Search Publications
Source locations of narrowband radio emissions detected at Saturn
Gurnett, D. A.; Hospodarsky, G. B.; Kurth, W. S. +7 more
Since Cassini's arrival at Saturn in 2004, the Radio and Plasma Wave Science instrument has detected numerous narrowband (NB) radio emission events. These emissions, mostly detected around 5 and 20 kHz, usually occur periodically for several days after intensifications of Saturn kilometric radiation. We present calculations based on an electron de…
Serendipitous Discovery of an Overdensity of Lyα Emitters at z ~ 4.8 in the CL1604 Supercluster Field
Kocevski, D.; Sawicki, M.; Fassnacht, C. D. +6 more
We present results of a spectroscopic search for Lyα emitters (LAEs) in the Cl1604 supercluster field using the extensive spectroscopic Keck/DEep Imaging Multi-Object Spectrograph database taken as part of the Observations of Redshift Evolution in Large-Scale Environments survey. A total of 12 slitmasks were observed and inspected in the Cl1604 fi…
The Nature of Dusty Starburst Galaxies in a Rich Cluster at z = 0.4: The Progenitors of Lenticulars?
Treu, Tommaso; Smail, Ian; Ellis, Richard S. +2 more
We present the results of a Spitzer Infrared Spectrograph survey of 24 µm selected luminous infrared galaxies (LIRGs, L IR > 1011 L sun) in the rich cluster Cl 0024+16 at z = 0.4. Optically, these LIRGs resemble unremarkable spiral galaxies with e(a)/e(c) spectral classifications and [O II]-derived star fo…
Altair - the ``hottest'' magnetically active star in X-rays
Schmitt, J. H. M. M.; Robrade, J.
Context: The onset of stellar magnetic activity is related to the operation of dynamo processes that require the development of an outer convective layer. This transition of stellar interior structure is expected to occur in late A-type stars.
Aims: The A7 star Altair is one of the hottest magnetically active stars. Its proximity to the Sun al…
Calibration and Performance of the AKARI Far-Infrared Surveyor (FIS) -- Slow-Scan Observation Mode for Point-Sources
Nakagawa, Takao; Shirahata, Mai; Hasegawa, Sunao +11 more
We present the characterization and calibration of the Slow-Scan observation mode of the Far-Infrared Surveyor (FIS) onboard the AKARI satellite. The FIS, one of the two focal-plane instruments on AKARI, has four photometric bands between 50--180µm with two types of Ge:Ga array detectors. In addition to the All-Sky Survey, FIS has also taken…
Emission-Line Galaxies from the Hubble Space Telescope Probing Evolution and Reionization Spectroscopically (PEARS) Grism Survey. I. The South Fields
Hathi, Nimish P.; Gardner, Jonathan P.; Meurer, Gerhardt R. +14 more
We present results of a search for emission-line galaxies (ELGs) in the southern fields of the Hubble Space Telescope Probing Evolution And Reionization Spectroscopically (PEARS) grism survey. The PEARS South Fields consist of five Advanced Camera for Surveys pointings (including the Hubble Ultra Deep Field) with the G800L grism for a total of 120…
Spatial structures of magnetic depression in the Earth's high-altitude cusp: Cluster multipoint observations
Zhang, H.; Zong, Q. -G.; Lucek, E. +11 more
Magnetic depression structures (magnetic holes) of short time duration from seconds to minutes have been studied using Cluster data in the high-latitude cusp. Our multispacecraft analysis revealed that the magnetic depressions are spatial structures traveling across the spacecraft, and this result was further strengthened by the calculation of the…
High-Resolution Mid-Infrared Spectroscopy of NGC 7538 IRS 1: Probing Chemistry in a Massive Young Stellar Object
van Dishoeck, Ewine F.; Evans, Neal J., II; Lacy, John H. +2 more
We present high-resolution (R = 75,000-100,000) mid-infrared spectra of the high-mass embedded young star IRS 1 in the NGC 7538 star-forming region. Absorption lines from many rotational states of C2H2, 13C12CH2, CH3, CH4, NH3, HCN, HNCO, and CS are seen. The g…
Near-IR oxygen nightglow observed by VIRTIS in the Venus upper atmosphere
Drossart, P.; Piccioni, G.; García Muñoz, A. +5 more
We present observations of both the (0-0) and (0-1) bands at 1.27 and 1.58 µm of the O2(a1Δg - X3Σg -) nightglow made with the Visible and Infrared Thermal Imaging Spectrometer (VIRTIS) instrument aboard Venus Express. The observations were conducted in both nadir and limb vie…
Ionization processes in the atmosphere of Titan. I. Ionization in the whole atmosphere
Gronoff, G.; Lilensten, J.; Desorgher, L. +1 more
Context: The Cassini probe regularly passes in the vicinity of Titan, revealing new insights into particle precipitation thanks to the electron and proton spectrometer. Moreover, the Huygens probe has revealed an ionized layer at 65~km induced by cosmic rays. The impact of these different particles on the chemistry of Titan is probably very strong…