The Proto-Planetary Nebula Vy 2-2
نویسندگان
چکیده
منابع مشابه
The Shaping of the Red Rectangle Proto-planetary Nebula
I argue that the slowly expanding biconical structure of the Red Rectangle−a nebula around the post asymptotic giant branch binary stellar system HD 44179−can be formed by intermittent jets blown by the accreting companion. The bright biconical structure of the Red Rectangle nebula can be understood to be composed of a multiple double-ring system. In the proposed shaping process, one among seve...
متن کاملHigh resolution millimeter imaging of the proto-planetary nebula
We report high resolution (1′′–2′′) imaging of the CO 2–1 line and the millimeter continuum in the proto-planetary nebula He 3-1475. The observations reveal the presence of a massive (∼ 0.6 M⊙) envelope of molecular gas around the origin of the remarkable bipolar jet system seen in optical images with the HST. The CO kinematics are well modeled by an expanding, bi-conical envelope: the prominen...
متن کامل0 the “ Twin Jet ” Planetary Nebula M 2 – 9
We present a model for the structure, temporal behavior, and evolutionary status of the bipolar nebula M2−9. According to this model the system consists of an AGB or post-AGB star and a hot white dwarf companion, with an orbital period of about 120 years. The white dwarf has undergone a symbiotic nova eruption about 1200 years ago, followed by a supersoft x-ray source phase. The positional shif...
متن کاملNew insights on the complex planetary nebula Hen 2 - 113 ⋆
We report infrared observations of the planetary nebula Hen 2-113 obtained with VLT/NACO, VLTI/MIDI, VLT/ISAAC and TIMMI at the ESO 3.6m. Hen 2-113 exhibits a clear ring-like structure superimposed to a more diffuse environment visible in the L' (3.8µm), M' (4.78µm) and 8.7µm bands. No clear core at 8.7µm and no fringes through the N band could be detected for this object with MIDI. A qualitati...
متن کاملOptical spectrum of the planetary nebula M 2 - 24
We have obtained medium-resolution, deep optical long-slit spectra of the bulge planetary nebula (PN) M 2-24. The spectrum covers the wavelength range from 3610–7330Å. Over two hundred emission lines have been detected. The spectra show a variety of optical recombination lines (ORLs) from C, N, O and Ne ions. The diagnostic diagram shows significant density and temperature variations across the...
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: Symposium - International Astronomical Union
سال: 1989
ISSN: 0074-1809
DOI: 10.1017/s0074180900138835