O-like Stars in the Direction of the North America and Pelican Nebulae
| dc.creator | Straizys, V. | |
| dc.creator | Laugalys, V. | |
| dc.date | 2008-09-18 | |
| dc.date.accessioned | 2026-07-07T10:03:47Z | |
| dc.date.available | 2026-07-07T10:03:47Z | |
| dc.description | In the area covering the complex of the North America and Pelican nebulae we identified 13 faint stars with J-H and H-Ks color indices which simulate heavily reddened O-type stars. One of these stars is CP05-4 classified as O5 V by Comeron and Pasquali (2005). Combining magnitudes of these stars in the passbands I, J, H, Ks and [8.3] we were able to suspect that two of them are carbon stars and five are late M-type AGB stars. Interstellar extinction in the direction of these stars was estimated from the background red clump giants in the J-H vs. H-Ks diagram and from star counts in the Ks passband. Four or five stars are found to have a considerable probability of being O-type stars, contributing to the ionization of North America and Pelican. If they really are O-type stars, their interstellar extinction A(V) should be from 16 to 35 mag. Two of them seem to be responsible for bright E and J radio rims discovered by Matthews and Goss (1980). | |
| dc.description | 17 pages, 6 figures | |
| dc.identifier | https://arxiv.org/abs/0809.3229 | |
| dc.identifier | http://arxiv.org/abs/0809.3229 | |
| dc.identifier | Baltic Astronomy, vol. 17, 143-159, 2008 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/169423 | |
| dc.subject | Astrophysics | |
| dc.title | O-like Stars in the Direction of the North America and Pelican Nebulae | |
| dc.type | text |