Revised SED of the triple protostellar system VLA 1623-2417

Abstract

VLA 1623$-$2417 is a triple protostellar system deeply embedded in Ophiuchus A. Sources A and B have a separation of 1.1", making their study difficult beyond the submillimeter regime. Lack of circumstellar gas emission suggested that VLA 1623$-$2417 B has a very cold envelope and is much younger than source A, generally considered the prototypical Class 0 source. We explore the consequences of new ALMA Band 9 data on the spectral energy distribution (SED) of VLA 1623$-$2417 and their inferred nature. Using dust continuum observations spanning from centimeter to near-infrared wavelengths, the SED of each component in VLA 1623$-$2417 is constructed and analysed. The ALMA Band 9 data presented here show that the SED of VLA 1623$-$2417 B does not peak at 850 $\mu$m as previously expected, but instead presents the same shape as VLA 1623$-$2417 A at wavelengths shorter than 450 $\mu$m. The results presented here indicate that the previous assumption that the flux in $Herschel$ and Spitzer observations is solely dominated by VLA 1623$-$2417 A is not valid, and instead, VLA 1623$-$2417 B most likely contributes a significant fraction of the flux at $\lambda <$ 450 $\mu$m. These results, however, do not explain the lack of circumstellar gas emission and puzzling nature of VLA 1623$-$2417 B.

arXiv comment6 pages, 2 figures, accepted to A&A letters to the editor

References in corpus (27)

• Herschel Space Observatory - An ESA facility for far-infrared and submillimetre astronomy
• From filamentary clouds to prestellar cores to the stellar IMF: Initial highlights from the Herschel Gould Belt survey
• A Spitzer Survey of Young Stellar Clusters within One Kiloparsec of the Sun: Cluster Core Extraction and Basic Structural Analysis
• The Submillimeter Array
• The SMART Data Analysis Package for the Infrared Spectrograph on the Spitzer Space Telescope
• Unveiling the Circumstellar Envelope and Disk: A Sub-Arcsecond Survey of Circumstellar Structures
• PROSAC: A Submillimeter Array survey of low-mass protostars. II. The mass evolution of envelopes, disks, and stars from the Class 0 through I stages
• A Keplerian disk around a Class 0 source: ALMA observations of VLA1623A
• The Gould's Belt Distances Survey (GOBELINS) I. Trigonometric parallax distances and depth of the Ophiuchus complex
• The Herschel-PACS photometer calibration: Point-source flux calibration for scan maps
• Herschel observations of B1-bS and B1-bN: two first hydrostatic core candidates in the Perseus star-forming cloud
• Advanced optimal extraction for the Spitzer/IRS
• Molecule sublimation as a tracer of protostellar accretion: Evidence for accretion bursts from high angular resolution C18O images
• Disentangling the entangled: Observations and analysis of the triple non-coeval protostellar system VLA1623
• Chemical tracers of episodic accretion in low-mass protostars
• How do stars gain their mass? A JCMT/SCUBA-2 Transient Survey of Protostars in Nearby Star Forming Regions
• The JCMT Transient Survey: Stochastic and Secular Variability of Protostars and Disks In the Sub-Millimeter Observed Over Eighteen Months
• Two Extreme Young Objects in Barnard 1-b
• Protostellar accretion traced with chemistry. High resolution C18O and continuum observations towards deeply embedded protostars in Perseus
• Constraining the physical structure of the inner few 100 AU scales of deeply embedded low-mass protostars
• Tracing the cold and warm physico-chemical structure of deeply embedded protostars: IRAS 16293-2422 versus VLA 1623-2417
• A low-mass protostar's disk-envelope interface: disk-shadowing evidence from ALMA DCO+ observations of VLA1623
• Probing Episodic Accretion in Very Low Luminosity Objects
• Do siblings always form and evolve simultaneously? Testing the coevality of multiple protostellar systems through SEDs
• Herschel survey of brown dwarf disks in Rho Ophiuchi
• Disentangling the jet emission from protostellar systems. The ALMA view of VLA1623
• The immediate environment of the Class 0 protostar VLA1623, on scales of ~50-100 AU, observed at millimetre and centimetre wavelengths

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• FAUST III. Misaligned rotations of the envelope, outflow, and disks in the multiple protostellar system of VLA 1623$-$2417
• FAUST VIII. The protostellar disk of VLA 1623-2417 W and its streamers imaged by ALMA
• ORion Alma New GEneration Survey (ORANGES) I. Dust continuum and free-free emission of OMC-2/3 filament protostars
• FAUST VI. VLA 1623--2417 B: a new laboratory for astrochemistry around protostars on 50 au scale
• A millimeter-multiwavelength continuum study of VLA 1623 West
• FAUST. XXVIII. High-Resolution ALMA Observations of Class 0/I Disks: Structure, Optical Depths, and Temperatures
• Constraining the Stellar Masses and Origin of the Protostellar VLA 1623 System
• The JCMT Transient Survey: Four Year Summary of Monitoring the Submillimeter Variability of Protostars