IIAP Publications: Recent submissions

  • Blue straggler in the making: An X-Ray active binary in Algol configuration 
    Sheikh, A. H; Medhi, B. J; Subramaniam, A; Messina, S; Das, Susmita; Sarkar, Hitendra; Bhardwaj, Anupam; Poro, Atila; Kounkel, Marina; Sagar, R (American Astronomical Society, 2026-05-01)
    We report an extremely rare X-ray active blue straggler star (BSS) in Collinder 261, undergoing ongoing Rochelobe overflow in a semidetached binary in an Algol-type configuration with an orbital period of Porb ∼ 2.112 days, ...
  • The broad-band spectral energy distribution of candidate neutrino blazars 
    Bharathan, Athira M; Stalin, C. S; Bottcher, M; Sahayanathan, S; Mathew, B; Bhattacharyya, Subir (Oxford University Press on behalf of Royal Astronomical Society, 2026-05)
    Blazars, the jet-dominated class of active galactic nuclei comprising flat-spectrum radio quasars (FSRQs) and BL Lacertae objects (BL Lacs), are now increasingly identified as potential sources of high-energy neutrinos. ...
  • Stellar astrophysics in the ultraviolet: Setting the scene 
    Fu, Xiaoting; Zanna, Giulio Del; Ji, Li; Geier, Stephan; Dorsch, Matti; Jadhav, Vikrant V; Sutaria, F. K; Li, Chengyuan; Parker, Quentin; Fang, Xuan (Springer Nature, 2026-06)
    The ultraviolet (UV) spectral domain occupies a unique position in stellar astrophysics, serving as the bridge between the thermal continuum of photospheres and the high-energy, non-thermal processes of stellar coronae and ...
  • Stellar contents and star formation in IRAS 18456-0223 
    Pandey, Nilesh; Kamath, U. S (Springer Nature, 2026-06)
    We use various analytical techniques to study Young Stellar Objects (YSOs) in an area of approximately 10'×10' in the IRAS 18456-0223 star-forming region. We use archival optical (Gaia DR3) and infrared (2MASS, UKIDSS, ...
  • SN 2023xgo: Helium-rich type Icn or carbon-flash type Ibn supernova? 
    Gangopadhyay, A; Sollerman, Jesper; Tsalapatas, Konstantinos; Maeda, K; Dukiya, Naveen; Schulze, Steve; Fransson, C; Sarin, Nikhil; Pessi, Priscila J; Singh, Mridweeka; Wise, Jacob L; Nakaoka, Tatsuya; Singh, Avinash; Dastidar, R; Kawabata, Miho; Qin, Yu-Jing; Das, Kaustav K.; Perley, Daniel A; Fremling, Christoffer; Taguchi, Kenta; Hinds, K. -Ryan; Lunnan, Ragnhild; Teja, Rishabh Singh; Dubey, Monalisa; Ailawadhi, Bhavya; Banerjee, Smaranika; Kawabata, K. S; Misra, K; Sahu, D. K; Brennan, S; Kasliwal, Mansi M; Ho, Anna Y. Q; Bochenek, Aleksandra; Rusholme, Ben; Laher, Russ R; Smith, Roger; Purdum, Josiah; Sravan, Niharika (Oxford University Press on behalf of Royal Astronomical Society, 2026-04)
    We present observations of SN 2023xgo, a transitional Type Ibn/Icn SN, from −5.6 to 63 d relative to r-band peak. Early spectra show C III λ5696 emission like Type Icn SNe, shifting to Type Ibn features. The He I velocities ...
  • The ALMA-QUARKS survey: Evidence of an explosive molecular outflow in IRAS 15520─5234 
    Hoque, Ariful; Baug, Tapas; Guzman, Estrella; Fernandez Lopez, Manuel; Liu, Tie; Garay, Guido; Goldsmith, Paul F; Xu, Feng-Wei; Tang, Xindi; Sanhueza, Patricio; Dewangan, Lokesh; Gupta, Shivani; Dib, S; Zapata, Luis A; Hwang, Jihye; Bhadari, Naval Kishor; Bally, J; Das, Swagat; Yang, A.Y; Gorai, Prasanta; Maity, Arup Kumar; Chibueze, J. O; Garcia, Pablo; Bronfman, Leonardo; Liu, Xunchuan; Tóth, L. Viktor; Usman, Shehu Muhammad; Kim, Kee-Tae (American Astronomical Society, 2026-04-20)
    We present a study of the massive protocluster IRAS 15520–5234, which displays evidence of an explosive molecular outflow that unleashed a kinetic energy of at least 1048 erg. The protocluster contains 16 dense cores ...
  • Improving accretion diagnostics for young stellar objects with mid-infrared hydrogen lines from JWST/MIRI 
    Shridharan, B; Manoj, P; Pathak, Vinod C; Caratti o Garatti, A; Banerjee, Bihan; Henning, Th; Kamp, I; van Dishoeck, E; Tyagi, Himanshu; Arun, R; Mathew, B; Güdel, M; Lagage, P.-O (EDP Sciences, 2026-04)
    Context. We present a comprehensive study of mid-infrared neutral hydrogen (H I) emission lines in 79 nearby (d < 200 pc) young stars using the James Webb Space Telescope (JWST) Mid-Infrared Instrument (MIRI). This work ...
  • Interstellar ultraviolet Lyα high resolution mapping from the new horizons P-Alice instrument 
    Becker, Tracy M; Gladstone, G. Randall; Parker, Joel Wm; Shull, J. Michael; Redfield, Seth; Ruetschle, Sarah; Cunningham, Nathaniel; Froning, Cynthia S; Kammer, Joshua A; Spencer, John R; Postman, Marc; Lauer, T. R; Murthy, J; Versteeg, Maarten H; Pineau, Jon P; Retherford, Kurt D; Verbiscer, Anne J; Brandt, Pontus; Singer, Kelsi N; Stern, S. Alan (American Astronomical Society, 2026-04)
    We present New Horizons Alice spectral observations of interstellar hydrogen Lyα emissions at a vantage point of 57 au from the Sun. The observations were conducted as a pair of orthogonal scans to produce high spatial angular ...
  • Λ(t)CDM model: Cosmological implications and dynamical system analysis 
    Chaudhary, Himanshu; Mandal, Ratul; Bashir, Masroor; Sharma, Vipin Kumar; Debnath, Ujjal (IOP Publishing, 2026-04)
    We investigated a time-varying cosmological constant model using recent BAO measurements from DESI DR2, combined with Type Ia supernova samples (Pantheon +, DES-Dovekie, and Union3) and CMB shift parameters, to constrain ...
  • Magnetic field disturbances in the martian ionosphere: Competing roles of ionospheric currents and solar wind interaction 
    Leelavathi, V; Rao, N. V; Pavan, D. G (Wiley on behalf of American Geophysical Union, 2026-04)
    We examine disturbances in the total magnetic field in the Martian ionosphere at altitudes of 150–1,000 km and investigate their potential sources, focusing on ionospheric density variations and solar wind dynamic pressure ...
  • B-fields and dust in interstellar filaments using dust polarization (BALLAD-POL). VI. grain alignment mechanisms in the massive quiescent filament G16.96+0.27 using dust polarization observations from JCMT/POL-2 
    Pravash, Saikhom; Hoang, Thiem; Archana Soam; Gu, Qi-Lao; Liu, Tie; Diep, Pham Ngoc; Tram, Le Ngoc; Ngoc, Nguyen Bich (American Astronomical Society, 2026-04)
    Dust polarization induced by aligned nonspherical grains acts as an important tool to trace the magnetic field (B-field) morphologies and strengths in molecular clouds and constrain grain properties and their alignment ...
  • Constraining the onset height of coronal mass ejection driven shocks using near-Sun observations in visible and radio wavelengths 
    Kathiravan, C; Priyal, M; Ramesh, R (Springer Nature, 2026-06)
    One of the debated issues about the onset of the type II radio bursts near the Sun is the heliocentric distance (r) at which the associated magnetohydrodynamic (MHD) shocks are formed, and the association of the latter ...
  • Memory effects and entanglement dynamics of finite time acceleration 
    Dubey, Nitesh K; Kolekar, Sanved (American Physical Society, 2026-04-15)
    We construct a smooth trajectory in Minkowski spacetime that is inertial in the asymptotic past and future but undergoes approximately uniform acceleration for a finite duration. In a suitable limit, this trajectory ...
  • Probing departures from ΛCDM by late-time datasets 
    Chaudhary, Himanshu; Sharma, Vipin Kumar; Capozziello, Salvatore; Mustafa, Ghulam (American Astronomical Society, 2026-04)
    Observational data play a pivotal role in identifying cosmological models that are both theoretically consistent and empirically viable. In this work, we investigate the level of preference for dynamical dark energy over ...
  • Non-Gaussian expansion of Minkowski tensors in redshift space 
    Appleby, S; Pichon, C; Pravabati, C; Pogosyan, Dmitri; Park, C (American Astronomical Society, 2026-04-20)
    This paper focuses on extending the use of Minkowski tensors to analyze anisotropic signals in cosmological data, focusing on those introduced by redshift space distortions. We derive the ensemble average of the two ...
  • The evolution of the reconnection flux during the eruption of magnetic flux ropes 
    Maity, Samriddhi Sankar; Chatterjee, Piyali; Sarkar, Ranadeep; Mytheen, Ijas S (American Astronomical Society, 2026-04-01)
    Coronal mass ejections (CMEs) are powerful drivers of space weather, with magnetic flux ropes (MFRs) widely regarded as their primary precursors. However, the variation in the reconnection (RC) flux during the evolution ...
  • SN 2017hcc and SN2023usc—A comparative spectroscopic study of type IIn supernovae 
    Sethulakshmi, V; Sutaria, F. K; Sharma, Riddhiman; Ray, A (American Astronomical Society, 2026-04-20)
    We report on a spectroscopic study of the bright, nearby type IIn supernovae SN 2017hcc and SN 2023usc using data obtained from the Himalayan Chandra Telescope. SN 2017hcc is a well-studied event, and our sampling covers ...
  • Stratification of the active galactic nucleus─driven multiphase outflows in the dwarf Seyfert galaxy NGC 4395 
    Nandi, Payel; Colina, Luis; Riffel, R. A; Pereira Santaella, Miguel; Stalin, C. S; Saikia, D. J; Álvarez-Márquez, Javier; Kissler-Patig, Markus (American Astronomical Society, 2026-04-20)
    We present a multiwavelength study of nuclear outflows in the nearby dwarf Seyfert galaxy NGC 4395, which hosts an intermediate-mass black hole. Using JWST/NIRSpec and MIRI integral-field-unit spectroscopy (1.66–28.6 ...
  • Fading echoes of interaction: Probing centuries of preexplosion mass loss in four type IIn supernovae 
    Hillenkamp, Elizabeth; Baer-Way, Raphael; Chandra, P; Sarangi, Arkaprabha; Chevalier, Roger; Nayana, A. J; Deutsch, Annika; Maeda, K; Smith, Nathan (American Astronomical Society, 2026-04-10)
    Supernovae characterized by enduring narrow optical hydrogen emission lines (SNe IIn) are believed to result primarily from the core-collapse of massive stars undergoing sustained interaction with a dense circumstellar ...
  • Understanding the formation and eruption of sigmoidal structure through data-driven modeling of magnetic evolution in solar active region 13500 
    Vemareddy, P; Nair, Sreejith S; Gosain, S (American Astronomical Society, 2026-04-10)
    We investigate the magnetic origin of the coronal mass ejection that occurred on 2023 November 28 at 19:50 UT from NOAA Active Region 13500 located near the solar disk center. The eruption was associated with an S-shaped ...

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