IIAP Publications: Recent submissions

  • Spectroscopic reverberation mapping of Quasar PKS 0736 + 017: broad-line region and black-hole mass 
    Pandey, Shivangi; Rakshit, Suvendu; Woo, Jong-Hak; Stalin, C. S (Oxford University Press on behalf of Royal Astronomical Society, 2022-10)
    To understand the mass distribution and co-evolution of supermassive black holes with their host galaxy, it is crucial to measure the black hole mass of AGN. Reverberation mapping is a unique tool to estimate the black ...
  • Influence of Thomson Electron Scattering Redistribution on Spectral Line Polarization Formed in Spherically Symmetric Extended and Expanding Atmospheres 
    Sampoorna, M; Megha, A; Supriya, H. D (American Astronomical Society, 2022-09-20)
    Scattering of line photons by ambient electrons in thermal motion in the stellar atmosphere modifies the wings of both intensity and linear polarization profiles of the spectral lines. The aim of the present paper is to ...
  • ATOMS: ALMA three-millimeter observations of massive star-forming regions – XII: Fragmentation and multiscale gas kinematics in protoclusters G12.42+0.50 and G19.88−0.53 
    Saha, Anindya; Tej, Anandmayee; Liu, Hong-Li; Liu, Tie; Issac, Namitha; Lee, Chang Won; Garay, Guido; Goldsmith, Paul F; Juvela, Mika; Qin, Sheng-Li; Stutz, Amelia; Li, Shanghuo; Wang, Ke; Baug, Tapas; Bronfman, Leonardo; Xu, Feng-Wei; Zhang, Yong; Eswaraiah, Chakali (Oxford University Press on behalf of Royal Astronomical Society, 2022-10)
    We present new continuum and molecular line data from the ALMA Three-millimeter Observations of Massive Star-forming regions (ATOMS) survey for the two protoclusters, G12.42+0.50 and G19.88−0.53. The 3 mm continuum maps ...
  • Li Distribution, Kinematics, and Detailed Abundance Analysis among Very Metal-poor Stars in the Galactic Halo from the HESP-GOMPA Survey 
    Bandyopadhyay, A; Sivarani, T; Beers, Timothy C; Susmitha, A; Nayak, Prasanta K; Pandey, Jeewan C (American Astronomical Society, 2022-10-01)
    We present a study on the detailed elemental abundances of newly identified, bright, very metal-poor stars with the detection of lithium, initially observed as part of the SDSS/MARVELS pre-survey. These stars were selected ...
  • Signatures of Light Massive Relics on non-linear structure formation 
    Banerjee, Arka; Das, Subinoy; Maharana, Anshuman; Sharma, R. K (Oxford University Press on behalf of Royal Astronomical Society, 2022-10)
    Cosmologies with Light Massive Relics (LiMRs) as a subdominant component of the dark sector are well-motivated from a particle physics perspective, and can also have implications for the σ8 tension between early and late ...
  • Excitation of vertical breathing motion in disc galaxies by tidally-induced spirals in fly-by interactions 
    Kumar, Ankit; Ghosh, Soumavo; Kataria, Sandeep Kumar; Mousumi Das; Debattista, Victor P (Oxford University Press on behalf of Royal Astronomical Society, 2022-10)
    It is now clear that the stars in the Solar neighbourhood display large-scale coherent vertical breathing motions. At the same time, Milky Way-like galaxies experience tidal interactions with satellites/companions during ...
  • Extending the sunspot area series from Kodaikanal Solar Observatory 
    Jha, Bibhuti K; Hegde, M; Priyadarshi, Aditya; Mandal, Sudip; Ravindra, B; Banerjee, D (Frontiers, 2022-10)
    Kodaikanal Solar Observatory (KoSO) possesses one of world's longest and homogeneous records of sunspot observations that span more than a century (1904–2017). Interestingly, these observations (originally recorded in ...
  • Shape of the outer stellar warp in the Large Magellanic Cloud disk 
    Saroon, S; Subramanian, S (EDP Sciences, 2022-10)
    Warps are vertical distortions of the stellar or gaseous disks of galaxies. One of the proposed scenarios for the formation of warps involves tidal interactions among galaxies. A recent study identified a stellar warp in ...
  • A faster growth of perturbations in an early matter dominated epoch: primordial black holes and gravitational waves 
    Das, Subinoy; Maharana, Anshuman; Muia, Francesco (Oxford University Press on behalf of Royal Astronomical Society, 2022-09)
    We present a scenario for fast growth of cosmological perturbations; δ(t) ∼ a(t)s, a(t) being the scale factor, with s > 10 for the numerical examples reported in this article. The basic ingredients of the scenario are an ...
  • Simultaneous X-ray/UV Observations of Ultraluminous X-ray Source Holmberg II X-1 with Indian Space Mission Astrosat 
    Vinokurov, A; Atapin, K; Bordoloi, O. P; Sarkisyan, A; Kashyap, U; Chakraborty, M; Rahna, P. T; Kostenkov, A; Solovyeva, Y; Fabrika, S; Safonova, M; Gogoi, R; Sutaria, F. K; Murthy, J (Springer, 2022-09)
    We present the results of eight epochs of simultaneous UV and X-ray observations of the highly variable ultraluminous X-ray source (ULX) Holmberg II X-1 with AstroSat—Indian multiwavelength space satellite. During the ...
  • Investigation of rocket effect in bright-rimmed clouds using Gaia EDR3 
    Saha, Piyali; Maheswar, G; Ojha, D. K; Baug, Tapas; Neha, Sharma (Oxford University Press on behalf of Royal Astronomical Society, 2022-09)
    Bright-rimmed clouds (BRCs) are excellent laboratories to explore the radiation-driven implosion mode of star formation because they show evidence of triggered star formation. In our previous study, BRC 18 has been found ...
  • Evolution of Hen 3-1357, the Stingray Nebula 
    Pena, Miriam; Parthasarathy, M; Ruiz-Escobedo, Francisco (Oxford University Press on behalf of Royal Astronomical Society, 2022-09)
    The spectroscopic evolution of Hen 3-1357, the Stingray Nebula, is presented by analysing data from 1990 to 2021. High-resolution data obtained in 2021 with South African Large Telescope High Resolution Spectrograph and ...
  • Optical observations and dust modelling of comet 156P/Russell-LINEAR 
    Aravind, K; Halder, Prithish; Ganesh, Shashikiran; Sahu, D. K; Serra-Ricart, Miquel; Chambo, Jose J; Angchuk, D; Sivarani, T (Elsevier B.V., 2022-09-01)
    Comet 156P/Russell-LINEAR is a short period Jupiter family comet with an orbital period of 6.44 years. The results from spectroscopic, photometric, polarimetric observations and dust modelling studies are presented here. ...
  • Investigation of the rotational lines of A–X and C–A band systems of aluminium deuteride molecule using sunspot umbral spectra 
    Shanmugapriya, G; Karthikeyan, B; Rajamanickam, N; Bagare, S. P (Springer, 2022-09)
    A high-resolution sunspot umbra spectrum recorded in National Solar Observatory, Kitt Peak, in the visible and infrared wave number range was used to search the rotational lines of A 1Π–X 1Σ+ (0,0), (0,0), (1,0), (1,1), ...
  • TANSPEC: TIFR-ARIES Near-infrared Spectrometer 
    Sharma, Saurabh; Ojha, Devendra. K; Ghosh, Arpan; Ninan, Joe. P; Ghosh, Supriyo; Ghosh, Swarna. K; Manoj, P; Naik, Milind. B; D'Costa, Savio, L. A; Reddy, B. Krishna; Nanjappa, Nandish; Pandey, Rakesh; Sinha, Tirthendu; Panwar, Neelam; Susmitha, A; Kaur, Harmeen; Sahu, Sanjit; Bangia, Tarun; Poojary, Satheesha S; Jadhav, Rajesh. B; Bhagat, Shailesh. B; Meshram, Ganesh. S; Shah, Harshit; Rayner, John. T; Toome, Douglas. W; Sandimani, Pradeep. R (IOP Publishing Ltd on behalf of the Astronomical Society of the Pacific, 2022-08)
    We present the design and performance of the TANSPEC, a medium-resolution 0.55–2.5 μm cryogenic spectrometer and imager, now in operation at the 3.6 m Devasthal Optical Telescope (DOT), Nainital, India. The TANSPEC provides ...
  • On the Bianchi identity in generalized theories of gravity 
    Kolekar, Sanved (Springer, 2022-08)
    We examine the generalised Bianchi identity, ∇a Eab = 0 where Eab is the equation of motion tensor of a general class of theories of gravity whose Lagrangian L(gab, Ra bcd ) depends arbitrarily on gab and Ra bcd but ...
  • The near ultraviolet transient surveyor (NUTS): An ultraviolet telescope to observe variable sources 
    Ambily, S; Sarpotda, Mayuresh; Mathew, Joice; Binukumar, G; Sreejith, A. G; Nirmal, K; Murthy, J; Safonova, M; Mohan, Rekhesh; Aggarval, Vinod Kumar; Nagabhushanam, S; Jeeragal, Sachin (Springer, 2022-08)
    Observing the ultraviolet (UV) sky for time-varyiable phenomena is one of the many exciting science goals that can be achieved by a relatively small aperture telescope in space. The Near Ultraviolet Transient Surveyor ...
  • The Astropy Project: Sustaining and Growing a Community-oriented Open-source Project and the Latest Major Release (v5.0) of the Core Package 
    The Astropy Collaboration; Price-Whelan, Adrian M; Lim, Pey Lian; Earl, Nicholas; Starkman, Nathaniel; Bradley, Larry; Shupe, David L; Patil, Aarya A; Corrales, Lia; Brasseur, C. E; Nothe, Maximilian; Singer, Leo P; Singhal, Jaladh; Sinha, Manodeep; Sipocz, Brigitta M; Spitler, Lee R; Stansby, David; Streicher, Ole; Sumak, Jani; Tollerud, Erik; Swinbank, John D; Paper Authors; Taranu, Dan S; Tewary, Nikita; Tremblay, Grant R; Val-Borro, Miguel de; Kooten, Samuel J. Van; Vasovic, Zlatan; Verm, Shresth; Cardoso, Jose Vinícius de Miranda; Williams, Peter K. G; Morris, Brett M; Aldcroft, Thomas L; Wilson, Tom J; Winkel, Benjamin; Wood-Vasey, W. M; Xue, Rui; Yoachim, Peter; Zhang, Chen; Zonca, Andrea; Astropy Project Contributors; Ginsburg, Adam; Vaher, Eero; Alvarado-Montes, Jaime A; Weaver, Benjamin A; Tocknell, James; Jamieson, William; Kerkwijk, Marten H. van; Robitaille, Thomas P.; Merry, Bruce; Bachetti, Matteo; Gunthe, H. Moritz; Archibald, Anne M; Bodi, Attila; Bapat, Shreyas; Barentsen, Geert; Bazan, Juanjo; Biswas, Manish; Boquien, Mederic; Handberg, Rasmus; Burke, D. J; Cara, Daria; Cara, Mihai; Conroy, Kyle E; Conseil, Simon; Craig, Matthew W; Cross, Robert M; Cruz, Kelle L; D'Eugenio, Francesco; Dencheva, Nadia; Hart, Akeem; Devillepoix, Hadrien A. R; Dietrich, Jorg P; Eigenbrot, Arthur Davis; Erben, Thomas; Ferreira, Leonardo; Foreman-Macke, Daniel; Fox, Ryan; Freij, Nabil; Garg, Suyog; Geda, Robel; Hatfield-Dodds, Zac; Glattly, Lauren; Gondhalekar, Yash; Gordon, Karl D; Grant, David; Greenfield, Perry; Groener, Austen M; Guest, Steve; Gurovich, Sebastian; Homeier, Derek; Hosseinzadeh, Griffin; Jenness, Tim; Jones, Craig K; Joseph, P; Kalmba, J. Bryce; Karamehmetoglu, Emir; Salgado, Jesus; Kałuszynski, Mikołaj; Kelley, Michael S. P; Kern, Nicholas; Kerzendor, Wolfgang E; Koch, Eric W; Kulumani, Shankar; Lee, Antony; Ly, Chun; M, Zhiyuan; MacBride, Conor; Sanghi, Aniket; Maljaars, Jakob M; Muna, Demitri; Murphy, N. A; Norman, Henrik; O'Steen, Richard; Oman, Kyle A; Pacifici, Camilla; Pascual, Sergio; Pascual-Granado, J; Patil, Rohit R; Saunders, Nicholas; Perren, Gabriel I; Pickering, Timothy E; Rastogi, Tanuj; Roulston, Benjamin R; Ryan, Daniel F; Rykoff, Eli S; Sabater, Jose; Sakurikar, Parikshit; Savchenko, Volodymyr; Schwardt, Ludwig; Seifert-Eckert, Michael; Shih, Albert Y; Jain, Anany Shrey; Shukla, Gyanendra; Sick, Jonathan; Donath, Axel; Simpson, Chris; Singanamalla, Sudheesh (American Astronomical Society, 2022-08-20)
    The Astropy Project supports and fosters the development of open-source and openly developed Python packages that provide commonly needed functionality to the astronomical community. A key element of the Astropy Project ...
  • SCALES on Keck: optical design 
    Kupke, Renate; Stelter, R. Deno; Hasan, Amirul; Surya, Arun; Kain, Isabel; Briesemeister, Zackery; Li, Jialin; Hinz, Phil; Skemer, Andrew; Gerard, Benjamin; Dillon, Daren; Ratliff, Christopher (SPIE-The International Society for Optical Engineering, 2022-08)
    SCALES is a high-contrast, infrared coronagraphic imager and integral field spectrograph (IFS) to be deployed behind the W.M. Keck Observatory adaptive optics system. A reflective optical design allows diffraction-limited ...
  • Design and development of WFOS, the Wide-Field Optical Spectrograph for the Thirty Meter Telescope 
    Steidel, Charles; Peng, Eric; Fucik, Jason; Nash, Reston; Kaye, Stephen; Jacoby, George; Delabre, Bernard; Ramya, S; Divakar, Devika; Varshney, Hari Mohan; Sivarani, T; Uraguchi, Fumihiro; Ozaki, Shinobu; Ji, Hangxin; Tao, L V; Chiu, Kent; Zhu, Qinfeng; Andersen, David; Miles, John; Lasi, Davide (SPIE-The International Society for Optical Engineering, 2022-08)
    We present the current design of WFOS, a wide-field UV/optical (0.31-1.0 µm) imaging spectrograph planned for first-light on the TMT International Observatory 30 m telescope. WFOS is optimized for high sensitivity across ...

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