IIA Institutional Repository: Recent submissions

  • Low-frequency quasi-periodic oscillations and shocks in accretion on to black hole 
    Singh, Chandra B; Mondal, Santanu; Garofalo, David (Oxford University Press on behalf of Royal Astronomical Society, 2022-02)
    Low-frequency quasi-periodic oscillations (LFQPOs) have been routinely observed in black hole X-ray binaries (BHXRBs). These LFQPOs can be explained by axisymmetric shock oscillation in accretion flow around a rotating ...
  • Galactic H II region IRAS 17149 - 3916 - a multiwavelength study 
    Potdar, Ajay; Das, Swagat R; Issac, Namitha; Tej, Anandmayee; Vig, Sarita; Chandra, C. H. Ishwara (Oxford University Press on behalf of Royal Astronomical Society, 2022-02)
    This paper presents a multiwavelength investigation of the Galactic H ii region IRAS 17149 − 3916. Using the Giant Meterwave Radio Telescope, India, first low-frequency radio continuum observations at 610 and 1280 MHz for ...
  • The Black Hole-Galaxy Connection: Interplay between Feedback, Obscuration, and Host Galaxy Substructure 
    Juneau, Stephanie; Goulding, Andy D; Banfield, Julie; Bianchi, Stefano; Duc, Pierre-Alain; Ho, I. -Ting; Dopita, Michael A; Scharwächter, Julia; Bauer, Franz E; Groves, Brent; Alexander, David M; Davies, Rebecca L; Elbaz, David; Freeland, Emily; Hampton, Elise; Kewley, Lisa J; Nikutta, Robert; Shastri, Prajval; Shu, Xinwen; Vogt, Frederic P. A; Wang, Tao; Wong, O. Ivy; Woo, Jong-Hak (American Astronomical Society, 2022-02-01)
    There is growing evidence for physical influence between supermassive black holes and their host galaxies. We present a case study of the nearby galaxy NGC 7582, for which we find evidence that galactic substructure plays ...
  • SN 2020sck: Deflagration in a Carbon-Oxygen White Dwarf 
    Dutta, Anirban; Sahu, D. K; Anupama, G. C; Joharle, Simran; Kumar, Brajesh; Nayana, A. J; Singh, Avinash; Kumar, Harsh; Bhalerao, Varun; Barway, Sudhanshu (American Astronomical Society, 2022-02-01)
    We present optical UBVRI photometry and low-to-medium resolution spectroscopic observations of type Iax supernova SN 2020sck spanning −5.5 days to +67 days from maximum light in the B-band. From the photometric analysis ...
  • A Comprehensive Study of the Young Cluster IRAS 05100+3723: Properties, Surrounding Interstellar Matter, and Associated Star Formation 
    Yadav, R. K; Samal, M. R; Semenko, E; Zavagno, A; Vaddi, S; Prajapati, P; Ojha, D. K; Pandey, A. K; Ridsdill-Smith, M; Jose, J; Patra, S; Dutta, S; Irawati, P; Sharma, S; Sahu, D. K; Panwar, N (American Astronomical Society, 2022-02-10)
    We present a comprehensive multiwavelength investigation of a likely massive young cluster "IRAS 05100+3723" and its environment with the aim to understand its formation history and feedback effects. We find that IRAS ...
  • New Results from the Spectral Observations of Solar Coronal Type II Radio Bursts 
    Ramesh, R; Kathiravan, C; Natarajan, S. S (American Astronomical Society, 2022-02-10)
    We carried out a statistical study of twenty-six type II radio bursts from the Sun observed with the Gauribidanur Low-frequency Solar Spectrograph in the frequency range 85–35 MHz during the period 2009–2019. Our results ...
  • The ALMaQUEST Survey. VII. Star Formation Scaling Relations of Green Valley Galaxies 
    Lin, Lihwai; Ellison, Sara L; Pan, Hsi-An; Thorp, Mallory D; Yu, Po-Chieh; Belfiore, Francesco; Hsieh, Bau-Ching; Maiolino, Roberto; Ramya, S; Sanchez, Sebastian F; Su, Yung-Chau (American Astronomical Society, 2022-02-20)
    We utilize the ALMA-MaNGA QUEnch and STar formation (ALMaQUEST) survey to investigate the kpc-scale scaling relations, presented as the resolved star-forming MS (rSFMS: ΣSFR versus Σ*), the resolved Schmidt–Kennicutt ...
  • ALMA Survey of Orion Planck Galactic Cold Clumps (ALMASOP): A Hot Corino Survey toward Protostellar Cores in the Orion Cloud 
    Hsu, Shih-Ying; Liu, Sheng-Yuan; Liu, Tie; Sahu, Dipen; Lee, Chin-Fei; Tatematsu, Kenichi; Kim, Kee-Tae; Hirano, Naomi; Yang, Yao-Lun; Johnstone, Doug; Liu, Hongli; Juvela, Mika; Bronfman, Leonardo; Chen, Huei-Ru Vivien; Dutta, Somnath; Eden, David J; Jhan, Kai-Syun; Kuan, Yi-Jehng; Lee, Chang Won; Lee, Jeong-Eun; Li, Shanghuo; Liu, Chun-Fan; Qin, Sheng-Li; Sanhueza, Patricio; Shang, Hsien; Archana Soam; Traficante, Alessio; Zhou, Jianjun (American Astronomical Society, 2022-03-10)
    The presence of complex organic molecules (COMs) in the interstellar medium is of great interest since it may link to the origin and prevalence of life in the universe. Aiming to investigate the occurrence of COMs and their ...
  • The 1.28 GHz MeerKAT Galactic Center Mosaic 
    Heywood, I; Rammala, I; Camilo, F; Cotton, W. D; Yusef-Zadeh, F; Abbott, T. D; Adam, R. M; Adams, G; Aldera, M. A; Asad, K. M. B; Bauermeister, E. F; Bennett, T. G. H; Bester, H. L; Bode, W. A; Botha, D. H; Botha, A. G; Brederode, L. R. S; Buchner, S; Burger, J. P; Cheetham, T; de Villiers, D. I. L; Dikgale-Mahlakoana, M. A; du Toit, L. J; Esterhuyse, S. W. P; Fanaroff, B. L; February, S; Fourie, D. J; Frank, B. S; Gamatham, R. R. G; Geyer, M; Goedhart, S; Gouws, M; Gumede, S. C; Hlakola, M. J; Hokwana, A; Hoosen, S. W; Horrell, J. M. G; Hugo, B; Isaacson, A. I; Jozsa, G. I. G; Jonas, J. L; Joubert, A. F; Julie, R. P. M; Kapp, F. B; Kenyon, J. S; Kotze, P. P. A; Kriek, N; Kriel, H; Krishnan, V. K; Lehmensiek, R; Liebenberg, D; Lord, R. T; Lunsky, B. M; Madisa, K; Magnus, L. G; Mahgoub, O; Makhaba, A; Makhathini, S; Malan, J. A; Manley, J. R; Marais, S. J; Martens, A; Mauch, T; Merry, B. C; Millenaar, R. P; Mnyandu, N; Mokone, O. J; Monama, T. E; Mphego, M. C; New, W. S; Ngcebetsha, B; Ngoasheng, K. J; Ockards, M. T; Oozeer, N; Otto, A. J; Passmoor, S. S; Patel, A. A; Peens-Hough, A; Perkins, S. J; Ramaila, A. J. T; Ramanujam, N. M. R; & 30 Co-authors (American Astronomical Society, 2022-02-01)
    The inner ∼200 pc region of the Galaxy contains a 4 million M⊙ supermassive black hole (SMBH), significant quantities of molecular gas, and star formation and cosmic-ray energy densities that are roughly two orders of ...
  • B-fields in Star-forming Region Observations (BISTRO): Magnetic Fields in the Filamentary Structures of Serpens Main 
    Kwon, Woojin; Pattle, Kate; Sadavoy, Sarah; Hull, Charles L. H; Johnstone, Doug; Ward-Thompson, Derek; Francesco, James Di; Koch, Patrick M; Furuya, Ray; Doi, Yasuo; Le Gouellec, Valentin J. M; Hwang, Jihye; Lyo, A. -Ran; Archana Soam; & 138 Co-authors (American Astronomical Society, 2022-02-20)
    We present 850 μm polarimetric observations toward the Serpens Main molecular cloud obtained using the POL-2 polarimeter on the James Clerk Maxwell Telescope as part of the B-fields In STar-forming Region Observations ...
  • Polarization of Rotationally Oblate Self-luminous Exoplanets with Anisotropic Atmospheres 
    Chakrabarty, Aritra; Sengupta, S; Marley, Mark S (American Astronomical Society, 2022-03-01)
    The young self-luminous giant exoplanets are expected to be oblate in shape, owing to the high rotational speeds observed for some objects. Similar to the case of brown dwarfs, the thermal emission from these planets should ...
  • Investigating the Observational Properties of Type Ib Supernova SN 2017iro 
    Kumar, Brajesh; Singh, Avinash; Sahu, D. K; Anupama, G. C (American Astronomical Society, 2022-03-01)
    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 ...
  • Magnetic Imprints of Eruptive and Noneruptive Solar Flares as Observed by Solar Dynamics Observatory 
    Vasantharaju, N; Vemareddy, P; Ravindra, B; Doddamani, V. H (American Astronomical Society, 2022-03-01)
    The abrupt and permanent changes of the photospheric magnetic field in the localized regions of active regions during solar flares, called magnetic imprints (MIs), have been observed for nearly the past three decades. The ...
  • Eruption of the EUV Hot Channel from the Solar Limb and Associated Moving Type IV Radio Burst 
    Vemareddy, P; Demoulin, P; Sasikumar Raja, K; Zhang, J; Gopalswamy, N; Vasantharaju, N (American Astronomical Society, 2022-03-01)
    Using the observations from the Solar Dynamics Observatory, we study an eruption of a hot-channel flux rope (FR) near the solar limb on 2015 February 9. The pre-eruptive structure is visible mainly in EUV 131 Å images, ...
  • On the Application of the Equal-contrast Technique to Ca-K Data from Kodaikanal and Other Observatories 
    Singh, J; Priyal, Muthu; Ravindra, B; Bertello, Luca; Pevtsov, Alexei A (American Astronomical Society, 2022-03-10)
    The "equal-contrast technique" (ECT) methodology, developed by Singh et al. to generate uniform long time series of Ca-K images obtained during the 20th century from the Kodaikanal Observatory (KO), improved the correlation ...
  • On the Variation in the Volumetric Evolution of CMEs from the Inner to Outer Corona 
    Majumdar, Satabdwa; Patel, Ritesh; Pant, Vaibhav (American Astronomical Society, 2022-04-10)
    Some of the major challenges faced in understanding the early evolution of coronal mass ejections (CMEs) are due to the limited observations in the inner corona (<3 R⊙) and the plane-of-sky measurements. In this work, we ...
  • Unveiling an Old Disk around a Massive Young Leaking Blueberry in SDSS-IV MaNGA 
    Paswan, Abhishek; Saha, Kanak; Borgohain, Anshuman; Leitherer, Claus; Dhiwar, Suraj (American Astronomical Society, 2022-04-10)
    Extreme emission-line galaxies, such as blue compact dwarfs (BCDs), Green Peas (GPs), and blueberries in the local universe are potential candidates for understanding the nature of galaxies that reionized the early universe. ...
  • Line Profile Studies of Coronal Active Regions in Fe XII λ195.12 Using Hinode/EIS 
    Prabhakar, Maya; Raju, K. P (American Astronomical Society, 2022-05-20)
    Coronal active regions are studied using Hinode/EIS observations in the EUV line Fe xii λ195.12 by analyzing their line profiles from 2006 December to 2019 December. The period covers the last 2 yr of solar cycle 23 and ...
  • Grain Alignment in the Circumstellar Shell of IRC+10° 216 
    Andersson, B. -G; Lopez-Rodriguez, Enrique; Medan, Ilija; Archana Soam; Hoang, Thiem; Vaillancourt, John E; Lazarian, Alex; Sandin, Christer; Mattsson, Lars; Tahani, Mehrnoosh (American Astronomical Society, 2022-06-01)
    Dust-induced polarization in the interstellar medium (ISM) is due to asymmetric grains aligned with an external reference direction, usually the magnetic field. For both the leading alignment theories, the alignment of the ...
  • Evolution of a Peculiar Type Ibn Supernova SN 2019wep 
    Gangopadhyay, A; Misra, Kuntal; Hosseinzadeh, Griffin; Arcavi, Iair; Pellegrino, Craig; Wang, Xiaofeng; Andrew Howell, D; Burke, Jamison; Zhang, Jujia; Kawabata, Koji; Singh, Mridweeka; Dastidar, Raya; Hiramatsu, Daichi; McCully, Curtis; Mo, Jun; Chen, Zhihao; Xiang, Danfeng (American Astronomical Society, 2022-05-10)
    We present a high-cadence short term photometric and spectroscopic monitoring campaign of a type Ibn SN 2019wep, which is one of the rare SN Ibn after SNe 2010al and 2019uo to display signatures of flash ionization (He ii, ...

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