A stringent upper limit of the PH$_3$ abundance at the cloud top of Venus.

  title={A stringent upper limit of the PH\$_3\$ abundance at the cloud top of Venus.},
  author={T. Encrenaz and T. Greathouse and E. Marcq and T. Widemann and B. B'ezard and T. Fouchet and R. Giles and H. Sagawa and J. Greaves and C. S. Lesia and Observatoire de Paris and Psl Universit'e and Cnrs and Sorbonne Universit'e and U. Paris and SwRI and LATMOS-IPSL and Uvsq Universit'e Paris-Saclay and Kyoto Sanyo University and S. Physics and Astronomy and C. University and D. O. Earth and Atmospheric and P. Sciences and M. I. O. Technology},
  journal={arXiv: Earth and Planetary Astrophysics},
  • T. Encrenaz, T. Greathouse, +23 authors M. I. O. Technology
  • Published 2020
  • Physics
  • arXiv: Earth and Planetary Astrophysics
  • Following the announcement of the detection of phosphine (PH$_3$) in the cloud deck of Venus at millimeter wavelengths, we have searched for other possible signatures of this molecule in the infrared range. Since 2012, we have been observing Venus in the thermal infrared at various wavelengths to monitor the behavior of SO$_2$ and H$_2$O at the cloud top. We have identified a spectral interval recorded in March 2015 around 950 cm$^{-1}$ where a PH$_3$ transition is present. From the absence… CONTINUE READING
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