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Knowledge Inventory of Foundational Data Products in Planetary Science
Beyer, Ross A.; Laura, Jason R.
Some of the key components of any Planetary Spatial Data Infrastructure (PDSI) are the data products that end-users wish to discover, access, and interrogate. One precursor to the implementation of a PSDI is a knowledge inventory that catalogs what products are available, from which data producers, and at what initially understood data qualities. …
IRIS observations of chromospheric heating by acoustic waves in solar quiet and active regions
Heinzel, P.; Liu, W.; Švanda, M. +3 more
Aims: To study the heating of solar chromospheric magnetic and nonmagnetic regions by acoustic and magnetoacoustic waves, the deposited acoustic-energy flux derived from observations of strong chromospheric lines is compared with the total integrated radiative losses.
Methods: A set of 23 quiet-Sun and weak-plage regions were observed in…
Fractal dimension of optical cirrus in Stripe82
Gontcharov, George A.; Mosenkov, Aleksandr V.; Román, Javier +4 more
The geometric characteristics of dust clouds provide important information on the physical processes that structure such clouds. One of such characteristics is the 2D fractal dimension D of a cloud projected on to the sky plane. In previous studies, which were mostly based on infrared (IR) data, the fractal dimension of individual clouds was found…
Hubble Space Telescope Observations of the Old Pulsar PSR J0108-1431
Pavlov, George G.; Mignani, Roberto P.; Abramkin, Vadim +1 more
We present results of optical-UV observations of the 200 Myr old rotation-powered radio pulsar J0108-1431 with the Hubble Space Telescope. We found a putative candidate for the far-UV (FUV) pulsar counterpart, with the flux density fν = 9.0 ± 3.2 nJy at λ = 1528 Å. The pulsar was not detected, however, at longer wavelengths, with 3σ upp…
Stellar kinematics in the nuclear regions of nearby LIRGs with VLT-SINFONI. Comparison with gas phases and implications for dynamical mass estimations
Colina, L.; Arribas, S.; Pereira-Santaella, M. +3 more
Context. Nearby luminous infrared galaxies (LIRGs) are often considered to be the local counterpart of the star forming galaxy (SFG) population at z > 1. Therefore, local LIRGs are ideal systems with which to perform spatially resolved studies on the physical processes that govern these objects and to validate assumptions made in high-z studies…
Observing correlations between dark matter accretion and galaxy growth - I. Recent star formation activity in isolated Milky Way-mass galaxies
Behroozi, Peter; More, Surhud; O'Donnell, Christine
The correlation between fresh gas accretion on to haloes and galaxy star formation is critical to understanding galaxy formation. Different theoretical models have predicted different correlation strengths between halo accretion rates and galaxy star formation rates, ranging from strong positive correlations to little or no correlation. Here, we p…
Termination of Solar Cycles and Correlated Tropospheric Variability
McIntosh, Scott W.; Leamon, Robert J.; Marsh, Daniel R.
The Sun provides the energy required to sustain life on Earth and drive our planet's atmospheric circulation. However, establishing a solid physical connection between solar and tropospheric variability has posed a considerable challenge. The canon of solar variability is derived from the 400 years of observations that demonstrates the waxing and …
Detection of a Multiphase Intragroup Medium: Results from the COS-IGrM Survey
Heckman, Timothy; Tumlinson, Jason; Borthakur, Sanchayeeta +3 more
We present the results of the Cosmic Origins Spectrograph-Intragroup Medium (COS-IGrM) Survey that used the COS on the Hubble Space Telescope to observe a sample of 18 UV bright quasars, each probing the IGrM of a galaxy group. We detect Lyα, C II, N V, Si II, Si III, and O VI in multiple sightlines. The highest ionization species detected in our …
TIMES. I. A Systematic Observation in Multiple Molecular Lines toward the Orion A and Ophiuchus Clouds
Cho, Jungyeon; Choi, Minho; Choi, Yunhee +16 more
We have used the Taeduk Radio Astronomy Observatory to observe the Orion A and Ophiuchus clouds in the J = 1-0 lines of 13CO, C18O, HCN, HCO+, and N2H+ and the J = 2-1 line of CS. The fully sampled maps with uniform noise levels are used to create moment maps. The variations of the line intens…
Evidence for SO2 latitudinal variations below the clouds of Venus
Bézard, B.; Marcq, E.; Amine, I. +1 more
Context. Sulphur dioxide (SO2) is highly variable above the clouds of Venus, yet no spatial or temporal variability below the clouds had been known until now.
Aims: In order to constrain Venus's atmospheric circulation and chemistry (including possible volcanic outgassing), more accurate SO2 measurements below the clouds…