Kaimbridge Posted October 31, 2015 Share Posted October 31, 2015 Okay, in Fridayʼs SWL news update, a delta sunspot was noted and marked: So what is special about that particular spot, visually? Neither the shape or size of it looks different to the two spots to the left of it...or is that picture not supposed to highlight what makes a delta spot a delta spot, just that it is one? ~Kaimbridge~ Link to comment Share on other sites More sharing options...
Marcel de Bont Posted October 31, 2015 Share Posted October 31, 2015 1 uur geleden, Kaimbridge zei: So what is special about that particular spot, visually? Neither the shape or size of it looks different to the two spots to the left of it...or is that picture not supposed to highlight what makes a delta spot a delta spot, just that it is one? ~Kaimbridge~ Exactly. That picture is not supposed to highlight what makes a delta spot a delta spot. It just shows which spot is the delta sunspot. In visible light it looks just like any other spot. The thing is that the sunspot marked on that image has a negative polarity and is connected with penumbra with the positive polarity sunspots around it. That makes it a delta sunspots. For more info read this. An animation and our latest analyses can be found here. Link to comment Share on other sites More sharing options...
Guest Stephane Mabille Posted November 1, 2015 Share Posted November 1, 2015 Configuration magnetic FKC cluster number noyaux instable Link to comment Share on other sites More sharing options...
Vancanneyt Sander Posted November 1, 2015 Share Posted November 1, 2015 Definition of the delta classification: Quote The umbrae of opposite polarity in a single penumbra. So when you look at the SDO magnetogram, you'll see two distinguished colors: Red and Blue. The red color stands for negative polarity, blue for positive polarity. By comparing the SDO HMI and HMIIF you can differentiate the polarity of sunspots and thus can classify a sunspot region for it's magnetic complexity with the basic rules found in our help article. As you might know about magnets, they can attract and detract, each spot has a polarity and when you mix it with an opposite polarity spot, things can get rough in the meaning that magnetic field lines can interfere with each other and cause more and stronger solar flares. Visually, nothing out of the ordinary, both spots of all polarities look similar, only the magnetogram will reveal their polarity secret Link to comment Share on other sites More sharing options...
Kaimbridge Posted November 3, 2015 Author Share Posted November 3, 2015 On 11/1/2015, 11:13:05, Vancanneyt Sander said: Visually, nothing out of the ordinary, both spots of all polarities look similar, only the magnetogram will reveal their polarity secret Ah, okay, that makes sense. But, that being the case, I'd suggest you use either just the magnetogram image, or both the magnetogram and the continuum/visible light images. Link to comment Share on other sites More sharing options...
Vancanneyt Sander Posted November 3, 2015 Share Posted November 3, 2015 Always HMI and HMIIF imagery, in Photoshop or GIMP you can stick them on eachother and zoom into a region and make one more transparent to compare visual with magnetogram and it reveals itself Link to comment Share on other sites More sharing options...
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