Skip to main content

Research Repository

Advanced Search

THE PROTOPLANETARY DISKS IN THE NEARBY MASSIVE STAR-FORMING REGION CYGNUS OB2

Guarcello, M. G.; Drake, J. J.; Wright, N. J.; Drew, J. E.; Gutermuth, R. A.; Hora, J. L.; Naylor, T.; Aldcroft, T.; Fruscione, A.; García-Alvarez, D.; Kashyap, V. L.; King, R.

Authors

M. G. Guarcello

J. J. Drake

J. E. Drew

R. A. Gutermuth

J. L. Hora

T. Naylor

T. Aldcroft

A. Fruscione

D. García-Alvarez

V. L. Kashyap

R. King



Abstract

The formation of stars in massive clusters is one of the main modes of the star formation process. However, the study of massive star-forming regions is hampered by their typically large distances to the Sun. One exception to this is the massive star-forming region Cygnus OB2 in the Cygnus X region, at the distance of ∼1400 pc. Cygnus OB2 hosts very rich populations of massive and low-mass stars, being the best target in our Galaxy to study the formation of stars, circumstellar disks, and planets in the presence of massive stars. In this paper, we combine a wide and deep set of photometric data, from the r band to 24 μm, in order to select the disk-bearing population of stars in Cygnus OB2 and identify the class I, class II, and stars with transition and pre-transition disks. We selected 1843 sources with infrared excesses in an area of 1° × 1° centered on Cyg OB2 in several evolutionary stages: 8.4% class I, 13.1% flat-spectrum sources, 72.9% class II, 2.3% pre-transition disks, and 3.3% transition disks. The spatial distribution of these sources shows a central cluster surrounded by an annular overdensity and some clumps of recent star formation in the outer region. Several candidate subclusters are identified, both along the overdensity and in the rest of the association.

Citation

Guarcello, M. G., Drake, J. J., Wright, N. J., Drew, J. E., Gutermuth, R. A., Hora, J. L., …King, R. (in press). THE PROTOPLANETARY DISKS IN THE NEARBY MASSIVE STAR-FORMING REGION CYGNUS OB2. Astrophysical Journal, 773(2), 135. https://doi.org/10.1088/0004-637x/773/2/135

Journal Article Type Article
Acceptance Date Jun 23, 2013
Online Publication Date Aug 2, 2013
Deposit Date Jun 16, 2023
Journal The Astrophysical Journal
Print ISSN 0004-637X
Electronic ISSN 1538-4357
Publisher American Astronomical Society
Peer Reviewed Peer Reviewed
Volume 773
Issue 2
Pages 135
DOI https://doi.org/10.1088/0004-637x/773/2/135
Keywords Space and Planetary Science; Astronomy and Astrophysics; infrared: stars; open clusters and associations: individual (Cygnus OB2); protoplanetary disks; stars: formation; stars: pre-main sequence