Have you ever wondered about whether there could be stars hotter than the Sun? Well, Sun is hot! Veritably, veritably briskly. Still, this large dynamo can be beaten at the’ voguishness’ game as has been shown by a discovery by Indian astronomers. A group of scientists, led by astronomers from the Pune- grounded National Centre for Radio Astrophysics (NCRA), have lately discovered a rare class of radio stars that are hotter than Sun. The success of the GMRT programme has revolutionised the notion about this class of stars, and has opened up a new window to study their fantastic magnetospheres, the NCRA said. These stars are surprisingly strong glamorous fields and a much stronger astral wind. In a press release, the NCRA said the platoon had also discovered three further similar stars in the history using the Giant Metrewave Radio Telescope (GMRT).
These Indian astronomers have discovered eight stars belonging to a rare class called’MRPs’or Main- sequence Radio Palpitation emitters using the GMRT located near Pune, leading exploration institute NCRA said on Friday, as reported by PTI. Of the total 15 MRPs known so far, 11 were discovered with the GMRT, of which eight were discovered in 2021 alone, thanks to the wide bandwidth and high perceptivity of the upgraded GMRT, the release said These discoveries are the fruits of an ongoing check with the GMRT, which was launched specifically for the purpose of working the riddle of MRPs,”the statement said.
What are radio stars?
The MRPs are stars hotter than the Sun with surprisingly strong glamorous fields, and much stronger astral wind. Due to this, they emit bright radio beats like a lighthouse, the exploration outfit said. Though the first MRP was discovered in 2000, it was only due to the high perceptivity of the upgraded GMRT (uGMRT) that the number of similar stars known have increased multiple times in recent times, with 11 of the 15 discovered using the high-tech telescope, the NCRA said.
It further said that the success of the check with the uGMRT suggests that the current notion that MRPs are rare objects may not be correct. Rather, they’re presumably more common, but are delicate to descry. This is due to the fact that the radio beats are visible only at certain times, and the miracle is substantially observable at low radio frequentness, the release added This is the frequence range where the uGMRT stands out as the most sensitive telescope in the world. The high perceptivity of the uGMRT and its capability to make high resolution images were necessary in enabling the recovery of the palpitated signal from the different types of radiation coming from the sky. This, combined with a strategic observation crusade, allowed the astronomers to overcome the difficulties, and reveal the true nature of these objects,”the release said.
It said that the study with the uGMRT allowed them to find that the glamorous field and temperature are two amounts that appear to play the major part in deciding how violent the radio palpitation will be. A exploration paper describing these new results was lately accepted for publication in’The Astrophysical Journal’, the release added Its lead author is Barnali Das, who lately completed PhD thesis under the supervision of Prof Poonam Chandra at the National Centre for Radio Astrophysics, Tata Institute of Fundamental Research (NCRA-TIFR) Pune. Das and Prof Chandra have been laboriously involved in colorful systems aimed at the characterisation of this little given class of objects MRPs. In fact, the name MRP was introduced by them in 2020, the release said.