Venus Observations at 40 and 90 GHz with CLASS

Aamir Ali; Carolina N\'u\~nez; Charles L. Bennett; David T. Chuss; Deniz A. N. Valle; Dominik Gothe; Duncan J. Watts; Edward J. Wollack; Francisco Espinoza; Gary Rhoades

arxiv: 2010.12739 · v2 · pith:7VDLXRGCnew · submitted 2020-10-24 · 🌌 astro-ph.EP · astro-ph.IM

Venus Observations at 40 and 90 GHz with CLASS

Sumit Dahal , Michael K. Brewer , John W. Appel , Aamir Ali , Charles L. Bennett , Ricardo Bustos , Manwei Chan , David T. Chuss

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Joseph Cleary Jullianna D. Couto Rahul Datta Kevin L. Denis Joseph Eimer Francisco Espinoza Thomas Essinger-Hileman Dominik Gothe Kathleen Harrington Jeffrey Iuliano John Karakla Tobias A. Marriage Sasha Novack Carolina N\'u\~nez Ivan L. Padilla Lucas Parker Matthew A. Petroff Rodrigo Reeves Gary Rhoades Karwan Rostem Deniz A. N. Valle Duncan J. Watts Janet L. Weiland Edward J. Wollack Zhilei Xu

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keywords bandsfrequencymeasurementstemperaturevenusabsoluteabsorbersadditional

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Using the Cosmology Large Angular Scale Surveyor, we measure the disk-averaged absolute Venus brightness temperature to be 432.3 $\pm$ 2.8 K and 355.6 $\pm$ 1.3 K in the Q and W frequency bands centered at 38.8 and 93.7 GHz, respectively. At both frequency bands, these are the most precise measurements to date. Furthermore, we observe no phase dependence of the measured temperature in either band. Our measurements are consistent with a CO$_2$-dominant atmospheric model that includes trace amounts of additional absorbers like SO$_2$ and H$_2$SO$_4$.

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Venus Observations at 40 and 90 GHz with CLASS

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