Fast-Askap Synergy: Quantifying Coexistent Tidal And Ram Pressure Strippings In The Ngc 4636 Group,
2023
The University of Texas Rio Grande Valley
Fast-Askap Synergy: Quantifying Coexistent Tidal And Ram Pressure Strippings In The Ngc 4636 Group, Xuchen Lin, Jing Wang, Virginia Kilborn, Eric W. Peng, Luca Cortese, Alessandro Boselli, Ze-Zhong Liang, Bumhyun Lee, Dong Yang, Juan P. Madrid
Physics & Astronomy Faculty Publications
Combining new H I data from a synergetic survey of Australian Square Kilometre Array Pathfinder (ASKAP) Widefield ASKAP L-band Legacy All-sky Blind surveY and Five-hundred-meter Aperture Spherical radio Telescope with the Arecibo Legacy Fast ALFA data, we study the effect of ram pressure and tidal interactions in the NGC 4636 group. We develop two parameters to quantify and disentangle these two effects on gas stripping in H I-bearing galaxies: the strength of external forces at the optical-disk edge, and the outside-in extents of H I-disk stripping. We find that gas stripping is widespread in this group, affecting 80% of H …
Jwst-Tst Dreams: Quartz Clouds In The Atmosphere Of Wasp-17b,
2023
Dordt University
Jwst-Tst Dreams: Quartz Clouds In The Atmosphere Of Wasp-17b, David Grant, Nikole K. Lewis, Hannah R. Wakeford, Natasha E. Batalha, Ana Glidden, Jayesh Goyal, Elijah Mullens, Ryan J. Macdonald, Erin M. May, Sara Seager, Kevin B. Stevenson, Jeff A. Valenti, Channon Visscher, Lili Alderson, Natalie H. Allen, Caleb I. Canas, Knicole Colon, Mark Clampin, Nestor Espinoza, Amelie Gressier, Jingcheng Huang, Zifan Lin, Douglas Long, Dana R. Louie, Maria Pena-Guerrero, Sukrit Ranjan, Kristin S. Sotzen, Daniel Valentine, Jay Anderson, William O. Balmer, Andrea Bellini, Kielan K. W. Hoch, Jens Kammerer, Mattia Libralato, C. Matt Mountain, Marshall D. Perrin, Laurent Pueyo, Emily Rickman, Isabel Rebollido, Sangmo Tony Sohn, Roeland P. Van Der Marel, Laura L. Watkins
Faculty Work Comprehensive List
Clouds are prevalent in many of the exoplanet atmospheres that have been observed to date. For transiting exoplanets, we know if clouds are present because they mute spectral features and cause wavelength-dependent scattering. While the exact composition of these clouds is largely unknown, this information is vital to understanding the chemistry and energy budget of planetary atmospheres. In this work, we observe one transit of the hot Jupiter WASP-17b with JWST's Mid-Infrared Instrument Low Resolution Spectrometer and generate a transmission spectrum from 5 to 12 μm. These wavelengths allow us to probe absorption due to the vibrational modes of …
Core Destruction In Knockout Reactions,
2023
East Texas A&M University
Core Destruction In Knockout Reactions, Carlos A. Bertulani
Faculty Publications
A model is presented to calculate projectile core destruction in knockout reactions. It incorporates physics arguments similar to the formulation of the state of the art theory to calculate stripping and diffraction dissociation cross sections in heavy ion collisions with bombarding energies around 100 MeV/nucleon and larger. It is shown that secondary collisions between the incoming and struck nucleons with the projectile core decrease the core survival probability by as much as 9.5%. However, no clear evidence is found for reduction of the cross section with increasing binding energy of the removed nucleon.
The Accumulation And Growth Of Pseudomonas Aeruginosa On Surfaces Is Modulated By Surface Mechanics Via Cyclic-Di-Gmp Signaling,
2023
The University of Texas Rio Grande Valley
The Accumulation And Growth Of Pseudomonas Aeruginosa On Surfaces Is Modulated By Surface Mechanics Via Cyclic-Di-Gmp Signaling, Liyun Wang, Yu-Chern Wong, Joshua M. Correira, Megan Wancura, Chris J. Geiger, Shanice S. Webster, Ahmed Touhami, Benjamin J. Butler, George A. O’Toole, Richard M. Langford
Physics & Astronomy Faculty Publications
Attachment of bacteria onto a surface, consequent signaling, and accumulation and growth of the surface-bound bacterial population are key initial steps in the formation of pathogenic biofilms. While recent reports have hinted that surface mechanics may affect the accumulation of bacteria on that surface, the processes that underlie bacterial perception of surface mechanics and modulation of accumulation in response to surface mechanics remain largely unknown. We use thin and thick hydrogels coated on glass to create composite materials with different mechanics (higher elasticity for thin composites; lower elasticity for thick composites) but with the same surface adhesivity and chemistry. The …
An Introduction To The Veritas Observatory,
2023
DePauw University
An Introduction To The Veritas Observatory, Alexander Bittle, Ian Kuhl, Jingze (Justin) Zhou, Avery Archer
Annual Student Research Poster Session
Located at the base of Mount Hopkins, Arizona, at an elevation of approximately 4200 feet, the Very Energetic Radiation Imaging Telescope Array System (VERITAS) is a ground-based gamma ray observatory containing four Cherenkov telescopes designed to detect very high energy gamma rays with energies ranging from 100GeV to 10TeV using the Imaging Atmospheric Cherenkov Technique. In April 2007, VERITAS began successful operations with all four telescopes. As of today, over 15 years of data has been taken by the VERITAS array, stored in an archive of data, and used for a wide variety of research, publications, PhD theses, and conventions …
Analysis Of The Crab Nebula And Pulsar,
2023
DePauw University
Analysis Of The Crab Nebula And Pulsar, Alexander Bittle, Ian Kuhl, Jingze (Justin) Zhou, Avery Archer
Annual Student Research Poster Session
Although the Crab Nebula is well understood, the Very Energetic Radiation Imaging Telescope Array System (VERITAS) still regularly observes the Crab's highest energy emissions. These emissions are used to calibrate the telescopes, further, document the system, and investigate the validity of physical models. Our research this summer is geared to analyze data from 2018-2022 to add to an ongoing research project investigating the long term variability of the Crab Nebula’s emission.
The Gbt Diffuse Ionized Gas Survey (Gdigs): Discrete Sources,
2023
West Virginia University
The Gbt Diffuse Ionized Gas Survey (Gdigs): Discrete Sources, Dylan J. Linville, Matteo Luisi, Bin Liu, T. M. Bania, Dana S. Balser, Trey V. Wenger, L. M. Haffner
Publications
The Green Bank Telescope (GBT) Diffuse Ionized Gas Survey (GDIGS) traces ionized gas in the Galactic midplane by observing radio recombination line (RRL) emission from 4–8 GHz. The nominal survey zone is 32.3◦ > ℓ > −5◦, | b | < 0.5◦. Here, we analyze GDIGS Hnα ionized gas emission toward discrete sources. Using GDIGS data, we identify the velocity of 35 H II regions that have multiple detected RRL velocity components. We identify and characterize RRL emission from 88 H II regions that previously lacked measured ionized gas velocities. We also identify and characterize RRL emission from eight locations that appear to be previously-unidentified H II regions and 30 locations of RRL emission that do not appear to be H II regions based on their lack of mid-infrared emission. This latter group may be a compact component of the Galactic Diffuse Ionized Gas (DIG). There are an additional 10 discrete sources that have anomalously high RRL velocities for their locations in the Galactic plane. We compare these objects’ RRL data to 13CO, H I and mid-infrared data, and find that these sources do not have the expected 24 µm emission characteristic of H II regions. Based on this comparison we do not think these objects are H II regions, but we are unable to classify them as a known type of object.
Phys 431/831,
2023
University of Nebraska - Lincoln
Phys 811,
2023
University of Nebraska - Lincoln
Astr 103,
2023
University of Nebraska - Lincoln
Astr 204,
2023
University of Nebraska - Lincoln
Phys 311,
2023
University of Nebraska - Lincoln
Phys 911,
2023
University of Nebraska - Lincoln
Phys 925,
2023
University of Nebraska - Lincoln
Phys 201,
2023
University of Nebraska - Lincoln
Phys 441/841,
2023
University of Nebraska - Lincoln
Astr 224,
2023
University of Nebraska - Lincoln
A Colorful Tribute To Staerkel Planetarium,
2023
Parkland College
A Colorful Tribute To Staerkel Planetarium, Erik Johnson
Natural Science Faculty
On October 1, 1987, the William M. Staerkel Planetarium was dedicated at Parkland College. Alongside the debut of the 50-foot wide dome, the Zeiss M1015 opto-mechanical star projector, dozens of slide projectors, and a 35-mm film projector, a stained glass art piece was installed in the lobby. The piece, called the solar window, was a gift from William and Mary Lou Staerkel in memory of their parents and a tribute to the faculty and staff of the college. The solar window was created by Arthur Stern and has brought light into the planetarium in several unique ways.
Vlti/Gravity Observations And Characterization Of The Brown Dwarf Companion Hd 72946 B,
2023
Johns Hopkins University
Vlti/Gravity Observations And Characterization Of The Brown Dwarf Companion Hd 72946 B, William O. Balmer, Laurent Pueyo, Tomas Stolker, Henrique Reggiani, A. L. Maire, S. Lacour, P. Mollière, M. Nowak, D. Sing, N. Pourré, S. Blunt, J. J. Wang, E. Rickman, J. Kammerer, Th Henning, K. Ward-Duong, R. Abuter, A. Amorim, R. Asensio-Torres, M. Benisty, J. P. Berger, H. Beust, A. Boccaletti, A. Bohn, M. Bonnefoy, H. Bonnet, G. Bourdarot, W. Brandner, F. Cantalloube, P. Caselli, B. Charnay, G. Chauvin
Astronomy: Faculty Publications
Tension remains between the observed and modeled properties of substellar objects, but objects in binary orbits, with known dynamical masses, can provide a way forward. HD 72946 B is a recently imaged brown dwarf companion to a nearby, solar-type star. We achieve ∼100 μas relative astrometry of HD 72946 B in the K band using VLTI/GRAVITY, unprecedented for a benchmark brown dwarf. We fit an ensemble of measurements of the orbit using orbitize! and derive a strong dynamical mass constraint M B = 69.5 ± 0.5 M Jup assuming a strong prior on the host star mass M A = …
Astr 103h,
2023
University of Nebraska - Lincoln
