CRAWFORD, IA;
BARLOW, MJ;
(1991)
On the distance to M1-67.
Astronomy & Astrophysics
, 249
(2)
pp. 518-520.
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Abstract
The interstellar Na I D2 absorption spectrum of 209 BAC, the WN 8 central star of M1 - 67, shows a total velocity extent of 60 km/s. This is consistent with the spread of gas velocities expected from galactic rotation, provided 209 BAC is at a distance of 4-5 kpc, implying that it is a massive population I WN 8 star surrounded by a stellar ejecta nebula. If M1 - 67 was a planetary nebula at a distance of only 0.5-1 kpc, the velocity extent of the Na I absorption line should be 5-6 times smaller than that observed. It is suggested that similar observations should be obtained of We 21, recently discovered by Duerbeck and Reipurth (1990) to be a WN 8 star in a ringlike nebula.
| Type: | Article |
|---|---|
| Title: | On the distance to M1-67 |
| Open access status: | An open access version is available from UCL Discovery |
| Publisher version: | https://ui.adsabs.harvard.edu/abs/1991A%26A...249.... |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Distance; Gas Dynamics; Interstellar Gas; Planetary Nebulae; Wolf-Rayet Stars; Absorption Spectra; Galactic Rotation; Radial Velocity; Stellar Mass Ejection; Astrophysics |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10096208 |
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