IIA Institutional Repository: Recent submissions

  • Bengaluru’s IIA built tech that’ll go closest ever to peer at Sun 
    The Times of India (The Times of India, 2023-09-02)
  • SN 2018gj: A Short Plateau Type II Supernova with Persistent Blueshifted Ha Emission 
    Teja, Rishabh Singh; Singh, Avinash; Sahu, D. K; Anupama, G. C; Kumar, Brajesh; Nakaoka, Tatsuya; Kawabata, Koji S; Yamanaka, Masayuki; Takey, Ali; Kawabata, Miho (American Astronomical Society, 2023-09-10)
    We present an extensive, panchromatic photometric (UV, optical, and near-IR) and low-resolution optical spectroscopic coverage of a Type IIP supernova SN 2018gj that occurred on the outskirts of the host galaxy NGC 6217. ...
  • Field blue straggler stars: discovery of white dwarf companions to blue metal-poor stars using UVIT/AstroSat 
    Panthi, Anju; Subramaniam, A; Vaidya, Kaushar; Jadhav, Vikrant V; Sharmila Rani; Sivarani, T; Pandey, Sindhu (Oxford University Press on behalf of Royal Astronomical Society, 2023-10)
    Blue metal-poor (BMP) stars are the main-sequence stars that appear bluer and more luminous than normal turn-off stars of metal-poor globular clusters. They are believed to be either field blue straggler stars (FBSS) formed ...
  • Decoding the compositions of four bright r-process-enhanced stars 
    Saraf, Pallavi; Prieto, Carlos Allende; Sivarani, T; Bandyopadhyay, A; Beers, Timothy C.; Susmitha, A (Oxford University Press on behalf of Royal Astronomical Society, 2023-10)
    There has been a concerted effort in recent years to identify the astrophysical sites of the r-process that can operate early in the galaxy. The discovery of many r-process-enhanced (RPE) stars (especially by the R-process ...
  • Spectroscopic study of Herbig Ae/Be stars in the Galactic anti-centre region from LAMOST DR5 
    Nidhi, S; Mathew, Blesson; Shridharan, B; Arun, R; Anusha, R; Kartha, Sreeja S (Oxford University Press on behalf of Royal Astronomical Society, 2023-10)
    We study a sample of 119 Herbig Ae/Be stars in the Galactic anti-centre direction using the spectroscopic data from large sky area multi-object fiber spectroscopic telescope survey program. Emission lines of hydrogen ...
  • Far-ultraviolet to Near-infrared Observations of SN 2023ixf: A High-energy Explosion Engulfed in Complex Circumstellar Material 
    Teja, Rishabh Singh; Singh, Avinash; Basu, Judhajeet; Anupama, G. C; Sahu, D. K; Dutta, Anirban; Swain, Vishwajeet; Nakaoka, Tatsuya; Pathak, Utkarsh; Bhalerao, Varun; Barway, Sudhanshu; Kumar, Harsh; Nayana, A. J; Imazawa, Ryo; Kumar, Brajesh; Kawabata, Koji S (American Astronomical Society, 2023-09-01)
    We present early-phase panchromatic photometric and spectroscopic coverage spanning the far-ultraviolet to near-infrared regime of the nearest hydrogen-rich core-collapse supernova (SN) in the last 25 yr, SN 2023ixf. We ...
  • Precise Transit Photometry Using TESS: Updated Physical Properties for 28 Exoplanets around Bright Stars 
    Saha, Suman (American Astronomical Society, 2023-09)
    The Transiting Exoplanet Survey Satellite (TESS) follow-up of a large number of known transiting exoplanets provides a unique opportunity to study their physical properties more precisely. Being a space-based telescope, ...
  • Post-outburst Evolution of Bona Fide FU Ori-type V2493 Cygnus: A Spectro-photometric Monitoring 
    Ghosh, Arpan; Sharma, Saurabh; Ninan, Joe P; Ojha, Devendra K; Bhatt, B. C; Sahu, D. K; Baug, Tapas; Yadav, R. K; Irawati, Puji; Gour, A. S; Panwar, Neelam; Pandey, Rakesh; Sinha, Tirthendu; Verma, Aayushi (American Astronomical Society, 2023-09-01)
    We present here the results of 8 yr of our near-simultaneous optical–near-infrared spectro-photometric monitoring of the bona fide FU Ori (FUor)-type candidate V2493 Cygnus (V2493 Cyg) starting from 2013 September to 2021 ...
  • Age Distribution of Exoplanet Host Stars: Chemical and Kinematic Age Proxies from GAIA DR3 
    Swastik, C; Banyal, R. K; Narang, Mayank; Unni, Athira; Banerjee, Bihan; Manoj, P; Sivarani, T (American Astronomical Society, 2023-09-01)
    The GAIA space mission is impacting astronomy in many significant ways by providing a uniform, homogeneous, and precise data set for over 1 billion stars and other celestial objects in the Milky Way and beyond. Exoplanet ...
  • Nonthermal warm dark matter limits from small-scale structure 
    Banerjee, Arka; Das, Subinoy; Maharana, Anshuman; Nadler, Ethan O.; Sharma, Ravi Kumar (American Physical Society, 2023-08-15)
    We present small-scale structure constraints on sterile dark matter produced from a heavy mediator particle, inspired by models of moduli decay. Dark matter particles produced through this mechanism can contribute to the ...
  • On the propagation of gravity waves in the lower solar atmosphere in different magnetic configurations 
    Kumar, Hirdesh; Kumar, Brajesh; Rajaguru, S. P (Elsevier B.V, 2023-09-01)
    Gravity waves are generated by turbulent subsurface convection overshooting or penetrating locally into a stably stratified medium. While propagating energy upwards, their characteristic negative phase shift over height ...
  • The magnetic fields around the cometary globules L328, L323, and L331 
    Kumar, Siddharth; Archana Soam; Roy, Nirupam (Oxford University Press on behalf of Royal Astronomical Society, 2023-09)
    This work presents the magnetic field geometry in a complex of three cometary (with head–tail morphology) globules, namely LDN 323, LDN 328, and LDN 331, using R-band polarization measurements of background stars. These ...
  • Photometric variability of blue straggler stars in M67 with TESS and K2 
    Vernekar, Nagaraj; Subramaniam, A; Jadhav, Vikrant V; Bowman, Dominic M (Oxford University Press on behalf of Royal Astronomical Society, 2023-09)
    Blue straggler stars (BSSs) are formed through mass transfers or mergers in binaries. The recent detections of white dwarf (WD) companions to BSSs in M67 suggested a mass transfer pathway of formation. In search of a close ...
  • Observational Properties of a Bright Type lax SN 2018cni and a Faint Type Iax SN 2020kyg 
    Singh, Mridweeka; Sahu, D. K; Dastidar, Raya; Barna, Barnabas; Misra, Kuntal; Gangopadhyay, Anjasha; Howell, D. Andrew; Jha, Saurabh W.; Im, Hyobin; Taggart, Kirsty; Andrews, Jennifer; Hiramatsu, Daichi; Teja, Rishabh Singh; Pellegrino, Craig; Foley, Ryan J.; Joshi, Arti; Anupama, G. C; Bostroem, K. Azalee; Burke, Jamison; Camacho-Neves, Yssavo; Dutta, Anirban; Kwok, Lindsey A.; McCully, Curtis; Pan, Yen-Chen; Siebert, Matt; Srivastav, Shubham; Szalai, Tamás; Swift, Jonathan J.; Yang, Grace; Zhou, Henry; DiLullo, Nico; Scheer, Jackson (American Astronomical Society, 2023-08-10)
    We present the optical photometric and spectroscopic analysis of two Type Iax supernovae (SNe), 2018cni and 2020kyg. SN 2018cni is a bright Type Iax SN (MV,peak = −17.81 ± 0.21 mag), whereas SN 2020kyg (MV,peak = −14.52 ± ...
  • Reconnection-generated Plasma Flows in the Quasi-separatrix Layer in Localized Solar Corona 
    Mondal, Sripan; Srivastava, Abhishek K; Mishra, S. K; Sangal, K; Kayshap, Pradeep; Guo, Yang; Pontin, David I; Uritsky, Vadim M; Ofman, Leon; Wang, Tongjiang; Yuan, Ding (American Astronomical Society, 2023-08-10)
    Multiwavelength observations of the propagating disturbances (PDs), discovered by Atmospheric Imaging Assembly (AIA) on board Solar Dynamics Observatory (SDO), are analyzed to determine their driving mechanism and physical ...
  • UOCS X. Rich collection of post-mass-transfer systems in NGC 6791 
    Jadhav, Vikrant V; Subramaniam, A; Sagar, Ram (EDP Sciences, 2023-08)
    Aims. NGC 6791 is one of the richest old open clusters in the Milky Way. Its position above the Galactic plane and its number density make it an interesting middle ground between Galactic open and globular clusters. We aim ...
  • SN2019wxt: An Ultrastripped Supernova Candidate Discovered in the Electromagnetic Follow-up of a Gravitational Wave Trigger 
    Shivkumar, Hinna; Jaodand, Amruta D.; Balasubramanian, Arvind; Fremling, Christoffer; Corsi, Alessandra; Tzanidakis, Anastasios; Nissanke, Samaya; Kasliwal, Mansi; Brightman, Murray; Raaijmakers, Geert; Madsen, Kristin Kruse; Harrison, Fiona; Carbone, Dario; Nayana, A. J; Désert, Jean-Michel; Andreoni, Igor (American Astronomical Society, 2023-07-20)
    We present optical, radio, and X-ray observations of a rapidly evolving transient SN2019wxt (PS19hgw), discovered during the search for an electromagnetic counterpart to the gravitational-wave (GW) trigger S191213g. Although ...
  • The JCMT BISTRO Survey: Studying the Complex Magnetic Field of L43 
    Karoly, Janik; Ward-Thompson, Derek; Pattle, Kate; Berry, David; Whitworth, Anthony; Kirk, Jason; Bastien, Pierre; Ching, Tao-Chung; Coudé, Simon; Hwang, Jihye; Kwon, Woojin; Poidevin, Frédérick; Furuya, Ray; Robitaille, Jean-François; Loo, Sven van; Arzoumanian, Doris; Bourke, Tyler L.; Byun, Do-Young; Chen, Huei-Ru Vivien; Chen, Wen Ping; Chen, Mike; Kim, Hyosung; Chen, Zhiwei; Cho, Jungyeon; Gledhill, Tim; Choi, Minho; Choi, Youngwoo; Choi, Yunhee; Chrysostomou, Antonio; Chung, Eun Jung; Dai, Sophia; Debattista, Victor; Nakamura, Fumitaka; Francesco, James Di; Diep, Pham Ngoc; Doi, Yasuo; Graves, Sarah; Duan, Hao-Yuan; Duan, Yan; Eswaraiah, Chakali; Fanciullo, Lapo; Fiege, Jason; Fissel, Laura M.; Kirchschlager, Florian; Franzmann, Erica; Friberg, Per; Greaves, Jane; Griffin, Matt; Gu, Qilao; Han, Ilseung; Hoang, Thiem; Moriarty-Schieven, Gerald; Houde, Martin; Hull, Charles L. H; Kobayashi, Masato I. N; Inoue, Tsuyoshi; Inutsuka, Shu-ichiro; Iwasaki, Kazunari; Jeong, Il-Gyo; Johnstone, Doug; Könyves, Vera; Kang, Ji-hyun; Kang, Miju; Nagata, Tetsuya; Kataoka, Akimasa; Koch, Patrick M.; Kawabata, Koji; Kemper, Francisca; Kim, Jongsoo; Kim, Shinyoung; Kim, Gwanjeong; Kim, Kyoung Hee; Kim, Mi-Ryang; Kim, Kee-Tae; Kusune, Takayoshi; Kwon, Jungmi; Lacaille, Kevin; Law, Chi-Yan; Lee, Chang Won; Tang, Xindi; Lee, Hyeseung; Lee, Yong-Hee; Nakanishi, Hiroyuki; Lee, Chin-Fei; Lee, Jeong-Eun; Lee, Sang-Sung; Li, Dalei; Li, Di; Li, Guangxing; Li, Hua-bai; Hasegawa, Tetsuo; Lin, Sheng-Jun; Liu, Hong-Li; Liu, Tie; Ngoc, Nguyen Bich; Liu, Sheng-Yuan; Liu, Junhao; Longmore, Steven; Lu, Xing; Lyo, A-Ran; Mairs, Steve; Tomisaka, Kohji; Matsumura, Masafumi; Matthews, Brenda; Ohashi, Nagayoshi; Onaka, Takashi; Park, Geumsook; Parsons, Harriet; Peretto, Nicolas; Archana Soam; Priestley, Felix; Pyo, Tae-Soo; Tram, Le Ngoc; Qian, Lei; Rao, Ramprasad; Rawlings, Jonathan; Rawlings, Mark; Retter, Brendan; Richer, John; Rigby, Andrew; Sadavoy, Sarah; Wang, Jia-Wei; Saito, Hiro; Tsukamoto, Yusuke; Savini, Giorgio; Seta, Masumichi; Sharma, Ekta; Shimajiri, Yoshito; Shinnaga, Hiroko; Tahani, Mehrnoosh; Tamura, Motohide; Tang, Ya-Wen; Viti, Serena; Wang, Hongchi; Wu, Jintai; Xie, Jinjin; Yang, Meng-Zhe; Friesen, Rachel; Yen, Hsi-Wei; Yoo, Hyunju; Lai, Shih-Ping; Yuan, Jinghua; Yun, Hyeong-Sik; Zenko, Tetsuya; Zhang, Guoyin; Zhang, Yapeng; Zhang, Chuan-Peng; Zhou, Jianjun; Fuller, Gary; Zhu, Lei; Looze, Ilse de; André, Philippe; Qiu, Keping; Dowell, C. Darren; Eden, David; Eyres, Stewart; Falle, Sam; Gouellec, Valentin J. M. Le (American Astronomical Society, 2023-07-20)
    We present observations of polarized dust emission at 850 μm from the L43 molecular cloud, which sits in the Ophiuchus cloud complex. The data were taken using SCUBA-2/POL-2 on the James Clerk Maxwell Telescope as a part ...
  • Automated detection of double nuclei galaxies using GOTHIC and the discovery of a large sample of dual AGN 
    Bhattacharya, Anwesh; Nehal, C. P; Mousumi Das; Paswan, Abhishek; Saha, Snehanshu; Combes, Françoise (Oxford University Press on behalf of Royal Astronomical Society, 2023-09)
    We present a novel algorithm to detect double nuclei galaxies (DNG) called GOTHIC (Graph-bOosTed iterated HIll Climbing) – that detects whether a given image of a galaxy has two or more closely separated nuclei. Our aim ...
  • Spectral index variation across X-shaped radio galaxies 
    Patra, Dusmanta; Joshi, Ravi; Gopal-Krishna (Oxford University Press on behalf of Royal Astronomical Society, 2023-09)
    The formation mechanism of the enigmatic subclass of radio galaxies, called ‘X-shaped radio galaxies’ (XRGs), or ‘winged’ radio galaxies, which account for ∼10 per cent of the radio galaxy population, can be effectively ...

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