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; 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 Núñez; 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

doi:10.3847/psj/abedad

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arXiv · 2010.12739

Venus Observations at 40 and 90 GHz with CLASS

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Abstract

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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Sumit Dahal, Michael K. Brewer, John W. Appel, Aamir Ali, Charles L. Bennett, Ricardo Bustos, Manwei Chan, David T. Chuss, 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 Núñez, 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. 2020-10-24. Venus Observations at 40 and 90 GHz with CLASS. https://doi.org/10.3847/psj%2Fabedad

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