Disk Chemistry
نویسندگان
چکیده
منابع مشابه
Gas and grain chemistry in a protoplanetary disk
The chemistry in a protoplanetary accretion disk is modelled between a radius of 100 and 0.1 AU of the central object. We find that interaction of the gas with the dust grains is very important, both by removing a large fraction of the material from the gas in the outer regions and through the chemical reactions which can occur on the dust grain surfaces. In addition, collision with grains neut...
متن کاملAxi-symmetric models of ultraviolet radiative transfer with applications to circumstellar disk chemistry
A new two-dimensional axi-symmetric ultraviolet radiative transfer code is presented, which is used to calculate photodissociation and ionization rates for use in chemistry models of flaring circumstellar disks. Scattering and absorption of photons from the central star and from the interstellar radiation field are taken into account. The molecules are effectively photodissociated in the surfac...
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We present Submillimeter Array observations of several deuterated species in the disk around the classical T Tauri star TW Hydrae at arcsecond scales, including detections of the DCN J 1⁄4 3Y2 and DCO J 1⁄4 3Y2 lines and upper limits to the HDO 31;2Y22;1, ortho-H2D 11;0Y11;1, and para-D2H 11;0Y10;1 transitions. We also present observations of the HCN J 1⁄4 3Y2, HCO J 1⁄4 3Y2, and HCO J 1⁄4 4Y3 ...
متن کاملModeling the gas - phase chemistry of the transitional disk around HD 141569 A
Aims. The chemistry, distribution and mass of the gas in the transitional disk around the 5 Myr old B9.5 V star HD 141569A are constrained. Methods. A quasi 2-dimensional (2D) chemistry code for photon dominated regions (PDR) is used to calculate the chemistry and gas temperatures in the disk. The calculations are performed for several gas distributions, PAH abundances and values of the total g...
متن کاملdisk-disk microlensing
We present a new long-duration parallax event from the OGLE-II database, sc5 2859, which has the second longest time-scale ever identified (tE = 547.6 +22.6 −7.8 days). We argue that both the lens and source reside in the Galactic disk, making event sc5 2859 one of the first confirmed examples of so-called disk-disk microlensing. We find that the source star is most probably located at a distan...
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ژورنال
عنوان ژورنال: EPJ Web of Conferences
سال: 2015
ISSN: 2100-014X
DOI: 10.1051/epjconf/201510200012