308 citations · 2k across the 40 of their papers we have counts for
40 papers
Laboratory and astronomical discovery of the cyanovinyl radical H2CCCN
C. Cabezas, J. Tang, M. Agúndez +9
We report the first laboratory and interstellar detection of the alpha-cyano vinyl radical (H2CCCN). This species was produced in the laboratory by an electric discharge of a gas m…
Discovery of two metallic cyanoacetylides in IRC+10216: HMgCCCN and NaCCCN
C. Cabezas, J. R. Pardo, M. Agundez +6
We report on the detection of a series of six lines in the ultra-deep Q-band integration toward IRC+10216 carried out with the Yebes 40m telescope, which are in harmonic relation w…
Detection of ethanol, acetone, and propanal in TMC-1: New O-bearing complex organics in cold sources
M. Agundez, J. C. Loison, K. M. Hickson +7
We present the detection of ethanol (C2H5OH), acetone (CH3COCH3), and propanal (C2H5CHO) toward the cyanopolyyne peak of TMC-1. These three O-bearing complex organic molecules are…
The chemistry of H2NC in the interstellar medium and the role of the C + NH3 reaction
M. Agundez, O. Roncero, N. Marcelino +3
We carried out an observational search for the recently discovered molecule H2NC, and its more stable isomer H2CN, toward eight cold dense clouds (L1544, L134N, TMC-2, Lupus-1A, L1…
Discovery of CH3CHCO in TMC-1 with the QUIJOTE line survey
R. Fuentetaja, C . Bermúdez, C. Cabezas +9
We report the detection of methyl ketene towards TMC-1 with the QUIJOTE line survey. Nineteen rotational transitions with rotational quantum numbers ranging from J = 3 up to J = 5…
Discovery of interstellar NC4NH+: dicyanopolyynes are indeed abundant in space
M. Agundez, C. Cabezas, N. Marcelino +4
The previous detection of two species related to the non polar molecule cyanogen (NCCN), its protonated form (NCCNH+) and one metastable isomer (CNCN), in cold dense clouds support…
Laboratory rotational spectroscopy and astronomical search of ethynyl substituted naphthalene
Carlos Cabezas, Isabel Peña, José Cernicharo
The recent interstellar detection of cyanonaphthalenes bring interest in related aromatic molecular species that could be present in similar astronomical environments. In this cont…
Laboratory and astronomical discovery of magnesium dicarbide, MgC
P. B. Changala, H. Gupta, J. Cernicharo +6
We report the detection of magnesium dicarbide, MgC, in the laboratory at centimeter wavelengths and assign MgC, MgC, and MgC to 14 unidentifie…
Discovery of two new interstellar molecules with QUIJOTE: HCCCHCCC and HCCCCS
R. Fuentetaja, M. Agúndez, C. Cabezas +5
We report on the discovery of two new molecules, HCCCHCCC and HCCCCS, towards the starless core TMC-1 in the Taurus region from the QUIJOTE line survey in the 31.1-50.2 GHz frequen…
Discovery of fulvenallene in TMC-1 with the QUIJOTE line survey
José Cernicharo, Raúl Fuentetaja, Marcelino Agúndez +6
We report the detection of fulvenallene (-CHCCH) in the direction of TMC-1 with the QUIJOTE line survey. Thirty rotational transitions with =0,1,2,3 and =9-1…
Discovery of five cyano derivatives of propene with the QUIJOTE line survey
José Cernicharo, Raúl Fuentetaja, Carlos Cabezas +5
We report the discovery of five cyano derivatives of propene towards TMC-1 with the QUIJOTE line survey: and -crotononitrile (-CHCHCHCN, -CHCHCHCN), meth…
Discovery of CH2CCHC4H and a rigorous detection of CH2CCHC3N in TMC-1 with the QUIJOTE line survey
R. Fuentetaja, C. Cabezas, M. Agundez +5
Using the QUIJOTE line survey in the 32.0-50.4 GHz range, we report the discovery of the molecule CH2CCHC4H towards the prestellar cold core TMC-1 in the Taurus region. We also pre…
Discovery of the cyclic C5H radical in TMC-1
Carlos Cabezas, Marcelino Agundez, Raul Fuentetaja +6
Cyclic C5H (c-C5H), the radical formed by substituting an ethynyl group CCH for the hydrogen atom in the c-C3H radical, has been detected for the first time in the space. The c-C5H…
A new protonated molecule discovered in TMC-1: HCCNCH+
M. Agundez, C. Cabezas, N. Marcelino +4
In recent years we have seen an important increase in the number of protonated molecules detected in cold dense clouds. Here we report the detection in TMC-1 of HCCNCH+, the proton…
Discovery of a new molecular ion, HC7NH+, in TMC-1
C. Cabezas, M. Agundez, N. Marcelino +4
We report the detection of the protonated form of HC7N in TMC-1. The discovery of the cation HC7NH+ was carried out via the observation of nine harmonically related lines in the Q-…
Discovery of C5H+ and detection of C3H+ in TMC-1 with the QUIJOTE line survey
J. Cernicharo, M. Agundez, C. Cabezas +6
We report the discovery of the C5H+ cation toward TMC-1 with the QUIJOTE line survey. Four lines from J=7-6 up to J=10-9 have been identified in perfect harmonic frequency relation…
Discovery of the elusive thioketenylium, HCCS+, in TMC-1
C. Cabezas, M. Agundez, N. Marcelino +6
We report the detection in TMC-1 of the cation HCCS+ (3Sigma-), which is the protonated form of the widespread radical CCS. This is the first time that a protonated radical has bee…
New deuterated species in TMC-1: Detection of CH2DC4H with the QUIJOTE line survey
C. Cabezas, R. Fuentetaja, E. Roueff +6
We report the first detection in space of the single deuterated isotopologue of methyldiacetylene, CH2DC4H. A total of 12 rotational transitions, with J = 8-12 and Ka = 0 and 1, we…
Detection of the propargyl radical at lambda 3 mm
M. Agundez, N. Marcelino, C. Cabezas +4
We report the detection of the propargyl radical (CH2CCH) in the cold dark cloud TMC-1 in the lambda 3 mm wavelength band. We recently discovered this species in space toward the s…
Discovery of HCCCO and C5O in TMC-1 with the QUIJOTE line survey
J. Cernicharo, M. Agundez, C. Cabezas +5
We report on the detection, for the first time in space, of the radical HCCCO and of pentacarbon monoxide, C5O. The derived column densities are (1.6+/-0.2)e11 cm-2 and (1.5+/-0.2)…
Ultra-deep 31.0-50.3 GHz spectral survey of IRC+10216
J. R. Pardo, J. Cernicharo, B. Tercero +8
Context. IRC+10216, the carbon-rich envelope of the asymptotic giant branch (AGB) star CW Leo, is one of the richest molecular sources in the sky. Available spectral surveys below…
Laboratory observation and astronomical search of 1-cyano propargyl radical, HCCCHCN
C. Cabezas, M. Nakajima, C. H. Chang +3
The reaction between carbon atoms and vinyl cyanide, CH2CHCN, is a formation route to interstellar 3-cyano propargyl radical, CH2C3N, a species that has recently been discovered in…
Discovery of two isomers of ethynyl cyclopentadiene in TMC-1: Abundances of CCH and CN derivatives of hydrocarbon cycles
J. Cernicharo, M. Agundez, R. I. Kaiser +5
We report the detection of two isomers of ethynyl cyclopentadiene (c-C5H5CCH), namely 1- and 2-ethynyl-1,3-cyclopentadiene, in the direction of TMC-1. We derive column densities of…
Discovery of interstellar 3-cyano propargyl radical, CH2CCCN
Carlos Cabezas, Marcelino Agundez, Nuria Marcelino +4
We report the first detection in interstellar space of the 3-cyano propargyl radical (CH2C3N). This species was observed in the cold dark cloud TMC-1 using the Yebes 40m telescope.…