Linking interstellar and cometary O${}_2$: a deep search for ${}^{16}$O${}^{18}$O in the solar-type protostar IRAS 16293--2422

Abstract

Recent measurements carried out at comet 67P/C-G with the $Rosetta$ probe revealed that molecular oxygen, O${}_2$, is the fourth most abundant molecule in comets. Models show that O${}_2$ is likely of primordial nature, coming from the interstellar cloud from which our Solar System was formed. However, gaseous O${}_2$ is an elusive molecule in the interstellar medium with only one detection towards quiescent molecular clouds, in the $\rho$ Oph A core. We perform a deep search for molecular oxygen, through the $2_1-0_1$ rotational transition at 234 GHz of its ${}^{16}$O${}^{18}$O isotopologue, towards the warm compact gas surrounding the nearby Class 0 protostar IRAS 16293--2422 B with the ALMA interferometer. The targeted ${}^{16}$O${}^{18}$O transition is surrounded by two brighter transitions at $\pm 1$ km s${}^{-1}$ relative to the expected ${}^{16}$O${}^{18}$O transition frequency. After subtraction of these two transitions, residual emission at a 3$\sigma$ level remains, but with a velocity offset of $0.3-0.5$ km s${}^{-1}$ relative to the source velocity, rendering the detection "tentative". We derive the O${}_2$ column density for two excitation temperatures $T_{\mathrm{ex}}$ of 125 and 300 K, as indicated by other molecules, in order to compare the O${}_2$ abundance between IRAS16293 and comet 67P/C-G. Assuming that ${}^{16}$O${}^{18}$O is not detected and using methanol CH${}_3$OH as a reference species, we obtain a [O${}_2$]/[CH${}_3$OH] abundance ratio lower than $2-5$, depending on the assumed $T_{\mathrm{ex}}$, a three to four times lower abundance than the [O${}_2$]/[CH${}_3$OH] ratio of $5-15$ found in comet 67P/C-G. Such a low O${}_2$ abundance could be explained by the lower temperature of the dense cloud precursor of IRAS16293 with respect to the one at the origin of our Solar System that prevented an efficient formation of O${}_2$ in interstellar ices.

arXiv comment12 pages, 3 figures, accepted for publication in Astronomy & Astrophysics

References in corpus (39)

• From filamentary clouds to prestellar cores to the stellar IMF: Initial highlights from the Herschel Gould Belt survey
• Observations of the Icy Universe
• The Cologne Database for Molecular Spectroscopy, CDMS, in the Virtual Atomic and Molecular Data Centre, VAMDC
• The Spitzer ice legacy: Ice evolution from cores to protostars
• Unveiling the Circumstellar Envelope and Disk: A Sub-Arcsecond Survey of Circumstellar Structures
• The ALMA Protostellar Interferometric Line Survey (PILS): First results from an unbiased submillimeter wavelength line survey of the Class 0 protostellar binary IRAS 16293-2422 with ALMA
• Astrometry of Water Maser Sources in Nearby Molecular Clouds with VERA - II. SVS 13 in NGC 1333
• The ALMA-PILS survey: Isotopic composition of oxygen-containing complex organic molecules toward IRAS 16293-2422B
• Mapping ices in protostellar environments on 1000 AU scales: Methanol-rich ice in the envelope of Serpens SMM 4
• The Gould's Belt Distances Survey (GOBELINS) I. Trigonometric parallax distances and depth of the Ophiuchus complex
• The c2d Spitzer Spectroscopic Survey of Ices Around Low-Mass Young Stellar Objects. IV. NH3 and CH3OH
• Herschel Measurements of Molecular Oxygen in Orion
• IRAS 16293-2422: proper motions, jet precession, the hot core, and the unambiguous detection of infall
• Hipparcos distances of Ophiuchus and Lupus cloud complexes
• TIMASSS: The IRAS16293-2422 Millimeter And Submillimeter Spectral Survey. I. Observations, calibration and analysis of the line kinematics
• Formation of Hydrogen, Oxygen, and Hydrogen Peroxide in Electron Irradiated Crystalline Water Ice
• The ALMA-PILS survey: First detections of deuterated formamide and deuterated isocyanic acid in the interstellar medium
• Molecular oxygen in the rho Ophiuchi cloud
• The first ALMA view of IRAS 16293-2422: Direct detection of infall onto source B and high-resolution kinematics of source A
• The ALMA-PILS survey: First detections of ethylene oxide, acetone and propanal toward the low-mass protostar IRAS 16293-2422
• The ALMA-PILS survey: The sulphur connection between protostars and comets: IRAS 16293-2422 B and 67P/Churyumov-Gerasimenko
• The ALMA-PILS survey: Detection of CH${}_3$NCO toward the low-mass protostar IRAS 16293-2422 and laboratory constraints on its formation
• Arcsecond resolution images of the chemical structure of the low-mass protostar IRAS 16293-2422
• Multi-line detection of O2 toward rho Oph A
• The ALMA Band 9 receiver - Design, construction, characterization, and first light
• A primordial origin for molecular oxygen in comets: A chemical kinetics study of the formation and survival of O${}_2$ ice from clouds to disks
• The ALMA-PILS survey: Formaldehyde deuteration in warm gas on small scales toward IRAS 16293-2422 B
• ALMA 690 GHz observations of IRAS 16293-2422B: Infall in a highly optically-thick disk
• Deep observations of O2 toward a low-mass protostar with Herschel-HIFI
• Warm water deuterium fractionation in IRAS 16293-2422 - The high-resolution ALMA and SMA view
• A revised distance to IRAS 16293$-$2422 from VLBA astrometry of associated water masers
• Origin of molecular oxygen in Comet 67P/Churyumov-Gerasimenko
• First detection of cyanamide (NH${}_2$CN) towards solar-type protostars
• Molecular Oxygen in Oort Cloud Comet 1P/Halley
• The ALMA-PILS survey: 3D modeling of the envelope, disks and dust filament of IRAS 16293-2422
• Protostellar holes: Spitzer Space Telescope observations of the protostellar binary IRAS16293-2422
• Herschel HIFI observations of O${}_2$ toward Orion: special conditions for shock enhanced emission
• H${}_2$O and O${}_2$ Absorption in the Coma of Comet 67P/Churyumov-Gerasimenko Measured by the Alice Far-Ultraviolet Spectrograph on Rosetta
• O18O and C18O observations of rho Oph A

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