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| EPoS Contribution |
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VLT/NACO detection of a proplyd candidate in Trumpler 14
Silvia M.H. Vicente ESA/ESTEC, Noordwijk, Netherlands | |
| Externally illuminated protoplanetary disks or "proplyds" are a special class of low-mass young stellar objects (YSOs) found embedded within or near a HII region. They are usually identified as comet-shaped photoionized envelopes with bright ionization fronts facing the source of external UV radiation and extended tails pointing away from it which are most visible in hydrogen recombination lines, in the optical and near-IR, and other optical ionized species like [OIII], [SII] and [NII]. In this work, we report the discovery and present the results of a first analysis of the observed morphology of an extended globule that might be a photoevaporating protoplanetary disk/microjet system similar to the bright proplyds found in the Orion Nebula Cluster (ONC). The proplyd candidate was discovered in the course of a VLT/NACO JHKsL' survey of the core of Trumpler 14, a young cluster in the Carina Nebula (NGC 3372). Archival HST/ACS images in the optical, together with the adaptive optics near-IR images and existing photoevaporating theories, were used to discuss the possible scenarios for the nature, origin and expected lifetime of this object that can be confirmed or rejected by future high-resolution multi-wavelength observations. | |
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| Caption: VLT/NACO near-IR images in HKsL' and 4.05 micron (upper row) and HST/ACS/HRC optical images (bottom row) in [OIII], V-band, Halpha and Z-band of the proplyd candidate in the core of Trumpler 14. A spike emerging from the globule's head and a 2-tail morphology in the L'-band image are suggestive of the presence of a microjet. Tail1 is shorter and brighter with a head-to-tail extent of 0.5" (1400 AU for the adopted distance of 2.8 kpc to Trumpler 14), and tail2 is longer (1.1" or 3080 AU), fainter, and nearly parallel to the former. Their length and direction are indicated by the black arrows in the L'-band image. Each mosaic is 2.5" x 2.5" for NACO and 2.3" x 2.3" for HST, with north up and east to the left. | |
| Collaborators: J. Alves, CAHA, Spain I. Matsuyama, U of California Berkeley, USA J. Ascenso, CfA, USA H. Bouy, ESA/ESAC, Spain T. Prusti, ESA/ESTEC, Netherlands B. Merin, ESA/ESAC, Spain |
Suggested Session:
Early Phases of Disks |