Study of variable stars in the MOA data base: long-period red variables in the Large Magellanic Cloud – II. Multiplicity of the period–luminosity relation     

S. Noda  M. Takeuti  F. Abe  I. A. Bond  R. J. Dodd  J. B. Hearnshaw  M. Honda  M. Honma  J. Jugaku  Y. Kan-ya  Y. Kato  P. M. Kilmartin  Y. Matsubara  K. Masuda  Y. Muraki  T. Nakamura  K. Ohnishi  M. Reid  N. J. Rattenbury  To. Saito  Y. Saito  H. Sato  M. Sekiguchi  J. Skuljan  D. J. Sullivan  T. Sumi  R. Yamada  T. Yanagisawa  P. C. M. Yock  M. Yoshizawa 《Monthly notices of the Royal Astronomical Society》2004,348(4):1120-1134

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The AAO/UKST SuperCOSMOS Hα survey     

Quentin A. Parker  S. Phillipps  M. J. Pierce  M. Hartley  N. C. Hambly  M. A. Read  H. T. MacGillivray  S. B. Tritton  C. P. Cass  R. D. Cannon  M. Cohen  J. E. Drew  D. J. Frew  E. Hopewell  S. Mader  D. F. Malin  M. R. W. Masheder  D. H. Morgan  R. A. H. Morris  D. Russeil  K. S. Russell  R. N. F. Walker 《Monthly notices of the Royal Astronomical Society》2005,362(2):689-710

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The Southern SHARC catalogue: a ROSAT survey for distant galaxy clusters     

D. J. Burke  C. A. Collins  R. M. Sharples  A. K. Romer  R. C. Nichol 《Monthly notices of the Royal Astronomical Society》2003,341(4):1093-1108

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1988年至1995年IERS天球参考架的指向维持     

李金岭  金文敬 《天文研究与技术》1996,(4)

本文分析了１９９２年至１９９５年期间国际地球自转服务（ＩＥＲＳ）天球参考架的指向维持情况，结合１９８８年至１９９２年的指向维持情况指出，该参考架在１９８８年至１９９５年期间历年的指向均存在显著变化，赤经零点和天极的最大年度漂移约为０．４ｍａｓ。至１９９５年，ＩＥＲＳ天球参考架的赤经零点和天极与各自预期位置的偏差不于０．４ｍａｓ。１９９４年和１９９５年的ＩＥＲＳ天球参考架基本上维持了１９９３年的ＩＥＲＳ天球参考指向，但是其实际维持精度约为０．０５ｍａｓ，并非０．００５ｍａｓ。０．００５ｍａｓ的维持精度只是数学上的平均效果，相当一部分基本源在相邻年度的ＩＥＲＳ天球参考架中的坐标差大于０．５ｍａｓ，这说明只有采用恰当的消除局部相对形变的方法，才能将天球参考架的指向真正维持在较高水平。  相似文献   

The Northern HIPASS catalogue – data presentation, completeness and reliability measures     

O. I. Wong  E. V. Ryan-Weber  D. A. Garcia-Appadoo  R. L. Webster  L. Staveley-Smith  M. A. Zwaan  M. J. Meyer  D. G. Barnes  V. A. Kilborn  R. Bhathal  W. J. G. de Blok  M. J. Disney  M. T. Doyle  M. J. Drinkwater  R. D. Ekers  K. C. Freeman  B. K. Gibson  S. Gurovich  J. Harnett  P. A. Henning  H. Jerjen  M. J. Kesteven  P. M. Knezek  B. S. Koribalski  S. Mader  M. Marquarding  R. F. Minchin  J. O'Brien  M. E. Putman  S. D. Ryder  E. M. Sadler  J. Stevens  I. M. Stewart  F. Stootman  M. Waugh 《Monthly notices of the Royal Astronomical Society》2006,371(4):1855-1864

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The Millennium Galaxy Catalogue: star counts and the structure of the Galactic stellar halo     

D. J. Lemon  Rosemary F. G. Wyse †  J. Liske  S. P. Driver  Keith Horne 《Monthly notices of the Royal Astronomical Society》2004,347(4):1043-1054

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Automated classification of variable stars for All-Sky Automated Survey 1–2 data     

L. Eyer  C. Blake 《Monthly notices of the Royal Astronomical Society》2005,358(1):30-38

With the advent of surveys generating multi-epoch photometry and the discovery of large numbers of variable stars, the classification of these stars has to be automatic. We have developed such a classification procedure for about 1700 stars from the variable star catalogue of the All-Sky Automated Survey 1–2 (ASAS 1–2) by selecting the periodic stars and by applying an unsupervised Bayesian classifier using parameters obtained through a Fourier decomposition of the light curve. For irregular light curves we used the period and moments of the magnitude distribution for the classification. In the case of ASAS 1–2, 83 per cent of variable objects are red giants. A general relation between the period and amplitude is found for a large fraction of those stars. The selection led to 302 periodic and 1429 semiperiodic stars, which are classified in six major groups: eclipsing binaries, 'sinusoidal curves', Cepheids, small amplitude red variables, SR and Mira stars. The type classification error level is estimated to be about 7 per cent.  相似文献   

New ultracool and halo white dwarf candidates in SDSS Stripe 82     

S. Vidrih  D. M. Bramich  P. C. Hewett  N. W. Evans  G. Gilmore  S. Hodgkin  M. Smith  L. Wyrzykowski  V. Belokurov  M. Fellhauer  M. J. Irwin  R. G. McMahon  D. Zucker  J. A. Munn  H. Lin  G. Miknaitis  H. C. Harris  R. H. Lupton  D. P. Schneider 《Monthly notices of the Royal Astronomical Society》2007,382(2):515-525

A     region along the celestial equator (Stripe 82) has been imaged repeatedly from 1998 to 2005 by the Sloan Digital Sky Survey (SDSS). A new catalogue of ∼4 million light-motion curves, together with over 200 derived statistical quantities, for objects in Stripe 82 brighter than   r ∼21.5  has been constructed by combining these data by Bramich et al. This catalogue is at present the deepest catalogue of its kind. Extracting ∼130 000 objects with highest signal-to-noise ratio proper motions, we build a reduced proper motion diagram to illustrate the scientific promise of the catalogue. In this diagram, disc and halo subdwarfs are well-separated from the cool white dwarf sequence. Our sample of 1049 cool white dwarf candidates includes at least eight and possibly 21 new ultracool H-rich white dwarfs  ( T _eff < 4000 K)  and one new ultracool He-rich white dwarf candidate identified from their SDSS optical and UKIDSS infrared photometry. At least 10 new halo white dwarfs are also identified from their kinematics.  相似文献   

The optical and near-infrared properties of 2837 quasars in the United Kingdom Infrared Telescope Infrared Deep Sky Survey     

Kuenley Chiu  Gordon T. Richards  Paul C. Hewett  Natasha Maddox 《Monthly notices of the Royal Astronomical Society》2007,375(4):1180-1188

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Radio imaging of the Subaru/XMM–Newton Deep Field – I. The 100-μJy catalogue, optical identifications, and the nature of the faint radio source population     

Chris Simpson  Alejo Martínez-Sansigre  Steve Rawlings  Rob Ivison  Masayuki Akiyama  Kazuhiro Sekiguchi  Tadafumi Takata  Yoshihiro Ueda  Mike Watson 《Monthly notices of the Royal Astronomical Society》2006,372(2):741-757

We describe deep radio imaging at 1.4 GHz of the 1.3-deg² Subaru/ XMM–Newton Deep Field (SXDF), made with the Very Large Array in B and C configurations. We present a radio map of the entire field, and a catalogue of 505 sources covering 0.8 deg² to a peak flux density limit of 100 μJy. Robust optical identifications are provided for 90 per cent of the sources, and suggested identifications are presented for all but 14 (of which seven are optically blank, and seven are close to bright contaminating objects). We show that the optical properties of the radio sources do not change with flux density, suggesting that active galactic nuclei (AGN) continue to contribute significantly at faint flux densities. We test this assertion by cross-correlating our radio catalogue with the X-ray source catalogue and conclude that radio-quiet AGN become a significant population at flux densities below 300 μJy, and may dominate the population responsible for the flattening of the radio source counts if a significant fraction of them are Compton-thick.  相似文献