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FAUST - XXII. Deuteration in the VLA1623-2417 protostellar hot-corinos, cavities, and streamers
The study of deuterium fractionation is a valuable tool for reconstructing our chemical history from the early prestellar stages to the formation of planets. In the context of the ALMA Large Programme FAUST, we observed formaldehyde, H CO, and its singly and doubly deuterated forms, HDCO and D CO, towards the protostellar cluster VLA1623–2417, on scales of ∼2000 − 50 au.
Accurate proper motions of the protostellar binary system L 1551 IRS 5
Large conventional radio interferometers such as the Karl G. Jansky Very Large Array (VLA) or the Atacama Large Millimeter/submillimeter Array (ALMA) can routinely provide astrometric measurements with an accuracy of the order of 10 milliarcsec (mas–Loinard 2002; Rodríguez et al. 2003a; Chandler et al. 2005; Loinard et al. 2007; Dzib et al. 2017; Hernández-Gómez et al. 2019; Maureira et al. 2020).
The symbiotic recurrent nova V745 Sco at radio wavelengths
A nova is a thermonuclear explosion that ignites at the bottom of a layer of accreted material on a white dwarf (WD) in a binary system (Gallagher & Starrfield 1978; Bode & Evans 2008; Chomiuk, Metzger & Shen 2021a). The companion star is usually a main-sequence star, but is occasionally a more evolved sub-giant or giant star. The companion transfers H-rich gas onto the WD, accumulating an envelope of accreted material on its surface.
Multiple chemical tracers finally unveil the intricate NGC 1333 IRAS 4A outflow system. FAUST XVI
The exploration of outflows in protobinary systems presents a challenging yet crucial endeavour, offering valuable insights into the dynamic interplay between protostars and their evolution. In this study, we examine the morphology and dynamics of jets and outflows within the IRAS 4A protobinary system. This analysis is based on ALMA observations of SiO(5–4), H CO(3 –2 ), and HDCO(4 –3 ) with a spatial resolution of ∼150 au.
FAUST XII. Accretion streamers and jets in the VLA 1623-2417 protocluster
The low-mass star forming process takes a dense core of gas and dust inside a molecular cloud and leaves a Sun-like star possibly surrounded by its planetary system (Shu 1977). Historically, the youngest two classes of Sun-like protostars have been classified in Class 0 and Class I objects (André, Ward-Thompson & Barsony 1993; Andre, Ward-Thompson & Barsony 2000), being 104 and 105 yr old, respectively.
Panchromatic (Sub)millimeter Polarization Observations of HL Tau Unveil Aligned Scattering Grains
Polarization is a unique tool to study the dust grains of protoplanetary disks. Polarization around HL Tau was previously imaged using the Atacama Large Millimeter/submillimeter Array (ALMA) at Bands 3 (3.1 mm), 6 (1.3 mm), and 7 (0.87 mm), showing that the polarization orientation changes across wavelength λ. Polarization at Band 7 is predominantly parallel to the disk minor axis but appears azimuthally oriented at Band 3, with the morphology at Band 6 in between the two.
Synchrotron emission from double-peaked radio light curves of the symbiotic recurrent nova V3890 Sagitarii
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