Search Publications
Probing the spectral shape of dust emission with the DustPedia galaxy sample
Clark, Christopher J. R.; Mosenkov, Aleksandr V.; De Looze, Ilse +10 more
The objective of this paper is to understand the variance of the far-infrared (FIR) spectral energy distribution (SED) of the DustPedia galaxies, and its link with the stellar and dust properties. An interesting aspect of the dust emission is the inferred FIR colours which could inform us about the dust content of galaxies, and how it varies with …
Detecting episodes of star formation using Bayesian model selection
Acquaviva, Viviana; Lawler, Andrew J.
Bayesian model comparison frameworks can be used when fitting models to data in order to infer the appropriate model complexity in a data-driven manner. We aim to use them to detect the correct number of major episodes of star formation from the analysis of the spectral energy distributions (SEDs) of galaxies, modelled after 3D-HST galaxies at z ∼…
The z 2 [O III] Luminosity Function of Grism-selected Emission-line Galaxies
Schneider, Donald P.; Gronwall, Caryl; Ciardullo, Robin +7 more
Upcoming missions such as Euclid and the Nancy Grace Roman Space Telescope (Roman) will use emission-line-selected galaxies to address a variety of questions in cosmology and galaxy evolution in the z > 1 universe. The optimal observing strategy for these programs relies on knowing the number of galaxies that will be found and the bias of the g…
Landform evolution of Tharsis Montes and Olympus Mons of Mars: Insights from morphometric, hypsometric and chronologic evidences
Ahmad, Adnan; Nair, Archana M.
We studied the growth and evolutionary history of four major volcanoes of the Tharsis Province based on morphometry, age and hypsometric studies. Shield volcanoes of Tharsis volcanic province demonstrate marginally dissimilar landform evolutionary trends. Arsia Mons is distinct with a single caldera of large diameter and showed the highest asymmet…
Long-term XMM-Newton view of magnetar CXOU J010043.1-721134: comprehensive spectral and temporal results
Chatterjee, Rwitika; Agrawal, Vivek K.; Nandi, Anuj
We present an in-depth analysis and results of eleven XMM-Newton data sets, spanning 2000-2016, of the anomalous X-ray Pulsar CXOU J010043.1-721134 that has been classified as a magnetar. We find a spin period of 8.0275(1) s as of December 2016 and calculate the period derivative to be (1.76 ± 0.02) × 10-11 s s-1, which trans…
CSS J213934.3-050020: A New Double-mode High-amplitude δ Scuti-type Pulsating Star
Shi, Xiang-dong; Qian, Sheng-bang; Li, Lin-jia +1 more
CSS J213934.3-050020 (hereafter J213934) was originally found as an EW-type eclipsing binary star with a period of 0.225456 days by Catalina Real-time Transient Survey. With the stellar atmospheric parameters from the LAMOST, it is found that the temperature is much higher than those of normal EW-type binaries and does not follow the period-temper…
Formation of Isolated Radio Type II Bursts at Low Frequencies
Pohjolainen, Silja; Talebpour Sheshvan, Nasrin
The first appearance of radio type II burst emission at decameter-hectometer (DH) waves typically occurs in connection, and often simultaneously, with other types of radio emissions. As type II bursts are signatures of propagating shock waves that are associated with flares and coronal mass ejections (CMEs), a rich variety of radio emissions can b…
The Structure of the Cusp Diamagnetic Cavity and Test Particle Energization in the GAMERA Global MHD Simulation
Merkin, V.; Otto, A.; Nykyri, K. +4 more
Electrons with energies ≥40 keV can be found at low density in many different regions of Earth's magnetosphere. A litany of fundamental questions in space physics have focused on the acceleration mechanism of these particles, given that the sources of plasma are the relatively cool ionosphere and solar wind (∼1-100s eV). Upgraded global solar wind…
The Hubble Space Telescope UV Legacy Survey of Galactic Globular Clusters. XXII. Relative ages of multiple populations in five globular clusters
Piotto, G.; Nardiello, D.; Lucertini, F.
Aims: We present a new technique to estimate the relative ages of multiple stellar populations hosted by the following five globular clusters: NGC 104 (47 Tuc), NGC 6121 (M 4), NGC 6352, NGC 6362, and NGC 6723.
Methods: We used the catalogs of the database HST UV Globular Cluster Survey to create color-magnitude and two-color diagrams of…
Probing Upflowing Regions in the Quiet Sun and Coronal Holes
Hara, Hirohisa; Sterling, Alphonse C.; Orozco Suárez, David +5 more
Recent observations from Parker Solar Probe have revealed that the solar wind has a highly variable structure. How this complex behaviour is formed in the solar corona is not yet known, since it requires omnipresent fluctuations, which constantly emit material to feed the wind. In this article we analyse 14 upflow regions in the solar corona to fi…