Astrochemistry lies at the nexus of astronomy, chemistry, and molecular physics. On the
basis of precise laboratory data, a rich collection of more than 200 familiar and exotic …

Unidentified infrared emission bands are ubiquitous in many astronomical sources. These
bands are widely, if not unanimously, attributed to collective emissions from polycyclic …

Polycyclic aromatic hydrocarbons (PAHs) have long been invoked in the study of interstellar
and protostellar sources, but the unambiguous identification of any individual PAH has …

The observation and synthesis of organic molecules in interstellar space is one of the most
exciting and rapidly growing topics in astrochemistry. Spectroscopic observations especially …

We report the detection of two isomers of ethynyl cyclopentadiene (cC 5 H 5 CCH), namely 1-
and 2-ethynyl-1, 3-cyclopentadiene, in the direction of TMC-1. We derive column densities of …

Using radio observations with the Green Bank Telescope, evidence has now been found for
a second five-membered ring in the dense cloud Taurus Molecular Cloud-1 (TMC-1). Based …

As the inventory of interstellar molecules continues to grow, the gulf between small species,
whose individual rotational lines can be observed with radio telescopes, and large ones …

We have conducted an extensive search for nitrogen-, oxygen-, and sulfur-bearing
heterocycles toward Taurus Molecular Cloud 1 (TMC-1) using the deep, broadband …

We report the detection of large hydrocarbon cycles toward several cold dense clouds. We
observed four sources (L1495B, Lupus-1A, L483, and L1527) in the Q band (31− 50 GHz) …

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 …