A5029925079- Stellar, planetary, and galactic studies
- Astro and Planetary Science
- Astronomy and Astrophysical Research
- Astrophysics and Star Formation Studies
- Planetary Science and Exploration
- Astronomical Observations and Instrumentation
- Space Exploration and Technology
- Pulsars and Gravitational Waves Research
- Adaptive optics and wavefront sensing
- High-pressure geophysics and materials
- Astronomical and nuclear sciences
- Laser-induced spectroscopy and plasma
Physical Research Laboratory
2016-2018
We present the discovery and characterization of a sub-Saturn exoplanet, TOI-6038~A~b, using PARAS-2 spectrograph. The planet orbits bright ($m_V=9.9$), metal-rich late F-type star, TOI-6038~A, with $T_{\rm{eff}}=6110\pm100~\mathrm{K}$, $\log{g}=4.118^{+0.015}_{-0.025}$, $[{\rm{Fe/H}}]=0.124^{+0.079}_{-0.077}$ dex. system also contains wide-orbit binary companion, TOI-6038~B, an early K-type star at projected separation $\approx3217$ AU. combined radial velocity data from photometric...
Abstract We present the discovery and characterization of a sub-Saturn exoplanet, TOI-6038 A b, using PARAS-2 spectrograph. The planet orbits bright ( m V = 9.9), metal-rich late F-type star, A, with T eff 6110 ± 100 K, <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mi>log</mml:mi> <mml:mi>g</mml:mi> <mml:mo>=</mml:mo> <mml:mn>4.11</mml:mn> <mml:msubsup> <mml:mrow> <mml:mn>8</mml:mn> </mml:mrow> <mml:mo>−</mml:mo> <mml:mn>0.025</mml:mn> <mml:mo>+</mml:mo>...
We report here strong evidence for a sub-Saturn around EPIC~211945201 and confirm its planetary nature. EPIC~211945201b was found to be candidate from {\it K2} photometry in Campaigns 5 \& 16, transiting bright star ($V_{\rm mag}=10.15$, G0 spectral type) 19.492 day orbit. However, the photometric data combined with false positive probability calculations using VESPA not sufficient scenario. Here we present high-resolution spectroscopic follow-up of target PARAS spectrograph (19 radial...
We report the discovery and characterization of a transiting sub-Saturn exoplanet TOI-6651b using PARAS-2 spectroscopic observations. The host, TOI-6651 ($m_{V}\approx 10.2$), is sub-giant, metal-rich G-type star with $[{\rm Fe/H}] = 0.225^{+0.044}_{-0.045}$, $T_{\rm eff} 5940\pm110\ \mathrm{K}$, $\log{g} 4.087^{+0.035}_{-0.032}$. Joint fitting radial velocities from spectrograph transit photometric data Transiting Exoplanet Survey Satellite (TESS) reveals planetary mass $61.0^{+7.6}_{-7.9}\...
Eclipsing Binaries (EBs) with one of the companions as very low mass stars (VLMS or M dwarfs) are testbeds to substantiate stellar models and evolutionary theories. Here, we present four EB candidates F type primaries, namely, SAO 106989, HD 24465, EPIC 211682657 205403, identified from different photometry missions, SuperWasp, KELT, Kepler 2 (K2) STEREO. Using high-resolution spectrograph, PARAS, at 1.2 m telescope Mount Abu, Rajasthan, India, hereby report detection VLMS EBs. We performed...
The PRL Advanced Radial-velocity Abu-sky Search (PARAS) instrument is a fiber-fed stabilized high-resolution cross-dispersed echelle spectrograph, located on the 1.2 m telescope in Mt. Abu India. Designed for exoplanet detection, PARAS capable of single-shot spectral coverage 3800 - 9600 Å, and currently achieving radial velocity (RV) precisions approaching ~1 s<sup>-1</sup> over several months using simultaneous ThAr calibration. As such, it one few dedicated spectrographs small (1-2...
We present here the optical and mechanical design of a fiber-fed High-resolution spectrograph at resolution (R) = 100,000 which will be under vacuum (0.001 to 0.005 mbar) temperature controlled environment 25C ± 0.001C. The attached our upcoming new PRL 2.5m aperture telescope Gurushikar, Mount Abu, Rajasthan, India. is named PARAS-2 after successful operation PARAS (PARAS-1) with existing 1.2m Abu since 2012 summer. (PARAS-2) operating in range 380nm 690nm wavelength single shot using Grism...