Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Interstellar cyanomethane.

B E Turner1, P Friberg, W M Irvine

  • 1National Radio Astronomy Observatory, USA.

The Astrophysical Journal
|June 1, 1990
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Ambient temperature and solar insolation are associated with decreased prevalence of SSRI-treated psychiatric disorders.

Journal of psychiatric research·2018
Same author

Heart rate variability characteristics of patients with irritable bowel syndrome and associations with symptoms.

Neurogastroenterology and motility·2018
Same author

Autonomic nervous system function predicts the inflammatory response over three years in newly diagnosed ulcerative colitis patients.

Neurogastroenterology and motility·2016
Same author

A controlled study of lifestyle treatment in primary care for children with obesity.

Pediatric obesity·2012
Same author

Two-year outcome of laparoscopic Roux-en-Y gastric bypass in adolescents with severe obesity: results from a Swedish Nationwide Study (AMOS).

International journal of obesity (2005)·2012
Same author

From the Swedish to the Mediterranean diet and the omega-6/omega-3 balance.

World review of nutrition and dietetics·2011
Same journal

The Progenitor Systems of Classical Novae in M31.

The Astrophysical journal·2025
Same journal

The Impact of Extended CO<sub>2</sub> Cross Sections on Temperate Anoxic Planet Atmospheres.

The Astrophysical journal·2025
Same journal

Topological Approach to Void Finding Applied to the SDSS Galaxy Map.

The Astrophysical journal·2025
Same journal

New Ritz Wavelengths and Transition Probabilities of Parity-forbidden [Mn II] Lines of Astrophysical Interest.

The Astrophysical journal·2024
Same journal

Abundances of Neutron-capture Elements in 62 Stars in the Globular Cluster Messier 15.

The Astrophysical journal·2024
Same journal

Quantification of High-dimensional Non-Gaussianities and Its Implication to Fisher Analysis in Cosmology.

The Astrophysical journal·2023
See all related articles

The abundance ratio of cyanomethane radical (CH2CN) to acetonitrile (CH3CN) varies with temperature in interstellar clouds. This ratio, decreasing with higher temperatures, suggests CH2CN forms via reactions involving nitrogen and hydrocarbons.

Area of Science:

  • Astrochemistry
  • Interstellar Medium Chemistry
  • Molecular Spectroscopy

Background:

  • Investigating the formation pathways of interstellar molecules is crucial for understanding chemical evolution in space.
  • Cyanomethane radical (CH2CN) and acetonitrile (CH3CN) are nitrogen-bearing molecules found in interstellar clouds.
  • Previous models have proposed specific chemical reactions and recombination processes for these species.

Purpose of the Study:

  • To study the abundance ratio of CH2CN to CH3CN in different interstellar environments.
  • To elucidate the role of CnHm(+) + N reactions in astrochemistry.
  • To test models of dissociative electron recombination, specifically Bates's models.

Main Methods:

  • Observational study of CH2CN and CH3CN in interstellar sources like TMC-1 and Sgr B2.
Keywords:
NASA Discipline ExobiologyNASA Discipline Number 52-10NASA Program ExobiologyNon-NASA Center

Related Experiment Videos

  • Analysis of abundance ratios in relation to environmental parameters, particularly temperature.
  • Comparison of observed ratios with theoretical predictions for chemical pathways.

    • Main Results:

    • A significantly different CH2CN/CH3CN abundance ratio was observed between TMC-1 and Sgr B2, attributed to temperature differences.
    • The CH2CN/CH3CN ratio shows a monotonic increase as temperature decreases from 10 K to 120 K.
    • Two new detections of CH2CN support the observed trends and temperature dependence.

    Conclusions:

    • The temperature dependence of the CH2CN/CH3CN ratio suggests CH2CN destruction via reaction with oxygen, or different formation pathways.
    • If oxygen destruction is significant, the molecules do not serve as a direct test for Bates's dissociative recombination models.
    • CH2CN likely forms via the C2H4(+) + N reaction, validating its importance in astrochemistry and explaining the observed temperature dependence.