Search Publications
Missions
Journals
Publication Years
Low-mass Stellar and Substellar Content of the Young Cluster Berkeley 59
Samal, Manash R.; Sharma, Saurabh; Panwar, Neelam +4 more
We present a multiwavelength analysis of the young star cluster Berkeley 59, based on Gaia data and deep IR observations with the 3.58 m Telescopio Nazionale Galileo and Spitzer space telescope. The mean proper motion of the cluster is found to be µ α cosδ ∼ ‑0.63 mas yr‑1 and µ δ ∼ ‑1.83 mas yr…
BSEC Method for Unveiling Open Clusters and its Application to Gaia DR3: 83 New Clusters
Li, Zhong-Mu; Mao, Cai-Yan
Open clusters (OCs) are common in the Milky Way, but most of them remain undiscovered. There are numerous techniques, including some machine-learning algorithms, available for the exploration of OCs. However, each method has its limitations and therefore, different approaches to discovering OCs hold significant values. We develop a comprehensive a…
The role of magnetar transient activity in time-domain and multimessenger astronomy
Younes, George; Negro, Michela; Burns, Eric +3 more
Time-domain and multimessenger astronomy (TDAMM) involves the study of transient and time-variable phenomena across various wavelengths and messengers. The Astro2020 Decadal Survey has identified TDAMM as the top priority for NASA in this decade, emphasizing its crucial role in advancing our understanding of the universe and driving new discoverie…
COSMOS2020: Investigating the AGN-obscured accretion phase at z ∼ 1 via [Ne V] selection
Pozzi, F.; Lapi, A.; Vignali, C. +7 more
The black hole-and-galaxy (BH-galaxy) co-evolution paradigm predicts a phase where most of the star formation (SF) and BH accretion takes place in gas-rich environments, namely, in what are likely to be very obscured conditions. In the first phase of this growth, some of the galactic gas is funnelled toward the centre of the galaxy and is accreted…
Revisiting the effect of lens mass models in cosmological applications of strong gravitational lensing
Harvey-Hawes, Christopher; Wiltshire, David L.
Strong gravitational lens system catalogues are typically used to constrain a combination of cosmological and empirical power-law lens mass model parameters, often introducing additional empirical parameters and constraints from high resolution imagery. We investigate these lens models using Bayesian methods through a novel alternative that treats…
Filter Design for Estimation of Stellar Metallicity: Insights from Experiments with Gaia XP Spectra
Xiang, Maosheng; Huang, Yang; Liu, Jifeng +11 more
We search for an optimal filter design for the estimation of stellar metallicity, based on synthetic photometry from Gaia XP spectra convolved with a series of filter-transmission curves defined by different central wavelengths and bandwidths. Unlike previous designs based solely on maximizing metallicity sensitivity, we find that the optimal solu…
An Algorithm to Mitigate Charge Migration Effects in Data from the Near Infrared Imager and Slitless Spectrograph on the James Webb Space Telescope
Volk, Kevin; Bushouse, Howard; Goudfrooij, Paul +1 more
We present an algorithm that mitigates the effects of charge migration due to the "brighter-fatter effect" (BFE) that occurs for highly illuminated stars in the Teledyne HAWAII-2RG detectors used in the NIRCam, NIRISS, and NIRSpec science instruments aboard the James Webb Space Telescope (JWST). The impact of this effect is most significant for ph…
Propagation of untwisting solar jets from the low-beta corona into the super-Alfvénic wind: Testing a solar origin scenario for switchbacks
Pariat, E.; Froment, C.; Wyper, P. F. +3 more
Context. Parker Solar Probe's (PSP) discovery of the prevalence of switchbacks (SBs), localised magnetic deflections in the nascent solar wind, has sparked interest in uncovering their origins. A prominent theory suggests these SBs originate in the lower corona through magnetic reconnection processes, closely linked to solar jet phenomena. Jets ar…
Viewing the PLATO LOPS2 field through the lenses of TESS
Bayliss, Daniel; Pelisoli, Ingrid; Kunimoto, Michelle +3 more
PLATO will begin observing stars in its Southern Field (LOPS2) after its launch in late 2026. By this time, TESS will have observed the stars in LOPS2 for at least four years. We find that by 2025, on average each star in the PLATO field will have been monitored for 330 d by TESS, with a subset of stars in the TESS continuous viewing zone having o…
JWST reveals a high fraction of disk breaks at 1 ≤ z ≤ 3
Xu, Dewang; Yu, Si-Yue
We analyzed the deconvolved surface brightness profiles of 247 massive and angularly large disk galaxies at 1 ≤ z ≤ 3 to study high-redshift disk breaks, using F356W-band images from the Cosmic Evolution Early Release Science survey (CEERS). We found that 12.6% of these galaxies exhibit type I (exponential) profiles, 56.7% exhibit type II (down-be…