The Astrophysical Journal Letters (Jan 2024)
Discovery of a Collimated Jet from the Low-luminosity Protostar IRAS 16253−2429 in a Quiescent Accretion Phase with the JWST
- Mayank Narang,
- P. Manoj,
- Himanshu Tyagi,
- Dan M. Watson,
- S. Thomas Megeath,
- Samuel Federman,
- Adam E. Rubinstein,
- Robert Gutermuth,
- Alessio Caratti o Garatti,
- Henrik Beuther,
- Tyler L. Bourke,
- Ewine F. Van Dishoeck,
- Neal J. Evans II,
- Guillem Anglada,
- Mayra Osorio,
- Thomas Stanke,
- James Muzerolle,
- Leslie W. Looney,
- Yao-Lun Yang,
- Pamela Klaassen,
- Nicole Karnath,
- Prabhani Atnagulov,
- Nashanty Brunken,
- William J. Fischer,
- Elise Furlan,
- Joel Green,
- Nolan Habel,
- Lee Hartmann,
- Hendrik Linz,
- Pooneh Nazari,
- Riwaj Pokhrel,
- Rohan Rahatgaonkar,
- Will R. M. Rocha,
- Patrick Sheehan,
- Katerina Slavicinska,
- Amelia M. Stutz,
- John J. Tobin,
- Lukasz Tychoniec,
- Scott Wolk
Affiliations
- Mayank Narang
- ORCiD
- Academia Sinica Institute of Astronomy & Astrophysics , 11F of Astro-Math Bldg., No.1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan; Department of Astronomy and Astrophysics Tata Institute of Fundamental Research Homi Bhabha Road , Colaba, Mumbai 400005, India
- P. Manoj
- ORCiD
- Department of Astronomy and Astrophysics Tata Institute of Fundamental Research Homi Bhabha Road , Colaba, Mumbai 400005, India
- Himanshu Tyagi
- ORCiD
- Department of Astronomy and Astrophysics Tata Institute of Fundamental Research Homi Bhabha Road , Colaba, Mumbai 400005, India
- Dan M. Watson
- ORCiD
- University of Rochester , Rochester, NY, USA
- S. Thomas Megeath
- ORCiD
- University of Toledo , Toledo, OH, USA
- Samuel Federman
- ORCiD
- University of Toledo , Toledo, OH, USA
- Adam E. Rubinstein
- ORCiD
- University of Rochester , Rochester, NY, USA
- Robert Gutermuth
- ORCiD
- University of Massachusetts Amherst , Amherst, MA, USA
- Alessio Caratti o Garatti
- ORCiD
- INAF-Osservatorio Astronomico di Capodimonte , IT, Italy
- Henrik Beuther
- ORCiD
- Max Planck Institute for Astronomy , Heidelberg, Baden Wuerttemberg, DE, Germany
- Tyler L. Bourke
- ORCiD
- SKA Observatory , Jodrell Bank, Lower Withington, Macclesfield SK11 9FT, UK
- Ewine F. Van Dishoeck
- ORCiD
- Leiden Observatory, Universiteit Leiden , Leiden, Zuid-Holland, The Netherlands; Max-Planck Institut für Extraterrestrische Physik , Garching bei München, DE, Germany
- Neal J. Evans II
- ORCiD
- Department of Astronomy, The University of Texas at Austin , 2515 Speedway, Stop C1400, Austin, Texas 78712-1205, USA
- Guillem Anglada
- ORCiD
- Instituto de Astrofísica de Andalucía , CSIC, Glorieta de la Astronomía s/n, E-18008 Granada, ES, Spain
- Mayra Osorio
- ORCiD
- Instituto de Astrofísica de Andalucía , CSIC, Glorieta de la Astronomía s/n, E-18008 Granada, ES, Spain
- Thomas Stanke
- ORCiD
- Max-Planck Institut für Extraterrestrische Physik , Garching bei München, DE, Germany
- James Muzerolle
- ORCiD
- Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA
- Leslie W. Looney
- ORCiD
- Department of Astronomy, University of Illinois , 1002 West Green Street, Urbana, IL 61801, USA; National Radio Astronomy Observatory , 520 Edgemont Road, Charlottesville, VA 22903 USA
- Yao-Lun Yang
- ORCiD
- Star and Planet Formation Laboratory, RIKEN Cluster for Pioneering Research , Wako, Saitama 351-0198, Japan
- Pamela Klaassen
- ORCiD
- United Kingdom Astronomy Technology Centre , Edinburgh, GB, UK
- Nicole Karnath
- ORCiD
- Update to Space Telescope Science Institute , 3700 San Martin Drive, Baltimore, MD 21218, USA; Center for Astrophysics Harvard & Smithsonian , Cambridge, MA, USA
- Prabhani Atnagulov
- ORCiD
- Ritter Astrophysical Research Center, Dept. of Physics and Astronomy, University of Toledo , Toledo, OH, USA
- Nashanty Brunken
- ORCiD
- Leiden Observatory, Universiteit Leiden , Leiden, Zuid-Holland, The Netherlands
- William J. Fischer
- ORCiD
- Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA
- Elise Furlan
- ORCiD
- Caltech/IPAC , Pasadena, CA, USA
- Joel Green
- ORCiD
- Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA
- Nolan Habel
- ORCiD
- Jet Propulsion Laboratory , Pasadena, CA, USA
- Lee Hartmann
- ORCiD
- University of Michigan , Ann Arbor, MI, USA
- Hendrik Linz
- ORCiD
- Max Planck Institute for Astronomy , Heidelberg, Baden Wuerttemberg, DE, Germany; Friedrich-Schiller-Universität , Jena, Thüringen, DE, Germany
- Pooneh Nazari
- ORCiD
- Leiden Observatory, Universiteit Leiden , Leiden, Zuid-Holland, The Netherlands
- Riwaj Pokhrel
- ORCiD
- Ritter Astrophysical Research Center, Dept. of Physics and Astronomy, University of Toledo , Toledo, OH, 43606, USA
- Rohan Rahatgaonkar
- ORCiD
- Gemini South Observatory , La Serena, CL, USA
- Will R. M. Rocha
- ORCiD
- Laboratory for Astrophysics, Leiden Observatory, Universiteit Leiden , Leiden, Zuid-Holland, The Netherlands
- Patrick Sheehan
- ORCiD
- National Radio Astronomy Observatory , 520 Edgemont Road, Charlottesville, VA 22903 USA
- Katerina Slavicinska
- ORCiD
- Leiden Observatory, Universiteit Leiden , Leiden, Zuid-Holland, The Netherlands
- Amelia M. Stutz
- ORCiD
- Departamento de Astronomía, Universidad de Concepción ,Casilla 160-C, Concepción, Chile
- John J. Tobin
- ORCiD
- National Radio Astronomy Observatory , 520 Edgemont Road, Charlottesville, VA 22903 USA
- Lukasz Tychoniec
- ORCiD
- European Southern Observatory , Garching bei München, DE, Germany
- Scott Wolk
- ORCiD
- Center for Astrophysics Harvard & Smithsonian , Cambridge, MA, USA
- DOI
- https://doi.org/10.3847/2041-8213/ad1de3
- Journal volume & issue
-
Vol. 962,
no. 1
p. L16
Abstract
Investigating Protostellar Accretion (IPA) is a JWST Cycle 1 GO program that uses NIRSpec integral field units and MIRI Medium Resolution Spectrograph to obtain 2.9–28 μ m spectral cubes of young, deeply embedded protostars with luminosities of 0.2–10,000 L _⊙ and central masses of 0.15–12 M _⊙ . In this Letter, we report the discovery of a highly collimated atomic jet from the Class 0 protostar IRAS 16253−2429, the lowest-luminosity source ( L _bol = 0.2 L _⊙ ) in the IPA program. The collimated jet is detected in multiple [Fe ii ] lines and [Ne ii ], [Ni ii ], and H i lines but not in molecular emission. The atomic jet has a velocity of about 169 ± 15 km s ^−1 , after correcting for inclination. The width of the jet increases with distance from the central protostar from 23 to 60 au, corresponding to an opening angle of 2.°6 ± 0.°5. By comparing the measured flux ratios of various fine-structure lines to those predicted by simple shock models, we derive a shock speed of 54 km s ^−1 and a preshock density of 2.0 × 10 ^3 cm ^−3 at the base of the jet. From these quantities and using a suite of jet models and extinction laws, we compute a mass-loss rate between 0.4 and 1.1 ×10 ^−10 M _⊙ yr ^−1 . The low mass-loss rate is consistent with simultaneous measurements of low mass accretion rate (2.4 ± 0.8 × 10 ^−9 M _⊙ yr ^−1 ) for IRAS 16253−2429 from JWST observations, indicating that the protostar is in a quiescent accretion phase. Our results demonstrate that very low-mass protostars can drive highly collimated, atomic jets, even during the quiescent phase.
Keywords
