ar X iv : a st ro - p h / 01 05 05 8 v 1 3 M ay 2 00 1 Ionization and Velocity Structure in the Supernova Remnant E 0102 - 72
نویسندگان
چکیده
The High Energy Transmission Grating (HETG) Spectrometer aboard the Chandra X-Ray Observatory was used to observe E0102-72, a ∼1000 year old, oxygen rich supernova in the Small Magellanic Cloud. The HETG disperses the image of the remnant into a spectrum of images in the light of individual X-ray emission lines. Doppler shifts in the strongest lines of oxygen and neon reveal bulk motions of up to 2000 km/sec with a complex morphology. Comparison of progressive ionization stages of magnesium, neon, oxygen and silicon provide new insights into the mechanism of the 'reverse shock' that heats the stellar ejecta.
منابع مشابه
ar X iv : a st ro - p h / 01 05 04 0 v 2 3 M ay 2 00 1 Ionization Structure and the Reverse Shock in E 0102 - 72
The young oxygen-rich supernova remnant E0102-72 in the Small Magel-lanic Cloud has been observed with the High Energy Transmission Grating Spectrometer of Chandra. The high resolution X-ray spectrum reveals images of the remnant in the light of individual emission lines of oxygen, neon, magnesium and silicon. The peak emission region for hydrogen-like ions lies at larger radial distance from t...
متن کاملar X iv : a st ro - p h / 01 05 04 0 v 1 2 M ay 2 00 1 Ionization Structure and the Reverse Shock in E 0102 - 72
The young oxygen-rich supernova remnant E0102-72 in the Small Magel-lanic Cloud has been observed with the High Energy Transmission Grating Spectrometer of Chandra. The high resolution X-ray spectrum reveals images of the remnant in the light of individual emission lines of oxygen, neon, magnesium and silicon. The peak emission region for hydrogen-like ions lies at larger radial distance from t...
متن کاملar X iv : a st ro - p h / 02 05 42 8 v 1 2 4 M ay 2 00 2 A LATE - TIME TRANSITION IN THE EQUATION OF STATE VERSUS Λ CDM
We study a model of the dark energy which exhibits a rapid change in its equation of state w(z), such as occurs in vacuum metamorphosis. We compare the model predictions with CMB, large scale structure and supernova data and show that a late-time transition is marginally preferred over standard ΛCDM.
متن کاملar X iv : a st ro - p h / 05 05 55 5 v 1 2 7 M ay 2 00 5 Pulsars as Tools for Fundamental Physics & Astrophysics
X iv :a st ro -p h/ 05 05 55 5v 1 2 7 M ay 2 00 5 Pulsars as Tools for Fundamental Physics & Astrophysics J. M. Cordes, M. Kramer, T. J. W. Lazio , B. W. Stappers, D. C. Backer, S. Johnston Department of Astronomy and NAIC, Cornell University, Ithaca, NY USA University of Manchester, Jodrell Bank Observatory, Jodrell Bank, UK Naval Research Laboratory, Remote Sensing Division, Washington, DC US...
متن کاملar X iv : a st ro - p h / 01 05 53 8 v 1 3 0 M ay 2 00 1 Circumnuclear stellar population , morphology and environment of Seyfert 2 galaxies : an evolutionary scenario
We investigate the relation between the characteristics of the circumnuclear stellar population and both the galaxy morphology and the presence of close companions for a sample of 35 Seyfert 2 nuclei. Fifteen galaxies present unambiguous signatures of recent episodes of star formation within ≈300 pc from the Jansky Fellow Gemini Fellow
متن کامل