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of 7
pro vyhledávání: '"Akins, Alex B."'
Autor:
Camarca, Maria, de Kleer, Katherine, Butler, Bryan, Akins, Alex B., Thelen, Alexander, de Pater, Imke, Gurwell, Mark A., Moullet, Arielle
Publikováno v:
Planet. Sci. J. 4 142 (2023)
We present a thermal observation of Callisto's leading hemisphere obtained using the Atacama Large Millimeter/submillimeter Array (ALMA) at 0.87 mm (343 GHz). The angular resolution achieved for this observation was $\sim$$0.16^{\prime\prime}$, which
Externí odkaz:
http://arxiv.org/abs/2308.13621
Autor:
Dahal, Sumit, Brewer, Michael K., Akins, Alex B., Appel, John W., Bennett, Charles L., Bustos, Ricardo, Cleary, Joseph, Couto, Jullianna D., Datta, Rahul, Eimer, Joseph, Essinger-Hileman, Thomas, Iuliano, Jeffrey, Li, Yunyang, Marriage, Tobias A., Núñez, Carolina, Petroff, Matthew A., Reeves, Rodrigo, Rostem, Karwan, Shi, Rui, Valle, Deniz A. N., Watts, Duncan J., Weiland, Janet L., Wollack, Edward J., Xu, Zhilei
Publikováno v:
The Planetary Science Journal, 4:154 (7pp), 2023 August
We report on the disk-averaged absolute brightness temperatures of Venus measured at four microwave frequency bands with the Cosmology Large Angular Scale Surveyor (CLASS). We measure temperatures of 432.3 $\pm$ 2.8 K, 355.6 $\pm$ 1.3 K, 317.9 $\pm$
Externí odkaz:
http://arxiv.org/abs/2304.07367
Autor:
Akins, Alex B., Bocanegra-Bahamón, Tatiana M., Wang, Kuo-Nung, Vergados, Panagiotis, Ao, Chi O., Asmar, Sami W., Preston, Robert A.
The EnVision and VERITAS missions to Venus will fly with X and Ka band telecommunications channels which can be used to conduct radio occultation studies of Venus' atmosphere. While link attenuation measurements during prior S and X band occultation
Externí odkaz:
http://arxiv.org/abs/2304.02006
Autor:
Lincowski, Andrew P., Meadows, Victoria S., Crisp, David, Akins, Alex B., Schwieterman, Edward W., Arney, Giada N., Wong, Michael L., Steffes, Paul G., Parenteau, M. Niki, Domagal-Goldman, Shawn
The observation of a 266.94 GHz feature in the Venus spectrum has been attributed to PH$_3$ in the Venus clouds, suggesting unexpected geological, chemical or even biological processes. Since both PH$_3$ and SO$_2$ are spectrally active near 266.94 G
Externí odkaz:
http://arxiv.org/abs/2101.09837
Recently published ALMA observations suggest the presence of 20 ppb PH$_3$ in the upper clouds of Venus. This is an unexpected result, as PH$_3$ does not have a readily apparent source and should be rapidly photochemically destroyed according to our
Externí odkaz:
http://arxiv.org/abs/2101.09831
Autor:
Akins, Alex B., Steffes, Paul G.
Publikováno v:
In Icarus 15 November 2020 351
Autor:
Akins, Alex B., Steffes, Paul G.
Publikováno v:
In Icarus 1 July 2019 326:18-28