Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Theoretical transmission spectra of exoplanet atmospheres with
  hydrocarbon haze: Effect of creation, growth, and settling of haze particles.
  I. Model description and first results   Recently, properties of exoplanet atmospheres have been constrained via
multi-wavelength transit observation, which measures an apparent decrease in
stellar brightness during planetary transit in front of its host star (called
transit depth). Sets of transit depths so far measured at different wavelengths
(called transmission spectra) are somewhat diverse: Some show steep spectral
slope features in the visible, some contain featureless spectra in the
near-infrared, some show distinct features from radiative absorption by gaseous
species. These facts infer the existence of haze in the atmospheres especially
of warm, relatively low-density super-Earths and mini-Neptunes. Previous
studies that addressed theoretical modeling of transmission spectra of
hydrogen-dominated atmospheres with haze used some assumed distribution and
size of haze particles. In this study, we model the atmospheric chemistry,
derive the spatial and size distributions of haze particles by simulating the
creation, growth and settling of hydrocarbon haze particles directly, and
develop transmission spectrum models of UV-irradiated, solar-abundance
atmospheres of close-in warm ($\sim$ 500 K) exoplanets. We find that the haze
is distributed in the atmosphere much more broadly than previously assumed and
consists of particles of various sizes. We also demonstrate that the observed
diversity of transmission spectra can be explained by the difference in the
production rate of haze monomers, which is related to the UV irradiation
intensity from host stars.

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The categories of this paper are: gr-qc
30
The categories of this paper are: q-alg
29
The categories of this paper are: funct-an
20
The categories of this paper are: acc-phys
1
The categories of this paper are: cs
24
The categories of this paper are: dg-ga
26
The categories of this paper are: bayes-an
12
The categories of this paper are: nucl-th
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The categories of this paper are: hep-lat
28
The categories of this paper are: alg-geom
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The categories of this paper are: cond-mat
16
The categories of this paper are: stat
35
The categories of this paper are: mtrl-th
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The categories of this paper are: physics
27
The categories of this paper are: comp-gas
0
The categories of this paper are: hep-ph