The star-forming region around HH 24-26 - a revised morphology

Gibb, A.G. and Heaton, B.D. (1993) The star-forming region around HH 24-26 - a revised morphology. Astronomy and Astrophysics, 276 (2). pp. 511-521. ISSN 0004-6361. (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

The full text of this publication is not available from this repository. (Contact us about this Publication)


High resolution observations of the star-forming region around the Herbig - Haro objects 24-26 have been made in J=4-3 HCO+, J=5-4 CS and J=2-1 CO (resolutions 14'', 20'' and 22'' respectively). The former show that the gas appears to be clumped into small (0.05 pc), dense condensations probably of several solar masses, some of which may be associated with known infrared sources. These clumps are embedded in a previously mapped molecular ridge. The HCO+ and CS lines show significant wings in places highlighting the interaction between outflows and the surrounding dense gas. Also resolved are two separate, roughly parallel bipolar outflows, with projected maximum velocities of 8 and 18 km s-1 for the north and south outflows respectively. The mass of material in each outflow is calculated (in the optically thin limit) to be rather similar at about 0.5M., somewhat smaller than previous estimates. Optical depth effects may explain this. A third CO flow may also be present, roughly centred on HH 25 and probably associated with the largest HCO+ clump. None of the remaining clumps are situated near the centres of the main outflows and it seems unlikely that these are powered by any previously known infrared object.

Item Type: Article
Uncontrolled keywords: Interstellar Medium, Clouds, Hh-24-26; Interstellar Medium, Molecules-Stars, Formation Of-Herbig-Haro Objects
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Q Science > QB Astronomy
Divisions: Faculties > Science Technology and Medical Studies > School of Engineering and Digital Arts
Depositing User: M. Nasiriavanaki
Date Deposited: 02 Aug 2009 19:17
Last Modified: 29 Jul 2011 04:02
Resource URI: (The current URI for this page, for reference purposes)
  • Depositors only (login required):