Detection of Planetary Transits of the Star HD 209458 in the Hipparcos Data Set [0.03%]
在Hipparcos数据库中检测系外行星HD 209458的凌星现象
T Castellano,J Jenkins,DE Trilling et al.
T Castellano et al.
A search of the Hipparcos satellite photometry data for the star HD 209458 reveals evidence for a planetary transit signature consistent with the planetary properties reported by Henry et al. and Charbonneau et al. and allows further refine...
FA Rasio,ED Pfahl,S Rappaport
FA Rasio
We present a new dynamical scenario for the formation of short-period binary millisecond pulsars in globular clusters. Our work is motivated by the recent observations of 20 radio pulsars in 47 Tuc. In a dense cluster such as 47 Tuc, most n...
Discovery of High Proper-Motion Ancient White Dwarfs: Nearby Massive Compact Halo Objects? [0.03%]
高自行的古老白矮星的发现：附近巨大的晕族天体？
R Ibata,M Irwin,O Bienaymé et al.
R Ibata et al.
We present the discovery and spectroscopic identification of two very high proper-motion ancient white dwarf stars, found in a systematic proper-motion survey. Their kinematics and apparent magnitude clearly indicate that they are halo memb...
H Zhao,DS Graff,P Guhathakurta
H Zhao
There are lines of evidence suggesting that some of the observed microlensing events in the direction of the Large Magellanic Cloud (LMC) are caused by ordinary star lenses as opposed to dark MACHOs in the Galactic halo. Efficient lensing b...
SS Eikenberry,K Matthews,M Muno et al.
SS Eikenberry et al.
We present simultaneous infrared and X-ray observations of the Galactic microquasar GRS 1915+105 using the Palomar 5 m telescope and Rossi X-Ray Timing Explorer on 1998 July 10 UT. Over the course of 5 hr, we observed six faint infrared (IR...
A Gould,HW Rix
A Gould
If supermassive black holes (BHs) are generically present in galaxy centers, and if galaxies are built up through hierarchical merging, BH binaries are at least temporary features of most galactic bulges. Observations suggest, however, that...
C Akerlof,R Balsano,S Barthelmy et al.
C Akerlof et al.
The Robotic Optical Transient Search Experiment (ROTSE) seeks to measure simultaneous and early afterglow optical emission from gamma-ray bursts (GRBs). A search for optical counterparts to six GRBs with localization errors of 1 deg2 or bet...
G Helou,NY Lu,MW Werner et al.
G Helou et al.
The mid-infrared spectra (2.5-5 and 5.7-11.6 µm) obtained by ISOPHOT reveal the interstellar medium emission from galaxies powered by star formation to be strongly dominated by the aromatic features at 6.2, 7.7, 8.6, and 11.3 µm. Addition...
The Variability of Seyfert 1.8 and 1.9 Galaxies at 1.6 Microns [0.03%]
Seyfert 1.8 和 Seyfert 1.9 类星系在1.6微米波段的变异性研究
AC Quillen,S Shaked,A Alonso-Herrero et al.
AC Quillen et al.
We present a study of Seyfert 1.5-2.0 galaxies observed at two epochs with the Hubble Space Telescope (HST) at 1.6 µm. We find that unresolved nuclear emission from nine of 14 nuclei varies at the level of 10%-40% on timescales of 0.7-14 m...
Y Taniguchi,Y Shioya
Y Taniguchi
We propose a new model for the extended Lyalpha blobs found recently at high redshift (z approximately 3). The observational properties of these blobs are as follows: (1) the observed Lyalpha luminosities are approximately 1043 h-2 ergs s-1...