Fate and detectability of rare gas hydride ions in nova ejecta: A case study with nova templates

Abstract

HeH${}^{+}$ was the first heteronuclear molecule to form in the metal-free Universe after the Big Bang. The molecule gained significant attention following its first circumstellar detection in the young and dense planetary nebula NGC 7027. We target some hydride ions associated with the noble gases (HeH${}^{+}$, ArH${}^{+}$, and NeH${}^{+}$) to investigate their formation in harsh environments like the nova outburst region. We use a photoionization modeling (based on previously published best-fit physical parameters) of the moderately fast ONe type nova, QU Vulpeculae 1984, and the CO type novae, RS Ophiuchi and V1716 Scorpii. Our steady-state modeling reveals a convincing amount of HeH${}^{+}$, especially in the dense clump of RS Ophiuchi and V1716 Scorpii. The calculated upper limit on the surface brightness of HeH${}^{+}$ transitions suggests that the James Webb Space Telescope (JWST) could detect some of them, particularly in sources like RS Ophiuchi and V1716 Scorpii, which have similar physical and chemical conditions and evolution. It must be clearly noted that the sources studied are used as templates, and not as targets for observations. The detection of these lines could be useful for determining the physical conditions in similar types of systems and for validating our predictions based on new electron-impact ro-vibrational collisional data at temperatures of up to 20,000 K.

arXiv comment15 pages, 12 figures, published in Astronomy & Astrophysics (A&A) Journal

References in corpus (35)

• The UMIST database for astrochemistry 2012
• The Near-Infrared Spectrograph (NIRSpec) on the James Webb Space Telescope I. Overview of the instrument and its capabilities
• The ExoMol database: molecular line lists for exoplanet and other hot atmospheres
• Comprehensive Photometric Histories of All Known Galactic Recurrent Novae
• H3+ in Diffuse Interstellar Clouds: a Tracer for the Cosmic-Ray Ionization Rate
• JWST MIRI flight performance: The Medium-Resolution Spectrometer
• First astrophysical detection of the helium hydride ion (HeH${}^{+}$)
• Detection of a Noble Gas Molecular Ion, {36}ArH^+, in the Crab Nebula
• X-Ray Emitting Blast Wave from the Recurrent Nova RS Ophiuchi
• Ubiquitous argonium (ArH${}^{+}$) in the diffuse interstellar medium -- a molecular tracer of almost purely atomic gas
• Molecular Hydrogen in Star-forming regions: implementation of its micro-physics in Cloudy
• Binary orbits as the driver of gamma-ray emission and mass ejection in classical novae
• Carbon-Oxygen Classical Novae are Galactic ${}^7$Li Producers as well as Potential Supernova Ia Progenitors
• Spectroscopic orbits and variations of RS Oph
• Shocks in nova outflows. I. Thermal emission
• The environments of z<0.3 QSOs
• Comprehensive Catalogue of the Overall Best Distances and Properties of 402 Galactic Novae
• Radiative shocks create environments for dust formation in novae
• The chemistry of interstellar argonium and other probes of the molecular fraction in diffuse clouds
• State-to-state chemistry and rotational excitation of CH${}^{+}$ in photon-dominated regions
• Light Curve Analysis of Neon Novae
• Electron-impact excitation of diatomic hydride cations I: HeH${}^{+}$, CH${}^{+}$, ArH${}^{+}$
• Photodissociation of interstellar ArH+
• The Massive CO White Dwarf in the Symbiotic Recurrent Nova RS Ophiuchi
• Detection of vibrational emissions from the helium hydride ion (HeH${}^{+}$) in the planetary nebula NGC 7027
• ArH2+ and NeH2+ as Global Minima in the Ar+/Ne+ + H2 Reactions: Energetic, Spectroscopic, and Structural Data
• The Temporal Development of Dust Formation and Destruction in Nova Sagittarii 2015#2 (V5668 Sgr): A Panchromatic Study
• Detection and evolution of the CO (v = 2) emission in nova V2615 Ophiuchi (2007)
• Modelling the ArH${}^{+}$ emission from the Crab Nebula
• Photo-Ionization Induced Rapid Grain Growth in Novae
• Study of 2021 outburst of the recurrent nova RS Ophiuchi: Photoionization and morpho-kinematic modelling
• Spectroscopic diagnostics of dust formation and evolution in classical nova ejecta
• Inelastic low-energy collisions of electrons with HeH${}^{+}$: rovibrational excitation and dissociative recombination
• Exploring the Possibility of Identifying Hydride and Hydroxyl Cations of Noble Gas Species in the Crab Nebula Filament
• Optical and near-infrared spectroscopy of Nova V2891 Cygni: evidence for shock-induced dust formation

Cited by in corpus (2)

• Chemistry and ro-vibrational excitation of HeH${}^{+}$ in the Planetary Nebula NGC 7027
• Metallic species in interstellar medium: Astrochemical modeling