Motivated by the aim of producing significant number of primordial black holes, over the past few years, there has been a considerable interest in examining models of inflation involving a single, canonical field, that ...
Jafarzadeh, Shahin; Jess, David B.; Stangalini, Marco; Grant, Samuel D. T; Higham, Jonathan E; Pessah, Martin E; Keys, Peter H; Belov, Sergey; Calchetti, Daniele; Duckenfield, Timothy J; Fedun, Viktor; Fleck, Bernhard; Gafeira, Ricardo; Jefferies, Stuart M; Khomenko, Elena; Morton, Richard J; Norton, Aimee A; Rajaguru, S. P; Schiavo, Luiz A C. A; Sharma, Rahul; Silva, Suzana S. A; Solanki, Sami K; Steiner, Oskar; Verth, Gary; Vigeesh, G; Yadav, Nitin(Springer Nature, 2025-04)
This Primer provides an overview of a fundamental set of analysis methods for studying waves, vibrations and related oscillatory phenomena — including instabilities, turbulence and shocks — across diverse scientific fields. ...
Dileep, Athul; Joshi, Santosh; Lata, S; Lampens, P; De Cat, P; Zuniga-Fernandez, Sebastian; Mkrtichian, David; Pramod Kumar, S; Sarkar, M; Panchal, Alaxender; Joshi, Y. C; Rishi, C; Panwar, Neelam; Jain, Arjav; Rathore, Neeraj(Oxford University Press on behalf of Royal Astronomical Society, 2025-04)
Pulsating variables are prevalent in the classical δ Scuti instability strip of intermediate-age open star clusters. The cluster membership of these stars facilitates a comparative analysis of their evolution in analogous ...
Martocchia, S; Boselli, A; Maraston, C; Thomas, D; Boquien, M; Roehlly, Y; Fossati, Matteo; Seille, L. M; Amram, P; Boissier, S; Buat, V; Cote, Patrick; Cuillandre, J. C; Ferrarese, L; Gwyn, S; Hutchings, J; Junais; Morgan, C. R; Postma, J; Woods, T. E; Roediger, J; Subramaniam, A; Sun, M; Zhang, H. X(EDP Sciences, 2025-04)
We reconstructed the star formation histories of seven massive (M⋆ ≳ 1010 M⊙) early-type galaxies (ETGs) in the Virgo cluster by analysing their spatially resolved stellar population (SP) properties including their ultraviolet ...
Context. Bars are ubiquitously found in disc galaxies and they are known to drive galaxy evolution through secular processes. However, the specific contribution of the bars in the suppression of star formation is still a ...
Mishra, Dibya Kirti; Jha, Bibhuti K; Chatzistergos, Theodosios; Ermolli, Ilaria; Banerjee, D; Upton, Lisa A; Khan, M. Saleem(American Astronomical Society, 2025-04-01)
The Sun's polar magnetic field is pivotal in understanding solar dynamo processes and forecasting future solar cycles. However, direct measurements of the polar field have only been available since the 1970s. The chromospheric ...
Mishra, S. K; Srivastava, A. K; Rajaguru, S. P; Jelinek, P(American Astronomical Society, 2025-04-01)
We use data from the Atmospheric Imaging Assembly on board the Solar Dynamics Observatory to study the most likely formation of a forced reconnection region and associated plasma blobs, triggered by jetlike structures in ...
Studies for inferring the global characteristics of coronal mass ejections (CMEs) from multipoint local in situ observations have been undertaken previously, but limited studies have utilized measurements from multiple ...
Mathur, Harsh; Anusha, L. S; Agnihotri, Devang(American Astronomical Society, 2025-04-10)
The Ca i 4227 Å line is a strong resonance line formed in the solar chromosphere. At the limb, it produces the largest scattering polarization signal. So far, modeling the linear polarization in this line has been limited ...
Venkata Suresh, Narra; Sreekanth Reddy, V; Banyal, R. K; Prasad, B. R(Springer Nature, 2022-01-30)
Spatial resolution of the ground-based optical
telescopes is limited by the Earth’s atmospheric turbulence
rather than the size of the telescope aperture. To restore the
performance of a telescope to near diffraction ...
Recent high-resolution solar observations have unveiled the presence of small-scale loop-like structures in the lower solar atmosphere, often referred to as unresolved fine structures, low-lying loops, and miniature hot ...
While the subclass of interacting supernovae (SNe) with narrow hydrogen emission lines (Type IIn supernovae (SNe IIn)) consists of some of the longest-lasting and brightest supernovae (SNe) ever discovered, their progenitors ...
Reports using total solar eclipse data indicate that the 5303 Å emission line is a promising tool for observing the thermodynamic changes due to coronal mass ejections (CMEs) close to the Sun. The Visible Emission Line ...
Spicules have often been proposed as substantial contributors toward the mass and energy balance of the solar corona. While their transition region (TR) counterpart has unequivocally been established over the past decade, ...
Sule, A; Ramanujam, N. M; Maji, M; More, S; Yadav, V; Narayanan, A; Dhurde, S; Ganguly, J; Seetha, S; Srivastava, A. M; Shylaja, B. S; Wadadekar, Y(Springer Nature, 2025-06)
Astronomy, of all the sciences, is possibly the one with the most public appeal across all age groups. This is also evidenced by the existence of a large number of planetaria and amateur astronomy societies, which are ...
The exact sources of high-energy neutrinos detected by the IceCube neutrino observatory still remain a mystery. For the first time, this work explores the hypothesis that galaxy mergers may serve as sources for these ...
As one of the fundamental unknowns of our Universe, the mass of dark matter remains to be a topic of great interest. We consider the possibility of a time-variation of the dark matter mass. We study the cosmological ...
In the 1970s, Fulling, Davies, and Unruh demonstrated that the vacuum state perceived by an inertial observer in Minkowski space appears as a thermal bath to a uniformly accelerated observer. We explore the transformation ...
Srinivasaragavan, Gokul P; Perley, Daniel A; Ho, Anna Y. Q; O'Connor, Brendan; de Ugarte Postigo, A; Sarin, Nikhil; Cenko, S. Bradley; Sollerman, Jesper; Rhodes, Lauren; Green, D. A; Svinkin, Dmitry; Bhalerao, Varun; Waratkar, Gaurav; Nayana, A. J; Chandra, P; Miller, M. Coleman; Malesani, Daniele B; Ryan, Geoffrey; Srijan, Suryansh; Bellm, Eric C; Burns, Eric; Titterington, David J; Stone, Maria B; Purdum, Josiah; Ahumada, Tomas; Anupama, G. C; Barway, Sudhanshu; Coughlin, Michael W; Drake, Andrew J; Fender, Rob; Agui Fernandez, Jose F; Frederiks, Dmitry D; Geier, Stefan; Graham, Matthew J; Kasliwal, Mansi M; Kulkarni, S. R; Kumar, Harsh; Li, Maggie L; Laher, Russ R; Lysenko, Alexandra L; Parwani, Gopal; Perley, Richard A; Ridnaia, Anna V; Salgundi, Anirudh; Smith, Roger; Sravan, Niharika; Swain, Vishwajeet; Thone, C. C; Tsvetkova, Anastasia E; Ulanov, Mikhail V; Vail, Jada; Wise, Jacob L; Wold, Avery(Oxford University Press on behalf of Royal Astronomical Society, 2025-03)
We present multiwavelength analysis of ZTF23abelseb (AT 2023sva), an optically discovered fast-fading ( Δmr=2.2 mag in Δt=0.74 d), luminous ( Mr∼−30.0 mag), and red ( g−r=0.50 mag) transient at z=2.28 with accompanying ...
Polarization of starlight and thermal dust emission due to aligned non-spherical grains helps us to trace magnetic field (B-field) morphology in molecular clouds and to study grain alignment mechanisms. In this work, we ...