Local Universe Supernovae and Their Host Galaxies
... SN185 in 185AD. The Crab Nebula associated with the 1054 supernova Tyco’s Nova SN1572 Kepler's supernova Remnant, SN 1604 G1.9+0.3: Youngest (~140 yr) known SN ...
... SN185 in 185AD. The Crab Nebula associated with the 1054 supernova Tyco’s Nova SN1572 Kepler's supernova Remnant, SN 1604 G1.9+0.3: Youngest (~140 yr) known SN ...
the mass distribution and lifetime of prestellar cores in perseus
... Nebula at M 3 times the turnover in the Trapezium IMF (Muench et al. 2002), and suggest that the stellar IMF is a direct product of the CMD, with a uniform core-to-star efficiency of 30% 10%. The mean particle densities of the extinctionidentified cores in the Pipe Nebula study (5 ; 10 3 2 ; 10 ...
... Nebula at M 3 times the turnover in the Trapezium IMF (Muench et al. 2002), and suggest that the stellar IMF is a direct product of the CMD, with a uniform core-to-star efficiency of 30% 10%. The mean particle densities of the extinctionidentified cores in the Pipe Nebula study (5 ; 10 3 2 ; 10 ...
The empirical grounds of SN
... To achieve such a luminosity about 0.5-0.7 M of Ni have to be synthesized in the explosion. This is unprecedented for Core Collapse events (less than 0.1 M ) • The radio emitting shell was expanding at ...
... To achieve such a luminosity about 0.5-0.7 M of Ni have to be synthesized in the explosion. This is unprecedented for Core Collapse events (less than 0.1 M ) • The radio emitting shell was expanding at ...
2012 December Vol. 49 No 584
... the light pollution which most of us suffered today wherever we are in the world. However against this simplistic comparison with today’s astronomers, those in the past did not necessarily have the same quality optics even if of similar aperture. Also various aspects of the weather such as haze and ...
... the light pollution which most of us suffered today wherever we are in the world. However against this simplistic comparison with today’s astronomers, those in the past did not necessarily have the same quality optics even if of similar aperture. Also various aspects of the weather such as haze and ...
The Case for an Accelerating Universe from
... 1998 ; Riess et al. 1998) but have improved with the availability of the Keck Telescope and an increased emphasis on the search for clues of SN Ia evolution. Most of the spectral identiÐcations were made by visual comparison to template spectra of nearby SNe Ia. More recently, automated crosscorrela ...
... 1998 ; Riess et al. 1998) but have improved with the availability of the Keck Telescope and an increased emphasis on the search for clues of SN Ia evolution. Most of the spectral identiÐcations were made by visual comparison to template spectra of nearby SNe Ia. More recently, automated crosscorrela ...
Document
... sunset, I was contemplating the stars in a clear sky. I noticed that a new and unusual star, surpassing the other stars in brilliancy, was shining almost directly above my head.’’ -- Tycho Brahe ...
... sunset, I was contemplating the stars in a clear sky. I noticed that a new and unusual star, surpassing the other stars in brilliancy, was shining almost directly above my head.’’ -- Tycho Brahe ...
On the nature of Type IIn/Ia–CSM supernovae
... (WD) primary star that approaches the Chandrasekhar limit by accreting material from a companion star. While the nature of the companion remains somewhat ambiguous, recent arguments suggest that a WD companion (i.e. a double-degenerate progenitor) is more commonplace than the single-degenerate scena ...
... (WD) primary star that approaches the Chandrasekhar limit by accreting material from a companion star. While the nature of the companion remains somewhat ambiguous, recent arguments suggest that a WD companion (i.e. a double-degenerate progenitor) is more commonplace than the single-degenerate scena ...
Building galaxies Hunt, Leslie Kipp
... New General Catalogue (NGC) and its successors the First and Second Index Catalogue (IC), published from 1888 to 1908. The combined NGC+IC contains more than 12000 objects, and to this day the brightest extragalactic objects are denoted by their numbers in Dreyer’s catalogue. The nature of these neb ...
... New General Catalogue (NGC) and its successors the First and Second Index Catalogue (IC), published from 1888 to 1908. The combined NGC+IC contains more than 12000 objects, and to this day the brightest extragalactic objects are denoted by their numbers in Dreyer’s catalogue. The nature of these neb ...
The Observer`s Guide to the Gamma-Ray Burst
... being roughly 15,000 to 20,000 km s−1 more rapid than the other GRB-SNe. SN 2013ez is also a notable outlier due to its low line velocity (4000 − 6000 km s−1 ), and inspection of its spectrum (Fig. 5) reveals fewer broad features than other GRB-SNe, where it more closely resembles type Ic SNe rather ...
... being roughly 15,000 to 20,000 km s−1 more rapid than the other GRB-SNe. SN 2013ez is also a notable outlier due to its low line velocity (4000 − 6000 km s−1 ), and inspection of its spectrum (Fig. 5) reveals fewer broad features than other GRB-SNe, where it more closely resembles type Ic SNe rather ...
Neutrino Astrophysics
... was the apparent absence of energy conservation in nuclear β decay that first lead Wolfgang Pauli, more than 80 years ago, to suggest that some undetected neutral particle (the νe ) must be escaping from nuclear β decay experiments. Neutrinos play a very special role in astrophysics [2]. First, they ...
... was the apparent absence of energy conservation in nuclear β decay that first lead Wolfgang Pauli, more than 80 years ago, to suggest that some undetected neutral particle (the νe ) must be escaping from nuclear β decay experiments. Neutrinos play a very special role in astrophysics [2]. First, they ...
IDEA MAN
... to study mathematics, engineering, and physics. With World War I raging, Switzerland provided a haven for many of Europe’s greatest minds. Zwicky met Albert Einstein, Wolfgang Pauli, and Vladimir Lenin. After graduation, Zwicky stayed on to pursue a degree in theoretical physics. His thesis applied ...
... to study mathematics, engineering, and physics. With World War I raging, Switzerland provided a haven for many of Europe’s greatest minds. Zwicky met Albert Einstein, Wolfgang Pauli, and Vladimir Lenin. After graduation, Zwicky stayed on to pursue a degree in theoretical physics. His thesis applied ...
Massive Star Formation - Max-Planck
... the stellar IMF, with stellar masses being m∗ = c Mc , where c ∼ 0.5, perhaps set by protostellar outflow feedback (Matzner and McKee, 2000; see §2.4). This feature of some kind of one-to-one correspondence between the CMF and IMF is an underlying assumption of recent theories of the IMF, which pr ...
... the stellar IMF, with stellar masses being m∗ = c Mc , where c ∼ 0.5, perhaps set by protostellar outflow feedback (Matzner and McKee, 2000; see §2.4). This feature of some kind of one-to-one correspondence between the CMF and IMF is an underlying assumption of recent theories of the IMF, which pr ...
Annual Report 2014 - Max Planck Institute for Astrophysics
... the directorship of Ludwig Biermann. It was estab- MPA has had an internationally-recognized numerlished as an offshoot of the Max-Planck-Institut für ical astrophysics program that was long unparalPhysik, which at that time had just moved from leled by any other institution of similar size. Göttinge ...
... the directorship of Ludwig Biermann. It was estab- MPA has had an internationally-recognized numerlished as an offshoot of the Max-Planck-Institut für ical astrophysics program that was long unparalPhysik, which at that time had just moved from leled by any other institution of similar size. Göttinge ...
The birth rate of subluminous and overluminous type Ia supernovae
... mass model), while larger than the limit for DD model (superChandrasekhar mass model). The most remarkable property of SNe Ia is their apparently homogeneous nature. This characteristic is interpreted as the observable consequence of a model where the progenitors of SNe Ia are CO WDs that have incre ...
... mass model), while larger than the limit for DD model (superChandrasekhar mass model). The most remarkable property of SNe Ia is their apparently homogeneous nature. This characteristic is interpreted as the observable consequence of a model where the progenitors of SNe Ia are CO WDs that have incre ...
DEDUCING THE LIFETIME OF SHORT GAMMA
... host galaxies of short GRBs found so far are associated with old and massive galaxies with little current or recent star formation, which makes it unlikely that short bursts are associated with massive stars. Presently available data suggests, but not yet prove, a long time delay between the formati ...
... host galaxies of short GRBs found so far are associated with old and massive galaxies with little current or recent star formation, which makes it unlikely that short bursts are associated with massive stars. Presently available data suggests, but not yet prove, a long time delay between the formati ...
Liverpool Telescope 2: a new robotic facility for rapid transient follow
... explosion and the ensuing nucleosynthesis (e.g. the transition from deflagration to detonation). Turbulent deflagration models (Hillebrandt and Niemeyer, 2000; Röpke et al, 2007) of SNe Ia predict a large amount of unburned carbon and oxygen in the outer layers of the ejecta whereas delayed detonat ...
... explosion and the ensuing nucleosynthesis (e.g. the transition from deflagration to detonation). Turbulent deflagration models (Hillebrandt and Niemeyer, 2000; Röpke et al, 2007) of SNe Ia predict a large amount of unburned carbon and oxygen in the outer layers of the ejecta whereas delayed detonat ...
THE GREAT AGN DEBATE `AGN VS STARBURST
... – which had been sorely viewed with much skepticism until then – combined with the presence of a critical mass above which stability cannot be achieved, made the existence of stellar mass black holes inescapable’ (Ferrarese and Ford 2006, p.13) 14. There is strong observational evidence for the exis ...
... – which had been sorely viewed with much skepticism until then – combined with the presence of a critical mass above which stability cannot be achieved, made the existence of stellar mass black holes inescapable’ (Ferrarese and Ford 2006, p.13) 14. There is strong observational evidence for the exis ...
The Milky Way - The Independent School
... central black holes! Several million, up to more than a billion solar masses! Supermassive ...
... central black holes! Several million, up to more than a billion solar masses! Supermassive ...
Classification of Variable Stars
... V1668 Cyg. These are stars in constellations for which all of the letter combinations have been exhausted. (i.e. V746 Oph is the 746th variable to be discovered in Ophiuchus.) Variable star names are determined by a committee appointed by the International Astronomical Union (I.A.U.). The assignment ...
... V1668 Cyg. These are stars in constellations for which all of the letter combinations have been exhausted. (i.e. V746 Oph is the 746th variable to be discovered in Ophiuchus.) Variable star names are determined by a committee appointed by the International Astronomical Union (I.A.U.). The assignment ...
radioactive 26a1 in the galaxy: observations versus theory
... target for the HEAO-3 detectors. Moreover it was pointed out that, because of its long mean life, 26A1 would have enough time to be thermalised in the interstellar medium; therefore, it would de-excite essentially at rest and emit a narrow line, making easier its detection and identification with su ...
... target for the HEAO-3 detectors. Moreover it was pointed out that, because of its long mean life, 26A1 would have enough time to be thermalised in the interstellar medium; therefore, it would de-excite essentially at rest and emit a narrow line, making easier its detection and identification with su ...
U P C NIVERSITAT
... 2011fe and 2014J, no normal stellar progenitor has ever been directly identified. Overall, the challenging, unsolved stellar progenitor problem for SNe Ia stands in marked contrast to the case of core-collapse supernovae, whose stellar progenitors are highly-luminous, massive stars. Observational ev ...
... 2011fe and 2014J, no normal stellar progenitor has ever been directly identified. Overall, the challenging, unsolved stellar progenitor problem for SNe Ia stands in marked contrast to the case of core-collapse supernovae, whose stellar progenitors are highly-luminous, massive stars. Observational ev ...
Introduction_to_pulsar_astronomy
... radius of these objects. They predicted radii of the order of 10 km! Such small objects should be undetectable by any telescope at the vast distances to the nearest supernova remnants (normally many thousands of light-years). ...
... radius of these objects. They predicted radii of the order of 10 km! Such small objects should be undetectable by any telescope at the vast distances to the nearest supernova remnants (normally many thousands of light-years). ...
A Budget and Accounting of Metals at z~ 0: Results from the COS
... for high-ionization gas and in Werk et al. (2013) for lowionization gas. Tumlinson et al. (2011) reported that the mass of oxygen traced by the highly ionized O VI in the CGM of star-forming galaxies is comparable to the mass of oxygen in their ISM. COS-Halos has specifically addressed the metal con ...
... for high-ionization gas and in Werk et al. (2013) for lowionization gas. Tumlinson et al. (2011) reported that the mass of oxygen traced by the highly ionized O VI in the CGM of star-forming galaxies is comparable to the mass of oxygen in their ISM. COS-Halos has specifically addressed the metal con ...
Power Point Presentation
... The data seem to indicate two kinds of GRBs • Those with burst durations less than 2 seconds • Those with burst durations more than 2 seconds Short bursts have no detectable afterglows so far as predicted by the NS/NS merger model Long bursts are sometimes associated with supernovae, and all the aft ...
... The data seem to indicate two kinds of GRBs • Those with burst durations less than 2 seconds • Those with burst durations more than 2 seconds Short bursts have no detectable afterglows so far as predicted by the NS/NS merger model Long bursts are sometimes associated with supernovae, and all the aft ...
SUPERNOVA REMNANT SHOCKS IN AN INHOMOGENEOUS
... Smith 1974). If the filling factor fh of the hot gas is large (fh >, §), the ISM is a three phase medium with cold and warm clouds embedded in the hot gas; SNRs expand primarily in the hot gas and determine the pressure of the ISM (McKee and Ostriker 1977). Although fh is high in the local ISM, its ...
... Smith 1974). If the filling factor fh of the hot gas is large (fh >, §), the ISM is a three phase medium with cold and warm clouds embedded in the hot gas; SNRs expand primarily in the hot gas and determine the pressure of the ISM (McKee and Ostriker 1977). Although fh is high in the local ISM, its ...
Supernova
A supernova is a stellar explosion that briefly outshines an entire galaxy, radiating as much energy as the Sun or any ordinary star is expected to emit over its entire life span, before fading from view over several weeks or months. The extremely luminous burst of radiation expels much or all of a star's material at a velocity of up to 7007300000000000000♠30,000 km/s (10% of the speed of light), driving a shock wave into the surrounding interstellar medium. This shock wave sweeps up an expanding shell of gas and dust called a supernova remnant. Supernovae are potentially strong galactic sources of gravitational waves. A great proportion of primary cosmic rays comes from supernovae.Supernovae are more energetic than novae. Nova means ""new"" in Latin, referring to what appears to be a very bright new star shining in the celestial sphere; the prefix ""super-"" distinguishes supernovae from ordinary novae, which are far less luminous. The word supernova was coined by Walter Baade and Fritz Zwicky in 1931. It is pronounced /ˌsuːpərnoʊvə/ with the plural supernovae /ˌsuːpərnoʊviː/ or supernovas (abbreviated SN, plural SNe after ""supernovae"").Supernovae can be triggered in one of two ways: by the sudden re-ignition of nuclear fusion in a degenerate star; or by the gravitational collapse of the core of a massive star. In the first case, a degenerate white dwarf may accumulate sufficient material from a companion, either through accretion or via a merger, to raise its core temperature, ignite carbon fusion, and trigger runaway nuclear fusion, completely disrupting the star. In the second case, the core of a massive star may undergo sudden gravitational collapse, releasing gravitational potential energy that can create a supernova explosion.The most recent directly observed supernova in the Milky Way was Kepler's Star of 1604 (SN 1604); remnants of two more recent supernovae have been found retrospectively. Observations in other galaxies indicate that supernovae should occur on average about three times every century in the Milky Way, and that any galactic supernova would almost certainly be observable in modern astronomical equipment. Supernovae play a significant role in enriching the interstellar medium with higher mass elements. Furthermore, the expanding shock waves from supernova explosions can trigger the formation of new stars.