| Autor: |
Nicole Karnath, Adam E. Rubinstein, Samuel Federman, Alice C. Quillen, Joel D. Green, Edward T. Chambers, Dan M. Watson, S. Thomas Megeath, Simon Coudé, Matthias Justen, Mayank Narang, Steve Goldman, John J. Tobin |
| Jazyk: |
angličtina |
| Rok vydání: |
2024 |
| Předmět: |
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| Zdroj: |
The Astrophysical Journal, Vol 974, Iss 1, p 65 (2024) |
| Druh dokumentu: |
article |
| ISSN: |
1538-4357 |
| DOI: |
10.3847/1538-4357/ad67dd |
| Popis: |
We present a combined Stratospheric Observatory for Infrared Astronomy (SOFIA) and two-epoch Hubble Space Telescope (HST) study of the region NGC 2071 IR containing the outflow from the protostar HOPS 361-A (NGC 2071 IRS 1). New [O i ] 63 μ m spectra, taken with the German REciever for Astronomy at Terahertz frequencies (GREAT) instrument aboard SOFIA, trace the outflow, spectrally resolve line profiles, and give radial velocities of the far-IR emission to yield 3D kinematics, shock properties, and feedback properties. Proper motions and extinction values from HST give a more complete quasi-3D picture that we use to model shock speeds and densities. We identify 14 distinct features that show proper motions. Combined with the GREAT data, we estimate that HOPS 361-A has a mass outflow rate of 3.16 × 10 ^−6 M _⊙ yr ^−1 with shock speeds up to 51 km s ^−1 . The outflow force summed over all knots per area is measured to be 1.45 × 10 ^−4 M _⊙ km ^−1 s ^−1 yr ^−1 and a power summed over all knotsper area of 2.37 × 10 ^−2 M _⊙ s ^−3 dissipated assuming constant $\dot{M}$ , with large uncertainties on the feedback values. The total [O i ] luminosity using all SOFIA apertures encompassing the HOPS 361 clump is 0.7 L _⊙ , corresponding to a mass outflow rate of 7 × 10 ^−5 M _⊙ yr ^−1 . This is the second 3D kinematic study of an outflow in NGC 2071 IR in the near- and far-IR regimes following Rubinstein et al. ( 2023 ). The SOFIA [O i ] spectra add unique focus to the entrained gas connecting the recent episode of outflows from HOPS 361-A to the outflow cavity and the surrounding NGC 2071 IR star-forming environment. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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