Circumstellar Gas in the Wide Binary HD 188037

Details Circumstellar Gas in the Wide Binary HD 188037 Circumstellar Gas in the Wide Binary HD 188037

Aug 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997apj...485..341j&link_type=abstract

Astrophysical Journal v.485, p.341

Astronomy and Astrophysics

Astronomy

10

Stars: Circumstellar Matter, Stars: Individual Henry Draper Number: Hd 188037, Ism: Molecules, Stars: Late-Type

Scientific paper

We report radio, optical, and ultraviolet studies of the wide binary HD 188037 (=IRC +20439). We detect the CO (2--1) and (1--0) rotational lines from the circumstellar envelope in this system, which consists of a luminous (~7000 L&sun;) mass-losing M-type star and, at a separation of 0."75, a main-sequence A-type star. The strong (2--1) line has a very unusual skewed shape with a width at zero intensity of about 30 km s-1, which we explain with a model wherein the gas ejected by the M-type star is preferentially photodissociated on one side of the outflow by ultraviolet light from the A-type companion. We infer that the wind from the M giant expands at 15 km s-1 and, for an estimated distance of 300 pc, carries ~3 x 10-7 M&sun; yr-1. Our simplified model for CO in a wind being photodissociated by ultraviolet from a companion explains why CO can be detected around Mira yet not around alpha Sco.

Affiliated with

Also associated with

No associations

Rating

Circumstellar Gas in the Wide Binary HD 188037 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 Circumstellar Gas in the Wide Binary HD 188037, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Circumstellar Gas in the Wide Binary HD 188037 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1878161