102 citations · 277 across the 15 of their papers we have counts for
15 papers
High-resolution spectroscopy of the bipolar proto-planetary nebula Hen 3-1475, the Garden Sprinkler Nebula
Ana Valeria Beltrán-Sánchez, Miriam Peña, Mudumba Parthasarathy
A detailed analysis of high-resolution spectra in the optical and near-infrared range of the central zone of the proto-planetary nebula Hen 3-1475, obtained in 2006 and 2024, is co…
High-resolution spectroscopy of the variable hot post-AGB star LS 4331 (IRAS 17381-1616)
N. P. Ikonnikova, M. Parthasarathy, I. A. Shaposhnikov +2
An analysis of high-resolution () optical spectrum of hot (B1Ibe) post-AGB star LS 4331 (IRAS 17381-1616) is presented. The detailed identification of the observed ab…
Seventeen 2 Micron All Sky Survey (2MASS) hypervelocity stars (HVS) from Gaia DR3
Parthasarathy Mudumba
As part of an ongoing search for hypervelocity stars (HVS) I found seventeen two micron all sky survey (2MASS) sources with Gaia G magnitudes less than 16.0 and radial velocities l…
K-band spectra of selected post-AGB candidates
M. Parthasarathy, C. Muthumariappan, S. Muneer
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. T…
Infrared properties of Planetary Nebulae with [WR] and central stars
C. Muthumariappan, M. Parthasarathy
We report the IR properties of planetary nebulae with WR type and central stars known to date and compare them with the IR properties of a sample of PNe with H-rich central…
The puzzling high velocity G5 supergiant star HD 179821 : new insight from Gaia DR2 data
M. Parthasarathy, G. Jasniewicz, F. Thévenin
HD 179821 is classified as G5 Ia star. From the IRAS colors and spectral energy distributions it was classified as a post-AGB star. But some studies classify it as a massive (30 to…
Low resolution spectroscopy of selected Algol systems
D. Shanti Priya, J. Rukmini, M. Parthasarathy +4
The analysis of spectroscopic data for 30 Algol-type binaries is presented. All these systems are short period Algols having primaries with spectral types B and A. Dominant spectra…
Physical properties of the very young PN Hen3-1357 (Stingray Nebula) based on multiwavelength observations
Masaaki Otsuka, M. Parthasarathy, A. Tajitsu +1
We have carried out a detailed analysis of the interesting and important very young planetary nebula (PN) Hen3-1357 (Stingray Nebula) based on a unique dataset of optical to far-IR…
SPIRITS: Uncovering Unusual Infrared Transients With Spitzer
Mansi M. Kasliwal, John Bally, Frank Masci +44
We present an ongoing, systematic search for extragalactic infrared transients, dubbed SPIRITS --- SPitzer InfraRed Intensive Transients Survey. In the first year, using Spitzer/IR…
New determination of abundances and stellar parameters for a set of weak G-band stars
A. Palacios, G. Jasniewicz, T. Masseron +3
Weak G-band (wGb) stars are very peculiar red giants almost devoided of carbon and often mildly enriched in lithium. Despite their very puzzling abundance patterns, very few detail…
An Excess of Mid-Infrared Emission from the Type Iax SN 2014dt
Ori D. Fox, Joel Johansson, Mansi Kasliwal +12
Supernovae Type Iax (SNe Iax) are less energetic and less luminous than typical thermonuclear explosions. A suggested explanation for the observed characteristics of this subclass…
Line Identifications of Type I Supernovae: On the Detection of Si II for these Hydrogen-poor Events
J. T. Parrent, D. Milisavljevic, A. M. Soderberg +1
Here we revisit line identifications of type I supernovae and highlight trace amounts of unburned hydrogen as an important free parameter for the composition of the progenitor. Mos…
Chemical composition of UV-bright star ZNG 4 in the globular cluster M13
S. Ambika, M. Parthasarathy, W. Aoki +4
We present a detailed model-atmosphere analysis of ZNG 4, a UV-bright star in the globular cluster M13. From the analysis of a high resolution () spectrum of th…
Low resolution spectroscopy of ISOGAL sources: Search for early-type stars with infrared excess
M. Schultheis, M. Parthasarathy, A. Omont +4
An analysis of low resolution spectra and infared data of 29 ISOGAL-DENIS sources with mid-IR excess is presented. Eight ISOGAL sources from our sample with 7-15 micron excess are…
Birth and early evolution of a planetary nebula
M. Bobrowsky, K. C. Sahu, M. Parthasarathy +1
The final expulsion of gas by a star as it forms a planetary nebula --- the ionized shell of gas often observed surrounding a young white dwarf --- is one of the most poorly unders…