Zobrazeno 1 - 10
of 117
pro vyhledávání: '"Schlemmer, A"'
Autor:
Zingsheim, Oliver, Bonah, Luis, Lewen, Frank, Thorwirth, Sven, Müller, Holger S. P., Schlemmer, Stephan
A new millimeter- to millimeter-wave double-modulation double-resonance (MMW-MMW DM-DR) scheme has been applied to record spectra of two astronomically relevant complex organic molecules (COMs), propanal (C2H5CHO) and ethyl cyanide (C2H5CN), to demon
Externí odkaz:
http://arxiv.org/abs/2407.01297
Methanol is an abundant molecule in space. The column density of CH$_3^{18}$OH is in some star-forming regions so high that the search for CH$_3^{17}$OH is promising. But only very few transition frequencies of CH$_3^{17}$OH with a microwave accuracy
Externí odkaz:
http://arxiv.org/abs/2407.01139
Autor:
Ilyushin, V. V., Müller, H. S. P., Drozdovskaya, M. N., Jørgensen, J. K., Bauerecker, S., Maul, C., Porohovoi, R., Alekseev, E. A., Dorovskaya, O., Zakharenko, O., Lewen, F., Schlemmer, S., Lees, R. M.
We have started a measurement campaign of numerous methanol isotopologs in low-lying torsional states in order to provide extensive line lists for radio astronomical observations from an adequate spectroscopic model and to investigate how the intrica
Externí odkaz:
http://arxiv.org/abs/2406.08236
Autor:
Bonah, Luis, Schlemmer, Stephan, Guillemin, Jean-Claude, Harding, Michael E., Thorwirth, Sven
Ethyl phosphaethyne, C2H5CP, has been characterized spectroscopically in the gas phase for the first time, employing millimeter- and submillimeter-wave spectroscopy in the frequency regime from 75 to 760 GHz. Spectroscopic detection and analysis was
Externí odkaz:
http://arxiv.org/abs/2406.07127
Publikováno v:
J. Chem. Phys. 160, 071101, 2024
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. Due to the cryogenic temperature of the trap, the hyperfine splittings
Externí odkaz:
http://arxiv.org/abs/2404.05299
Autor:
Deike-Hofmann, Katerina, Dancs, Dorottya, Paech, Daniel, Schlemmer, Heinz-Peter, Maier-Hein, Klaus, Bäumer, Philipp, Radbruch, Alexander, Götz, Michael
Publikováno v:
Investigative Radiology 56(5):p 320-327, May 2021
Materials and methods: First, a dual-time approach was assessed, for which the CNN was provided sequences of the MRI that initially depicted new MM (diagnosis MRI) as well as of a prediagnosis MRI: inclusion of only contrast-enhanced T1-weighted imag
Externí odkaz:
http://arxiv.org/abs/2403.08280
Autor:
Silva, Weslley Guilherme Dias de Paiva, Gupta, Divita, Plaar, Eline, Doménech, José Luis, Schlemmer, Stephan, Asvany, Oskar
The rovibrational spectrum of the molecular ion H$_2$CCCH$^+$ was investigated in a 4~K cryogenic ion trap instrument employing the leak-out spectroscopy method. Transitions within the fundamental $\nu_1$ (C-H stretch) and the combination band $\nu_3
Externí odkaz:
http://arxiv.org/abs/2402.00733
Autor:
Berné, Olivier, Martin-Drumel, Marie-Aline, Schroetter, Ilane, Goicoechea, Javier R., Jacovella, Ugo, Gans, Bérenger, Dartois, Emmanuel, Coudert, Laurent, Bergin, Edwin, Alarcon, Felipe, Cami, Jan, Roueff, Evelyne, Black, John H., Asvany, Oskar, Habart, Emilie, Peeters, Els, Canin, Amelie, Trahin, Boris, Joblin, Christine, Schlemmer, Stephan, Thorwirth, Sven, Cernicharo, Jose, Gerin, Maryvonne, Tielens, Alexander, Zannese, Marion, Abergel, Alain, Bernard-Salas, Jeronimo, Boersma, Christiaan, Bron, Emeric, Chown, Ryan, Cuadrado, Sara, Dicken, Daniel, Elyajouri, Meriem, Fuente, Asunción, Gordon, Karl D., Issa, Lina, Kannavou, Olga, Khan, Baria, Lacinbala, Ozan, Languignon, David, Gal, Romane Le, Maragkoudakis, Alexandros, Meshaka, Raphael, Okada, Yoko, Onaka, Takashi, Pasquini, Sofia, Pound, Marc W., Robberto, Massimo, Röllig, Markus, Schefter, Bethany, Schirmer, Thiébaut, Sidhu, Ameek, Tabone, Benoit, Van De Putte, Dries, Vicente, Sílvia, Wolfire, Mark G.
Publikováno v:
Nature 621, 56-59 (2023)
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 the Solar System. Alternative routes involving processes on grain surfa
Externí odkaz:
http://arxiv.org/abs/2401.03296
Autor:
Schlemmer, Stephan, Plaar, Eline, Gupta, Divita, Silva, Weslley Guilherme Dias de Paiva, Salomon, Thomas, Asvany, Oskar
The antisymmetric C-H stretching vibration $\nu_3$ ($^2\Pi$ $\leftarrow$ $^2\Pi$) of ionized acetylene, C$_2$H$_2^+$, has been revisited using a cryogenic 22-pole ion trap machine. Two action spectroscopic techniques, the novel leak-out spectroscopy
Externí odkaz:
http://arxiv.org/abs/2310.10186
Autor:
Fatima, Mariyam, Müller, Holger S. P., Zingsheim, Oliver, Lewen, Frank, Rivilla, Víctor M., Jiménez-Serra, Izaskun, Martín-Pintado, Jesús, Schlemmer, Stephan
Publikováno v:
A&A 680, A25 (2023)
Isobutene ((CH$_3$)$_2$C=CH$_2$) is one of the four isomers of butene (C$_4$H$_8$). Given the detection of propene (CH$_3$CH=CH$_2$) toward TMC-1, and also in the warmer environment of the solar-type protostellar system IRAS 16293$-$2422, one of the
Externí odkaz:
http://arxiv.org/abs/2309.17236