Disentangling the outflow and protostars in HH 900 in the Carina Nebula
arXiv:1501.06564 · doi:10.1093/mnras/stv177
Abstract
HH 900 is a peculiar protostellar outflow emerging from a small, tadpole-shaped globule in the Carina nebula. Previous Hα imaging with HST/ACS showed an ionized outflow with a wide opening angle that is distinct from the highly collimated structures typically seen in protostellar jets. We present new narrowband near-IR [Fe II] images taken with the Wide Field Camera 3 on the Hubble Space Telescope that reveal a remarkably different structure than Hα. In contrast to the unusual broad Hα outflow, the [Fe II] emission traces a symmetric, collimated bipolar jet with the morphology and kinematics that are more typical of protostellar jets. In addition, new Gemini adaptive optics images reveal near-IR H emission coincident with the Hα emission, but not the [Fe II]. Spectra of these three components trace three separate and distinct velocity components: (1) H from the slow, entrained molecular gas, (2) Hα from the ionized skin of the accelerating outflow sheath, and (3) [Fe II] from the fast, dense, and collimated protostellar jet itself. Together, these data require a driving source inside the dark globule that remains undetected behind a large column density of material. In contrast, Hα and H emission trace the broad outflow of material entrained by the jet, which is irradiated outside the globule. As it get dissociated and ionized, it remains visible for only a short time after it is dragged into the H II region.
arXiv commentaccepted to MNRAS
References in corpus (47)
- Interpreting Spectral Energy Distributions from Young Stellar Objects. I. A grid of 200,000 YSO model SEDs
- The Relation Between Optical Extinction and Hydrogen Column Density in the Galaxy
- An ACS Survey of Globular Clusters V: Star Catalog for Each Cluster
- Which jet launching mechanism(s) in TTauri stars?
- The Mass Distribution and Lifetime of Prestellar Cores in Perseus, Serpens, and Ophiuchus
- The Evolution of Outflow-Envelope Interactions in Low-Mass Protostars
- New Limits on an Intermediate Mass Black Hole in Omega Centauri: I. Hubble Space Telescope Photometry and Proper Motions
- Comparing Star Formation on Large Scales in the c2d Legacy Clouds: Bolocam 1.1 mm Dust Continuum Surveys of Serpens, Perseus, and Ophiuchus
- Formation of the Widest Binaries from Dynamical Unfolding of Triple Systems
- A Census of the Carina Nebula. I: Cumulative Energy Input from Massive Stars
- A hot compact dust disk around a massive young stellar object
- Gemini multi-conjugate adaptive optics system review I: Design, trade-offs and integration
- Ionisation-induced star formation I: The collect and collapse model
- Irradiated Herbig-Haro Jets in the Orion Nebula and Near NGC 1333
- A Pan-Carina YSO Catalog: Intermediate-Mass Young Stellar Objects in the Carina Nebula Identified Via Mid-Infrared Excess Emission
- Recipes for stellar jets: results of combined optical/infrared diagnostics
- The M31 Velocity Vector. I. Hubble Space Telescope Proper Motion Measurements
- Gemini multi-conjugate adaptive optics system review II: Commissioning, operation and overall performance
- Explosive Outflows Powered by the Decay of Non-Hierarchical Multiple Systems of Massive Stars: Orion BN/KL
- Non-Equilibrium Photodissociation Regions: Ionization-Dissociation Fronts
- ALMA Observations of the HH 46/47 Molecular Outflow
- A Multi-Epoch Study of the Radio Continuum Emission of Orion Source I: Constraints on the Disk Evolution of a Massive YSO and the Dynamical History of Orion BN/KL
- Infrared [Fe II] emission from P Cygni's nebula: Atomic data, mass, kinematics, and the 1600 A.D. outburst
- Ionisation-induced star formation II: External irradiation of a turbulent molecular cloud
- HST/ACS H-alpha Imaging of the Carina Nebula: Outflow Activity Traced by Irradiated Herbig-Haro Jets
- A Deep HST Study of the Globular Cluster NGC 6397: Reduction Methods
- ALMA detection of the rotating molecular disk wind from the young star HD 163296
- Clustered Star Formation in W75 N
- ALMA observations of a high-density core in Taurus: dynamical gas interaction at the possible site of a multiple star formation
- Orphaned Protostars
- Bow shocks, Wiggling Jets, and Wide-Angle Winds: A High Resolution Study of the Entrainment Mechanism of the PV Ceph Molecular (CO) Outflow
- Resolving the Circumstellar Disk Around the Massive Protostar Driving the HH 80-81 Jet
- The Chandra Carina Complex Project View of Trumpler 16
- The Systemic Velocity of Eta Carinae
- HST/WFC3 Imaging of Protostellar Jets in Carina: [Fe II] Emission Tracing Massive Jets from Intermediate Mass Protostars
- Carina's Defiant Finger: HST Observations of a Photoevaporating Globule in NGC3372
- On the nature of outflows in intermediate-mass protostars: a case study of IRAS 20050+2720
- ATCA 3mm observations of NGC6334I and I(N): dense cores, outflows and an UCHII region
- A Survey of Irradiated Pillars, Globules, and Jets in the Carina Nebul
- Jet-driving protostars identified from infrared observations of the Carina Nebula complex
- Detection of a large massive circumstellar disk around a high-mass young stellar object in the Carina Nebula
- A hot molecular outflow driven by the ionized jet associated with IRAS 16562-3959
- Anatomy of HH 111 from CO observations : a bow shock driven molecular outflow
- The tiny globulettes in the Carina Nebula
- Proper Motion of the Irradiated Jet HH 399 in the Trifid Nebula
- Kinematics of powerful jets from intermediate-mass protostars in the Carina nebula
- [Fe II] 1.64 um Features of Jets and Outflows from Young Stellar Objects in the Carina Nebula
Cited by in corpus (12)
- Ancient eruptions of Eta Carinae: A tale written in proper motions
- Proper motions of collimated jets from intermediate-mass protostars in the Carina Nebula
- [Fe II] jets from intermediate-mass protostars in Carina
- HH 666: Different kinematics from Hα and [Fe II] emission provide a missing link between jets and outflows
- Massive star formation by accretion II. Rotation: how to circumvent the angular momentum barrier?
- Illuminating the Tadpole's metamorphosis I: MUSE observations of a small globule in a sea of ionizing photons
- Near-IR imaging towards a puzzling YSO precessing jet
- Illuminating a tadpole's metamorphosis III: quantifying past and present environmental impact
- Illuminating a tadpole's metamorphosis II: observing the on-going transformation with ALMA
- Proper motions of five OB stars with candidate dusty bow shocks in the Carina Nebula
- The Intricate Structure of HH 508, the Brightest Microjet in the Orion Nebula
- The Dusty Silhouette Jet HH 1019 in the Carina Nebula