A high-resolution radio study of the L1551 IRS 5 and L1551 NE jets
arXiv:2307.12746 · doi:10.1051/0004-6361/202346737
Abstract
Using observations with e-MERLIN and the VLA, together with archival data from ALMA, we obtain high-resolution radio images of two binary YSOs: L1551 IRS 5 and L1551 NE, covering a wide range of frequencies from 5 - 336 GHz, and resolving emission from the radio jet on scales of only ~15 au. By comparing these observations to those from a previous epoch, it is shown that there is a high degree of variability in the free-free emission from the jets of these sources. In particular, the northern component of L1551 IRS 5 shows a remarkable decline in flux density of a factor of ~5, suggesting that the free-free emission of this source has almost disappeared. By fitting the spectra of the sources, the ionised mass-loss rates of the jets are derived and it is shown that there is significant variability of up to a factor of ~6 on timescales of ~20 years. Using radiative transfer modelling, we also obtained a model image for the jet of the southern component of L1551 IRS 5 to help study the inner region of the ionised high-density jet. The findings favour the X-wind model launched from a very small innermost region.
13 pages, 7 figures, accepted for publication in A&A
References in corpus (17)
- CASA, the Common Astronomy Software Applications for Radio Astronomy
- The Radial Distribution of Dust Particles in the HL Tau Disk from ALMA and VLA Observations
- Jets from Young Stars
- Transition from the Infalling Envelope to the Keplerian Disk around L1551 IRS 5
- Spiral Arms, Infall, and Misalignment of the Circumbinary Disk from the Circumstellar Disks in the Protostellar Binary System L1551 NE
- Active-Region Tilt Angles: Magnetic Versus White-Light Determinations of Joy's Law
- A Spitzer Five-Band Analysis of the Jupiter-Sized Planet TrES-1
- Angular Momentum Exchange by Gravitational Torques and Infall in the Circumbinary Disk of the Protostellar System L1551 NE
- The Collimated Jet Source in IRAS 16547-4247: Time Variation, Possible Precession, and Upper Limits to the Proper Motions Along the Jet Axis
- An Ionized Outflow from AB Aur, a Herbig Ae Star with a Transitional Disk
- Herbig-Haro flows in B335
- Zooming into the Collimation Zone in a Massive Protostellar Jet
- Rotationally-Driven Fragmentation for the Formation of the Binary Protostellar System L1551 IRS 5
- Circumbinary Disks of the Protostellar Binary Systems in the L1551 Region
- Formation of the Unequal-Mass Binary Protostars in L1551 NE by Rotationally-Driven Fragmentation
- Evolution of the atomic component in protostellar outflows
- Resolving the collimation zone of an intermediate-mass protostar