Proper motions of young stellar outflows in the mid-infrared with Spitzer II HH 377/Cep E

Noriega-Crespo, A.; Raga, A. C.; Moro‐Martín, Amaya; Flagey, Nicolas; Carey, Sean

doi:10.1088/1367-2630/16/10/105008

Cited by 11 publications

(14 citation statements)

References 57 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Research areas concerning strong magnetic fields focus on the study of experimentally observed highly excited atomic and molecular states (i.e., Rydberg states) in magnetic fields, fundamental aspects such as nuclear dynamics and nonadiabatic effects of atomic/molecular structure in strong magnetic fields and also calculations regarding the electronic structure of atoms, molecules, and condensed matter in magnetic fields . In a recent study, it has been shown that H 2 molecular gas moves at highly supersonic velocities without getting dissociated, which suggests either a very efficient mechanism to reform H 2 molecules or the shielding of H 2 gas by a strong magnetic field.…”

Section: Introductionmentioning

confidence: 99%

Reactivity dynamics of a confined molecule in presence of an external magnetic field

Khatua

Sarkar

Chattaraj

2014

Int J of Quantum Chemistry

View full text Add to dashboard Cite

Reactivity dynamics and stability of a confined hydrogen molecule in presence of an external magnetic field has been studied using quantum fluid density functional theory. Dynamic profiles of various reactivity parameters such as hardness, electrophilicity, magnetizability, phase volume, entropy, etc. have been studied within a confined environment. Responses in the reactivity parameters as well as the associated electronic structure principles validate the stability of the confined H2 molecule in ground and excited states in presence of an external magnetic field. Confinement to the system has been imposed by the Dirichlet type boundary condition. Confinement and excitation act in opposite directions. Ground state type dynamics is obtained on simultaneous electronic excitation and confinement. © 2014 Wiley Periodicals, Inc.

show abstract

Section: Introductionmentioning

confidence: 99%

Reactivity dynamics of a confined molecule in presence of an external magnetic field

Khatua

Sarkar

Chattaraj

2014

Int J of Quantum Chemistry

View full text Add to dashboard Cite

show abstract

“…In the following, a brief description of the principal outcomes from the papers published in this New Journal of Physics focus issue is given. Noriega-Crespo et al (2014) show that tangential velocities of the north and south bipolar Cep E outflow lobes are slightly different (62 ± 26 km s −1 and 94 ± 26 km s −1 , respectively). Both observations and models agree on the fact that the molecular hydrogen gas moves at high supersonic velocities without being dissociated.…”

mentioning

confidence: 86%

Focus on astrophysical jets

Tordella

2015

New J. Phys.

View full text Add to dashboard Cite

“…The proper motions of the H 2 bright shock structures, NB and HH377, were determined by Noriega-Crespo et al (2014) and correspond to tangential velocities of (70 ± 32) km s −1 and (106 ± 29) km s −1 for the northern and southern components, respectively, after correcting for the recently revised distance to Cep E-mm (820 pc instead of 730 pc). Taking into account the radial jet velocity determination from the CO observations, this results in an revised jet inclination angle of 47 • with respect to the plane of the sky, close to the determination by Lefloch et al (2015).…”

Section: The Sourcementioning

confidence: 99%

Mass ejection and time variability in protostellar outflows: Cep E. SOLIS XVI

Schutzer,

Rivera-Ortiz,

Lefloch

et al. 2022

Preprint

View full text Add to dashboard Cite

Context. Protostellar jets are an important agent of star formation feedback, tightly connected with the mass-accretion process. The history of jet formation and mass-ejection provides constraints on the mass accretion history and the nature of the driving source. Aims. We want to characterize the time-variability of the mass-ejection phenomena at work in the Class 0 protostellar phase, in order to better understand the dynamics of the outflowing gas and bring more constraints on the origin of the jet chemical composition and the mass-accretion history. Methods. Using the NOEMA (NOrthern Extended Millimeter Array) interferometer, we have observed the emission of the CO 2-1 and SO N J = 5 4 -4 3 rotational transitions at an angular resolution of 1.0 (820 au) and 0.4 (330 au), respectively, towards the intermediate-mass Class 0 protostellar system Cep E. Results. The CO high-velocity jet emission reveals a central component of ≤ 400 au diameter associated with high-velocity molecular knots, also detected in SO, surrounded by a collimated layer of entrained gas. The gas layer appears to accelerate along the main axis over a length scale δ 0 ≈ 700 au, while its diameter gradually increases up to several 1000 au at 2000 au from the protostar. The jet is fragmented into 18 knots of mass ∼ 10 −3 M , unevenly distributed between the northern and southern lobes, with velocity variations up to 15 km s −1 close to the protostar, well below the jet terminal velocities in the northern (+65 km s −1 ) and southern (−125 km s −1 ) lobes, respectively. The knot interval distribution is approximately bi-modal with a time scale of ∼ 50 − 80 yr close to the jet driving protostar Cep E-A and ∼ 150 − 200 yr at larger distances > 12 . The mass-loss rates derived from knot masses are overall steady, with values of 2.7 × 10 −5 M yr −1 and 8.9 × 10 −6 M yr −1 in the northern and southern lobe, respectively. Conclusions. The interaction of the ambient protostellar material with high-velocity knots drives the formation of a molecular layer around the jet, which accounts for the higher mass-loss rate in the northern lobe. The jet dynamics are well accounted for by a simple precession model with a period of 2000 yr and a mass-ejection period of 55 yr.

show abstract

Proper motions of young stellar outflows in the mid-infrared with Spitzer II HH 377/Cep E

Cited by 11 publications

References 57 publications

Reactivity dynamics of a confined molecule in presence of an external magnetic field

Reactivity dynamics of a confined molecule in presence of an external magnetic field

Focus on astrophysical jets

Mass ejection and time variability in protostellar outflows: Cep E. SOLIS XVI

Contact Info

Product

Resources

About