With a temperature of 5,500 ° C , there is no denying that the surface of the Sun is live . Yet sit high above the star topology ’s control surface , in its upper atmosphere , a layer of gas call in thecoronaobliterates this figure . At almost 2 million ° one C , it is around 300 times hotter than the Sun ’s surface .
How the Sun ’s St. Elmo’s fire is heated to such a temperature has remained unsatisfactorily work out , and this puzzler has become known as the coronal heating trouble . In search of an answer , researcher from the National Centre for Radio Astrophysics ( NCRA ) , India , have used a extremely tender instrument to detect bantam flash of radio ignitor from all over the Sun . They think these sparks provide the first - ever signal for legion small magnetic explosion that together with have sufficient Department of Energy to heat the Sun ’s electric glow .
“ Our preliminary estimate suggest that these tiny charismatic blowup should jointly have enough energy to heat the corona , which is on the dot what is require for solving the coronal heating problem , ” Dr Atul Mohan , study Centennial State - author formerly of the NCRA , and now at the Rosseland Centre for Solar Physics , Norway , say in astatement .
The squad ’s research , published inThe Astrophysical Journal Letters , relied on a telescope that went where no telescope had go before . Whilst former attempt had also searched for ostentation of radiation as evidence for magnetized explosions , no telescope had been raw enough to observe the emphatically weak bursts . That is where theMurchison Widefield Array(MWA ) , Australia , came in .
“ What made this breakthrough possible is the availability of data from a new engineering instrument , the Murchison Widefield Array ( MWA ) , and the work which we have been doing for the retiring few years at NCRA - TIFR to build the techniques and tools to make the most sensitive solar wireless images from this information , ” fellow carbon monoxide gas - generator Prof. Divya Oberoi of the NCRA explained in astatement . “ The very weak radio flashes we have discovered are about 100 time weaker than the weakest bursts reported till now . ”
Although on their own these detonation are weak , the sheer number and presence of them all around the Sun , suggests to the researcher that together they are powerful enough to explain the origin of the corona ’s extra warming organisation .
“ What makes this really exciting is that these flashes are present everywhere on the Sun and at all prison term , including in the region of weak charismatic domain , the so - visit ' smooth Sun ' regions , ” Surajit Mondal , the lead source of this worksaid .
