Dissecting a site of massive star formation: IRAS 23033+5951

  1. Get@NRC: Dissecting a site of massive star formation: IRAS 23033+5951 (Opens in a new window)
DOIResolve DOI: http://doi.org/10.1017/S174392130700138X
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Proceedings titleTriggered Star Formation in a Turbulent ISM
Series titleProceedings of the International Astronomical Union; Volume 2
ConferenceTriggered Star Formation in a Turbulent ISM, International Astronomical Union. Symposium no. 237, August, 14-18, 2006, Prague, Czech Republic
Pages155159; # of pages: 5
AbstractWe present new BIMA observations of the massive star-forming region IRAS 23033+ 5951 in Cepheus. 3 mm continuum observations reveal that the source decomposes into at least three dusty clumps, each of which has sufficient mass to form a massive star. The most massive clump has a mass of about 225 M⊙ and appears to house the massive protostar which drives the prominent CO outflow seen in the region. Our H¹³3CN 1–0, N₂H⁺ 1–0, and H¹³CO⁺ 1–0 maps show that the three continuum sources are all embedded in an elongated structure whose long axis is perpendicular to the outflow. Both H¹³CO⁺ and H13CN peak at the geometric center of this structure, which lies between the two prominent continuum peaks. All three lines – H¹³CN, H1³CO⁺, and N₂H+–show the same velocity gradient along the long axis of their integrated intensity maps. Although the approximately 90,000 AU length of the elongated structure prohibits a disk interpretation, the fact that the dynamical and gas masses of the structure differ by only a factor of a few suggests that the structure may be partially rotationally supported. We also detect a signature of infall toward the center of the structure, seen as an asymmetrically blue HCO⁺ line where its optically thin isotope, H¹³CO⁺, is symmetric and single-peaked.
Publication date
PublisherCambridge University Press
International Astronomical Union
AffiliationNRC Herzberg Institute of Astrophysics; National Research Council Canada
Peer reviewedYes
NPARC number13053185
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Record identifier5c3fd954-f9d5-491d-9169-72094d729de9
Record created2009-11-25
Record modified2017-06-27
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