The gravitational wave background from neutron star birth throughout the cosmos     

E. Howell  D. Coward  R. Burman  D. Blair  J. Gilmore 《Monthly notices of the Royal Astronomical Society》2004,351(4):1237-1246

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Substructure analysis of selected low-richness 2dFGRS clusters of galaxies     

William S. Burgett  Michael M. Vick  David S. Davis  Matthew Colless  Roberto De Propris  Ivan Baldry  Carlton Baugh  Joss Bland-Hawthorn  Terry Bridges  Russell Cannon  Shaun Cole  Chris Collins  Warrick Couch  Nicholas Cross  Gavin Dalton  Simon Driver  George Efstathiou  Richard Ellis  Carlos S. Frenk  Karl Glazebrook  Edward Hawkins  Carole Jackson  Ofer Lahav  Ian Lewis  Stuart Lumsden  Steve Maddox  Darren Madgwick  Peder Norberg  John A. Peacock  Will Percival  Bruce Peterson  Will Sutherland  Keith Taylor 《Monthly notices of the Royal Astronomical Society》2004,352(2):605-654

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Metallicity effects on open cluster dynamics     

Jarrod R. Hurley  Christopher A. Tout  Sverre J. Aarseth  Onno R. Pols 《Monthly notices of the Royal Astronomical Society》2004,355(4):1207-1216

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Finding structures in photometric redshift galaxy surveys: an extended friends-of-friends algorithm     

C. S. Botzler  J. Snigula  R. Bender  U. Hopp 《Monthly notices of the Royal Astronomical Society》2004,349(2):425-439

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Interpreting the colour–magnitude diagrams of open star clusters through numerical simulations     

Jasonjot Singh Kalirai  Monica Tosi 《Monthly notices of the Royal Astronomical Society》2004,351(2):649-662

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The radial velocity of the companion star in the low-mass X-ray binary 2S 0921–630: limits on the mass of the compact object     

P. G. Jonker †  D. Steeghs  G. Nelemans  M. van der Klis 《Monthly notices of the Royal Astronomical Society》2005,356(2):621-626

In this paper we report on optical spectroscopic observations of the low-mass X-ray binary 2S 0921–630 obtained with the Very Large Telescope. We found sinusoidal radial velocity variations of the companion star with a semi-amplitude of  99.1 ± 3.1 km s⁻¹  modulated on a period of 9.006 ± 0.007 d, consistent with the orbital period found previously for this source, and a systemic velocity of  44.4 ± 2.4 km s⁻¹  . Owing to X-ray irradiation, the centre of light measured by the absorption lines from the companion star is probably shifted with respect to the centre of mass. We try to correct for this using the so-called K -correction. Conservatively applying the maximum correction possible and using the previously measured rotational velocity of the companion star, we find a lower limit to the mass of the compact object in 2S 0921–630 of   M_X sin³ i > 1.90 ± 0.25 M_⊙  (1σ errors). The inclination in this system is well constrained since partial eclipses have been observed in X-ray and optical bands. For inclinations in the range  60° < i < 90°  we find  1.90 ± 0.25 < M_X < 2.9 ± 0.4 M_⊙  . However, using this maximum K -correction we find that the ratio between the mass of the companion star and that of the compact object, q , is 1.32 ± 0.37, implying super-Eddington mass-transfer rates; however, evidence for that has not been found in 2S 0921–630. We conclude that the compact object in 2S 0921–630 is either a (massive) neutron star or a low-mass black hole.  相似文献   

A new algorithm for the detection of intercluster galaxy filaments using galaxy orientation alignments     

Kevin A. Pimbblet 《Monthly notices of the Royal Astronomical Society》2005,358(1):256-262

We present a new algorithm for detecting intercluster galaxy filaments based upon the assumption that the orientations of constituent galaxies along such filaments are non-isotropic. We apply the algorithm to the 2dF Galaxy Redshift Survey catalogue and find that it readily detects many straight filaments between close cluster pairs. At large intercluster separations  (≫15  h ⁻¹ Mpc)  , we find that the detection efficiency falls quickly, as it also does with more complex filament morphologies. We explore the underlying assumptions and suggest that it is only in the case of close cluster pairs that we can expect galaxy orientations to be significantly correlated with filament direction.  相似文献   

Constraints on the ionization sources of the high-redshift intergalactic medium     

Avery Meiksin 《Monthly notices of the Royal Astronomical Society》2005,356(2):596-606

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Analytical Study of Supernova Remnant Non-Stationary Expansions     

X. Ribeyre  V. T. Tikhonchuk  S. Bouquet 《Astrophysics and Space Science》2005,298(1-2):75-80

We study analytically the Rayleigh–Taylor instability in expanding supernova gas shell. The instability appears at the inner shell surface accelerated by blowing pulsar wind. The most dangerous perturbations correspond to wavelengths comparable to the shell thickness. We analyze the fragility of the supernova remnant shell in function of the initial perturbation amplitude and the shell thickness.  相似文献   

Centaurs from the Oort cloud and the origin of Jupiter-family comets     

V. V. Emel'yanenko  D. J. Asher  M. E. Bailey 《Monthly notices of the Royal Astronomical Society》2005,361(4):1345-1351

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