Search Publications
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…
BepiColombo mission confirms stagnation region of Venus and reveals its large extent
André, N.; Fedorov, A.; Barabash, S. +42 more
The second Venus flyby of the BepiColombo mission offer a unique opportunity to make a complete tour of one of the few gas-dynamics dominated interaction regions between the supersonic solar wind and a Solar System object. The spacecraft pass through the full Venusian magnetosheath following the plasma streamlines, and cross the subsolar stagnatio…
Interferometric Imaging, and Beam-Formed Study of a Moving Type-IV Radio Burst with LOFAR
Kumari, Anshu; Zucca, Pietro; Kim, Sujin +6 more
Type-IV radio bursts have been studied for over 50 years. However, the specifics of the radio emission mechanisms is still an open question. In order to provide more information about the emission mechanisms, we studied a moving Type-IV radio burst with fine structures (spike group) by using the high-resolution capability of the Low-Frequency Arra…
A multiwavelength study of the H II region G347.600 + 00.211 and its effects on the surrounding medium
Molina Lera, J. A.; Gamen, R.; Cichowolski, S. +3 more
We present a multiwavelength investigation of the H II region G347.600+00.211, located at a distance of 7.9 kpc. We analyse the gas and dust properties aiming to disentangle the origin of the region as well as its role in the formation of new stars. G347.600 + 00.211 is very conspicuous at 1420 MHz and infrared wavelengths, showing an incomplete s…