First detection of C2H+ in the interstellar medium

arXiv:2608.08014 · astro-ph.GA · Submitted 2026-08-08 · Read on arXiv

Arshia M. Jacob, Karl M. Menten, Sandra Brünken, Arnaud Belloche, Friedrich Wyrowski, Weslley G. D. P. Silva, Oskar Asvany, Sarwar Khan, Slawa Kabanovic, Kim Steenbakkers, Gerrit C. Groenenboom, Britta Redlich, Stephan Schlemmer

astro-ph.GA

Submitted: 2026-08-08

Updated: 2026-08-11

Comments: Accepted for publication in Astronomy and Astrophysics (19 pages including 6 page Appendix, 13 figures and 3 tables)

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

Terminology

• Abundance — 45× in this paper · explained in 1 episode
• APEX — 16× in this paper · explained in 1 episode
• Abstraction — 7× in this paper · explained in 1 episode
• Trace — 4× in this paper · explained in 2 episodes
• Accuracy — 2× in this paper · explained in 1 episode
• Core — 2× in this paper · explained in 2 episodes
• Effective Hamiltonian — 1× in this paper · explained in 2 episodes
• Polycyclic aromatic hydrocarbons (PAHs) — 1× in this paper · explained in 2 episodes
• Spectral Signature — 1× in this paper · explained in 2 episodes

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