WSokolov-PROTVINO
... Gamma-ray bursts belong to the most distant observable objects with measurable redshift. Gamma-ray bursts are related to the star formation in distant (and very distant) galaxies. Gamma-ray bursts and their afterglows also allow us seeing the most distant explosions of massive stars at the end of th ...
... Gamma-ray bursts belong to the most distant observable objects with measurable redshift. Gamma-ray bursts are related to the star formation in distant (and very distant) galaxies. Gamma-ray bursts and their afterglows also allow us seeing the most distant explosions of massive stars at the end of th ...
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 ...
banff04
... HH 80-81 like jets may be possible in more massive stars (up to late O spectral type) ...
... HH 80-81 like jets may be possible in more massive stars (up to late O spectral type) ...
Elliptical Galaxies
... to small groups; truely isolated ellipticals being relatively rare. Figure 1 shows the central region of the Coma cluster which is dominated by a population of ellipticals. The most luminous elliptical galaxies are amongst the brightest galaxies we know of and this, combined with their apparent simp ...
... to small groups; truely isolated ellipticals being relatively rare. Figure 1 shows the central region of the Coma cluster which is dominated by a population of ellipticals. The most luminous elliptical galaxies are amongst the brightest galaxies we know of and this, combined with their apparent simp ...
Uncovering the nucleus candidate for NGC 253
... Davies et al. 2014). Theses speculations are due mostly to the fact that an increasing number of the neighboring galaxies, as revealed by new observations, contain starbursts and active galactic nuclei (AGNs) in close proximity (see Levenson et al. 2001 and references therein). It remains unclear wh ...
... Davies et al. 2014). Theses speculations are due mostly to the fact that an increasing number of the neighboring galaxies, as revealed by new observations, contain starbursts and active galactic nuclei (AGNs) in close proximity (see Levenson et al. 2001 and references therein). It remains unclear wh ...
elt science case
... are required to test and fully calibrate this correlation. Clearly the extension of the sample in the coming years will also extend the present GRB redshift limit to higher values. This will offer the unprecedented opportunity to investigate the nature of dark energy beyond what can be reached by SN ...
... are required to test and fully calibrate this correlation. Clearly the extension of the sample in the coming years will also extend the present GRB redshift limit to higher values. This will offer the unprecedented opportunity to investigate the nature of dark energy beyond what can be reached by SN ...
Observational evidence for AGN feedback in early
... inspection which produces a sample that is not biased against recent star formation and nuclear activity. Based on the nebular emission-line characteristics we separate between star formation activity, black hole activity, the composite of the two and quiescence. We find that emission is mostly LINE ...
... inspection which produces a sample that is not biased against recent star formation and nuclear activity. Based on the nebular emission-line characteristics we separate between star formation activity, black hole activity, the composite of the two and quiescence. We find that emission is mostly LINE ...
the Ëg infrared search for extraterrestrial civilizations with large
... Most relevant to the present paper are the parameters γ (waste heat luminosity, expressed as a fraction of the starlight available to the civilization) and Twaste , the characteristic temperature of the waste heat (which dictates its infrared colors). For values of Twaste in the 100–600 K range, val ...
... Most relevant to the present paper are the parameters γ (waste heat luminosity, expressed as a fraction of the starlight available to the civilization) and Twaste , the characteristic temperature of the waste heat (which dictates its infrared colors). For values of Twaste in the 100–600 K range, val ...
Harikane
... is 80-260 km/s. • This outflow velocity is comparable to the escape velocity, implying that the some fraction of outflowing gas would escape. • [OII]Blob 10 is likely to be a composite of an AGN and star-forming regions. ...
... is 80-260 km/s. • This outflow velocity is comparable to the escape velocity, implying that the some fraction of outflowing gas would escape. • [OII]Blob 10 is likely to be a composite of an AGN and star-forming regions. ...
Giant Low Surface Brightness Galaxies
... properties such as extended HI disks, confirm that they are extreme late type spirals. The really large LSB galaxies are usually referred to as Giant LSB (GLSB) galaxies and are generally isolated systems (Bothun et al. 1993). They are found to lie closer to the walls of voids (Rosenbaum et al. 2009 ...
... properties such as extended HI disks, confirm that they are extreme late type spirals. The really large LSB galaxies are usually referred to as Giant LSB (GLSB) galaxies and are generally isolated systems (Bothun et al. 1993). They are found to lie closer to the walls of voids (Rosenbaum et al. 2009 ...
U P C NIVERSITAT
... Because of their well known observational properties Type Ia, or thermonuclear, supernovae are used as standard candles, and have allowed the discovery of the accelerating expansion of the Universe. Yet, despite their importance, we still do not know exactly which stellar systems produce them. Howev ...
... Because of their well known observational properties Type Ia, or thermonuclear, supernovae are used as standard candles, and have allowed the discovery of the accelerating expansion of the Universe. Yet, despite their importance, we still do not know exactly which stellar systems produce them. Howev ...
Swanning Around with Chandra Star and Planet Formation in Cygnus OB2 N. Wright
... The Chandra Cygnus OB2 survey provides the best evidence to date that OB stars severely affect the evolution of the birthplaces of planets ...
... The Chandra Cygnus OB2 survey provides the best evidence to date that OB stars severely affect the evolution of the birthplaces of planets ...
Properties of simulated Milky Way-mass galaxies in loose group and
... addition to a static refinement of nested regions that reduces the run-time while maintaining high resolution around the galaxy of interest. Details of the refinement scheme are described by Teyssier (2002). ramses includes density- and metallicitydependent radiative cooling rates, using an ionisati ...
... addition to a static refinement of nested regions that reduces the run-time while maintaining high resolution around the galaxy of interest. Details of the refinement scheme are described by Teyssier (2002). ramses includes density- and metallicitydependent radiative cooling rates, using an ionisati ...
as a PDF - Living Reviews in Solar Physics
... Solar magnetic fields control essentially the entire outer solar atmosphere, they heat coronal gas to millions of degrees, they produce flares whose by-products such as shock waves and high-energy particles travel through interplanetary space to eventually interact with planetary atmospheres; the so ...
... Solar magnetic fields control essentially the entire outer solar atmosphere, they heat coronal gas to millions of degrees, they produce flares whose by-products such as shock waves and high-energy particles travel through interplanetary space to eventually interact with planetary atmospheres; the so ...
A re-examination of galactic conformity and a comparison with semi
... 4 Mpc, well beyond the virial radii of their dark matter haloes. For low-mass central galaxies, conformity with neighbours on very large scales is only seen when they have low star formation rate or gas content. In contrast, at high stellar masses, conformity with neighbours applies in the gas-rich ...
... 4 Mpc, well beyond the virial radii of their dark matter haloes. For low-mass central galaxies, conformity with neighbours on very large scales is only seen when they have low star formation rate or gas content. In contrast, at high stellar masses, conformity with neighbours applies in the gas-rich ...
The Ionized Nebula surrounding the Red Supergiant W26 in
... line spectrum (Levesque et al. 2009). This is all consistent with W26 being a very evolved RSG with a greater level of instability and higher mass-loss rate than typical RSGs. Ionized nebulae have never previously been resolved around RSGs as their photospheres are too cool to produce ionizing photo ...
... line spectrum (Levesque et al. 2009). This is all consistent with W26 being a very evolved RSG with a greater level of instability and higher mass-loss rate than typical RSGs. Ionized nebulae have never previously been resolved around RSGs as their photospheres are too cool to produce ionizing photo ...
Morphology and Environment
... along the Sa – Sb – Sc sequence collapse into a coarse scheme of ‘early’ (S ), ‘intermediate’ (S), and ‘late’ (S+ ) types at lower luminosities. At very low luminosities only rough distinctions between E, S, and Ir galaxies can be recognized. In the ‘trident’ diagram (Fig. 2.2) the horizontal axis i ...
... along the Sa – Sb – Sc sequence collapse into a coarse scheme of ‘early’ (S ), ‘intermediate’ (S), and ‘late’ (S+ ) types at lower luminosities. At very low luminosities only rough distinctions between E, S, and Ir galaxies can be recognized. In the ‘trident’ diagram (Fig. 2.2) the horizontal axis i ...
Ultra-luminous Quasars with the Most Massive Black Holes at
... The first low-resolution optical spectrum of this source was obtained with the Lijiang 2.4 m telescope using the YFOSC on 2013 November 25 (UT), then follow-up by Magellan. ...
... The first low-resolution optical spectrum of this source was obtained with the Lijiang 2.4 m telescope using the YFOSC on 2013 November 25 (UT), then follow-up by Magellan. ...
THE ORION NEBULA AND ITS ASSOCIATED POPULATION C. R. O
... The Dark Bay is the best illustration that there are regions of visual wavelength high optical depth between the observer and the MIF. The fact that it is extinction and not an absence of emission is established by the continued recombination radio emission in that area (Wilson et al. 1997). Those r ...
... The Dark Bay is the best illustration that there are regions of visual wavelength high optical depth between the observer and the MIF. The fact that it is extinction and not an absence of emission is established by the continued recombination radio emission in that area (Wilson et al. 1997). Those r ...
L117 SHOCK-HEATED NH3 IN A MOLECULAR JET ASSOCIATED
... IRAS 2012614106 is a young star lying in the Cygnus X complex at a distance of 1.7 kpc (Wilking et al. 1989). Its luminosity of 1.3 # 10 4 L, corresponds to a zero-age mainsequence star of spectral type B0.2. Despite the high luminosity, sensitive observations with the VLA have failed to detect a ra ...
... IRAS 2012614106 is a young star lying in the Cygnus X complex at a distance of 1.7 kpc (Wilking et al. 1989). Its luminosity of 1.3 # 10 4 L, corresponds to a zero-age mainsequence star of spectral type B0.2. Despite the high luminosity, sensitive observations with the VLA have failed to detect a ra ...
Astronomy Astrophysics Spectral energy distributions of an AKARI-SDSS-GALEX sample of galaxies
... derives physical information about galaxies by fitting their UVto-far-IR SED (Noll et al. 2009b; Giovannoli et al. 2010). A Bayesian analysis is used to derive galaxy properties similar to that developed by Kauffmann et al. (2003a). CIGALE combines a UV-optical stellar SED and a dust, IR-emitting com ...
... derives physical information about galaxies by fitting their UVto-far-IR SED (Noll et al. 2009b; Giovannoli et al. 2010). A Bayesian analysis is used to derive galaxy properties similar to that developed by Kauffmann et al. (2003a). CIGALE combines a UV-optical stellar SED and a dust, IR-emitting com ...
... The paper does not state how the target sample was selected, so that rates of occurence cannot be inferred. A new member of the small class of PNe with extended shells and a compact, high density core was found (Miranda et al. 2014), joining objects such as KjPn 8, EGB 6 and M 2-29. The core of Hb 1 ...
Multiple Jets from the High-Mass (Proto) stellar Cluster AFGL5142
... at 225 GHz and 8.4 GHz. The 225 GHz continuum emission reveals three prominent peaks MM-1, MM-2 and MM-3 with estimated circumstellar material of 3, 3, and 2 M⊙ , respectively. MM-1 and MM-2 are associated with strong CH3 CN emission with temperatures of 90 ± 20 and 250 ± 40 K, respectively, while b ...
... at 225 GHz and 8.4 GHz. The 225 GHz continuum emission reveals three prominent peaks MM-1, MM-2 and MM-3 with estimated circumstellar material of 3, 3, and 2 M⊙ , respectively. MM-1 and MM-2 are associated with strong CH3 CN emission with temperatures of 90 ± 20 and 250 ± 40 K, respectively, while b ...
Astrophysical X-ray source
Astrophysical X-ray sources are astronomical objects with physical properties which result in the emission of X-rays.There are a number of types of astrophysical objects which emit X-rays, from galaxy clusters, through black holes in active galactic nuclei (AGN) to galactic objects such as supernova remnants, stars, and binary stars containing a white dwarf (cataclysmic variable stars and super soft X-ray sources), neutron star or black hole (X-ray binaries). Some solar system bodies emit X-rays, the most notable being the Moon, although most of the X-ray brightness of the Moon arises from reflected solar X-rays. A combination of many unresolved X-ray sources is thought to produce the observed X-ray background. The X-ray continuum can arise from bremsstrahlung, either magnetic or ordinary Coulomb, black-body radiation, synchrotron radiation, inverse Compton scattering of lower-energy photons be relativistic electrons, knock-on collisions of fast protons with atomic electrons, and atomic recombination, with or without additional electron transitions.Furthermore, celestial entities in space are discussed as celestial X-ray sources. The origin of all observed astronomical X-ray sources is in, near to, or associated with a coronal cloud or gas at coronal cloud temperatures for however long or brief a period.