90 citations · 437 across the 15 of their papers we have counts for
15 papers
Spectroscopic Detection and Characterization of Cyanooxomethylium, NCCO
Marcel Bast, Julian Böing, Thomas Salomon +6
Cyanooxomethylium, NCCO, a fundamental linear acylium ion, has been observed spectroscopically for the first time using action spectroscopy in ion trap apparatuses. A first low…
PDRs4All XV: CH radical and H molecular ion in the irradiated protoplanetary disk d203-506
I. Schroetter, O. Berné, J. R. Goicoechea +20
Most protoplanetary disks experience a phase in which they are subjected to strong ultraviolet radiation from nearby massive stars. This UV radiation can substantially alter their…
Hyperfine-Resolved Rotational Spectroscopy of HCNH+
Weslley G. D. P. Silva, Luis Bonah, Philipp C. Schmid +2
The rotational spectrum of the molecular ion HCNH+ is revisited using double-resonance spectroscopy in an ion trap apparatus, with six transitions measured between 74 and 445 GHz.…
High Resolution Rovibrational and Rotational Spectroscopy of HCCCH
Weslley Guilherme Dias de Paiva Silva, Divita Gupta, Eline Plaar +3
The rovibrational spectrum of the molecular ion HCCCH was investigated in a 4~K cryogenic ion trap instrument employing the leak-out spectroscopy method. Transitions within…
Formation of the Methyl Cation by Photochemistry in a Protoplanetary Disk
Olivier Berné, Marie-Aline Martin-Drumel, Ilane Schroetter +53
Forty years ago it was proposed that gas phase organic chemistry in the interstellar medium was initiated by the methyl cation CH3+, but hitherto it has not been observed outside t…
High-resolution spectroscopy of the antisymmetric C-H stretch of CH using leak-out action spectroscopy
Stephan Schlemmer, Eline Plaar, Divita Gupta +3
The antisymmetric C-H stretching vibration ( ) of ionized acetylene, CH, has been revisited using a cryogenic 22-pole ion trap machine. Two a…
Discovery of HCCCH in TMC-1
W. G. D. P. Silva, J. Cernicharo, S. Schlemmer +13
Based on a novel laboratory method, 14 mm-wave lines of the molecular ion HCCCH have been measured in high resolution, and the spectroscopic constants of this asymmetric ro…
Leak-out Spectroscopy, a universal method of action spectroscopy in cold ion traps
Philipp C. Schmid, Oskar Asvany, Thomas Salomon +2
A novel method of spectroscopy in ion traps termed leak-out spectroscopy (LOS) is presented. Here, mass selected, cold ions are excited by an infrared laser. In a subsequent collis…
High-resolution infrared action spectroscopy of the fundamental vibrational band of CN+
Jose L. Domenech, Oskar Asvany, Charles R. Markus +2
Rotational-vibrational transitions of the fundamental vibrational modes of the CN and CN cations have been observed for the first time using a c…
Descendant of the X-ogen carrier and a "mass of 69": Infrared action spectroscopic detection of HCO and HCS
S. Thorwirth, M. E. Harding, O. Asvany +6
The carbon chain ions HCO and HCS - longer variants of the famous "X-ogen" line carrier HCO - have been observed for the first time using two cryogenic 22-pole…
Accurate rotational rest frequencies for ammonium ion isotopologues
José-Luis Doménech, Stephan Schlemmer, Oskar asvany
We report rest frequencies for rotational transitions of the deuterated ammonium isotopologues NH3D+, NH2D2+ and NHD3+, measured in a cryogenic ion trap machine. For the symmetric…
First laboratory detection of vibration-rotation transitions of CH and CH and improved measurement of their rotational transition frequencies
José L. Doménech, Pavol Jusko, Stephan Schlemmer +1
The long-searched C-H stretches of the fundamental ions CH and CH have been observed for the first time in the laboratory. For this, the state-dependent attachment o…
Accurate frequency determination of vibration-rotation and rotational transitions of SiH+
José L. Doménech, Stephan Schlemmer, Oskar Asvany
The fundamental 28SiH+ ion has been characterized in a collaborative work, utilizing a hollow-cathode-discharge laser-spectrometer and a cryogenic ion trap spectrometer. Twenty-thr…
Detection of interstellar ortho-D2H+ with SOFIA
Jorma Harju, Olli Sipilä, Sandra Brünken +9
We report on the detection of the ground-state rotational line of ortho-D2H+ at 1.477 THz (203 micron) using the German REceiver for Astronomy at Terahertz frequencies (GREAT) onbo…
Modelling line emission of deuterated H_3^+ from prestellar cores
O. Sipilä, E. Hugo, J. Harju +3
Context: The depletion of heavy elements in cold cores of interstellar molecular clouds can lead to a situation where deuterated forms of H_3^+ are the most useful spectroscopic pr…