Protostars and Planets VI, Heidelberg, July 15-20, 2013

Poster 1K042

Jets and Outflows from Young Stellar Objects in the Carina Nebula Observed in [Fe II] 1.64 um

Shinn, Jong-Ho (Korea Astronomy and Space Science Institute)
Pyo, Tae-Soo (National Astronomical Observatory of Japan)
Lee, Jae-Joon (Korea Astronomy and Space Science Institute)
Lee, Ho-Gyu (University of Tokyo)
Kim, Hyun-Jeong (Seoul National University)
Koo, Bon-Chul (Seoul National University)
Sung, Hwankyung (Sejong University)
Chun, Moo Young (Korea Astronomy and Space Science Institute)
Lyo, A.-Ran (Korea Astronomy and Space Science Institute)
Moon, Dae-Sik (University of Toronto)
Kyeong, Jaemann (Korea Astronomy and Space Science Institute)
Park, Byeong-Gon (Korea Astronomy and Space Science Institute)
Hur, Hyeonoh (Sejong University)
Lee, Yong-Hyun (Seoul National University)

We present [Fe II] 1.64 um imaging observations for jets and outflows from young stellar objects (YSOs) over the northern part (~24′x45′) of the Carina Nebula, a massive star forming region. The observations were performed with IRIS2 of Anglo-Autralian Telescope and the seeing was ~1.5\". Several jets and outflows features are detected at eight different regions, and named as forbidden emission line regions (FELRs). One new candidate for Herbig-Haro Object is identified comparing our [Fe II] images to H_alpha images of Hubble Space Telescope. FELRs have knotty or longish shapes, and distribute around the triangular area formed by three star clusters Tr 14, Tr 15, and Tr 16, which contain many massive stars. The detection rate of FELRs against previously identified YSOs is 1.4 %. We estimate the outflow rate from the [Fe II] flux based on some assumptions. The jet-driving objects are identified for three FELRs (FELR-2, -4, and -7), for which we study the relations between the outflow rate and the YSO physical parameters from the radiative transfer model fitting. The ratios of the outflow rate over the disk accretion rate are consistent for FELR-4 and -7 with the previously reported values, while it is higher for FELR-2. The masses of jet-driving objects are low or intermediate, and they are not likely to become massive stars (> 8 Ms). Other YSO physical parameters, such as luminosity and age, show reasonable relations or trends.

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