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Browsing by Author "Parthasarathy, M"

Browsing by Author "Parthasarathy, M"

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  • The far-infrared (IRAS) excess in BQ() and related stars 
    Parthasarathy, M; Pottasch, S. R (European Southern Observatory, 1989-11)
    The FIR IRAS flux distributions and color of 12 peculiar emission-line objects (HD 51585, Hen 401, Hen 591, Hen 1013, He 2-138, M 2-9, HD 326971, Hen 1357, Hen 1428, Tc 1, Hen 1475, and M 1-26) are found to be similar to ...
  • The far-infrared (IRAS) excess in HD 161796 and related stars 
    Parthasarathy, M; Pottasch, S. R (European Southern Observatory, 1986-01)
    The far infrared IRAS measurements of the high galactic latitude F-supergiant HD 161796 and related stars are found to show strong far infrared excesses, due to large amounts of dust around them. For HD 161796 the dust ...
  • The far-infrared (IRAS) excess in luminous F-G stars 
    Pottasch, S. R; Parthasarathy, M (European Southern Observatory, 1988-03)
    The far-infrared IRAS excesses are found in ten luminous F-G stars. The far-IR fluxes from these stars are due to large amounts of dust around them. The far-IR flux distribution, far-IR luminosities and dust masses are ...
  • Gaia DR2 and EDR3 data and evolutionary status of post-AGB stars with high radial velocities 
    Aoki, Wako; Matsuno, Tadafumi; Parthasarathy, M (Oxford University Press on behalf of the Astronomical Society of Japan, 2022-12)
    Using the Gaia Data Release 2 (DR2) and Early Data Release 3 (EDR3) data and list of post-AGB candidates, we investigate the parallax, proper motion, and binarity for 20 post-AGB stars and candidates that have high radial ...
  • Gaia DR2 data and the evolutionary status of eight high-velocity hot post-AGB candidates 
    Parthasarathy, M; Matsuno, T; Aoki, W (Oxford University Press on behalf of the Astronomical Society of Japan, 2020-12)
    From Gaia DR2 data of eight high-velocity hot post-AGB candidates, LS 3593, LSE 148, LS 5107, HD 172324, HD 214539, LS IV −12 111, LS III +52 24, and LS 3099, we found that six of them have accurate parallaxes which made ...
  • Gaia EDR3 Data of Post-AGB Stars with Overabundance of s-process Elements: Evolutionary Status and Binarity 
    Parthasarathy, M (American Astronomical Society, 2022-02)
    Kamath et al. analyzed Gaia EDR3 data of 18 post-asymptotic giant branch (AGB) supergiants having overabundance of s-process elements, some of which exhibit unusually low luminosities in disagreement with expectations of ...
  • Ground-based optical astronomy in India 
    Parthasarathy, M (National Astronomical Observatory, 1996)
  • HD 105262: a high latitude metal-poor post-AGB. A supergiant with large proper motion 
    Reddy, B. E; Parthasarathy, M; Sivarani, T (European Southern Observatory, 1996-09)
    The large proper motion post-AGB supergiant stars are very rare. HD 105262 is a high galactic latitude (+72deg) A-type star with large proper motion (0.057arcsec/year) and high c1-index. Earlier, it was classified as a ...
  • High resolution spectroscopy of the high latitude rapidly evolving post-AGB star SAO 85766 (= IRAS 18062+2410) 
    Parthasarathy, M; García-Lario, P; Sivarani, T; Manchado, A; Sanz Fernández de Córdoba, L (European Southern Observatory, 2000-05)
    SAO 85766 (b = +20o) is an IRAS source with far-infrared colours similar to planetary nebulae. According to the HDE catalogue, its spectrum in 1940 was that of an A5 star. The UV fluxes and colours derived from data obtained ...
  • High resolution spectroscopy of the hot post-AGB stars IRAS 13266-5551 (CPD-55 5588) and IRAS 17311-4924 (Hen3-1428) 
    Sarkar, G; Parthasarathy, M; Reddy, B. E (EDP Sciences, 2005-03)
    High resolution spectra covering the wavelength range 4900 Å to 8250 Å of the hot post-AGB stars IRAS 13266-5551 (CPD-55 5588) and IRAS 17311-4924 (Hen3-1428) reveal absorption lines of C II, N II, O II, Al III, Si III and ...
  • High-resolution spectroscopy of the extremely iron-poor post-AGB star CCâLyr 
    Aoki, W; Matsuno, Tadafumi; Honda, S; Parthasarathy, M (Astronomical Society of Japan, 2017-04)
    High-resolution optical spectroscopy was conducted for the metal-poor post-AGB star CC Lyr to determine its chemical abundances and spectral line profiles. Our standard abundance analysis confirms its extremely low ...
  • High-resolution spectroscopy of the high-velocity hot post-AGB star IRAS 18379–1707 (LS 5112) 
    Ikonnikova, N. P; Parthasarathy, M; Dodin, A. V; Hubrig, S; Sarkar, G (Oxford University Press on behalf of the Royal Astronomical Society, 2020-02)
    The high-resolution (⁠R∼48000⁠) optical spectrum of the B-type supergiant LS 5112, identified as the optical counterpart of the post-AGB candidate IRAS 18379–1707 is analysed. We report the detailed identifications of the ...
  • Hot post-AGB stars 
    Parthasarathy, M; Gauba, G; Fujii, T; Nakada, Y (Kluwer Academic Publishers, 2001-08)
    From the study of IRAS sources with far-IR colors similar to planetary nebulae (PNe), several proto-planetary nebulae with hot (OB) post-AGB central stars have been detected. These stars form an evolutionary link between ...
  • Infrared properties of planetary nebulae with [WR] and wels central stars 
    Muthumariappan, C; Parthasarathy, M (Oxford University Press on behalf of the Royal Astronomical Society, 2020-03)
    We report the infrared (IR) properties of planetary nebulae (PNe) with Wolf–Rayet (WR) type and wels central stars known to date and compare them with the IR properties of a sample of PNe with H-rich central stars. We use ...
  • IRAS 17395-0841: A New Young Low Excitation Planetary Nebula 
    Vijapurkar, J; Drilling, J. S; Parthasarathy, M (American Astronomical Society, 1997-10)
    We report here the discovery of a new young low excitation planetary nebula IRAS 17395-0841.
  • 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 ...
  • IUE and ISO observations of the bipolar proto-planetary nebula Hen 401 (IRAS 10178-5958) 
    Parthasarathy, M; García-Lario, P; Gauba, G; de Martino, D; Nakada, Y; Fujii, T; Pottasch, S. R; de Cordoba, L. S. F (EDP Sciences, 2001-09)
    We present ultraviolet (IUE) and infrared (ISO) observations of the bipolar proto-planetary nebula Hen 401 which, combined with previously available optical and near infrared data, are used to reconstruct the overall ...
  • IUE observations of high galactic latitude F supergiants HD 161796 and HD 187885 
    Parthasarathy, M; Pottasch, S. R; Wamsteker, W (European Southern Observatory, 1988-09)
    Low resolution (6 A) IUE ultraviolet spectra of the high galactic latitude F supergiants HD 161796 (F3 Ib) and HD 187885 (F2-3I) are analyzed. The UV spectrum (1250 A to 3250 A) of HD 161796 shows no excess UV flux ...
  • The IUE ultraviolet spectrum of PC 11 
    Parthasarathy, M; Pottasch, S. R; Clavel, J (International Astronomical Union, 1993)
  • K-band spectra of selected post-AGB candidates 
    Parthasarathy, M; Muthumariappan, C; Muneer, S (Springer Nature, 2020-07)
    We present medium resolution (1000) K-band spectra of 12 post-AGB candidates and related stars. For several objects in our sample, these spectra were obtained for the first time. The Brγ line in emission is detected in ...

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