NDLI: Dispersion in Neptune’s zonal wind velocities from NIR Keck AO observations in July 2009

Content Provider	Springer Nature Link
Author	Fitzpatrick, Patrick J. Pater, Imke Luszcz Cook, Statia Wong, Michael H. Hammel, Heidi B.
Copyright Year	2013
Abstract	We report observations of Neptune made in H-(1.4–1.8 μm) and K’-(2.0–2.4 μm) bands on 14 and 16 July 2009 from the 10-m W.M. Keck II Telescope using the near-infrared camera NIRC2 coupled to the Adaptive Optics (AO) system. We track the positions of 54 bright atmospheric features over a few hours to derive their zonal and latitudinal velocities, and perform radiative transfer modeling to measure the cloud-top pressures of 50 features seen simultaneously in both bands.We observe one South Polar Feature (SPF) on 14 July and three SPFs on 16 July at ∼65 °S. The SPFs observed on both nights are different features, consistent with the high variability of Neptune’s storms.There is significant dispersion in Neptune’s zonal wind velocities about the smooth Voyager wind profile fit of Sromovsky et al. (Icarus, 105:140, 1993), much greater than the upper limit we expect from vertical wind shear, with the largest dispersion seen at equatorial and southern mid-latitudes. Comparison of feature pressures vs. residuals in zonal velocity from the smooth Voyager wind profile also directly reveals the dominance of mechanisms over vertical wind shear in causing dispersion in the zonal winds.Vertical wind shear is not the primary cause of the difference in dispersion and deviation in zonal velocities between features tracked in H-band on 14 July and those tracked in K’-band on 16 July. Dispersion in the zonal velocities of features tracked over these short time periods is dominated by one or more mechanisms, other than vertical wind shear, that can cause changes in the dispersion and deviation in the zonal velocities on timescales of hours to days.
Starting Page	65
Ending Page	88
Page Count	24
File Format	PDF
ISSN	0004640X
Journal	Astrophysics and Space Science
Volume Number	350
Issue Number	1
e-ISSN	1572946X
Language	English
Publisher	Springer Netherlands
Publisher Date	2013-12-13
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Infrared: planetary systems Planets and satellites: Neptune: atmospheres Astrophysics and Astroparticles Astronomy, Observations and Techniques Cosmology Extraterrestrial Physics, Space Sciences Astrobiology
Content Type	Text
Resource Type	Article
Subject	Astronomy and Astrophysics Space and Planetary Science

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Neptune’s zonal winds from near-IR Keck adaptive optics imaging in August 2001

Neptune’s zonal winds from near-IR Keck adaptive optics imaging in August 2001

Dispersion in Neptune's Zonal Wind Velocities from NIR Keck AO Observations in July 2009

Radial velocities of stars with multiple co-orbital planets

Dispersion in Neptune’s Zonal Wind Velocities from NIR (2009)

Nuclear fusion in the deuterated cores of inflated hot Jupiters

Nonlinear time-series analysis of Hyperion’s lightcurves

The D/H ratio in the atmospheres of Uranus and Neptune from Herschel-PACS observations

Neptune’s ring arcs: VLT/NACO near-infrared observations and a model to explain their stability

Dispersion in Neptune’s zonal wind velocities from NIR Keck AO observations in July 2009

Similar Documents

Neptune’s zonal winds from near-IR Keck adaptive optics imaging in August 2001

Neptune’s zonal winds from near-IR Keck adaptive optics imaging in August 2001

Dispersion in Neptune's Zonal Wind Velocities from NIR Keck AO Observations in July 2009

Radial velocities of stars with multiple co-orbital planets

Dispersion in Neptune’s Zonal Wind Velocities from NIR (2009)

Nuclear fusion in the deuterated cores of inflated hot Jupiters

Nonlinear time-series analysis of Hyperion’s lightcurves

The D/H ratio in the atmospheres of Uranus and Neptune from Herschel-PACS observations

Neptune’s ring arcs: VLT/NACO near-infrared observations and a model to explain their stability

Dispersion in Neptune’s zonal wind velocities from NIR Keck AO observations in July 2009