Search Publications
Missions
Journals
Publication Years
Globular Cluster UVIT Legacy Survey (GlobULeS). III. Omega Centauri in Far-ultraviolet
Dalessandro, Emanuele; Rao, N. Kameswara; Hutchings, John +21 more
We present the first comprehensive study of the most massive globular cluster, Omega Centauri, in the far-ultraviolet (FUV), extending from the center to ~28% of the tidal radius using the Ultraviolet Imaging Telescope on board AstroSat. A comparison of the FUV-optical color-magnitude diagrams with available canonical models reveals that horizonta…
Consolidation of the Gaia catalogue with Chinese Space Station Telescope astrometry
Lattanzi, M.; Busonero, D.; Cancelliere, R. +4 more
The issue of preservation and improvement of the Gaia catalogue throughout the next few decades is addressed. The goal of this paper is to evaluate the feasibility of astrometric parameter update, for objects already in the catalogue, by inclusion of new observations from other space missions, in particular CSST. The proposed approach consists in …
Magnetohydrodynamic Simulation of Multiple Coronal Mass Ejections: An Effect of "Pre-events"
Wood, Brian E.; Wu, Chin-Chun; Liou, Kan +1 more
Coronal mass ejections (CMEs) are a major source of solar wind disturbances that affect the space plasma and magnetic field environment along their propagation path. Accurate prediction of the arrival of a CME at Earth or any point in the heliosphere is still a daunting task. In this study we explore an often overlooked factor-the effects of "pre-…
The nature of the Cygnus extreme B supergiant 2MASS J20395358+4222505
Lennon, D. J.; Herrero, A.; Comerón, F. +19 more
2MASS J20395358+4222505 is an obscured early B supergiant near the massive OB star association Cygnus OB2. Despite its bright infrared magnitude (Ks = 5.82) it has remained largely ignored because of its dim optical magnitude (B = 16.63, V = 13.68). In a previous paper, we classified it as a highly reddened, potentially extremely lumino…
Constraining the Size of the Circumgalactic Medium Using the Transverse Autocorrelation Function of C IV Absorbers in Paired Quasar Spectra
Martin, Crystal L.; Rafelski, Marc; Jorgenson, Regina A. +6 more
The circumgalactic medium (CGM) plays a vital role in the formation and evolution of galaxies, acting as a lifeline between galaxies and the surrounding intergalactic medium. In this study, we leverage a unique sample of quasar pairs to investigate the properties of the CGM with absorption line tomography. We present a new sample of medium-resolut…
Investigating the Observational Properties of Type Ib Supernova SN 2017iro
Kumar, Brajesh; Anupama, G. C.; Singh, Avinash +1 more
We report results of optical imaging and low-resolution spectroscopic monitoring of supernova (SN) 2017iro that occurred in the nearby (~31 Mpc) galaxy NGC 5480. The He I λ5876 feature present in the earliest spectrum (-7 days) classified it as a Type Ib SN. The follow-up observations span from -7 to +266 days with respect to the B-band maximum. W…
ULISSE: A tool for one-shot sky exploration and its application for detection of active galactic nuclei
Paolillo, Maurizio; Brescia, Massimo; Cavuoti, Stefano +5 more
Context. Modern sky surveys are producing ever larger amounts of observational data, which makes the application of classical approaches for the classification and analysis of objects challenging and time consuming. However, this issue may be significantly mitigated by the application of automatic machine and deep learning methods.
Aims: We p…
Martian Lee-wave cloud near Ascraeus Mons during Martian years 33 and 34: a study based on the Mars color camera (MCC) images
Kalita, J.; Mishra, M. K.; Guha, A.
The north-eastern slope of Ascraeus Mons in Mars shows evidence of gravity wave cloud formation, commonly known as Lee-wave cloud. Mars color camera, onboard India's first Mars orbiter mission, has captured over 25 images of Lee-wave clouds during Martian years 33 and 34. In our present study, our main objective is to estimate the atmospheric para…
Analysis of the long-term drift rates and oscillations of Jupiter's largest vortices
Simon, Amy A.; Morales-Juberías, Raúl; Cosentino, Richard G.
Jupiter's troposphere is dynamically characterized by a series of alternating eastward and westward jets. Embedded between these alternating jets, large vortices, characterized by their high speed closed circulations can be found in several latitudinal bands. The Great Red Spot (GRS) and the White Ovals (WOS) located at ≈ 22 and ≈ 30 degrees south…
Study on the magnetic field strength of NGC 300 ULX1
Li, Z. S.; Pan, Y. Y.; Zhong, J. X. +1 more
NGC 300 ULX1 is a pulsating ultraluminous X-ray source (PULX) with the longest spin period of $P\simeq 31.6\, \rm s$ and a high spin-up rate of $\dot{P}\simeq -5.56\times 10^{-7}\, \rm s\, s^{-1}$ that is ever seen in the confirmed PULXs. In this paper, the inferred magnetic field of NGC 300 ULX1 is $\sim 3.0\times 10^{14}\, \rm G$ using the recen…