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Browsing by Author "Bhatt, H. C"

Browsing by Author "Bhatt, H. C"

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  • Possible young stellar objects in the region of the Cygnus OB2 (VI Cygni) association from IRAS observations 
    Parthasarathy, M; Jain, S. K; Bhatt, H. C (EDP Sciences, 1992-12)
    Several massive young stellar objects are found from an analysis of the 12- to 100-micron flux data of IRAS sources in the region of the Cyg OB2 association. Sixty-four sources with positive spectral indices and steeply ...
  • Post-outburst phase of McNeil's nebula (V1647 Orionis) 
    Ojha, D. K; Ghosh, S. K; Tej, A; Verma, R. P; Vig, S; Anupama, G. C; Sahu, D. K; Parihar, P. S; Bhatt, B. C; Prabhu, T. P; Maheswar, G; Bhatt, H. C; Anandarao, B. G; Venkataraman, V (Blackwell Publishing, 2006-03)
    We present a detailed study of the post-outburst phase of McNeil's nebula (V1647 Orionis) using optical B, V, R, I and near-infrared (NIR) J, H, K photometric and low-resolution optical spectroscopic observations. The ...
  • Probable binary open star clusters in the Galaxy. 
    Subramaniam, A; Gorti, U; Sagar, R; Bhatt, H. C (EDP Science, 1995-10)
    The existence of double/binary clusters in the Magellanic Clouds is fairly well established, whereas only one such pair, h + χ Persei, is known in the Galaxy. From the catalogues of open clusters of the Galaxy, we have ...
  • Probing the physics of narrow line regions in active galaxies. II. the siding spring southern seyfert spectroscopic snapshot survey (S7) 
    Dopita, M. A; Shastri, P; Davies, R; Kewley, L; Hampton, E; Scharwachter, J; Sutherland, R; Kharb, P; Jose, J; Bhatt, H. C; Ramya, S; Jin, C; Banfield, J; Zaw, I; Juneau, S; James, B; Shweta Srivastava (IOP Publishing, 2015-03)
    Here we describe the Siding Spring Southern Seyfert Spectroscopic Snapshot Survey (S7) and present results on 64 galaxies drawn from the first data release. The S7 uses the Wide Field Spectrograph mounted on the ANU 2.3 m ...
  • Probing the physics of narrow-line regions in active galaxies. III. accretion and cocoon shocks in the liner NGC 1052 
    Dopita, M. A; Ho, I-Ting; Dressel, L. L; Sutherland, R; Kewley, L; Davies, R; Hampton, E; Shastri, P; Kharb, P; Jose, Jessy; Bhatt, H. C; Ramya, S; Scharwachter, J; Jin, C; Banfield, J; Zaw, I; James, B; Juneau, S; Srivastava, S (IOP Publishing, 2015-03-01)
    We present Wide Field Spectrograph integral field spectroscopy and Hubble Space Telescope Faint Object Spectrograph spectroscopy for the low-ionization nuclear emission line region (LINER) galaxy NGC 1052. We infer the ...
  • Probing the physics of Seyfert galaxies using their emission-line regions 
    Shastri, P; Dopita, M; Scharwachter, J; Kewley, L; Davies, R; Sutherland, R; Kharb, P; Banfield, J; Jose, J; Ramya, S; Srivastava, S; Bhatt, H. C; Hampton, E; Jin, J; Basurah, H; Fischer, S; Gupta, M; Panda, S; Sundar, M. N; Radhakrishnan, V (AIP Publishing, 2015-12)
    Active galaxies have powerhouses of radiation in their nuclear regions that are driven by accreting super-massive black holes. The accretion system also generates outflows of ionized gas and synchrotron-emitting bipolar ...
  • The Puppis OB III association: polarization measurements 
    Bhatt, H. C; Jain, S. K; Sagar, R (European Southern Observatory, 1998-03)
    Optical linear polarization measurements of association members and field stars in the region of the Puppis OB III association are presented. The association members are found to have larger values of polarization than the ...
  • Radial distribution of the integrated light and photometric colours in open star clusters 
    Sagar, R; Bhatt, H. C (Indian Academy of Sciences, 1989-06)
    Mass segregation in the form of preferential concentration of more massive stars in the central regions of a number of open star clusters has been known for some time. In this paper, integrated UBV colors in concentric ...
  • The role of radiation pressure in the narrow line regions of Seyfert host galaxies 
    Davies, R. L; Dopita, M. A; Kewley, L; Groves, B; Sutherland, R; Hampton, E. J; Shastri, P; Kharb, P; Bhatt, H. C; Scharwachter, J; Jin, C; Banfield, J; Zaw, I; James, B; Juneau, S; Srivastava, S (IOP Publishing, 2016-06-10)
    We investigate the relative significance of radiation pressure and gas pressure in the extended narrow line regions (ENLRs) of four Seyfert galaxies from the integral field Siding Spring Southern Seyfert Spectroscopic ...
  • S7 : Probing the physics of seyfert galaxies through their ENLR & HII regions 
    Dopita, M. A; Shastri, P; Scharwachter, J; Kewley, L. J; Davies, R; Sutherland, R; Kharb, P; Jose, Jessy; Bhatt, H. C; Ramya, S; Hamptona, E; Jina, C; Banfielda, J; Zawa, I; Srivastavaa, Shweta; Jamesa, B (Cambridge University Press, 2015-02)
    Here we present the first results from the Siding Spring Southern Seyfert Spectroscopic Snapshot Survey (S7) which aims to investigate the physics of ∼140 radio-detected southern active Galaxies with z<0.02 through Integral ...
  • SAO 75669: A late type giant behind the molecular cloud MBM 12 
    Bhatt, H. C; Sagar, R; Subramaniam, A; Gorti, U; Chandrasekhar, T; Ashok, N. M; Ragland, S (European Southern Observatory, 1994-09)
    Photometric and spectroscopic observations of the star SAO 75669 in the region of the high galactic latitude molecular cloud MBM 12 are presented. The optical, near-infrared and far-infrared IRAS photometric magnitudes ...
  • Segregation of dust and abundance inhomogeneities in globular clusters 
    Bhatt, H. C (Royal Astronomical Society, 1988-08)
    Segregation of dust in globular cluster protoclouds is considered as a possible mechanism for producing the observed heavy element abundance inhomogeneities within globular clusters. Segregation of dust towards the protocloud ...
  • Some possible observing programmes in stellar and galactic astronomy with the TAUVEX 
    Bhatt, H. C (Astronomical Society of India, 2007-06)
    While the major part of the survey observations with the TAU- VEX will be targeted on high galactic latitudes and celestial poles there are many observing proposals for stellar and galactic astronomy. Some of these on young ...
  • Spatial Distribution of Stellar Mass in the Large Magellanic Cloud Star Clusters 
    Subramaniam, A; Sagar, R; Bhatt, H. C (European Southern Observatory, 1993-06)
    The stellar mass distributions have been studied in halo regions (radius ranging from ~19 to 94 arcsec) of 5 young Large Magellanic Cloud star clusters. Effects of mass segregation have been observed in only NGC 1711. A ...
  • Star formation in molecular clouds and the initial mass function : A new model 
    Bhatt, H. C (Astronomical Society of India, 1999)
    The observed mass spectra for stars and interstellar clouds are discussed. Stars are born from clouds, but their mass spectra are fundamentally different. A new model is proposed in which the Salpeter function representing ...
  • Stellar contents of two young open clusters: NGC 663 and 654 
    Pandey, A. K; Upadhyay, K; Ogura, K; Sagar, R; Mohan, V; Mito, H; Bhatt, H. C; Bhatt, B. C (Royal Astronomical Society, 2005-04)
    UBVRI CCD photometry in a wide field around two young open clusters, NGC 663 and 654, has been carried out. Hα and polarimetric observations for the cluster NGC 654 have also been obtained. We use the photometric data to ...
  • A study of the starless dark cloud LDN 1570: Distance, dust properties, and magnetic field geometry 
    Eswaraiah, C; Maheswar, G; Pandey, A. K; Jose, J; Ramaprakash, A. N; Bhatt, H. C (EDP Sciences, 2013-08)
    Aims. We aim to map the magnetic field geometry and to study the dust properties of the starless cloud, L1570, using multi-wavelength optical polarimetry and photometry of the stars projected on the cloud. Methods. The ...
  • Study of variability of the polarization in Herbig Ae/Be stars 
    Jain, S. K; Bhatt, H. C (European Southern Observatory, 1995-06)
    We report our measurements of linear polarization of a number of Herbig Ae/Be stars made at several epochs during the period 1989-1993. These results together with the observations compiled from the published sources have ...
  • Supernova 1987A in LMC : Infrared Observations 
    Bhatt, H. C (Indian Institute of Astrophysics, 1988)
    Results obtained from infrared observations of SN 1987A have been summarized. The supernova developed near-infrared excesses with a characteristic temperature ~1250 k beginning around March 15, 1987. Infrared speckle ...
  • Supernova SN 1987A - Rotation rate of the central pulsar 
    Bhatt, H. C; Datta, B (Royal Astronomical Society, 1989-04)
    Using available observational data on supernova SN 1987A, firm quantitative lower limits on the rotation period of the central pulsar (assuming the pulsar luminosity to power the supernova light curve) are derived. It is ...

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