Prospects for far infrared arrays     

G. H. Rieke  E. T. Young 《Experimental Astronomy》1994,3(1-4):265-271

We report initial performance measurements of a 1/8 scale version of a 32×32 pixel array under development for SIRTF. This array demonstrates that we can reach the sensitivity limits set by the natural backgrounds in space while providing good imaging and photometric performance. Based on the achieved performance levels, we project the imaging capabilities of SIRTF in the far infrared to exceed by a factor of more than 10,000 those achieved by any preceding telescope.  相似文献   

Chromospheric activity and unique solution of SZ Psc     

Young Woon Kang  Woo-Baik Lee  Ho-il Kim  Kyu-Dong Oh 《Monthly notices of the Royal Astronomical Society》2003,344(4):1227-1232

  相似文献   

Finding KBO Flyby Targets for New Horizons     

Spencer  John  Buie  Marc  Young  Leslie  Guo  Yanping  Stern  Alan 《Earth, Moon, and Planets》2003,92(1-4):483-491

Development of the New Horizons mission to Pluto and the Kuiper Belt is now fully funded by NASA (Stern and Spencer, this volume). If all goes well, New Horizons will be launched in January 2006, followed by a Jupiter gravity assist in 2007, with Pluto arrival expected in either 2015 or 2016, depending on the launch vehicle chosen. A backup launch date of early 2007, without a Jupiter flyby, would give a Pluto arrival in 2019 or 2020. In either case, a flyby of at least one Kuiper Belt object (KBO) is planned following the Pluto encounter, sometime before the spacecraft reaches a heliocentric distance of 50 AU, in 2021 or 2023 for the 2006 launch, and 2027 or 2029 for the 2007 launch. However, none of the almost 1000 currently-known KBOs will pass close enough to the spacecraft trajectory to be targeted by New Horizons, so the KBO flyby depends on finding a suitable target among the estimated 500,000 KBOs larger than 40 km in diameter. This paper discusses the issues involved in finding one or more KBO targets for New Horizons. The New Horizons team plans its own searches for mission KBOs but will welcome other U.S, or international team who wish to become involved in exchange for mission participation at the KBO.  相似文献   

Total magnitudes of Virgo galaxies – III. Scale errors in the Reference Catalogue of Bright Galaxies T system and light-profile distortion by resolution-degrading and differential-distance effects     

Christopher Ke-shih Young 《Monthly notices of the Royal Astronomical Society》2004,354(4):1011-1019

  相似文献   

Gravity waves in Jupiter's stratosphere, as measured by the Galileo ASI experiment     

Leslie A. Young  Roger V. Yelle  Alvin Seiff  Donn B. Kirk 《Icarus》2005,173(1):185-199

  相似文献   

The hard X-ray spectrum of the Seyfert galaxy IRAS 18325–5926: reflection from an ionized disc and variable iron K emission     

K. Iwasawa  J. C. Lee †  A. J. Young  C. S. Reynolds  A. C. Fabian 《Monthly notices of the Royal Astronomical Society》2004,347(2):411-420

  相似文献   

Solar wind interactions with Comet 19P/Borrelly     

D.T Young  F.J Crary  J.E Nordholt  D Boice  A Eviatar  J.J Hanley  D.J McComas  D Reisenfeld  R.C Wiens 《Icarus》2004,167(1):80-88

The Plasma Experiment for Planetary Exploration (PEPE) made detailed observations of the plasma environment of Comet 19P/Borrelly during the Deep Space 1 (DS1) flyby on September 22, 2001. Several distinct regions and boundaries have been identified on both inbound and outbound trajectories, including an upstream region of decelerated solar wind plasma and cometary ion pickup, the cometary bow shock, a sheath of heated and mixed solar wind and cometary ions, and a collisional inner coma dominated by cometary ions. All of these features were significantly offset to the north of the nucleus-Sun line, suggesting that the coma itself produces this offset, possibly because of well-collimated large dayside jets directed 8°-10° northward from the nucleus as observed by the DS1 MICAS camera. The maximum observed ion density was 1640 ion/cm³ at a distance of 2650 km from the nucleus while the flow speed dropped from 360 km/s in the solar wind to 8 km/s at closest approach. Preliminary analysis of PEPE mass spectra suggest that the ratio of CO⁺/H₂O⁺ is lower than that observed with Giotto at 1P/Halley.  相似文献   

Response of a global atmospheric forecast model to various drag parametrizations     

YOUNG-JOON KIM  TIMOTHY F. HOGAN 《地球，A辑:动力气象学与海洋学》2004,56(5):472-484

  相似文献   

A spectropolarimetric atlas of Seyfert 1 galaxies   总被引：1，自引：0，他引：1  

J. E. Smith  S. Young  A. Robinson    E. A. Corbett  M. E. Giannuzzo    D. J. Axon  J. H. Hough 《Monthly notices of the Royal Astronomical Society》2002,335(3):773-798

  相似文献   

Summertime Siberian CO₂ simulations with the regional transport model MATCH: a feasibility study of carbon uptake calculations from EUROSIB data     

ERIK KJELLSTRÖM  KIM HOLMÉN  KRISTINA ENEROTH  MAGNUZ ENGARDT 《Tellus. Series B, Chemical and physical meteorology》2002,54(5):834-849

  相似文献