The chemistry of the interstellar medium occurs under extreme conditions and can lead to
the formation of exotic molecules. These are species that on Earth are unstable and/or …

Context. Detailed astrochemical models are a key component to interpret the observations of
interstellar and circumstellar molecules since they allow important physical properties of the …

We report the first identification in space of HC 3 N+, the simplest member of the family of
cyanopolyyne cations. Three rotational transitions with half-integer quantum numbers from …

The resonance-stabilization of the propargyl radical (C3H3) makes it among the most
important reactive intermediates in extreme environments and grants it a long enough …

The carbon-rich molecular ions C 3 H+ and HC 3 O+ have been studied for the first time at
high spectral resolution in the 5 μ m wavelength regime employing leak-out spectroscopy of …

Infrared dark clouds (IRDCs) are fruitful objects to study the fragmentation of interstellar
filaments and initial conditions and early stages of high-mass (M> 8 M⊙) star formation. We …

We present the discovery with the QUIJOTE line survey of the cations HC 5 N+ and HC 7 N+
in the direction of TMC-1. Seven lines with half-integer quantum numbers from J= 25/2–23/2 …

We present the first detection in space of 1, 4-pentadiyne. It has been found towards TMC-1
with the QUIJOTE line survey in the 31–50 GHz range. We observed a total of 17 transitions …

We report the discovery in TMC-1 of two cyano derivatives of the PAH acenaphthylene (C 12
H 8). We have found two series of lines with the QUIJOTE line survey that we assign to 1-C …

Individual fingerprints of different isomers of C3H3+ cations have been identified by studying
photoionization, photoexcitation, and photofragmentation of C3H3+ near the carbon K-edge …