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The X-Ray Sun in Time: A Study of the Long-Term Evolution of Coronae of Solar-Type Stars
We have used the ASCA and ROSAT X-ray satellites to probe the coronae of a sample of nine solar-like G stars. These stars are all ostensibly single with ages ranging from 70 Myr to 9 Gyr and have
Coronal Evolution of the Sun in Time: High-Resolution X-Ray Spectroscopy of Solar Analogs with Different Ages
We investigate the long-term evolution of X-ray coronae of solar analogs based on high-resolution X-ray spectroscopy and photometry with XMM-Newton. Six nearby main-sequence G stars with ages between
A high-sensitivity survey of radio continuum emission from Herbig Ae/Be stars
We present results of a high-sensitivity VLA/Australia Telescope survey of radio continuum emission from the 57 Herbig Ae/Be stars and candidates in the 1984 catalog of Finkenzeller and Mundt. Twelve
The XMM-Newton extended survey of the Taurus molecular cloud (XEST)
(abridged:) The XMM-Newton Extended Survey of the Taurus Molecular Cloud (XEST) surveys the most populated ~5 square degrees of the Taurus star formation region, using the XMM-Newton X-ray
We report on the properties of pre-main-sequence objects in the Taurus molecular clouds as observed in seven mid- and far-infrared bands with the Spitzer Space Telescope. There are 215 previously
Flares from small to large: X-ray spectroscopy of Proxima Centauri with XMM-Newton
We report results from a comprehensive study of the nearby M dwarf Proxima Centauri with the XMM-Newton satellite, using simultaneously its X-ray detectors and the Optical Monitor with its U band
Discovery of a bipolar X-ray jet from the T Tauri star DG Tauri
Aims. We have obtained and analyzed Chandra ACIS-S observations of the strongly accreting classical T Tauri star DG Tau. Our principal goals are to map the immediate environment of the star to
Million-Degree Plasma Pervading the Extended Orion Nebula
X-ray observations obtained with the X-ray Multi-Mirror satellite XMM-Newton reveal that a hot plasma with a temperature of 1.7 to 2.1 million kelvin pervades the southwest extension of the nebula, suggesting that this x-ray outflow phenomenon must be widespread throughout the authors' Galaxy.
Simultaneous chandra and vla observations of young stars and protostars in rho ophiuchus cloud core a
A 96 ks Chandra X-ray observation of ρ Ophiuchus cloud core A detected 87 sources, of which 60 were identified with counterparts at other wavelengths. The X-ray detections include 12 of 14 known
X-rays from T Tauri: a test case for accreting T Tauri stars
Context. The generation of X-rays in accreting T Tauri stars (TTS) is thought to be predominantly due to energy dissipation in magnetic elds, but alternative X-ray generation mechanisms have been