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जी एम आर टी द्वारे मिलिसेकंद स्पंदकाचा दशकभरातील अभ्यास - ०३/०२/२०२३
नॅशनल सेंटर फॉर रेडिओ अॅस्ट्रोफफजिक्स (NCRA), पुणे येथील शाश्त्रज्ञांच्या गटाने देशातील खोडदस्तिथ मीटर तरंगलांबीची महाकाय रेडिओ दुबीण (जीएमआरटी) आणि ग्रीन बँक टेलीस्ट्कोप (GBT) युनायटेड स्टेट्स मिलिसेकंद स्पंदकाचा (MSP) J1544+4937 चा दशकभर दीर्घकालीन अभ्यास केला.
A Decade long timing study of a millisecond Pulsar using the GMRT - 03/02/2023
A group of scientists at the National Centre for Radio Astrophysics (NCRA), Pune conducted a decade long term timing study of a galactic millisecond pulsar (MSP) J1544+4937 with the Giant Metrewave Radio Telescope (GMRT) in India and Green Bank Telescope (GBT) in the United States. Sangita Kumari, a PhD student at NCRA under the guidance of Dr. Bhaswati Bhattacharyya carried out this longest-duration timing study of a galactic field MSP with the GMRT using the observations at multiple frequencies.
New uGMRT Images Reveal Complexity of Galaxy Cluster Abell 2256 and new insights on Merging Event - 22/01/2023
Researchers have used the upgraded Giant Metrewave Radio Telescope (uGMRT) in India to produce the most detailed image yet of the galaxy cluster Abell 2256. The new uGMRT images reveal that radio emission is more extended at low frequencies and previously undetected regions where plasma processes such as turbulence and shocks accelerate particles, causing radio emission.
Record-breaking detection of radio signal from atomic hydrogen in extremely distant galaxy using GMRT - 16/01/2023
Astronomers from McGill University in Canada and the Indian Institute of Science (IISc) in Bengaluru have used data from the Giant Metrewave Radio Telescope (GMRT) in Pune to detect a radio signal originating from atomic hydrogen in an extremely distant galaxy. The astronomical distance over which such a signal has been picked up is the largest so far by a large margin. This is also the first confirmed detection of strong lensing of 21 cm emission from a galaxy.
Indian Pulsar Timing Array charts interstellar weather to capture black hole symphony
The Indian Pulsar Timing Array (InPTA) announced its first official Data Release or the InPTA DR1, published recently by the Publications of the Astronomical Society of Australia (Tarafdar et al. 2022, https://doi.org/10.1017/pasa.2022.46).
RAD@home या सिटीझन शास्त्राद्यांद्वारे विलक्षण कृष्णविवर असणाऱ्या दीर्घिकेच्या शोध
आनंद होता यांच्या नेतृत्वाखालील एका समुहाने जीएमआरटी सह अनेक आंतरराष्ट्रीय दुर्बिणीचा वापर करुन एक दुर्मीळ खगोलशात्रीय घटनेचा शोध लावला आहे.
RAD@home Citizen scientists discover a monster blackhole spewing fire at another galaxy
A team of scientists, led by Ananda Hota have discovered an extremely rare case of a monster black hole spewing a fiery jet at another galaxy, using GMRT and several other international telescopes. Such radio jets are almost every time two-sided, but in this case, the jet appears one- sided, which is puzzling. It is widely believed that winds and jets are also responsible for suppressing the formation of new stars in galaxies. This new discovery (RAD12) by the RAD@home Citizen Science Research Collaboratory ( #RADatHomeIndia ) will be an opportunity in understanding this process of suppression of star formation and a demonstration of direct public participation in research.
जायंट मिटरवेव्ह रेडिओ टेलिस्कोप (GMRT) द्वारे “GMRT Cold-HI AT z≈1” (GMRT-CATz1)” सर्वेक्षण
पुण्यातील नॅशनल सेंटर फॉर रेडिओ ऍस्ट्रोफिजिक्स (NCRA-TIFR) च्या खगोल शास्त्रज्ञांच्या समूहाने सुरवातीच्या विश्वातील आकाशगांगेतील हायड्रोजन वायू आणि ताऱ्यांचे प्रमाण मोजन्यासाठी (GMRT) चा वापर केला आहे. त्यांचे परिणाम असे दर्शवतात की नऊ अब्ज वर्षपूर्वि तारा निर्मिति करणाऱ्या आकाशगंगा प्रामुख्याने तटस्थ हायड्रोजन वायुपासन बनलेल्या होत्या.
The Giant Metrewave Radio Telescope Cold-HI GMRT-CATz1 Survey
A team of astronomers from the National Centre for Radio Astrophysics (NCRA-TIFR) in Pune has used the Giant Metrewave Radio Telescope (GMRT) to measure the relative amounts of hydrogen gas and stars in galaxies in the early Universe. Their results show that star-forming galaxies nine billion years ago were primarily made up of neutral hydrogen gas.
GMRT discovers more slowly spinning neutron stars near stellar graveyards
A team of scientists from NCRA with the GMRT High Resolution Southern Sky (GHRSS) survey has discovered two new slow pulsars from the same data which have been searched earlier for pulsars
जीएमआरटी ने शोधले तारकीय स्मशानभूमिजवळ हळूहळू फिरणारे न्यूट्रॉन तारे
जीएमआरटी हाय ररझोल्यशू न सदनन स्काय (जीएचआरएसएस) सर्वक्षे णाद्वारे एनसीआरएच्या शास्रज्ाांच्या चमनू े पर्वू ी शोधलेल्या पल्सार डटे ामधनू च दोन नर्वीन स्लो पल्सार शोधले आहेत.
जी एम आर टी ने रेडिओ आकाशगंगेतील 'वैश्विक-टँगो' ही अत्यंत दुर्मिळ घटना शोधली
भारतीय रेडिओ खगोलशात्रज्ञांच्या नेतृत्वाखालील आंतरराष्ट्रीय संघाने अत्यंत दुर्मिळ शोध लावला आहे. ज्यामध्ये दोन रेडिओ आकाशगंगांनी टँगो नृत्याचा अभिनय करून वैश्विक देखावाच निर्माण केला आहे. हा शोध नुकत्याच अप्ग्रेड केलेल्या जायांट मीटरवेव्ह रेडिओ टेलिस्कोप (uGMRT) द्वारे लावला गेला आहे.
GMRT spots extremely rare phenomenon of 'cosmic-tango' of radio galaxies
An international team led by Indian radio astronomers has discovered an extremely rare cosmic spectacle of two radio galaxies performing an act of tango dance. The discovery was recently made using the upgraded Giant Metrewave Radio Telescope (uGMRT), which is located near the Khodad village about 80 km north of Pune.
GMRT discovers the oldest known fossil radio galaxy trapped inside a cluster of galaxies
Recently, a team of Indian astronomers led by Dr Surajit Paul of Savitribai Phule Pune University (SPPU) has discovered an extremely aged remnant of the ‘lobes’ of a once active radio galaxy. This pair of gigantic lobes of a radio galaxy spanning 1.2 million light-years is located inside the galaxy cluster Abell 980 and it was created about 260 million years ago.
The upgraded GMRT opens a new frontier by enabling capabilities for international VLBI observations
The upgraded Giant Metrewave Radio Telescope (GMRT) achieved a new milestone in February this year. In two coordinated experiments conducted along with some telescopes of the European VLBI Network (EVN), Very Long Baseline Interferometry (VLBI) fringes with the GMRT were detected successfully. Five telescopes participated in this multi-country experiment on 14-Feb-2022: GMRT, Medicina and Noto (Italy), Westerbork (the Netherlands) and Zelenchukskaya (Russia).
The uGMRT confirms sharp reduction of atomic hydrogen in early universe
A team of astronomers from the National Centre for Radio Astrophysics (NCRA-TIFR) in Pune has used the upgraded Giant Metrewave Radio Telescope (GMRT) to find evidence for a sharp reduction in the amount of atomic hydrogen gas in galaxies over a 1-billion-year interval, from 9 billion years ago to 8 billion years ago. This detection of a rapid change in the atomic gas mass of galaxies in the early Universe helps to solve a long-standing open problem regarding the evolution of star-formation activity in the Universe. The research has been published in the June 1 issue of The Astrophysical Journal Letters.
GMRT reveals a fast radio burst progenitor born in a galaxy merger.
This is the first case of direct evidence for a recent merger in an FRB host, a major step towards understanding the progenitors of FRBs.
GMRT discovers several rare class of radio stars
A group of astronomers led by astronomers at NCRA, Pune, has discovered eight stars belonging to a rare class of stars called ‘MRPs’, or, Main-sequence Radio Pulse emitters, using the Giant Metrewave Radio Telescope (GMRT), located near Pune.
uGMRT unravels the eclipses of millisecond pulsars in compact binary
A group of scientists working at the National Centre for Radio Astrophysics (NCRA), Pune have for the first time unravelled the eclipse mechanisms for the millisecond pulsars in compact binary systems using the upgraded Giant Metrewave Radio Telescope (uGMRT).
The uGMRT confirms an unexpected event in millisecond pulsars - the cosmic clocks.
A group of nearly 40 astronomers, under the banner of Indian Pulsar Timing Array (InPTA),
have provided first time a clear evidence of unexpected changes in a milli-second radio pulsar
using the upgraded Giant Metrewave Radio Telescope (uGMRT). Millisecond pulsars are
exotic objects in the sky and are used in efforts for detecting ultra-low frequency gravitational
waves due to their extreme stable behaviour. These changes have attracted the attention of
astronomers across the globe because the millisecond pulsars are not expected to show such
behaviour and this star-clock may not be good enough to search for gravitational waves.
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