# Workshop on LABORATORY ASTROPHYSICS: Interstellar Gas, Dust and Ice

28-30 September 2016
Tagungstätte Schloss Ringberg, Kreuth
UTC timezone
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# AFTERNOON SESSION - GAS PHASE

## Place

Location: Tagungstätte Schloss Ringberg, Kreuth
Address: Schloss Ringberg, Tagungsstätte der Max-Planck-Gesellschaft, Schlossstrasse 20, 83708 Kreuth
Date: 28 Sep 15:00 - 18:35

## Timetable | Contribution List

Displaying 7 contributions out of 7
Type: Invited Talk Session: AFTERNOON SESSION - GAS PHASE
Track: AFTERNOON SESSION - GAS PHASE
The CRESU $^1$ technique is based on the isentropic expansion of a gas through a Laval Nozzle which acts as a guide and makes the gas velocity streamlines parallel at its exit. This generates a cold supersonic flow which is uniform in temperature and density along several tens of centimetres downstream of the Laval Nozzle. As the cold gas is never in contact with the walls of the experiment, r ... More
Presented by Dr. André CANOSA on 28/9/2016 at 17:15
Type: Contributed Talk Session: AFTERNOON SESSION - GAS PHASE
Track: AFTERNOON SESSION - GAS PHASE
The recombination of deuterated trihydrogen cations $\rm H_3^+$ , $\rm H_2D^+$ , $\rm HD_2^+$ and $\rm D_3^+$ with electrons has been studied in stationary afterglow experiment with decaying plasma in $\rm He/Ar/ H_2 / D_2$ gas mixture. By monitoring the time evolutions of densities of all four cations during an afterglow as a function of $\rm H_2$ and $\rm D_2$ densities, using cavity ring down ... More
Presented by Prof. Juraj GLOSIK on 28/9/2016 at 16:15
Type: Invited Talk Session: AFTERNOON SESSION - GAS PHASE
Track: AFTERNOON SESSION - GAS PHASE
H$_3^+$ was discovered by J.J.Thomson in 1911 [1]. A fundamental exotic molecule, H$_3^+$ intrigued many physicists and chemists. Early studies involving big names such as J. Stark, N. Bohr, A. Dempster, T.R. Hogness, H.D. Smyth, C.A. Coulson, J. Hirschfelder, H. Eyring, G. Herzberg and others are summarized in a recent review [2]. Its abundance in interstellar space was first suggested by 3 plasm ... More
Presented by Prof. Takeshi OKA on 28/9/2016 at 15:15
Type: Invited Talk Session: AFTERNOON SESSION - GAS PHASE
Track: AFTERNOON SESSION - GAS PHASE
Cosmic rays play a vital role in initiating the chemistry that occurs in molecular clouds. The ionization of H and H$_2$ begins a network of ion-molecule reactions responsible for generating many of the diatomic and small polyatomic molecules observed in the interstellar medium. A few such species --- OH$^+$, H$_2$O$^+$, and H$_3^+$ in particular --- are formed and destroyed by rather simple pro ... More
Presented by Dr. Nick INDRIOLO on 28/9/2016 at 15:45
Type: Contributed Talk Session: AFTERNOON SESSION - GAS PHASE
Track: AFTERNOON SESSION - GAS PHASE
Protonated CO$_2$ is a molecule of astrophysical interest because it’s an indirect tracer of carbon dioxide. Being CO$_2$ a main constituent of interstellar ices, its chemistry provides important information on the interplay of gas- and solid-phase chemistry in space. Bogey and coworkers measured in the late 80s the rotational spectra of HOCO$^+$ and DOCO$^+$ up to 420 GHz (1,2). We have e ... More
Presented by Dr. Valerio LATTANZI on 28/9/2016 at 18:15
Type: Contributed Talk Session: AFTERNOON SESSION - GAS PHASE
Track: AFTERNOON SESSION - GAS PHASE
*Detection of new'' species.* There is a great interest in understanding which molecular species containing sulfur might be observed in the ISM. The work along this line concerns the investigation of radicals and ionic species, guided by high accuracy state-of-the-art quantum-chemical computations. Among radicals, we mention HSO. High-resolution measurements of its rotational spectrum have bee ... More
Presented by Prof. CRISTINA PUZZARINI on 28/9/2016 at 17:45
Type: Contributed Talk Session: AFTERNOON SESSION - GAS PHASE
Track: AFTERNOON SESSION - GAS PHASE
At the laboratory astrophysics group in Kassel a new broadband fast sweep spectrometer at MW to submm wavelengths has been setup in order to study transient molecules in a supersonic jet. An arbitrary waveform generator (AWG) is used to generate chirped pulses with a linear frequency sweep in the 100 MHz regime and pulse durations of a few microseconds. These pulses are up-converted to the 20-100 ... More
Presented by Ms. Doris HERBERTH on 28/9/2016 at 18:00
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