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Record 10 of 174
Spectropolarimetry of the post-main-sequence bipolar nebulae GL 618, M2-56, and M1-92
External Online Source: doi:10.1086/172128
Author and Affiliation:
Trammell, Susan R.(NASA Ames Research Center, Moffett Field, CA, United States)
Dinerstein, Harriet L.(Texas Univ., Austin, United States)
Goodrich, Robert W.(California Inst. of Technology, Pasadena, United States)
Abstract: New high-quality spectropolarimetry of the post-main-sequence bipolar nebulae GL 618, M2-56, and M1-92 is presented which permits accurate separation of the scattered and unscattered components. Shock emission dominates the optical line spectrum of the three nebulae and probably plays a significant role in their dynamical evolution. The central H II region spectrum for GL 6189 is isolated and T(stellar) of 36,000-40,000 and log (N/O) = 0.0 +/- 0.2 are derived. GL 618 and M2-56 have shock velocities of 40-60 km/s; that of M1-92 is 60-100 km/s. Log (N/O) is derived for different regions of the three nebulae. There is an apparent correlation of outflow velocity with chemical abundance.
Publication Date: Jan 01, 1993
Document ID:
19930037549
(Acquired Dec 28, 1995)
Accession Number: 93A21546
Subject Category: ASTROPHYSICS
Document Type: Journal Article
Publication Information: Astrophysical Journal, Part 1; p. p. 249-263.; (ISSN 0004-637X); 402; 1
Publisher Information: United States
Contract/Grant/Task Num: NSF AST-91-15101; NSF AST-90-23265; NSF AST-91-21889; NAG2-372
Financial Sponsor: NASA; United States
Organization Source: NASA Ames Research Center; Moffett Field, CA, United States
Description: 15p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: ASTRONOMICAL POLARIMETRY; ASYMPTOTIC GIANT BRANCH STARS; PLANETARY NEBULAE; VISIBLE SPECTRUM; BIPOLARITY; LINE SPECTRA; SPACE DENSITY; STELLAR EVOLUTION
Imprint And Other Notes: Astrophysical Journal, Part 1 vol. 402, no. 1 p. 249-263. Jan. 1, 1993
Availability Source: Other Sources
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