Monday, January 4, 2016

Φιλοσοφικό Τηλεγράφημα: Βλέπω. Όπως λέμε «Αναλύω»…

Φιλοσοφικό Τηλεγράφημα του Σπύρου Κάκου [2016-01-04]:

Επιστήμονες εξετάζουν τα δεδομένα μιας λάμψης ακτίνων Χ από μία μαύρη τρύπα…

After careful scrutiny of the data, the astronomers realized they were seeing the ejection, and eventual collapse, of the black hole's corona.

"The corona gathered inward at first and then launched upwards like a jet," said Wilkins. "We still don't know how jets in black holes form, but it's an exciting possibility that this black hole's corona was beginning to form the base of a jet before it collapsed."

How could the researchers tell the corona moved? The corona gives off X-ray light that has a slightly different spectrum -- X-ray "colors" -- than the light coming from the disk around the black hole. By analyzing a spectrum of X-ray light from Mrk 335 across a range of wavelengths observed by both Swift and NuSTAR, the researchers could tell that the corona X-ray light had brightened -- and that this brightening was due to the motion of the corona. Coronas can move very fast. The corona associated with Mrk 335, according to the scientists, was traveling at about 20 percent the speed of light. When this happens, and the corona launches in our direction, its light is brightened in an effect called relativistic Doppler boosting.

Putting this all together, the results show that the X-ray flare from this black hole was caused by the ejected corona.


Νομίζουμε ότι είναι κάτι τόσο απλό. Τόσο ξεκάθαρο. Και όμως δεν είναι.


Όπως λέμε «Αναλύω, σκέφτομαι, καταγράφω τις πιθανότητες, αποφασίζω, βγάζω συμπεράσματα»…

Δεν υπάρχουν εμπειρικά δεδομένα. Μόνο σκέψη.

Βλέπεις τώρα;

(c) Φιλοσοφικά Τηλεγραφήματα - Φιλοσοφικός σχολιασμός της επικαιρότητας…

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