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Population and dynamical state of the eta Chamaeleontis sparse young open cluster
A-Ran Lyo, Warrick A. Lawson, Eric D. Feigelson +1
We report new results in our continuing study of the unique compact (1 pc extent), nearby (d = 97 pc), young (t = 9 Myr) stellar cluster dominated by the B9 star eta Chamaeleontis.…
Rotational modulation of the photospheric and chromospheric activity in the young, single K2-dwarf PW And
J. Lopez-Santiago, D. Montes, M. J. Fernandez-Figueroa +1
High resolution echelle spectra of PW And (HD~1405) have been taken during eight observing runs from 1999 to 2002. The detailed analysis of the spectra allow us to determine its sp…
A New Method to Map Flares in Quasars
Atsunori Yonehara, Shin Mineshige, Yoh Takei +2
Recently, Chartas et al. (2001) detected a rapid X-ray flare in the gravitationally lensed, multiple image quasar RX J0911.4+0551. Dramatic events, such as rapid X-ray flares, are…
Sensitive observations at 1.4 and 250 GHz of z > 5 QSOs
A. O. Petric, C. L. Carilli, F. Bertoldi +5
We present 1.4 and 5 GHz observations taken with the Very Large Array (VLA), and observations at 250 GHz obtained with the Max-Planck millimeter bolometer (MAMBO) at the IRAM 30~m…
A First Look at White Dwarf - M Dwarf Pairs in the Sloan Digital Sky Survey (SDSS)
Sean N. Raymond, Paula Szkody, Suzanne L. Hawley +7
We have identified 109 White Dwarf (WD) - M dwarf pairs in the Sloan Digital Sky Survey (SDSS) with g < 20th magnitude. For each system we determined the temperature of the WD prim…
Chandra Observations of Nuclear X-ray Emission from a Sample of Radio Sources
J. K. Gambill, R. M. Sambruna, G. Chartas +5
We present the X-ray properties of a sample of 17 radio sources observed with the Chandra X-ray Observatory as part of a project aimed at studying the X-ray emission from their rad…