Thursday, August 19, 2021

Jillian Scudder publishes in MNRAS; senior Loubna El Meddah El Idrissi is one of three co-authors

 Jillian M. Scudder, Assistant Professor of Physics; Sara L. Ellison; Loubna El Meddah El Idrissi; Henry Poetrodjojo. Conversions between gas-phase metallicities in MaNGA. Monthly Notices of the Royal Astronomical Society (submitted 10 August, 2021; accepted 12 August 2021)  Pre-publication access: arXiv: 2108.04934  20 pages, 14 figures, 4 tables. Supplementary material available online


From the abstract: We present polynomial conversions between each of 11 different strong line gas-phase metallicity calibrations, each based on ∼ 1.1 million star-forming spaxels in the public Sloan Digital Sky Survey (SDSS) Data Release 15 (DR15) Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) survey.  

New Publications: Dan Stinebring with NANOGrav in Astrophysical Journal, and Franne Kamhi in Journal of Experimental Biology

 


Turner, J. E., McLaughlin, M. A., Cordes, J. M., Lam, M. T., Shapiro-Albert, B. J., Stinebring, Dan R. ... NANOGrav Collaboration. (2021). The NANOGrav 12.5 year data set: monitoring interstellar scattering delays. Astrophysical Journal, 917(1), article 10.

From the abstract: "We extract interstellar scintillation parameters for pulsars observed by the NANOGrav radio pulsar timing program.  ...For most pulsars for which scattering delays are measurable, we find that time-of-arrival uncertainties for a given epoch are larger than our scattering delay measurements, indicating that variable scattering delays are currently subdominant in our overall noise budget but are important for achieving precisions of tens of nanoseconds or less."

Islam, M., Deeti, S., Kamhi, J. Frances, & Cheng, K. (2021). Minding the gap: learning and visual scanning behaviour in nocturnal bull ants. Journal of Experimental Biology, 224(14), jeb242245.

From the abstract: "Insects possess small brains but exhibit sophisticated behaviour, specifically their ability to learn to navigate within complex environments. To understand how they learn to navigate in a cluttered environment, we focused on learning and visual scanning behaviour in the Australian nocturnal bull ant, Myrmecia midas, which are exceptional visual navigators."


Friday, July 02, 2021

Dan Stinebring publishes in Astrophysical Journal with NANOGrav Collaboration

Emeritus Professor of Physics Dan Stinebring is a senior member of the NANOGrav Collaboration.  See the recent story of his work in Campus Digest

New publication from the Collaboration:

Arzoumanian, Zaven; Paul T. Baker; Adam Brazier; Paul R. Brook, et al.  2021. The NANOGrav 11 yr Data Set: Limits on Supermassive Black Hole Binaries in Galaxies within 500 Mpc.  Astrophysical Journal 914:121.  Access in OhioLINK Electronic Journal Center or pre-published version on ArXiv.

Learn more about NANOGrav, The North American Nanohertz Observatory for Gravitational Waves

Photo: The 100-meter Green Bank Telescope, the world's largest fully steerable telescope. Image credit: NRAO

Friday, June 11, 2021

New publication from Dan Stinebring with alumnus Hengrui Zhu, and from Michael Moore with collaborators in China and Missouri

AAS and IOP publication
As found in the Web of Science:

  • a recent publication from Emeritus Professor of Physics and Astronomy Dan Stinebring and May graduate Hengrui Zhu. 

Dolch, T., Daniel R. Stinebring, G. Jones, Hengrui Zhu '21, R. S. Lynch, T. Cohen, P. B. Demorest, M. T. Lam, L. Levin, M. A. McLaughlin, and N. T. Palliyaguru. 2021. Deconvolving pulsar signals with cyclic spectroscopy: a systematic evaluation. Astrophysical Journal 913:98.


From the abstract: "We show that cyclic spectroscopy is most effective for high [signal-to-noise ratio] and/or highly scattered pulsars. We conclude that cyclic spectroscopy could play an important role in scattering correction to distant populations of highly scattered pulsars not currently included in PTAs."

  • and from Professor of Biology Mike Moore:

Zhang, Y., T. Deng, L. Sun, J. B. Landis, Michael J. Moore, H. Wang, Y. Wang, X. Hao, J. Chen, S. Li, M. Xu, P. Puno, P. H. Raven, and H. Sun. 2021. Phylogenetic patterns suggest frequent multiple origins of secondary metabolites across the seed-plant 'tree of life'. National Science Review 8:nwaa105.

The concluding sentence of the abstract notes that "the distribution patterns for [plant secondary metabolites] observed in this study may also be useful in the search for natural compounds for medicinal purposes."

Thursday, June 03, 2021

Michael Moore and alumni Noah Last and Riva Bruenn are co-authors in Botanical Journal of the Linnean Society

This recent publication from Professor of Biology Mike Moore explores the evolution of fruiting structures in Nyctaginaceae, known as the Four-o'clock family of flowering trees, shrubs, and herbs.

Sukhorukov, A. P., M. Nilova V.,
Journal cover from Oxford Univ Press site
Journal cover from Oxford Univ Press
Michael J. Moore, Riva Bruenn, Noah Last
, E. F. Sandoli Rossetto, and N. A. Douglas. 2021. Anatomical diversity and evolution of the anthocarp in Nyctaginaceae. Botanical Journal of the Linnean Society 196:21-52.  Access at OhioLINK Journal Center

From the abstract: We investigate anthocarp evolution in Nyctaginaceae through extensive anatomical studies (159 species from 28 genera representing six of seven tribes) and phylogenetic character state reconstructions. We found highly diverse anthocarp anatomy across Nyctaginaceae, with most traits analysed evolving multiple times throughout the family.

More about Nyctaginaceae, from ScienceDirect.

Tuesday, June 01, 2021

Assistant Professor of Physics Jillian Scudder is a coauthor on two new publications

Teimoorinia, H., M. Jalilkhany, Jillian M. Scudder, J. Jensen, and S. L. Ellison. 2021. A reassessment of strong line metallicity conversions in the machine learning era. Monthly Notices of the Royal Astronomical Society 503:1082-1095. https://doi.org/10.1093/mnras/stab466

From the Abstract
The random forest (RF) algorithm [developed by the authors] is non-parametric and therefore more flexible than polynomial conversions, due to its ability to capture non-linear behaviour in the data. The RF method yields the same accuracy as the (updated) polynomial conversions, but has the significant advantage that a single model can be applied over a wide range of metallicities, without the need to distinguish upper and lower branches in R-23 calibrations. The trained RF is made publicly available for use in the community. Access on ArXiv (preprint version, Feb. 16, 2021)

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Also accessible on ArXiv is this publication describing a project that allows easier study of distant galaxies across wavelength.

Shirley, R., K. Duncan ...J. Scudder, et al. 2021. HELP: The Herschel Extragalactic Legacy Project. arXiv:2105.05659 [astro-ph.GA]

From the Abstract
With this project definition paper we provide full access to the first data release of HELP; Data Release 1 (DR1), including a monolithic map of the largest SPIRE extragalactic field at 385 deg2 and 18 million measurements of PACS and SPIRE fluxes. We also provide tools to access and analyse the full HELP database. This new data set includes far-infrared photometry, photometric redshifts, and derived physical properties estimated from modelling the spectral energy distributions.

Tuesday, May 25, 2021

New publications by Geology and Physics faculty

 Zeb Page and Dan Stinebring published these papers in the past two months:

Cruz-Uribe, A. M., F. Zeb Page, Associate Professor of Geology, et al. 2021. Trace element and isotopic zoning of garnetite veins in amphibolitized eclogite, Franciscan Complex, California, USA. Contributions to Mineralogy and Petrology 176:41.

Pol, N. S. … Daniel R. Stinebring, Emeritus Professor of Physics, et al., and NANOGrav Collaboration. 2021. Astrophysics milestones for pulsar timing array gravitational-wave detection. Astrophysical Journal Letters 911:L34.

Yao, J. … Daniel R. Stinebring, Emeritus Professor of Physics, et al. Evidence for three-dimensional spin-velocity alignment in a pulsar. Nature Astronomy, early access May 2021.

Thursday, May 13, 2021

Geology faculty publish in Frontiers in Marine Science; Earth and Planetary Science

Assistant Professor Rachel Eveleth and Associate Professor Amanda Schmidt, both of the Geology Department, published journal articles recently.  Alex Grande, Class of 2020, is the first author on the paper with Prof. Schmidt.

Grande, AlexandraAmanda H. Schmidt, P. R. Bierman, L. B. Corbett, C. Lopez-Lloreda, J. Willenbring, W. H. McDowell, and M. W. Caffee. 2021. Landslides, hurricanes, and sediment sourcing impact basin-scale erosion estimates in Luquillo, Puerto Rico. Earth and Planetary Science Letters 562:116821.


Eveleth, Rachel, D. M. Glover, M. C. Long, I. D. Lima, A. P. Chase, and S. C. Doney. 2021. Assessing the Skill of a High-resolution marine biophysical model using geostatistical analysis of mesoscale ocean chlorophyll variability from field observations and remote sensing. Frontiers in Marine Science 8:612764.

The publisher notes that this article is part of the research topic "Unraveling Mechanisms Underlying Annual Plankton Blooms in the North Atlantic and their Implications for Biogenic Aerosol Properties and Cloud Formation"  View all 17 articles on the topic from Frontiers in Marine Science.  Open Access.