Science Archives Publication System

CH₄ mixing ratios at microbar pressure levels of Jupiter as constrained by 3-micron ISO data

DOI: 10.1016/j.icarus.2014.04.023 Bibcode: 2014Icar..237...42K

Moses, J. I.; Sim, C. K.; Kim, Sang J. +1 more

Infrared Space Observatory (ISO) data of Jupiter are revisited in order to derive CH₄ mixing ratios at microbar pressures in the atmosphere. We utilize the most updated radiative transfer programs to construct a 3-µm emission model of CH₄ to be compared with the ISO data. From the model-data comparisons, we derive the h…

2014 • Icarus

ISO 15

Saturn’s F Ring core: Calm in the midst of chaos

DOI: 10.1016/j.icarus.2013.12.027 Bibcode: 2014Icar..232..157C

Scargle, J. D.; Showalter, M. R.; Colwell, J. E. +5 more

The long-term stability of the narrow F Ring core has been hard to understand. Instead of acting as “shepherds”, Prometheus and Pandora together stir the vast preponderance of the region into a chaotic state, consistent with the orbits of newly discovered objects like S/2004 S 6. We show how a comb of very narrow radial locations of high stability…

2014 • Icarus

Cassini 15

Circumnuclear Molecular Gas in Megamaser Disk Galaxies NGC 4388 and NGC 1194

DOI: 10.1088/0004-637X/788/2/145 Bibcode: 2014ApJ...788..145G

Greene, Jenny E.; van de Ven, Glenn; Seth, Anil +3 more

We explore the warm molecular and ionized gas in the centers of two megamaser disk galaxies using K-band spectroscopy. Our ultimate goal is to determine how gas is funneled onto the accretion disk, here traced by megamaser spots on sub-parsec scales. We present NIR IFU data with a resolution of ~50 pc for two galaxies: NGC 4388 with VLT/SINFONI an…

2014 • The Astrophysical Journal

eHST 15

A model of the magnetosheath magnetic field during magnetic clouds

DOI: 10.5194/angeo-32-157-2014 Bibcode: 2014AnGeo..32..157T

Kilpua, E. K. J.; Turc, L.; Fontaine, D. +1 more

Magnetic clouds (MCs) are huge interplanetary structures which originate from the Sun and have a paramount importance in driving magnetospheric storms. Before reaching the magnetosphere, MCs interact with the Earth's bow shock. This may alter their structure and therefore modify their expected geoeffectivity. We develop a simple 3-D model of the m…

2014 • Annales Geophysicae

Cluster 15

ALMA Observations of the Host Galaxy of GRB 090423 at z = 8.23: Deep Limits on Obscured Star Formation 630 Million Years after the Big Bang

DOI: 10.1088/0004-637X/796/2/96 Bibcode: 2014ApJ...796...96B

Berger, E.; Chary, R. -R.; Chornock, R. +7 more

We present rest-frame far-infrared (FIR) and optical observations of the host galaxy of GRB 090423 at z = 8.23 from the Atacama Large Millimeter Array (ALMA) and the Spitzer Space Telescope, respectively. The host remains undetected to 3σ limits of F _ν(222 GHz) <~ 33 µJy and F _ν(3.6 µm) <~ 81 nJy. The FIR li…

2014 • The Astrophysical Journal

eHST 15

Massive stars in the giant molecular cloud G23.3-0.3 and W41

DOI: 10.1051/0004-6361/201322822 Bibcode: 2014A&A...569A..20M

Menten, Karl M.; Rich, R. Michael; MacKenty, John W. +7 more

Context. Young massive stars and stellar clusters continuously form in the Galactic disk, generating new Hii regions within their natal giant molecular clouds and subsequently enriching the interstellar medium via their winds and supernovae.
Aims: Massive stars are among the brightest infrared stars in such regions; their identification permi…

2014 • Astronomy and Astrophysics

eHST 15

The Quest to Understand Supergranulation and Large-Scale Convection in the Sun

DOI: 10.1007/s11207-014-0471-4 Bibcode: 2014SoPh..289.3403H

Hanasoge, Shravan M.; Sreenivasan, Katepalli R.

Surface granulation of the Sun is primarily a consequence of thermal transport in the outer 1 % of the radius. Its typical scale of about 1 - 2 Mm is set by the balance between convection, free-streaming radiation, and the strong density stratification in the surface layers. The physics of granulation is well understood, as demonstrated by the clo…

2014 • Solar Physics

SOHO 15

UV spectral analysis of very hot H-deficient [WCE]-type central stars of planetary nebulae: NGC 2867, NGC 5189, NGC 6905, Pb 6 and Sand 3

DOI: 10.1093/mnras/stu878 Bibcode: 2014MNRAS.442.1379K

Bianchi, Luciana; Keller, Graziela R.; Maciel, Walter J.

We analysed ultraviolet Far Ultraviolet Spectroscopic Explorer, International Ultraviolet Explorer, and Hubble Space Telescope/Space Telescope Imaging Spectrograph spectra of five of the hottest [WCE]-type central stars of planetary nebulae: NGC 2867, NGC 5189, NGC 6905, Pb 6, and Sand 3. The analysis leveraged on our grid of cmfgen synthetic spec…

2014 • Monthly Notices of the Royal Astronomical Society

IUE eHST 15

Proper motions for HST observations in three off-axis bulge fields

DOI: 10.1051/0004-6361/201117339 Bibcode: 2014A&A...562A..41S

Rich, R. M.; Soto, M.; Kuijken, K. +3 more

Aims: This is the second in a series of papers that attempt to unveil the kinematic structure of the Galactic bulge through studying radial velocities and proper motions. We report here ~15 000 new proper motions for three low foreground-extinction off-axis fields of the Galactic bulge.
Methods: Proper motions were derived from a combina…

2014 • Astronomy and Astrophysics

eHST 15

Interesting Features in the Combined GALEX and Sloan Color Diagrams of Solar-like Galactic Populations

DOI: 10.1088/0004-6256/147/6/159 Bibcode: 2014AJ....147..159S

Smith, Myron A.; Bianchi, Luciana; Shiao, Bernard

We report on intriguing photometric properties of Galactic stars observed in the Galaxy Evolution Explorer (GALEX) satellite's far-UV (FUV) and near-UV (NUV) bandpasses, as well as from the ground-based Sloan Digital Sky Survey (SDSS) and the Kepler Input Catalog. The first property is that the (FUV - NUV) color distribution of stars in the Kepler…

2014 • The Astronomical Journal

IUE 15