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| DOI | 10.1088/0004-637X/812/2/134 | ||||
| Año | 2015 | ||||
| Tipo | artículo de investigación |
Citas Totales
Autores Afiliación Chile
Instituciones Chile
% Participación
Internacional
Autores
Afiliación Extranjera
Instituciones
Extranjeras
We have obtained ALMA Band 7 observations of the FU Ori outburst system at a 0 ''.6 x 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 x 10(-4) M-circle dot and 8 x 10(-5) M-circle dot 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 (CO)-C-12(3-2), HCO+(4-3), and from HCN(4-3). The (CO)-C-12 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.
| Ord. | Autor | Género | Institución - País |
|---|---|---|---|
| 1 | HALES-GEBRIM, ANTONIO SALVADOR | Hombre |
Atacama Large Millimeter Array - Chile
Natl Radio Astron Observ - Estados Unidos Atacama Large Millimeter-submillimeter Array - Chile National Radio Astronomy Observatory - Estados Unidos |
| 2 | Corder, S. A. | - |
Atacama Large Millimeter Array - Chile
Natl Radio Astron Observ - Estados Unidos |
| 3 | Dent, William R. F. | Hombre |
Atacama Large Millimeter Array - Chile
ESO - Alemania Atacama Large Millimeter-submillimeter Array - Chile Observatorio Europeo Austral - Alemania |
| 4 | Andrews, Sean | Hombre |
Harvard Smithsonian Ctr Astrophys - Estados Unidos
Harvard-Smithsonian Center for Astrophysics - Estados Unidos |
| 5 | Eisner, Josh | Hombre |
UNIV ARIZONA - Estados Unidos
The University of Arizona - Estados Unidos |
| 6 | CIEZA-GONZALEZ, LUCAS ALEJO | Hombre |
Universidad Diego Portales - Chile
Nucleo Milenio Discos Protoplanetarios - Chile Millenium Nucleus - Chile |
| Fuente |
|---|
| National Science Foundation |
| Conicyt-Fondecyt |
| ALMA-CONICYT |
| Millennium Science Initiative (Chilean Ministry of Economy) |
| NSF AAG |
| Agradecimiento |
|---|
| This paper makes use of the following ALMA data: ADS/JAO.ALMA#2011.0.00548.S. ALMA is a partnership of ESO (representing its member states), NSF (USA), and NINS (Japan), together with NRC (Canada) and NSC and ASIAA (Taiwan), in cooperation with the Republic of Chile. The Joint ALMA Observatory is operated by ESO, AUI/NRAO, and NAOJ. The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc. This research made use of Astropy, a community-developed core Python package for Astronomy (Astropy Collaboration et al. 2013). J.A.E. acknowledges support from NSF AAG grant 1311910. L.A.C. was supported by ALMA-CONICYT grant number 31120009 and CONICYT-FONDECYT grant number 1140109. L.A.C. also acknowledges support from the Millennium Science Initiative (Chilean Ministry of Economy), through grant "Nucleus RC130007." |