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Browsing by Author "Bhatt, H. C"

Browsing by Author "Bhatt, H. C"

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  • Disks around young stellar objects 
    Bhatt, H. C (Indian Academy of Science, 2011-07)
    By 1939, when Chandrasekhar’s classic monograph on the theory of Stellar Structure was published, although the need for recent star formation was fully acknowledged, no one had yet recognized an object that could be called ...
  • Dissecting galaxies: spatial and spectral separation of emission excited by star formation and AGN activity 
    Davies, R. L; Groves, B; Kewley, L; Dopita, M. A; Hampton, E. J; Shastri, P; Scharwachter, J; Sutherland, R; Kharb, P; Bhatt, H. C; Jin, C; Banfield, J; Zaw, I; James, B; Juneau, S; Srivastava, S (Oxford University Press on behalf of the Royal Astronomical Society, 2016-10-21)
    The optical spectra of Seyfert galaxies are often dominated by emission lines excited by both star formation and active galactic nucleus (AGN) activity. Standard calibrations (such as for the star formation rate) are not ...
  • Dust around Herbig Ae/Be stars: IRAS low resolution spectra 
    Bhatt, H. C; Gorti, U (Astronomical Society of India, 1993)
    IRAS low resolution spectra are presented for 17 Herbig Ae/Be stars. The observed spectral characteristics are correlated with reddening E(B-V) and the spectral type of the star. The silicate emission feature at 9.7 ...
  • Dynamics of embedded protostar clusters in clouds 
    Gorti, U; Bhatt, H. C (Royal Astronomical Society, 1996-01)
    The dynamics of clumps and protostars in a young protocluster system embedded in its parent molecular cloud are studied here through numerical simulations. It is found that the presence of massive clumps and their dynamics ...
  • Effect of gas drag on the dynamics of protostellar clumps in molecular clouds 
    Gorti, U; Bhatt, H. C (The American Astronomical Society, 1995-01)
    We have recently reported the polarization changes of the intense electromagnetic radiation, in active galactic nuclei and pulsars, due to stimulated Raman scattering. In this paper, we show that the incident and the ...
  • Emission-line CCD imaging of three southern symbiotic stars 
    Bhatt, H. C; Sagar, R (Indian Academy of Sciences, 1991-06)
    Symbiotic stars that are strong radio sources and have cool dust emitting in the IR are expected to have extended emission nebulae around them. In order to search for such emission nebulae, CCD imaging of three symbiotic ...
  • Enhanced luminosity of young stellar objects in cometary globules 
    Maheswar, G; Bhatt, H. C (Springer, 2008-06)
    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 star-forming ...
  • Enhanced star formation in the cometary globules of the GUM nebula 
    Bhatt, H. C (Royal Astronomical Society, 1993-06-01)
    Evidence for an enhanced rate of star formation in the cometary globules of the Gum nebula is presented. The IRAS Point Source Catalog has been searched for sources with spectral energy distributions characteristic of young ...
  • Evolution of emission line activity in intermediate mass young stars 
    Manoj, P; Bhatt, H. C; Maheswar, G; Muneer, S (American Astronomical Society, 2006-12-10)
    We present optical spectra of 45 intermediate-mass Herbig Ae/Be stars. Together with the multiepoch spectroscopic and photometric data compiled for a large sample of these stars and ages estimated for individual stars by ...
  • An Evolved Disk Surrounding the Massive Main-Sequence Star MWC 297? 
    Manoj, P; Ho, P. T. P; Ohashi, N; Zhang, Q; Hasegawa, T; Chen, H - R; Bhatt, H. C; Ashok, N. M (University of Chicago Press, 2007-10)
    We present the results of the interferometric observations of the circumstellar disk surrounding MWC 297 in the continuum at 230 GHz (1.3 mm) and in the () rotational transitions of 12CO,13CO, and C18O using the Submillimeter ...
  • High-latitude molecular clouds and near-by OB associations 
    Bhatt, H. C (2000-09)
    The Galactic disribution of the high-latitude molecular clouds is considered. It is suggested that the majority of these clouds are clustered in two large shells around the two closest OB associations, Per OB3/Cas-Tau and ...
  • Indian Institute of Astrophysics: scientific profile (2000-2009) 
    Bhatt, H. C; Shastri, P (Indian Institute of Astrophysics, 2010-03)
  • Intermediate Galactic Latitude Starforming Region-CG 12 
    Maheswar, G; Manoj, P; Bhatt, H. C (Astronomical Society of India, 2002-09)
    Optical linear polarization measurements of stars seen projected towards CG 12, an intermediate latitude (b = 2P .1) starforming cloud, have been made. The results show that the polarization vectors of the majority of the ...
  • Intermediate Galactic Latitude Starforming Region-CG 12 
    Maheswar, G; Manoj, P; Bhatt, H. C (Astronomical Society of India, 2002-09)
    Optical linear polarization measurements of stars seen projected towards CG 12, an intermediate latitude (b = 2P .1) starforming cloud, have been made. The results show that the polarization vectors of the majority of the ...
  • Internal kinematics of open star clusters 
    Sagar, R; Bhatt, H. C (Royal Astronomical Society, 1989-02)
    Proper motion measurements are employed to investigate the internal kinematics of eight open star clusters. In most of the clusters considered, no dependence of the intrinsic dispersion in proper motion on stellar mass and ...
  • Internal motions in the open star clusters NGC 654 and 6087 
    Sagar, R; Bhatt, H. C (Astronomical Society of Indian, 1989-03)
    Proper motion measurements are used to study the internal kinematics in the open star clusters NGC 654 and 6087. It is found that intrinsic dispersions are independent of stellar mass and radial distance in both clusters. ...
  • Interstellar dust studies with TAUVEX 
    Maheswar, G; Muthu, C; Sujatha, N. V; Pandey, G; Bhatt, H. C; Kameswara Rao, N; Murthy, J (Astronomical Society of India, 2007-06)
    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 ° ...
  • IRAS 05436-007 
    Maheswar, G; Bhatt, H. C (International Astronomical Union, 2004)
  • Is the X-ray pulsar H 0253 + 193 a neutron star spun down in a molecular cloud? 
    Bhatt, H. C (The European Southern Observatory, 1990-06)
    The detection of 206s X-ray pulsations from H0253+193 indicates that the source is a compact object. It is argued here that object can not be a T Tauri star or Be/X –ray binary pulsar suggested that H 0253+193 is slowly ...
  • Is the X-ray pulsar H 0253 + 193 a neutron star spun down in a molecular cloud? 
    Bhatt, H. C (The European Southern Observatory, 1990-06)
    The detection of 206s X-ray pulsations from H0253+193 indicates that the source is a compact object. It is argued here that object can not be a T Tauri star or Be/X –ray binary pulsar suggested that H 0253+193 is slowly ...

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