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  • Vemareddy, P (Oxford University Press on behalf of Royal Astronomical Society, 2022-10)
    Using time-sequence vector magnetic field and coronal observations from Solar Dynamics Observatory, we report the observations of the magnetic field evolution and coronal activity in four emerging active regions (ARs). ...
  • Yao, Yuhan; Ho, Anna Y. Q; Medvedev, Pavel; Nayana, A. J; Perley, Daniel A; Kulkarni, S. R; Chandra, Poonam; Sazonov, Sergey; Gilfanov, Marat; Khorunzhev, Georgii; Khatami, David K; Sunyaev, Rashid (American Astronomical Society, 2022-08-01)
    We present AT2020mrf (SRGe J154754.2+443907), an extra-galactic (z = 0.1353) fast blue optical transient (FBOT) with a rise time of tg,rise = 3.7 days and a peak luminosity of Mg,peak = −20.0. Its optical spectrum ...
  • Swastik, C; Banyal, R. K; Narang, Mayank; Manoj, P; Sivarani, T; Rajaguru, S. P; Athira Unni; Banerjee, Bihan (American Astronomical Society, 2022-08-01)
    The imprints of stellar nucleosynthesis and chemical evolution of the galaxy can be seen in different stellar populations, with older generation stars showing higher α-element abundances and the later generations ...
  • Shejeelammal, J; Goswami, A (American Astronomical Society, 2022-08-01)
    Elemental abundances of extrinsic carbon stars provide insight into the poorly understood origin and evolution of elements in the early Galaxy. In this work, we present the results of a detailed spectroscopic analysis of ...
  • Nayana, A. J; Chandra, Poonam; Krishna, Anoop; Anupama, G. C (American Astronomical Society, 2022-08-01)
    We present extensive radio monitoring of a Type IIb supernova (SN IIb), SN 2016gkg during t ∼ 8−1429 days postexplosion at frequencies ν ∼ 0.33−25 GHz. The detailed radio light curves and spectra are broadly consistent with ...
  • Sharma, Ravi Kumar; Pandey, Kanhaiya L; Das, Subinoy (American Astronomical Society, 2022-08-01)
    Recently there have been reports of finding a lower bound on the neutrino mass parameter (Σmν) when using the Atacama Cosmology Telescope (ACT) and SPTpol data; however, these bounds on the Σmν are still weaker for most ...
  • Das, Santabrata; Nandi, Anuj; Stalin, C. S; Rakshit, Suvendu; Dihingia, Indu Kalpa; Singh, Swapnil; Aktar, Ramiz; Mitra, Samik (Oxford University Press on behalf of Royal Astronomical Society, 2022-08)
    We study the relativistic, inviscid, advective accretion flow around the black holes and investigate a key feature of the accretion flow, namely the shock waves. We observe that the shock-induced accretion solutions are ...
  • Joshi, Jayant; Rouppe van der Voort, Luc H. M (EDP Sciences, 2022-08)
    Context. Magnetic reconnection in the deep solar atmosphere can give rise to enhanced emission in the Balmer hydrogen lines, a phenomenon referred to as Ellerman bombs. Recent high-quality Hβ observations indicate that ...
  • Li, Pak Shing; Lopez-Rodriguez, Enrique; Archana Soam; Klein, Richard I (Oxford University Press on behalf of Royal Astronomical Society, 2022-08)
    We present the stability analysis of two regions, OMC-3 and OMC-4, in the massive and long molecular cloud complex of Orion A. We obtained 214 μm HAWC + /SOFIA polarization data, and we make use of archival data for the ...
  • Ankit Kumar; Kataria, Sandeep Kumar (Oxford University Press on behalf of Royal Astronomical Society, 2022-08)
    Cosmological simulations predict more classical bulges than their observational counterparts in the local Universe. Here, we quantify evolution of the bulges since z = 0.1 using photometric parameters of nearly 39 000 ...
  • Valtonen, Mauri J; Dey, Lankeswar; Zola, S; Ciprini, S; Kidger, M; Pursimo, T; Gopakumar, A; Matsumoto, K; Sadakane, K; Caton, D. B; Nilsson, K; Komossa, S; Bagaglia, M; Baransky, A; Boumis, P; Boyd, D; Castro-Tirado, A. J; Debski, B; Drozdz, M; Perez, A. Escartin; Fiorucci, M; Garcia, F; Gazeas, K; Ghosh, S; Godunova, V; Gomez, J. L; Gredel, R; Grupe, D; Haislip, J. B; Henning, T; Hurst, G; Janík, J; Kouprianov, V. V; Lehto, H; Liakos, A; Mathur, S; Mugrauer, M; Nogues, R. Naves; Nucciarelli, G; Ogloza, W; Ojha, D. K; Pajdosz-Śmierciak, U; Pascolini, S; Poyner, G; Reichart, D. E; Rizzi, N; Roncella, F; Sahu, D. K; Sillanpää, A; Simon, A; Siwak, M; Alfaro, F. C. Soldán; Sonbas, E; Tosti, G; Vasylenko, V; Webb, J. R; Zielinski, P (Oxford University Press on behalf of Royal Astronomical Society, 2022-08)
    OJ 287 is a BL Lacertae type quasar in which the active galactic nucleus (AGN) outshines the host galaxy by an order of magnitude. The only exception to this may be at minimum light when the AGN activity is so low that ...
  • Jiang, Ji-an; Yasuda, Naoki; Maeda, Keiichi; Tominaga, Nozomu; Doi, Mamoru; Ivezic, Zeljko; Yoachim, Peter; Uno, Kohki; Moriya, Takashi J; Kumar, Brajesh; Pan, Yen-Chen; Tanaka, Masayuki; Tanaka, Masaomi; Nomoto, Kenichi; Jha, Saurabh W; Ruiz-Lapuente, Pilar; Jones, David; Shigeyama, Toshikazu; Suzuki, Nao; Kokubo, Mitsuru; Furusawa, Hisanori; Miyazaki, Satoshi; Connolly, Andrew J; Sahu, D. K; Anupama, G. C (IOP Publishing, 2022-07-10)
    In this Letter, we report the discovery of an ultraluminous fast-evolving transient in rest-frame UV wavelengths, MUSSES2020J, soon after its occurrence by using the Hyper Suprime-Cam (HSC) mounted on the 8.2 m Subaru ...
  • Bhattacharyya, Suman; Mathew, Blesson; Ezhikode, Savithri H; Muneer, S; Selvakumar, G; Maheswar, G; Arun, R; Anilkumar, Hema; Banerjee, Gourav; Kumar, S. P; Kartha, Sreeja S; Paul, KT; Velu, C (IOP Publishing, 2022-07-10)
    We present a follow-up study on the recent detection of two X-ray flaring events by MAXI/Gas Slit Camera observations in soft and hard X-rays from MAXI J0709–159 in the direction of HD 54786 (LY CMa), on 2022 January 25. ...
  • Yang, Xiaolong; Ji, Jialu; Joshi, Ravi; Yang, Jun; An, Tao; Wang, Ran; Ho, Luis C; Roberts, David H; Saripalli, Lakshmi (IOP Publishing, 2022-07-01)
    X-shaped radio galaxies (XRGs) are those that exhibit two pairs of unaligned radio lobes (main radio lobes and wings). One of the promising models for the peculiar morphology is jet reorientation. To clarify this, we ...
  • Zhao, Junwei; Rajaguru, S. P; Chen, Ruizhu (IOP Publishing, 2022-07-01)
    A set of 464 minutes of high-resolution high-cadence observations were acquired for a region near the Sun's disk center using the Interferometric BI-dimensional Spectrometer installed at the Dunn Solar Telescope. Ten sets ...
  • Agarwal, A; Pandey, Ashwani; Ozdonmez, Aykut; Ege, Ergun; Avik, Kumar Das; Volkan, Karakulak (IOP Publishing, 2022-07-01)
    We report the results from our study of the blazar S5 1803+784 carried out using quasi-simultaneous B, V, R, and I observations from 2020 May to 2021 July on 122 nights. Our observing campaign detected a historically bright ...
  • Suryanarayana, G. S (Elsevier, 2022-07-01)
    Active region (AR) flux is released in the form of flares and Coronal Mass Ejections and a host of several other energetic events. The development of an AR is an indication of the accumulation of flux which reflects the ...
  • Sahu, Snehalata; Subramaniam, A; Singh, Gaurav; Yadav, Ramakant; Valcarce, Aldo R; Choudhury, Samyaday; Sharmila Rani; Deepthi, S. Prabhu; Chung, Chul; Cote, Patrick; Leigh, Nathan; Geller, Aaron M; Chatterjee, Sourav; Kameswara Rao, N; Bandyopadhyay, Avrajit; Shara, Michael; Dalessandro, Emanuele; Pandey, G; Postma, Joesph E; Hutchings, John; Simunovic, Mirko; Stetson, Peter B; Sivarani, T; Puzia, Thomas; Sohn, Young-Jong (Oxford University Press on behalf of the Royal Astronomical Society, 2022-07)
    We present the first results of eight globular clusters (GCs) from the AstroSat/UVIT Legacy Survey programme GlobULeS based on the observations carried out in two far-ultraviolet (FUV) filters (F148W and F169M). The ...
  • Guha, Labanya Kumar; Srianand, Raghunathan; Dutta, Rajeshwari; Joshi, Ravi; Noterdaeme, Pasquier; Petitjean, Patrick (Oxford University Press on behalf of Royal Astronomical Society, 2022-07)
    From a sample of 109 candidate ultrastrong Mg II (USMg II; having rest equivalent width of Mg II, W2796 > 3.0 Å) systems at z = 0.4–0.6, we confirm 27 and identify host galaxies of 20 systems based on associated nebular ...
  • Meenakshi, P; Goswami, A; Shejeelammal, J; Sonamben, Mayani; Pawar, Ganesh; Mkrtichian, David; Doddamani, Vijayakumar H; Joshi, Santosh (Oxford University Press on behalf of Royal Astronomical Society, 2022-07)
    We present the results of the high-resolution (R ∼ 60 000) spectroscopic analysis of the star LAMOSTJ045019.27 + 394758.7 (hereafter J045) from the list of carbon stars of LAMOST DR2. From our analysis, we find that J045 ...

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