itself to engines, storage tanks and fins • The fuel • The payload • What is the difference between an artificial satellite and a natural satellite? W ...
Supercomputer simulation provides missing link between turbulence, hypernovae and gamma-ray bursts
... Brightest events in universe Gamma-ray bursts are so brief and energetic – long bursts last about 100 seconds, with wavelengths far outside the visible or ultraviolet bands – that they were not observed until 1967 by satellites looking for evidence of nuclear bomb tests. Most are billions of light y ...
... Brightest events in universe Gamma-ray bursts are so brief and energetic – long bursts last about 100 seconds, with wavelengths far outside the visible or ultraviolet bands – that they were not observed until 1967 by satellites looking for evidence of nuclear bomb tests. Most are billions of light y ...
RXTE PCA Contributions to Monitoring Fast Transients
... 62 sources are in the current fit list, including: 18 XTE 6 SAX 4 GRS 3 SLX 3 EXO 6 RXS + 4U, 2S, GS, 1E, NGC, SGR2. (Many were seen by more than 1 mission and which name we use may be “accidental”.) ~ 31 of these are transient (not there at the 3 sigma level at some time). ~ 31 have been on always ...
... 62 sources are in the current fit list, including: 18 XTE 6 SAX 4 GRS 3 SLX 3 EXO 6 RXS + 4U, 2S, GS, 1E, NGC, SGR2. (Many were seen by more than 1 mission and which name we use may be “accidental”.) ~ 31 of these are transient (not there at the 3 sigma level at some time). ~ 31 have been on always ...
SGR 1900+14
... Some comparisons: GRB prompt emission peak fluxes: 10-8-10-3 ergs/cm2 s X-ray afterglows of long bursts: ~10-11 – 10-13 ergs/cm2 s Previous giant flares: ~10-3 ergs/cm2 s Typical SGR bursts: 10-9 – 10-6 ergs/cm2 s ...
... Some comparisons: GRB prompt emission peak fluxes: 10-8-10-3 ergs/cm2 s X-ray afterglows of long bursts: ~10-11 – 10-13 ergs/cm2 s Previous giant flares: ~10-3 ergs/cm2 s Typical SGR bursts: 10-9 – 10-6 ergs/cm2 s ...
The Ultraluminous X-ray Source in Holmberg IX and its Environment
... mass black holes (IMBHs) having 102 to 105 solar masses (Colbert & Mushotzky 1999) or non-isotropic emission beamed into our line-of-sight (King et al. 2001). Here, we are interested in one of these objects, Holmberg IX X-1, located at a distance of 3.6 Mpc in a dwarf galaxy companion of M81. Miller ...
... mass black holes (IMBHs) having 102 to 105 solar masses (Colbert & Mushotzky 1999) or non-isotropic emission beamed into our line-of-sight (King et al. 2001). Here, we are interested in one of these objects, Holmberg IX X-1, located at a distance of 3.6 Mpc in a dwarf galaxy companion of M81. Miller ...
The most energetic light ever observed from a few
... In 2011, the MAGIC and VERITAS observatories discovered unexpected very energetic photons. Emma de Oña Wilhelmi from the Institute of Space Sciences (IEEC-CSIC, Barcelona) and Principal Investigator of this observation program says: “We performed deep observation of the Crab pulsar with MAGIC to und ...
... In 2011, the MAGIC and VERITAS observatories discovered unexpected very energetic photons. Emma de Oña Wilhelmi from the Institute of Space Sciences (IEEC-CSIC, Barcelona) and Principal Investigator of this observation program says: “We performed deep observation of the Crab pulsar with MAGIC to und ...
High-Energy Astrophysics with Gamma
... This would make Arp 220 observable for GLAST and VERITAS/HESS/MAGIC telescopes. The latter would need < 100 hours to detect it. Be aware of cross sections for pion decays above 1 TeV. Proof of concept beyond ARP 220 detectability itself: LIRGs well within the 100 Mpc sphere should be TeV sources! ...
... This would make Arp 220 observable for GLAST and VERITAS/HESS/MAGIC telescopes. The latter would need < 100 hours to detect it. Be aware of cross sections for pion decays above 1 TeV. Proof of concept beyond ARP 220 detectability itself: LIRGs well within the 100 Mpc sphere should be TeV sources! ...