Shocked excitation in the bipolar nebula CRL 618

Details Shocked excitation in the bipolar nebula CRL 618 Shocked excitation in the bipolar nebula CRL 618

Sep 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990ap%26ss.171..231r&link_type=abstract

(IAU, European Regional Astronomy Meeting, 11th, La Laguna, Spain, July 3-8, 1989) Astrophysics and Space Science (ISSN 0004-640

Astronomy and Astrophysics

Astrophysics

6

Planetary Nebulae, Protoplanets, Stellar Evolution, Ionized Gases, Molecular Gases, Stellar Envelopes, Stellar Winds, Very Large Array (Vla)

Scientific paper

Intermediate-long-slit spectroscopy of the protoplanetary-nebula candidate CRL 618, obtained using an IPCS on the 2.5-m telescope at the Observatorio Roque de los Muchachos, are reported. The data are presented in plots of forbidden N II (6548 + 6584 A) vs H-alpha and compared with the predictions of theoretical models. Best agreement is found with the model of Canto (1978 and 1980), in which the outflow from the central B star is supersonic with respect to the surrounding medium and two shock waves develop, one propagating into the stellar wind and one moving into the envelope of the primary. In this scenario the expansion velocities of the molecular and ionized gas are 20 and 80 km/sec, respectively; the mass-loss rate is a few times 10 to the -6th solar mass/yr; the velocity of the fast wind is about 140 km/sec; the shocked-wind density is 100-1000/cu cm; the shocked-gas density in the principal outflow envelope is 1,000-10,000/cu cm; and the shock velocity within the envelope is about 50 km/sec.

Affiliated with

Also associated with

No associations

Rating

Shocked excitation in the bipolar nebula CRL 618 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Shocked excitation in the bipolar nebula CRL 618, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Shocked excitation in the bipolar nebula CRL 618 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1400896