EDP Sciences
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Volume 412, Number 1, December II 2003
Page(s) 147 - 156
Section Formation, structure and evolution of stars
DOI http://dx.doi.org/10.1051/0004-6361:20031429

A&A 412, 147-156 (2003)
DOI: 10.1051/0004-6361:20031429

An optical and near-infrared exploration of the star formation region in Cygnus surrounding RNO 127

T. Movsessian1, 2, T. Khanzadyan3, 1, T. Magakian1, 2, M. D. Smith4 and E. Nikogosian1, 2

1  Byurakan Astrophysical Observatory, 378433 Aragatsotn reg., Armenia
    e-mail: tigmov@bao.sci.am
2  Isaac Newton Institute of Chile, Armenian Branch
    e-mail: tigmag@sci.am
3  Max-Planck Institut für Astronomie, Königstuhl 17, 69117 Heidelberg, Germany
    e-mail: khtig@mpia-hd.mpg.de
4  Armagh Observatory, College Hill, Armagh BT61 9DG, Northern Ireland, UK
    e-mail: mds@star.arm.ac.uk

(Received 8 April 2003 / Accepted 22 August 2003 )

We investigate a relatively unstudied star formation region in Cygnus centered on RNO 127, finding numerous Herbig-Haro flows, many identified in optical [SII], H $\alpha$, and near-infrared H 2 tracers of shock waves. Several protostars and young stars are thus located, including one conspicuously brightened object, which illuminates a variable reflection nebula. In total, the coordinates of 17 optical HH knots and jets, 4 associated cometary nebulae and 3 NIR objects are given. Individual structures are discussed including a central complex which has the characteristics of superposed HH flows. This star-forming cloud is not isolated but is part of a much larger region of distributed star formation, including HH 380 and HH 381.

Key words: stars: formation -- ISM: jets and outflows -- ISM: clouds

Offprint request: T. Khanzadyan, khtig@mpia-hd.mpg.de

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© ESO 2003