The early alma view of the fu ori outburst system

A. S. Hales, S. A. Corder, W. R D Dent, S. M. Andrews, Joshua A Eisner, L. A. Cieza

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

We have obtained ALMA Band 7 observations of the FU Ori outburst system at a 0.″6 × 0.″5 resolution to measure the link between the inner disk instability and the outer disk through submillimeter continuum and molecular line observations. Our observations detect continuum emission that can be well-modeled by two unresolved sources located at the position of each binary component. The interferometric observations recover the entire flux reported in previous single-dish studies, ruling out the presence of a large envelope. Assuming that the dust is optically thin, we derive disk dust masses of 2 × 10-4 M and M for the north and south components, respectively. We place limits on the disks' radii of r <45 AU. We report the detection of molecular emission from 12CO(3-2), HCO+(4-3), and from HCN(4-3). The 12CO appears widespread across the two binary components and is slightly more extended than the continuum emission. The denser gas tracer HCO+ peaks close to the position of the southern binary component, while HCN appears to be peaked at the position of the northern component. This suggests that the southern binary component is embedded in denser molecular material, consistent with previous studies that indicate a heavily reddened object. At this angular resolution, any interaction between the two unresolved disk components cannot be disentangled. Higher-resolution images are vital for understanding the process of star formation via rapid accretion FU Ori-type episodes.

Original languageEnglish (US)
Article number134
JournalAstrophysical Journal
Volume812
Issue number2
DOIs
StatePublished - Oct 20 2015

Fingerprint

outburst
dust
image resolution
continuums
tracer
accretion
parabolic reflectors
gas
angular resolution
tracers
star formation
envelopes
radii
high resolution
gases
interactions
detection
ruling
material

Keywords

  • accretion, accretion disks
  • stars: formation

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Hales, A. S., Corder, S. A., Dent, W. R. D., Andrews, S. M., Eisner, J. A., & Cieza, L. A. (2015). The early alma view of the fu ori outburst system. Astrophysical Journal, 812(2), [134]. https://doi.org/10.1088/0004-637X/812/2/134

The early alma view of the fu ori outburst system. / Hales, A. S.; Corder, S. A.; Dent, W. R D; Andrews, S. M.; Eisner, Joshua A; Cieza, L. A.

In: Astrophysical Journal, Vol. 812, No. 2, 134, 20.10.2015.

Research output: Contribution to journalArticle

Hales, AS, Corder, SA, Dent, WRD, Andrews, SM, Eisner, JA & Cieza, LA 2015, 'The early alma view of the fu ori outburst system', Astrophysical Journal, vol. 812, no. 2, 134. https://doi.org/10.1088/0004-637X/812/2/134
Hales, A. S. ; Corder, S. A. ; Dent, W. R D ; Andrews, S. M. ; Eisner, Joshua A ; Cieza, L. A. / The early alma view of the fu ori outburst system. In: Astrophysical Journal. 2015 ; Vol. 812, No. 2.
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