Search Publications
Thermal Pressure in Diffuse H2 Gas Measured by Herschel [C II] Emission and FUSE UV H2 Absorption
Goldsmith, P. F.; Langer, W. D.; Pineda, J. L. +1 more
UV absorption studies with the Far Ultraviolet Spectroscopic Explorer (FUSE) satellite have made important observations of H2 molecular gas in Galactic interstellar translucent and diffuse clouds. Observations of the 158 µm [C II] fine-structure line with Herschel trace the same H2 molecular gas in emission. We present …
Calibrating Column Density Tracers with Gamma-Ray Observations of the ρ Ophiuchi Molecular Cloud
Teachey, Alex; Abrahams, Ryan D.; Paglione, Timothy A. D.
Diffuse gamma-ray emission from interstellar clouds results largely from cosmic ray (CR) proton collisions with ambient gas, regardless of the gas state, temperature, or dust properties of the cloud. The interstellar medium is predominantly transparent to both CRs and gamma-rays, so GeV emission is a unique probe of the total gas column density. T…
Long-term Longitudinal Recurrences of the Open Magnetic Flux Density in the Heliosphere
Dósa, M.; Erdős, G.
Open magnetic flux in the heliosphere is determined from the radial component of the magnetic field vector measured onboard interplanetary space probes. Previous Ulysses research has shown remarkable independence of the flux density from heliographic latitude, explained by super-radial expansion of plasma. Here we are investigating whether any lon…
Nanograin Density Outside Saturn’s A Ring
Persoon, A. M.; Johnson, Robert E.; Tseng, Wei-Ling +1 more
The observed disparity between the radial dependence of the ion and electron densities measured by the Cassini plasma (CAPS) and radio (RPWS) science instruments are used to show that the region between the outer edge of Saturn’s main rings and its tenuous G ring is permeated with small charged grains (nanograins). These grains emanate from the ed…
The Luminous Blue Variable RMC 127 as Seen with ALMA and ATCA
Paladini, R.; Umana, G.; Bauer, F. E. +12 more
We present ALMA and ATCA observations of the luminous blue variable RMC 127. The radio maps show for the first time the core of the nebula and evidence that the nebula is strongly asymmetric with a Z-pattern shape. Hints of this morphology are also visible in the archival Hubble Space Telescope {{H}}α image, which overall resembles the radio emiss…
3XMM J181923.7-170616: An X-Ray Binary with a 408 s Pulsar
Qiu, Hao; Zhou, Ping; Xu, Xiaojie +2 more
We carry out a dedicated study of 3XMM J181923.7-170616 with an approximate pulsation period of 400 s using the XMM-Newton and Swift observations spanning across nine years. We have refined the period of the source to 407.904(7) s (at epoch MJD 57142) and constrained the 1σ upper limit on the period derivative \dot{P}≤slant 1.1× {10}-8 …
A Molecular-line Study of the Interstellar Bullet Engine IRAS05506+2414
Morris, Mark R.; Lee, Chin-Fei; Patel, Nimesh +3 more
We present interferometric and single-dish molecular line observations of the interstellar bullet-outflow source IRAS 05506+2414, whose wide-angle bullet spray is similar to the Orion BN/KL explosive outflow and likely arises from an entirely different mechanism than the classical accretion-disk-driven bipolar flows in young stellar objects. The b…
Spectral Energy Distribution Mapping of Two Elliptical Galaxies on Sub-kpc Scales
Gaspari, M.; Amblard, A.; Temi, P. +1 more
We use high-resolution Herschel-PACS data of two nearby elliptical galaxies, IC 1459 and NGC 2768, to characterize their dust and stellar content. IC 1459 and NGC 2768 have an unusually large amount of dust for elliptical galaxies ((1-3) × 105 {M}⊙ ); this dust is also not distributed along the stellar content. Using data fro…
Dependence of the Peak Fluxes of Solar Energetic Particles on CME 3D Parameters from STEREO and SOHO
Moon, Y. -J.; Lee, Harim; Park, Jinhye
We investigate the relationships between the peak fluxes of 18 solar energetic particle (SEP) events and associated coronal mass ejection (CME) 3D parameters (speed, angular width, and separation angle) obtained from SOHO, and STEREO-A/B for the period from 2010 August to 2013 June. We apply the STEREO CME Analysis Tool (StereoCAT) to the SEP-asso…
Erratum: “Dust and Gas in the Magellanic Clouds from the HERITAGE Herschel Key Project. I. Dust Properties and Insights into the Origin of the Submm Excess Emission” (2014, ApJ, 797, 85)
Okumura, K.; Gordon, Karl D.; Bot, Caroline +33 more