Chandra observations of SNR 1987A
نویسندگان
چکیده
منابع مشابه
Chandra Observations of Shock Kinematics in Supernova Remnant 1987a
We report the first results from deep X-ray observations of the supernova remnant SNR 1987A with the Chandra LETG. Temperatures inferred from line ratios range from ∼0.1 to 2 keV and increase with ionization potential. Expansion velocities inferred from X-ray line profiles range from ∼300 to 1700 km s , much less than the velocities inferred from the radial expansion of the radio and X-ray imag...
متن کاملEvolution of the Chandra CCD Spectra of SNR 1987A : Probing the Reflected-Shock Picture
We continue to explore the validity of the reflected shock structure (RSS) picture in SNR 1987A that was proposed in our previous analyses of the X-ray emission from this object. We used an improved version of our RSS model in a global analysis of 14 CCD spectra from the monitoring program with Chandra. In the framework of the RSS picture, we are able to match both the expansion velocity curve ...
متن کاملThe Reverse Shock of SNR 1987A
The reverse shock of supernova remnant (SNR) 1987A emits in Hα and Lyα , and comes in two flavors: surface and interior. The former is due to direct, impact excitation of hydrogen atoms crossing the shock, while the latter is the result of charge transfer reactions between these atoms and slower, post-shock ions. Interior and surface emission are analogous to the broadand narrow-line components...
متن کاملDust-Gas Interaction in SNR 1987A
Multiwavelength observations of SNR 1987A show that its morphology is rapidly changing at X-ray, radio, and optical wavelengths as the blast wave from the explosion expands into the circumstellar equatorial ring. Infrared emission arises from the interaction of dust grains with the hot X-ray emitting gas. We show that the IR emission provides important complementary information on the interacti...
متن کاملChandra Observations of Sn 1987a: the Soft X-ray Light Curve Revisited
We report on the present stage of SN 1987A as observed by the Chandra X-ray Observatory. We reanalyze published Chandra observations and add three more epochs of Chandra data to get a consistent picture of the evolution of the X-ray fluxes in several energy bands. We discuss the implications of several calibration issues for Chandra data. Using the most recent Chandra calibration files, we find...
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ژورنال
عنوان ژورنال: Advances in Space Research
سال: 2004
ISSN: 0273-1177
DOI: 10.1016/j.asr.2003.08.017