SURFRESIDE: a novel experiment to study surface chemistry under interstellar and protostellar conditions

نویسندگان

  • H. J. Fraser
  • E. F. van Dishoeck
چکیده

To explain the existence and observations of prebiotic molecules in interstellar and protostellar environments, it is first necessary to evaluate the chemical and physical processes that govern the generation, behavior, and destruction of precursor molecules, from which complex prebiotic species are probably formed. In interstellar and protostellar environments, many of these precursor species, such as CO2, HCOOH and CH3OH, are thought to form via chemical reactions on or in icy grains, either by thermal, UV or electron induced processes. To date the surface processes remain largely unstudied, theoretically or experimentally. In this paper we present details of a new surface astrochemistry experiment that has been designed to study the thermally induced physical and chemical behavior of interstellar ice analogues. The first results from this experiment are presented, illustrating the physical behavior of CO and CH3OH during thermal processing. 2003 COSPAR. Published by Elsevier Ltd. All rights reserved.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

SURFRESIDE(2): an ultrahigh vacuum system for the investigation of surface reaction routes of interstellar interest.

A new ultrahigh vacuum experiment is described to study atom and radical addition reactions in interstellar ice analogues for astronomically relevant temperatures. The new setup - SURFace REaction SImulation DEvice (SURFRESIDE(2)) - allows a systematic investigation of solid state pathways resulting in the formation of molecules of astrophysical interest. The implementation of a double beam lin...

متن کامل

Application of a Novel Nanocomposite for Desulfurization of a Typical Organo Sulfur Compound

In this research, zeolite-TiO2 nanocomposite was prepared for degradation of dibenzothiophene as a typical aromatic organosulfur compound of transportation fuels.The synthesized TiO2 was immobilized on the surface of clinoptilolite by Solid State Dispersion (SSD) method. The nanocomposite was then characterized by XRD, FTIR, TEM and SEM techniques. Photodegradation of ...

متن کامل

A novel and eco-friendly o-phenylendiamine stabilized on silica-coated magnetic nanocatalyst for the synthesis of indenoquinoline derivatives under ultrasonic-assisted solvent-free conditions

In this study, a novel and environmentally benign o-phenylendiamine stabilized on silica-coated Fe3O4 magnetic nanocatalyst (Fe3O4@SiO2@propyltriethoxysilane@o-phenylendiamine-SO3H/HCl) as a hybrid magnetic organometallic nanocatalyst has been synthesized. After that, the structure of this new catalyst was compl...

متن کامل

Laboratory H2O:CO2 ice desorption data: entrapment dependencies and its parameterization with an extended three-phase model

Context. Ice desorption affects the evolution of the gas-phase chemistry during the protostellar stage, and also determines the chemical composition of comets forming in circumstellar disks. From observations, most volatile species are found in H2O-dominated ices. Aims. The aim of this study is first to experimentally determine how entrapment of volatiles in H2O ice depends on ice thickness, mi...

متن کامل

Removal of Chromate from Aqueous Solution by a Novel Clinoptilolite-Polyanillin Composite

Unmodified zeolites show little affinity for anions due to the fact that their surfaces are negatively charged. However modification of zeolites with amines turns their negative surface charge to positive and creating higher adsorption capacity for anions. In this study, polyaniline-clinoptilolite composite was prepared by polymerization of anilinium on the surface of zeolite. The composite...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2004