Trumbo, Samantha K. and Brown, Michael E. and Butler, Bryan J. (2017) ALMA Thermal Observations of a Proposed Plume Source Region on Europa. Astronomical Journal, 154 (4). Art. No. 148. ISSN 1538-3881. doi:10.3847/1538-3881/aa8769. https://resolver.caltech.edu/CaltechAUTHORS:20170915-113412431
![]() |
PDF
- Published Version
See Usage Policy. 824kB |
![]() |
PDF
- Submitted Version
See Usage Policy. 1MB |
Use this Persistent URL to link to this item: https://resolver.caltech.edu/CaltechAUTHORS:20170915-113412431
Abstract
We present a daytime thermal image of Europa taken with the Atacama Large Millimeter Array. The imaged region includes the area northwest of Pwyll Crater, which is associated with a nighttime thermal excess seen by the Galileo Photopolarimeter Radiometer and with two potential plume detections. We develop a global thermal model of Europa and simulate both the daytime and nighttime thermal emission to determine if the nighttime thermal anomaly is caused by excess endogenic heat flow, as might be expected from a plume source region. We find that the nighttime and daytime brightness temperatures near Pwyll Crater cannot be matched by including excess heat flow at that location. Rather, we can successfully model both measurements by increasing the local thermal inertia of the surface.
Item Type: | Article | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Related URLs: |
| ||||||||||||
ORCID: |
| ||||||||||||
Additional Information: | © 2017 American Astronomical Society. Received 2017 July 12; revised 2017 August 11; accepted 2017 August 17; published 2017 September 15. This paper makes use of the following ALMA data: ADS/JAO.ALMA#2015.1.01302.S. ALMA is a partnership of ESO (representing its member states), NSF (USA) and NINS (Japan), together with NRC (Canada), MOST and ASIAA (Taiwan), and KASI (Republic of Korea), in cooperation with the Republic of Chile. The Joint ALMA Observatory is operated by ESO, AUI/NRAO, and NAOJ. The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc. This research was supported by grant 1313461 from the National Science Foundation. The authors thank John R. Spencer for kindly providing the Galileo PPR data used within this paper. | ||||||||||||
Group: | Astronomy Department | ||||||||||||
Funders: |
| ||||||||||||
Subject Keywords: | planets and satellites: general; planets and satellites: individual (Europa) ; planets and satellites: surfaces | ||||||||||||
Issue or Number: | 4 | ||||||||||||
DOI: | 10.3847/1538-3881/aa8769 | ||||||||||||
Record Number: | CaltechAUTHORS:20170915-113412431 | ||||||||||||
Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20170915-113412431 | ||||||||||||
Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||||||||||
ID Code: | 81487 | ||||||||||||
Collection: | CaltechAUTHORS | ||||||||||||
Deposited By: | Tony Diaz | ||||||||||||
Deposited On: | 15 Sep 2017 18:39 | ||||||||||||
Last Modified: | 15 Nov 2021 19:43 |
Repository Staff Only: item control page