Search Publications
Testing the Breathing Mode in Intermediate-mass Galaxies and Its Predicted Star Formation Rate-size Anti-correlation
Kelson, Daniel D.; Patel, Shannon G.; Tonnesen, Stephanie +2 more
Recent hydrodynamical simulations predict that stellar feedback in intermediate-mass galaxies (IMGs) can drive strong fluctuations in structure (e.g., half-light radius, R e ). This process operates on timescales of only a few hundred Myr and persists even at late cosmic times. One prediction of this quasi-periodic, galactic-scale “bre…
Twisting/Swirling Motions during a Prominence Eruption as Seen from SDO/AIA
Banerjee, D.; Ray, S.; Pant, V. +2 more
A quiescent prominence was observed at the northwest limb of the Sun using different channels of the Atmospheric Imaging Assembly on board the Solar Dynamics Observatory. We report and analyze twisting/swirling motions during and after the prominence eruption. We segregate the observed rotational motions into small and large scales. Small-scale ro…
Multiwavelength follow-up observations of the tidal disruption event candidate 2XMMi J184725.1-631724
Strader, Jay; Lin, Dacheng; Grupe, Dirk +5 more
The ultrasoft X-ray flare 2XMMi J184725.1-631724 was serendipitously detected in two XMM-Newton observations in 2006 and 2007, with a peak luminosity of 6 × 1043 erg s-1. It was suggested to be a tidal disruption event (TDE) because its position is consistent with the centre of an inactive galaxy. It is the only known X-ray T…
Reducing and Analyzing the PHAT Survey with the Cloud
Williams, Benjamin F.; Olsen, Knut; Rosema, Keith +2 more
We discuss the technical challenges we faced and the techniques we used to overcome them when reducing the Panchromatic Hubble Andromeda Treasury (PHAT) photometric data set on the Amazon Elastic Compute Cloud (EC2). We first describe the architecture of our photometry pipeline, which we found particularly efficient for reducing the data in multip…
Olympus Mons volcano, Mars: A photogeologic view and new insights
Mouginis-Mark, Peter
Theory, modeling, and integrated studies in the Arase (ERG) project
Miyoshi, Yoshizumi; Saito, Shinji; Seki, Kanako +17 more
Understanding of underlying mechanisms of drastic variations of the near-Earth space (geospace) is one of the current focuses of the magnetospheric physics. The science target of the geospace research project Exploration of energization and Radiation in Geospace (ERG) is to understand the geospace variations with a focus on the relativistic electr…
Data calibration for the MASCARA and bRing instruments
Snellen, I. A. G.; Mamajek, E. E.; Kenworthy, M. A. +8 more
Aims: MASCARA and bRing are photometric surveys designed to detect variability caused by exoplanets in stars with mV < 8.4. Such variability signals are typically small and require an accurate calibration algorithm, tailored to the survey, in order to be detected. This paper presents the methods developed to calibrate the raw ph…
CHANG-ES - XI. Circular polarization in the cores of nearby galaxies
Saikia, D. J.; Wang, Q. Daniel; Wiegert, Theresa +18 more
We detect five galaxies in the Continuum Halos in Nearby Galaxies - an EVLA Survey (CHANG-ES) sample that show circular polarization (CP) at L band in our high-resolution data sets. Two of the galaxies (NGC 4388 and NGC 4845) show strong Stokes V/I ≡ mC ∼ 2 per cent, two (NGC 660 and NGC 3628) have values of mC ∼ 0.3 per cent…
The Dusty Plasma Disk Around the Janus/Epimetheus Ring
Gurnett, D. A.; Persoon, A. M.; Kurth, W. S. +5 more
We report on the electron, ion, and dust number densities and the electron temperatures obtained by the Radio and Plasma Wave Science instruments onboard Cassini during the Ring-Grazing orbits. The numerous ring passage observations show a consistent picture as follows: (1) Beyond 0.1 RS above and below the equator the electron and ion …
Research Progresses of Halo Streams in the Solar Neighborhood
Zhao, Gang; Liang, Xi-long; Zhao, Jing-kun +1 more
The stellar streams originated from the Galactic halo may be detected when they pass by the solar neighborhood, and they still keep some information at their birth times. Thus, the investigation of halo streams in the solar neighborhood is very important for understanding the formation and evolution of our Galaxy. In this paper, the researches of …