AR King,RE Taam,MC Begelman
AR King
We consider possible evolutionary models for SS 433. We assume that common envelope evolution is avoided if radiation pressure is able to expel most of a super-Eddington accretion flow from a region smaller than the accretor's Roche lobe. T...
Ultracompact X-Ray Binaries in Globular Clusters: Variability of the Optical Counterpart of X1832-330 in NGC 6652 [0.03%]
球状星团NGC 6652中超紧凑型X射线双星X1832-330的光学对应体的光变性研究
EW Deutsch,B Margon,SF Anderson
EW Deutsch
Evidence is emerging that the luminous X-ray sources in the cores of globular clusters may often consist of, or perhaps even as a class be dominated by, ultracompact (P less, similar1 hr) binary stars. To the two such systems already known,...
The Dwarf Irregular Galaxy UGC 7636 Exposed: Stripping at Work in the Virgo Cluster [0.03%]
矮不规则星系UGC 7636的剥脱现象：Virgo星团中的恒星形成和演化
H Lee,MG Richer,ML McCall
H Lee
We present the results of optical spectroscopy of a newly discovered H ii region residing in the H i gas cloud located between the dwarf irregular galaxy UGC 7636 and the giant elliptical galaxy NGC 4472 in the Virgo Cluster. By comparing U...
Hubble Space Telescope and Very Large Array Observations of the H2O Gigamaser Galaxy TXS 2226-184 [0.03%]
哈勃空间望远镜和甚大阵对银河系TXS 2226-184中H2O吉赫兹频段微波放大器的研究
H Falcke,AS Wilson,C Henkel et al.
H Falcke et al.
We present Hubble Space Telescope/Wide-Field and Planetary Camera 2 images in Halpha + [N ii] lambdalambda6548, 6583 lines and continuum radiation and a VLA map at 8 GHz of the H2O gigamaser galaxy TXS 2226-184. This galaxy has the most lum...
Environment of the Gamma-Ray Burst GRB 971214: A Giant H ii Region Surrounded by a Galactic Supershell [0.03%]
伽玛射线暴GRB 971214的环境：被星系超级壳层包裹的大HII区域
SH Ahn
SH Ahn
Among a number of gamma-ray bursts whose host galaxies are known, GRB 971214 stands out for its high redshift (z>/=3) and the Lyalpha emission line having a P Cygni-type profile, which is interpreted to be a direct consequence of the expand...
Has Blending Compromised Cepheid-based Determinations of the Extragalactic Distance Scale? [0.03%]
混合对基于造父变星的宇宙距离标尺测定有影响吗？
BK Gibson,PR Maloney,S Sakai
BK Gibson
We examine the suggestion that half of the galaxies observed by the Hubble Space Telescope Key Project and the Type Ia Supernova Calibration Team have had their distances systematically underestimated, by 0.1-0.3 mag in the distance modulus...
B Jain,Van Waerbeke L
B Jain
We present a new approach to measure the mass function of dark matter halos and to discriminate models with differing values of Omega through weak gravitational lensing. We measure the distribution of peaks from simulated lensing surveys an...
In-Flight Determination of the Plate Scale of the Extreme-Ultraviolet Imaging Telescope [0.03%]
极紫外成像仪平板刻度的在轨确定方法研究
F Auchère,CE DeForest,G Artzner
F Auchère
Using simultaneous observations of the Michelson Doppler Imager and Extreme-Ultraviolet Imaging Telescope (EIT) on board the Solar and Heliospheric Observatory spacecraft, we determined in flight the plate scale of the EIT. We found a value...
SB Charnley,MJ Kaufman
SB Charnley
We consider the gas-phase chemistry of CO2 molecules in active regions. We show that CO2 molecules evaporated from dust in hot cores cannot be efficiently destroyed and are in fact copiously produced in cooler gas. When CO2-rich ices are sp...