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Browsing by Author "Maheswar, G."

Browsing by Author "Maheswar, G."

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  • Additional polarised standards in the fields of known bright standard stars 
    Soam, A.; Maheswar, G.; Eswaraiah, C. (Springer, 2013-12-19)
    We present the results based on broad-band (VRI) polarimetric observations of a number of stars that are present towards the fields of already known bright po- larised standard stars namely BD+59° 389, HD 19820, and ...
  • Broad-band optical polarimetric studies towards the Galactic young star cluster Berkeley 59 
    Eswaraiah, C.; Pandey, A. K.; Maheswar, G.; Chen, W. P.; Ojha, D. K.; Chandola, H. C. (2012)
    We present multiwavelength optical linear polarimetric observations of 69 stars towards the young open cluster Berkeley 59. The observations reveal the presence of three dust layers located at distances of ∼300, ∼500 and ...
  • Broad-band optical polarimetric study of IC 1805 
    Medhi, B. J; Maheswar, G.; Brijesh, K.; Pandey, J. C.; Kumar, T. S.; Sagar, R. (2007)
    We present the BVR broad-band polarimetric observations of 51 stars belonging to the young open cluster IC 1805. Along with the photometric data from the literature, we have modelled and subtracted the foreground dust ...
  • Champagne flow and triggered star formation in NGC 1893 
    Maheswar, G.; Sharma, S.; Biman, J. M.; Pandey, A. K.; Bhatt, H. C. (2007)
    Using Hα grism spectroscopy and optical and Two-Micron All-Sky Survey photometry of the fields containing NGC 1893 and two emission nebulae, Sim 129 and Sim 130, we show the presence of a number of Hα and near-infrared ...
  • Distances to dense cores that contain very low luminosity objects 
    Maheswar, G.; Lee, C. W.; Dib, S. (2011)
    Aims. We estimate the distances to dense molecular cores that harbour very low luminosity objects (VeLLOs) detected by the Spitzer Space Telescope and attempt to confirm their VeLLO nature. Methods. The cloud distances ...
  • Enhanced luminosity of young stellar objects in cometary globules 
    Maheswar, G.; Bhatt, H. C. (2008-05-22)
    In this study we investigated the effects of external trigger on the characteristics of young stellar objects (YSOs) associated with cometary globules (CGs). We made optical spectroscopy of stars associated with ...
  • First optical and near-infrared polarimetry of a molecular cloud forming a proto-brown dwarf candidate 
    Soam, A.; Kwon, J.; Maheswar, G.; Tamura, M.; Lee, C. W. (The American Astronomical Society, 2015-04-20)
    LDN 328 is cited as an example of a fairly isolated clump contracting to form multiple sub-cores, possibly through gravitational fragmentation. In one of these sub-cores, a proto-brown dwarf (L328-IRS) candidate is in the ...
  • The IMF of stellar clusters: effects of accretion and feedback 
    Dib, S.; Shadmehri, M.; Padoan, P.; Maheswar, G.; Ojha, D. K.; Khajenabi, F. (2010)
    We have developed a model which describes the co-evolution of the mass function of dense gravitationally bound cores and of the stellar mass function in a protocluster clump. In the model, dense cores are injected, at a ...
  • Interstellar dust studies with TAUVEX 
    Maheswar, G.; Muthu, C.; Sujatha, N. V.; Pandey, G.; Bhatt, H. C.; Rao, N. K.; Murthy, J. (2007)
    We propose to carry out studies on the properties of inter- stellar dust using TAUVEX. Through the multi-band TAUVEX observations, particularly with the use of filters optimized for extinction observations of the 2175 ...
  • Magnetic field structure around cores with very low luminosity objects 
    Soam, A., et. al.; Maheswar, G. (ESO, 2015-01)
    Aims. We carried out optical polarimetry of five dense cores, (IRAM 04191, L1521F, L328, L673-7, and L1014) which are found to harbour very low luminosity objects (VeLLOs; Lᵢnt ≲ 0.1 Lꙩ ). This study was conducted mainly ...
  • Magnetic fields in cometary globules – IV. LBN 437 
    Soam, A.; Maheswar, G.; Bhatt, H. C.; Lee, C. W.; Ramaprakash, A. N. (2013)
    We present results of our R-band polarimetry of a cometary globule, LBN 437 (Gal 96-15, ℓ = 96◦, b = −15°), to study the magnetic field geometry of the cloud. We estimated a distance of 360 ± 65 pc to LBN 437 (also one ...
  • A method to determine distances to molecular clouds using near-IR photometry 
    Maheswar, G.; Lee, C. W.; Bhatt, H. C.; Mallik, S. V.; Dib, S. (2010)
    We aim to develop a method to determine distances to molecular clouds using JHK near-infrared photometry. The method is based on a technique that aids spectral classification of stars lying towards the fields containing ...
  • A multiwavelength polarimetric study towards the open cluster NGC1893 
    Eswaraiah, C.; Pandey, A. K.; Maheswar, G.; Medhi, B. J.; Pandey, J. C. (2011)
    We present multiwavelength linear polarimetric observations for 44 stars of the NGC1893 young open cluster region along with V-band polarimetric observations of stars of four other open clusters located between l ∼ 160◦ ...
  • Optical polarimetric study of open clusters: Distribution of interstellar matter towards NGC 654 
    Medhi, B. J.; Maheswar, G.; Pandey, J. C.; Kumar, T. S.; Sagar, R. (2008)
    We present new B, V and R linear polarimetric observations for 61 stars towards the region of the young open cluster NGC 654. In this study we found evidence for the presence of at least two layers of dust along the ...
  • Photometric search for variable stars in the young open cluster Berkeley 59 
    Lata, S.; Pandey, A. K.; Maheswar, G.; Mondal, Soumen; Kumar, Brijesh (Wiley Online, 2011-03-30)
    We present the time series photometry of stars located in the extremely young open cluster Berkeley 59. Using the 1.04-m telescope at Aryabhatta Research Institute of Observational Sciences (ARIES), Nainital, we have ...
  • Polarization towards the young open cluster NGC 6823 
    Medhi, B. J.; Maheswar, G.; Pandey, J. C.; Tamura, M.; Sagar, R. (2010)
    We present multiwavelength linear polarimetric observations of 104 stars towards the region of young open cluster NGC 6823. The polarization towards NGC 6823 is dominated by foreground dust grains and we found evidence ...
  • Pre-main-sequence variable stars in young open cluster NGC 1893 
    Lata, S.; Pandey, A. K.; Chen, W. P.; Maheswar, G.; Chauhan, N. (2012)
    We present results of multi-epoch (14 nights during 2007–2010) V-band photometry of the cluster NGC 1893 region to identify photometric variable stars in the cluster. The study identified a total of 53 stars showing ...
  • Science at high-altitude sites of ARIES – astrophysics and atmospheric sciences 
    Sagar, R.; Naja, M.; Maheswar, G.; Srivastava, A. K. (INSA, 2014)
    In this article we discuss various frontline research activities those are being carried out in the fields of Astronomy and Astrophysics and Atmospheric Sciences at Aryabhatta Research Institute of Observational Sciences ...
  • Star formation in young star cluster NGC 1893 
    Sharma, S.; Pandey, A. K.; Ojha, D. K.; Chen, W. P.; Ghosh, S. K.; Bhatt, B. C.; Maheswar, G.; Sagar, R. (2007)
    We present a comprehensive multiwavelength study of the star-forming region NGC 1893 to explore the effects of massive stars on low-mass star formation. Using near-infrared colours, slitless spectroscopy and narrow-band ...
  • Stellar contents and star formation in the young open cluster Stock 8 
    Jose, J.; Pandey, A. K.; Ojha, D. K.; Ogura, K.; Chen, W. P.; Bhatt, B. C.; Ghosh, S. K.; Minto, H.; Maheswar, G.; Sharma, S. (2008)
    We present UBVIc CCD photometry of the young open cluster Stock 8 with the aim of studying its basic properties such as the amount of interstellar extinction, distance, age, stellar contents and initial mass function ...

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