Anatomy of the Class I protostar L1489 IRS with NOEMA - II. A disk replenished by a massive streamer

Abstract

(abridged) Streamers are newly identified channels that transport mass from large, molecular-cloud scales down to small, protoplanetary-disk scales. To better understand their impact on planet formation, it is essential to study their physical and chemical properties. In this framework, we aim to characterize the longest streamer identified in carbon chain emission within the Class I system L1489 IRS, connecting the nearby prestellar core L1489 to the young stellar object (YSO). We observed multiple transitions of C${}_2$H, ortho-c-C${}_3$H${}_2$, and HC${}_3$N in L1489 IRS with NOEMA and IRAM-30m at 3mm and 2mm. Using a variety of radiative transfer methods, including a hyperfine structure (HFS) fitting, rotational diagrams, and proposing a new self-consistent Markov chain Monte Carlo (MCMC) approach combined with the non-LTE RADEX code, we derived the column densities and abundances of those molecules, as well as the H${}_2$ number density along the streamer. This enabled us to estimate its mass, infall rate, and its impact on the {star+disk} system's mass. We found lower limits on the streamer mass of $\ge (4.67-18.3)\times 10^{-3}$ $M_{\odot }$ (i.e., $\ge 0.65-2.57$ times the current disk mass) and an infall rate of $\ge (1.94-7.57)\times 10^{-7}$ $M_{\odot }$ yr${}^{-1}$, where the ranges correspond to the different molecular tracers. These values are consistent with those derived in similar Class I objects. This suggests that the disk could be fully replenished by streamer material. Given its mass, the streamer is likely at the origin of the external warped disk seen in this system, as predicted by numerical simulations. Moreover, the first investigations based on the C${}_2$H/c-C${}_3$H${}_2$ and HC${}_3$N/c-C${}_3$H${}_2$ abundance ratios suggest that the streamer chemistry may be inherited from the core. These results suggest, for the first time, that the chemical composition of a Class I object is [...]

18 pages, 12 figures, 9 tables. Accepted for publication in A&A

References in corpus (41)

• Array Programming with NumPy
• The Astropy Project: Sustaining and Growing a Community-oriented Open-source Project and the Latest Major Release (v5.0) of the Core Package
• MAMBO Mapping of Spitzer c2d Small Clouds and Cores
• A protostellar system fed by a streamer of 10,500 au length
• The chemistry and spatial distribution of small hydrocarbons in UV-irradiated molecular clouds: the Orion Bar PDR
• Molecular gas in the Herschel-selected strongly lensed submillimeter galaxies at z~2-4 as probed by multi-J CO lines
• ALMA Observations of Infalling Flows toward the Keplerian Disk around the Class I Protostar L1489 IRS
• Disk Evolution Study Through Imaging of Nearby Young Stars (DESTINYS): Late infall causing disk misalignment and dynamic structures in SU Aur
• ALMA chemical survey of disk-outflow sources in Taurus (ALMA-DOT) VI: Accretion shocks in the disk of DG Tau and HL Tau
• A survey of C2H, HCN, and C18O in protoplanetary disks
• PRODIGE -- Envelope to disk with NOEMA I. A 3000 au streamer feeding a Class I protostar
• Misaligned disks induced by infall
• A Substellar-Mass Protostar and its Outflow of IRAS 15398-3359 Revealed by Subarcsecond-Resolution Observations of H${}_2$CO and CCH
• A case of simultaneous star and planet formation
• Complex Organic Molecules Towards Embedded Low-Mass Protostars
• Disk Masses for Embedded Class I Protostars in the Taurus Molecular Cloud
• A 3D view of the Taurus star-forming region by Gaia and Herschel: multiple populations related to the filamentary molecular cloud
• PRODIGE -- Envelope to Disk with NOEMA II. Small-scale temperature structure and a streamer feeding the SVS13A protobinary using CH3CN and DCN
• Structure and dynamics of the class I young stellar object L1489 IRS
• Reflections on nebulae around young stars: A systematic search for late-stage infall of material onto Class II disks
• ALMA chemical survey of disk-outflow sources in Taurus (ALMA-DOT) V: Sample, overview, and demography of disk molecular emission
• Disk structure around the Class I protostar L1489 IRS revealed by ALMA: a warped disk system
• Accretion Flows or Outflow Cavities? Uncovering the Gas Dynamics around Lupus 3-MMS
• A Tail Structure Associated with Protoplanetary Disk around SU Aurigae
• Large-scale CO spiral arms and complex kinematics associated with the T Tauri star RU Lup
• Early Planet Formation in Embedded Disks (eDisk). IV. The Ringed and Warped Structure of the Disk around the Class I Protostar L1489 IRS
• Flow of gas detected from beyond the filaments to protostellar scales in Barnard 5
• Precise observations of the 12C/13C ratios of HC3N in the low-mass star-forming region L1527
• Probing the Physics of Star-Formation (ProPStar): II. The first systematic search for streamers toward protostars
• Stellar and Circumstellar Properties of Class I Protostars
• Molecular Mapping of DR Tau's Protoplanetary Disk, Envelope, Outflow, and Large-Scale Spiral Arm
• Disk Evolution Study Through Imaging of Nearby Young Stars (DESTINYS): A Panchromatic View of DO Tau's Complex Kilo-au Environment
• FAUST XVII: Super deuteration in the planet forming system IRS 63 where the streamer strikes the disk
• Constraints on the (re-)orientation of star-disk systems through infall
• Which Part of Dense Cores Feeds Material to Protostars?: The Case of L1489 IRS
• Similar levels of deuteration in the pre-stellar core L1544 and the protostellar core HH211
• Anatomy of the Class I protostar L1489 IRS with NOEMA -- I. Disk, streamers, outflow(s) and bubbles at 3mm
• Dust properties of the cometary globule Barnard 207 (LDN 1489)
• A particular carbon-chain-producing region: L1489 starless core
• Carbon-chain molecule survey toward four low-mass molecular outflow sources
• Chemistry and ro-vibrational excitation of HeH${}^{+}$ in the Planetary Nebula NGC 7027

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