Indian astronomers

Indian astronomers discovered 8 rare stars hotter than the Sun

cosmos Interesting science Technology

The stars located far away in the Universe sometimes give us unique but also beneficial information. Our scientists and astronomers also study the bodies of the Universe outside the Solar System so that we get a chance to understand the astronomical events around us. In this episode, Indian astronomers have discovered eight very rarely visible stars. These stars found by this group are being told of the Main Sequence Radio Pulse Emitter (MRP) category. The team led by astronomers from the National Center for Radio Astrophysics in Pune made this discovery with the help of the Giant Meter wave Radio Telescope.

This team of Indian astronomers has found that these stars are hotter than the Sun, and their magnetic field is unusually very strong. Along with this, their ‘solar wind’ is also mighty. According to PTI, the NCRA told in a press release that the team has already discovered three more similar stars through GMRT.

Of the 15 known MRPs, 11 have been discovered through GART, out of which 8 have been found only in 2021. These discoveries have been made possible due to the greater sensitivity and broader bandwidth achieved by upgrading the GMR telescope. The survey of the telescope could detect the MRP, the statement said.

GMRT program success
NCRA says that the launch of GMRT has been done to solve the mysteries of MRP. The success of the GMRT program has revolutionized the notion of this class of stars, opening up new avenues for the study of these special magnetospheres.

What are these MRP
Main sequence radio pulse emitters (MRPs) are stars that are hotter than the Sun. Their magnetic fields are powerful. Their winds are also much stronger than the solar winds. For this reason, they appear like lighthouses in space, which emit very bright radio pulses.

Such a search is not easy
For the first time, this MRP was discovered in 2000, but due to the highly sensitive advanced GMRT, the number of such discovered stars could be so much in recent years. Of these 15 discovered stars, 11 have been found only through high-tech telescopes. Finding such objects is challenging because they are sometimes barely visible due to shining only at low frequencies.

How is the magnetic field detected?
To capture the low frequencies emanating from these stars, a very sensitive telescope is needed. The high sensitivity and capability of uGMRT to capture high-resolution images are beneficial for capturing the signals sent by these objects to be distinguished from different types of signals from the sky. Through uGMRT, information about their magnetic field and temperature is available, which determines the intensity of these waves.

The paper explaining these results has been accepted for publication in the Astrophysical Journal. Barnali Das, the first author of this study, has recently completed her Ph.D. under the guidance of Professor Poonam Chandra of NCRA, and both of them have named these stars as Main Sequence Radio Pulse Emitter (MRP).