Search Publications
Weak Lensing Analysis of A2390 Using Short Exposures
Li, G.; Bonafede, A.; Peterson, J. R. +4 more
We present a weak lensing analysis of the galaxy cluster A2390 at z = 0.23 using second moment shape measurements made in 411 short 60 s exposures. The exposures are obtained in three broadband photometric filters (g, r, and i) using WIYN-ODI. Shape measurement in individual exposures is done using a moment-matching algorithm. Forced measurement i…
A reanalysis of the LHS 1140 b atmosphere observed with the Hubble Space Telescope
Petralia, Antonino; Micela, Giuseppina; Maldonado, Jesús +3 more
The super-Earth LHS 1140 b is an interesting target for atmospheric observations since it is close to the habitable zone of its star and falls in the gap of the radius distribution of small exoplanets, in the region thought to correspond to the transition between planets with and without atmospheres. Observations of the primary transit with WFC3 o…
Investigating the Star-forming Sites in the Outer Galactic Arm
Sharma, Saurabh; Verma, Aayushi; Kaur, Harmeen +7 more
We aim to investigate the global star formation scenario in star-forming sites AFGL 5157, [FSR2007] 0807 (hereafter FSR0807), [HKS2019] E70 (hereafter E70), [KPS2012] MWSC 0620 (hereafter KPS0620), and IRAS 05331+3115 in the outer Galactic arm. The distribution of young stellar objects in these sites coincides with a higher extinction and H2<…
Counting the Unseen. I. Nuclear Density Scaling Relations for Nucleated Galaxies
Stone, Nicholas C.; Seth, Anil C.; van Velzen, Sjoert +1 more
The volumetric rate of tidal disruption events (TDEs) encodes information on the still-unknown demographics of central massive black holes (MBHs) in low-mass galaxies (≲109 M ⊙). Theoretical TDE rates from model galaxy samples can extract this information, but this requires accurately defining the nuclear stellar density stru…
EUHFORIA modelling of the Sun-Earth chain of the magnetic cloud of 28 June 2013
Schmieder, B.; Poedts, S.; Carbone, V. +5 more
Context. Predicting geomagnetic events starts with an understanding of the Sun-Earth chain phenomena in which (interplanetary) coronal mass ejections (CMEs) play an important role in bringing about intense geomagnetic storms. It is not always straightforward to determine the solar source of an interplanetary coronal mass ejection (ICME) detected a…
The VISCACHA survey - IX. The SMC Southern Bridge in 8D
Minniti, D.; Bica, E.; Fernández-Trincado, J. G. +16 more
The structure of the Small Magellanic Cloud (SMC) outside of its main body is characterized by tidal branches resulting from its interactions mainly with the Large Magellanic Cloud (LMC). Characterizing the stellar populations in these tidal components helps to understand the dynamical history of this galaxy and of the Magellanic system in general…
Upper limits of 44Ti decay emission in four nearby thermonuclear supernova remnants
Zhou, Ping; Wik, Daniel R.; Chen, Yang +2 more
To identify progenitors and investigate evidence of He burning, we searched for decay radiation of freshly synthesized 44Ti in four young nearby thermonuclear supernova remnants: Kepler, SN 1885, G1.9+0.3, and SN 1006, by analysing the up-to-date NuSTAR archival data. No apparent flux excess from the 68 and 78 keV line emissions accompa…
Spectral Properties and the Influence of Coronal Mass Ejections in 3He-rich Solar Energetic Particle Events
Ho, G. C.; Mason, G. M.; Desai, M. I. +5 more
We analyze the spectral properties of 3He and 4He as well as the heavy ions (oxygen, neon, magnesium, silicon, and iron) in 80 3He-rich solar energetic particle (SEP) events observed by the Ultra-Low-Energy Ion Spectrometer on board the Advanced Composition Explorer spacecraft since its launch in 1997 until 2024. W…
Doppler signature of a possible termination shock in an off-limb solar flare
Chen, Bin; Yu, Sijie; Matthews, Sarah A. +2 more
We report striking Doppler velocity gradients observed during the well-observed 2017 September 10 solar flare, and argue that they are consistent with the presence of an above-the-looptop termination shock beneath the flare current sheet. Observations from the Hinode Extreme-ultraviolet Imaging Spectrometer measure plasma sheet Doppler shifts up t…
Probing the Dust Grain Alignment Mechanisms in Spiral Galaxies with M51 as the Case Study
Tram, Le Ngoc; Lopez-Rodriguez, Enrique
Magnetic fields (B fields) in galaxies have recently been traced using far-infrared and submillimeter polarimetric observations with the Stratospheric Observatory for Infrared Astronomy, James Clerk Maxwell Telescope, and Atacama Large Millimeter/submillimeter Array. The main assumption is that dust grains are magnetically aligned with the local B…