Skip to main content

An outbursting protostar of the FU Orionis type in the Cygnus OB7 molecular cloud

Movsessian, Tigran, Khanzadyan, Tigran, Aspin, Colin, Magakian, Tigran Yu., Beck, T., Moiseev, A.V., Smith, Michael D., Nikogossian, Elena H. (2006) An outbursting protostar of the FU Orionis type in the Cygnus OB7 molecular cloud. Astronomy and Astrophysics, 455 (3). pp. 1001-1008. ISSN 0004-6361. (doi:10.1051/0004-6361:20054609) (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) (KAR id:8332)

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.
Official URL:
http://dx.doi.org/10.1051/0004-6361:20054609

Abstract

Context: .To follow the early evolution of stars we need to understand how young stars accrete and eject mass. It is generally assumed that the FU Orionis phenomenon is related to the variations in the disk accretion, but many questions remain still open, in particular because of the rarity of FU Ori type stars.

Aims: .We explore here the characteristics of the outburst and of the environment of one new object, discovered recently in the active star formation region containing RNO 127, within the Cygnus OB7 dark cloud complex.

Methods: .We present an extensive optical and near-infrared study of a new candidate of FU Orionis object, including its direct imaging, spectroscopy and scanning Fabry-Pérot interferometry.

Results: .The source, associated with the variable reflection nebula, underwent prodigious outburst. The "Braid" nebula, which appeared in 2000, as is indicated by its name, consists of two intertwined features, illuminated by the outburst. Subsequent NIR observations revealed the bright source, which was not visible on 2MASS images, and its estimated brightening was more than 4 mag. Optical and infrared spectral data show features, which are necessary for the system to be referred to as a FUor object. The bipolar optical flow directed by the axis of nebula also was found. Various estimates give the November/December 1999 as the most probable date for the eruption.

Item Type: Article
DOI/Identification number: 10.1051/0004-6361:20054609
Subjects: Q Science
Divisions: Divisions > Division of Natural Sciences > Physics and Astronomy
Depositing User: Michael Smith
Date Deposited: 08 Sep 2008 20:37 UTC
Last Modified: 16 Nov 2021 09:46 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/8332 (The current URI for this page, for reference purposes)

University of Kent Author Information

  • Depositors only (login required):

Total unique views for this document in KAR since July 2020. For more details click on the image.