The Nebula Surrounding the B[e] Supergiant R4
نویسندگان
چکیده
منابع مشابه
The blue supergiant Sher 25 and its intriguing hourglass nebula
The blue supergiant Sher 25 is surrounded by an asymmetric, hourglass-shaped circumstellar nebula. Its structure and dynamics have been studied previously through high-resolution imaging and spectroscopy, and it appears dynamically similar to the ring structure around SN1987A. Here we present long-slit spectroscopy of the circumstellar nebula around Sher 25, and of the background nebula of the ...
متن کاملR4 and Its Circumstellar Nebula: Evidence for a Binary Merger?
We present new, NTT longslit spectroscopy of the B[e] supergiant in the binary system R4 in the Small Magellanic Cloud. The data show extended, forbidden N and S emissions which are typical signatures of circumstellar matter. Their extension along the space axis of the slit defines an angular size of 8.6 ′′ which translates into a linear size of 2.4 pc. The N emission lines also show the veloci...
متن کاملShocked gas layers surrounding the WR nebula NGC 2359
NGC 2359 is a Wolf-Rayet (W-R) nebula partially bound by a rather dense and warm molecular cloud. We present the results derived from CO and 13 CO fully sampled maps of the molecular material with angular resolutions up to 12 ′′. We have detected three different velocity components, and determined their spatial distribution and physical properties. The kinematics, morphology, mass and density a...
متن کاملOn the origin and excitation of the extended nebula surrounding NGC 1275
We use line-of-sight velocity information on the filamentary emission-line nebula of NGC 1275 to infer a dynamical model of the nebula’s flow through the surrounding intracluster gas. We detect outflowing gas and flow patterns that match simulations of buoyantly rising bubbles from which we deduce that some of the nebula filaments have been drawn out of NGC 1275. We find a radial gradient of th...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: International Astronomical Union Colloquium
سال: 2000
ISSN: 0252-9211
DOI: 10.1017/s025292110005569x