A revised distance to IRAS 16293-2422 from VLBA astrometry of associated water masers
نویسندگان
چکیده
منابع مشابه
The magnetic field of IRAS 16293-2422 as traced by shock-induced H2O masers
Context. Shock-induced H2O masers are important magnetic field tracers of very high density gas. Water masers are found in both highand low-mass star-forming regions, and are a powerful tool for comparing magnetic field morphologies in both mass regimes. Aims. We present one of the first magnetic field determinations for the low-mass protostellar core IRAS 16293-2422 at volume densities as high...
متن کاملDoes Iras 16293–2422 Contain a Hot Core? New Interferometric Results
High angular resolution H2CO line observations have been carried out for the low mass proto-binary star IRAS 16293–2422 using the OVROmillimeter array. Simultaneous continuum observations reveal that the source most probably contains two accretion disks, less than ∼ 250AU in size, through which matter is fed onto the stars. The observations suggest that the binary has cleared most of the materi...
متن کاملIRAS 16293-2422: Evidence for Infall onto a Counter-Rotating Protostellar Accretion Disk
We report high spatial resolution VLA observations of the low-mass starforming region IRAS 16293-2422 using four molecular probes: ethyl cyanide (CH3CH2CN), methyl formate (CH3OCHO), formic acid (HCOOH), and the ground vibrational state of silicon monoxide (SiO). Ethyl cyanide emission has a spatial scale of ∼20 and encompasses binary cores A and B as determined by continuum emission peaks. Sur...
متن کاملDetection of OD towards the low-mass protostar IRAS 16293−2422⋆
Context. Although water is an essential and widespread molecule in star-forming regions, its chemical formation pathways are still not very well constrained. Observing the level of deuterium fractionation of OH, a radical involved in the water chemical network, is a promising way to infer its chemical origin. Aims. We aim at understanding the formation mechanisms of water by investigating the o...
متن کاملPhysical - chemical modeling of the low - mass protostar IRAS 16293 - 2422
We present detailed gas-phase chemical models for the envelope of the low-mass star-forming region IRAS 16293-2422. By considering both timeand space-dependent chemistry, these models are used to study both the physical structure proposed by Schöier et al. (2002), as well as the chemical evolution of this region. A new feature of our study is the use of a detailed, self-consistent radiative tra...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2018
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361/201732093