522 citations · 6.2k across the 81 of their papers we have counts for
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Water ice: temperature-dependent refractive indexes and their astrophysical implications
W. R. M. Rocha, M. G. Rachid, M. K. McClure +2
Interstellar ices are largely composed of frozen water. It is important to derive fundamental parameters for HO ice such as absorption and scattering opacities for which accura…
The formation of CO through consumption of gas-phase CO on vacuum-UV irradiated water ice
J. Terwisscha van Scheltinga, N. F. W. Ligterink, A. D. Bosman +2
[Abridged] Observations of protoplanetary disks suggest that they are depleted in gas-phase CO. It has been posed that gas-phase CO is chemically consumed and converted into less v…
LIDA - The Leiden Ice Database for Astrochemistry
W. R. M. Rocha, M. G. Rachid, B. Olsthoorn +3
High quality vibrational spectra of solid-phase molecules in ice mixtures and for temperatures of astrophysical relevance are needed to interpret infrared observations toward proto…
Refractive index and extinction coefficient of vapor-deposited water ice in the UV-Vis range
Jiao He, Sharon J. M. Diamant, Siyu Wang +4
Laboratory results of the optical properties of vapor-deposited water ice, specifically the refractive index and extinction coefficient, are available mainly for a selective set of…
Laboratory photo-chemistry of covalently bonded fluorene clusters: observation of an interesting PAH bowl-forming mechanism
Weiwei Zhang, Yubing Si, Junfeng Zhen +3
The fullerene C, one of the largest molecules identified in the interstellar medium (ISM), has been proposed to form top-down through the photo-chemical processing of large…
Laboratory gas-phase infrared spectra of two astronomically relevant PAH cations: diindenoperylene, CH and dicoronylene, CH
Junfeng Zhen, Alessandra Candian, Pablo Castellanos +3
The first gas-phase infrared spectra of two isolated astronomically relevant and large PAH cations - diindenoperylene (DIP) and dicoronylene (DC) - in the 5301800 cm (18.…
Infrared Spectra of Hexa-peri-hexabenzocoronene Cations:HBC+ and HBC2+
Junfeng Zhen, Pablo Castellanos, Jordy Bouwman +2
We present the first infrared (IR) gas phase spectrum of a large and astronomically relevant PAH cation (CH, HBC) and its di-cation (CH,…
Laboratory Photo-chemistry of PAHs: Ionization versus Fragmentation
Junfeng Zhen, Pablo Castellanos, Daniel M. Paardekooper +5
Interstellar polycyclic aromatic hydrocarbons (PAHs) are expected to be strongly processed by vacuum ultraviolet photons. Here, we report experimental studies on the ionization and…
Laboratory formation of fullerenes from PAHs: Top-down interstellar chemistry
Junfeng Zhen, Pablo Castellanos, Daniel M. Paardekooper +2
Interstellar molecules are thought to build up in the shielded environment of molecular clouds or in the envelope of evolved stars. This follows many sequential reaction steps of a…
A coincidence between a hydrocarbon plasma absorption spectrum and the lambda 5450 DIB
H. Linnartz, N. Wehres, H. Van Winckel +5
The aim of this work is to link the broad lambda 5450 diffuse interstellar band (DIB) to a laboratory spectrum recorded through an expanding acetylene plasma. Cavity ring-down dire…
Real-time optical spectroscopy of VUV irradiated pyrene:H_2O interstellar ice
J. Bouwman, D. M. Paardekooper, H. M. Cuppen +2
This paper describes a near-UV/VIS study of a pyrene:H_2O interstellar ice analogue at 10 K using optical absorption spectroscopy. A new experimental approach makes it possible to…