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Browsing by Author "Ojha, D. K"

Browsing by Author "Ojha, D. K"

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  • 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 ...
  • Constraints on the evolution of the Triton atmosphere from occultations: 1989–2022 
    Sicardy, B; Tej, A; Gomes-Júnior, A. R; Romanov, F. D; Bertrand, T; Ashok, N. M; Lellouch, E; Morgado, B. E; Assafin, M; Desmars, J; Camargo, J. I. B; Kilic, Y; Ortiz, J. L; Vieira-Martins, R; Braga-Ribas, F; Ninan, J. P; Bhatt, B. C; Pramod Kumar, S; Swain, V; Sharma, S; Saha, A; Ojha, D. K; Pawar, G; Deshmukh, S; Deshpande, A; Ganesh, S; Jain, J. K; Mathew, S. K; Kumar, H; Bhalerao, V; Anupama, G. C; Barway, Sudhanshu; Brandeker, A; Floren, H. G; Olofsson, G; Bruno, G; Mao, Y. M; Ye, R. H; Zou, Q. Y; Sun, Y. K; Shen, Y. Y; Zhao, J. Y; Grishin, D. N; Romanova, L. V; Marchis, F; Fukui, K; Kukita, R; Benedetti-Rossi, G; Santos-Sanz, P; Dhyani, N; Gokhale, A; Kate, A (EDP Sciences, 2024-02)
    Context. In about 2000, the south pole of Triton experienced an extreme summer solstice that occurs every ∼650 years, when the subsolar latitude reached about 50°S. Bracketing this epoch, a few occultations probed the ...
  • Far-infrared study of a few southern Galactic star forming regions 
    Ojha, D. K; Ghosh, S. K; Verma, R. P (Astronomical Society of India, 2002-09)
    Simultaneous far-infrared observations at 130 and 200 pm of the southern Galactic star forming regions (associated with mAS 12326-6245, IRAS 17059-4132, !RAS 17160-3707 & IRAS 17233-3606) have been carried out using the ...
  • First light observations with TIFR near-infrared camera 
    Ojha, D. K; Ghosh, S. K; Verma, R. P; Chakraborti, A; Anandarao, B. G (Astronomical Society of India, 2002-09)
    The TIFR near-infrared camera (TmCAM) is based on the SBRC InSb focal plane array (58x62 pixels) sensitive between 1-5 pm. TIRCAM had its first engineering run at Gurusikhar 1.2 meter PRL telescope at Mount Abu during ...
  • Host galaxy magnitude of OJ 287 from its colours at minimum light 
    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 ...
  • In fl uence of Wolf – Rayet Stars on Surrounding Star-forming Molecular Clouds 
    Baug, T; Richard de Grijs; Dewangan, L. K; Herczeg, Gregory J; Ojha, D. K; Ke Wang; Licai Deng; Bhatt, B. C (IOP Publishing, 2019-11)
    We investigate the in fl uence of Wolf – Rayet ( W-R ) stars on their surrounding star-forming molecular clouds. We study fi ve regions containing W-R stars in the inner Galactic plane ( l ∼ [ 14 ° ...
  • Infrared and radio observations of IRAS 16571-4029 (RCW 116B). 
    Verma, R. P; Ghosh, S. K; Kulkarni, V. K; Ojha, D. K (Astronomical Society of India, 2003)
    Southern HII region RCW 116B (IRAS 16571-4029) has been mapped simultaneously at two far infrared wavelengths (at 150 and 210 μm) with a resolution of ~1 using the TIFR 1 m balloon-borne telescope. High angular resolution ...
  • Infrared and radio observations towards the ultracompact HII region IRAS 19111+1048. 
    Vig, S; Ghosh, S. K; Kulkarni, V. K; Ojha, D. K; Verma, R. P (Astronomical Society of India, 2003)
    Southern HII region RCW 116B (IRAS 16571-4029) has been mapped simultaneously at two far infrared wavelengths (at 150 and 210 μm) with a resolution of ~1 using the TIFR 1 m balloon-borne telescope. High angular resolution ...
  • Infrared L'band (lambda-cen- ~3.9 mu-m) observations with TIFR near-infrared camera (TIRCAM). 
    Ojha, D. K; Ghosh, S. K; Verma, R. P; Anandarao, B. G (Astronomical Society of India, 2003)
    TIRCAM is based on the SBRC InSb Focal Plane Array (58 x 62 pixels) sensitive between 1- 5 μm. TIRCAM system is described in Ojha et al. (2002). TIRCAM had its first light observations during March-April 2001 from Gurusikhar ...
  • Investigation of Rocket Effect in BRC 18 using Gaia EDR3 
    Saha, Piyali; Maheswar, G; Ojha, D. K; Neha, Sharma (Oxford University Press on behalf of Royal Astronomical Society, 2022-02)
    Bright-rimmed clouds (BRCs) are ideal candidates to study radiation-driven implosion mode of star formation as they are potential sites of triggered star formation, located at the edges of HII regions, showing evidence ...
  • 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 ...
  • ISOGAL: A deep survey of the obscured inner Milky Way with ISO at 7 mu m and 15 mu m and with DENIS in the near-infrared 
    Omont, A; Gilmore, G. F; Alard, C; Aracil, B; August, T; Baliyan, K; Beaulieu, S; Begon, S; Bertou, X; Blommaert, J. A. D. L; Borsenberger, J; Burgdorf, M; Caillaud, B; Cesarsky, C; Chitre, A; Copet, E; de Batz, B; Egan, M. P; Egret, D; Epchtein, N; Felli, M; Fouque, P; Ganesh, S; Genzel, R; Glass, I. S; Gredel, R; Groenewegen, M. A. T; Guglielmo, F; Habing, H. J; Hennebelle, P; Jiang, B; Joshi, U. C; Kimeswenger, S; Messineo, M; Miville-Deschenes, M. A; Moneti, A; Morris, M; Ojha, D. K; Ortiz, R; Ott, S; Parthasarathy, M; Perault, M; Price, S. D; Robin, A. C; Schultheis, M; Schuller, F; Simon, G; Soive, A; Testi, L; Teyssier, D; Tiphene, D; Unavane, M; van Loon, J. T; Wyse, R (EDP Sciences, 2003-06)
    The ISOGAL project is an infrared survey of specific regions sampling the Galactic Plane selected to provide information on Galactic structure, stellar populations, stellar mass-loss and the recent star formation history ...
  • Mapping of the Orion molecular cloud in the [CII] line and continuum at 158 μm 
    Mookerjea, B; Ghosh, S. K; Kaneda, H; Nakagawa, T; Ojha, D. K; Rengarajan, T. N; Shibai, H; Verma, R. P (Astronomical Society of India, 2001)
    A fabry Perot Spectrometer (FPS) tuned to the astrophysically interesting (CII) line at 157.7409 µm, developed at ISAS (Japan) has been successfully interfaced to the TIFR 100 cm far-infrared balloon borne telescope. A ...
  • Multi-wavelength studies of Galactic HII regions 
    Samal, M. R; Pandey, A. K; Ojha, D. K; Zinchenko, I; Bhatt, B. C; Ghosh, S. K; Pandey, B (Astronomical Society of India, 2010)
    We present the recent results obtained with multiwavelength observations of three Galactic HII regions. Our findings suggest these regions are likely candidates of triggered star formation, where star formation in their ...
  • Multi-wavelength study of the young cluster NGC 1624 
    Jose, J; Pandey, A. K; Ogura, K; Ojha, D. K; Bhatt, B. C; Samal, M. R; Chauhan, N (Astronomical Society of India, 2010)
    We present preliminary results of deep optical and nearinfrared observations of the young cluster NCC 1624 associated with the H II region Sh2-212. Basic parameters of the cluster, young stellar population, initial mass ...
  • A multiwavelength census of stellar contents in the young cluster NGC 1624 
    Jose, J; Pandey, A. K; Ogura, K; Ojha, D. K; Bhatt, B. C; Samal, M. R; Chauhan, N; Sahu, D. K; Rawat, P. S (Wiley-Blackwell, 2011-03)
    We present a comprehensive multiwavelength analysis of the young cluster NGC 1624 associated with the H ii region Sh2-212 using optical UBVRI photometry, optical spectroscopy and GMRT radio continuum mapping along with the ...
  • A Multiwavelength Study of Galactic H II Region Sh 2-294 
    Samal, M. R; Pandey, A. K; Ojha, D. K; Ghosh, S. K; Kulkarni, V. K; Bhatt, B. C (University of Chicago Press, 2007-12)
    We present the observational results of Galactic H ii region Sh 2-294, using optical photometry, narrowband imaging, and radio continuum mapping at 1280 MHz, together with archival data from the 2MASS, MSX, and IRAS surveys. ...
  • A multiwavelength study of star formation in the vicinity of galactic H II region Sh 2-100 
    Samal, M. R; Pandey, A. K; Ojha, D. K; Ghosh, S. K; Kulkarni, V. K; Kusakabe, N; Tamura, M; Bhatt, B. C; Thompson, M. A; Sagar, R (The American Astronomical Society, 2010-05)
    We present multiwavelength investigation of morphology, physical-environment, stellar contents, and star formation activity in the vicinity of star-forming region Sh 2-100. It is found that the Sh 2-100 region contains ...
  • A Multiwavelength Study of the Galactic Star Forming Region Associated with IRAS 20255+3712 / S 106 
    Ghosh, S. K; Kulkarni, V. K; Ojha, D. K; Verma, R. P (Astronomical Society of India, 2003)
    The Galactic star forming region associated with IRAS 20255+3712 / S 106 has been mapped simultaneously in 150 and 210 μm bands using the TIFR 1-metre balloon borne far-infrared (FIR) telescope with an angular resolution ...
  • A multiwavelength study of the massive star-forming region IRAS 06055+2039 (RAFGL 5179) 
    Tej, A; Ojha, D. K; Ghosh, S. K; Kulkarni, V. K; Verma, R. P; Vig, S; Prabhu, T. P (EDP Sciences, 2006-06)
    Aims.We present a multiwavelength study of the massive star-forming region associated with IRAS 06055+2039. Methods.Narrow-band near-infrared (NIR) observations were carried out with UKIRT-UFTI in molecular hydrogen and ...

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