Esistenza del "Naked" buco nero può ripartizione leggi della fisica nell'universo

Computer simulations indicate that a “naked” black hole may yet emerge in our universe, after spinning away its event horizon, which would lead to the breakdown of the laws of physics.

In 1969, physicist Roger Penrose postulated that every singularity, or black hole, must be shrouded by an event horizon from which nothing, including light, can escape.

L'orizzonte di evento è il campo gravitazionale di un buco nero, dove lo spazio-tempo è piegato in modo che la luce non può sfuggire.

But, according to a report in New Scientist, simulations developed by Ted Jacobson and Thomas Sotiriou at the University of Maryland at College Park indicates that a black hole may emerge in the Universe that has escaped its event horizon.

Se questo vale, sarebbe cattive notizie per cosmologi perché se le leggi della fisica non possono descrivere anche una posizione nell'universo, il futuro dell'universo – come previsto da tali leggi – è gettato nel dubbio.

La nostra descrizione di fotoni, per esempio, potrebbe essere compromessa perché quei fotoni possono hanno interagito con una singolarità nudo mentre zippare attraverso l'universo.

In teoria, aggiungendo la questione a un buco nero poteva farlo girare abbastanza velocemente a gettare il suo orizzonte di eventi, ma in precedenza, i fisici hanno calcolato che la rotazione di buchi neri ha un limite di velocità intrinseco che impedisce a tale spargimento.

Questo limite è in parte determinato dal tornado vortice di spazio-tempo che circonda un buco nero di filatura.

Simulazioni passati ha dimostrato che se il materiale è stato aggiunto che ha reso spazio-tempo swirl più veloce, aggiungendo ancora più materiale sarebbe sempre più difficile perché la maggiore forza centrifuga potrebbe scagliare verso l'esterno prima che esso potrebbe raggiungere evento orizzonte del buco nero, lo spin up e disturbare.

Collassano questione può compromettere evento orizzonte di un buco nero, esponendo una singolarità 'naked'.

Tuttavia, queste simulazioni ha iniziato aggiungendo la questione a un buco nero di filatura all'aliquota massima possibile, secondo la Jacobson e Sotiriou.

Hanno simulato aggiungendo questione orbita nella stessa direzione di un buco nero appena sotto il tasso massimo di filatura.

Loro lavoro suggerisce che l'orizzonte di evento potrebbe quindi essere interrotto e capannone.

Tutto l'universo, compreso il cuore della nostra galassia, la materia è vorticoso in buchi neri e filatura li più velocemente, quindi è possibile che Jacobson e del Sotiriou scenario potrebbe verificarsi. (ANI)

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articolo originale :

http://www.newspostonline.com/science/naked-black-holes-existence-may-breakdown-laws-of-physics-in-universe-2009081365766

Computer simulations indicate that a “naked” black hole may yet emerge in our universe, after spinning away its event horizon, which would lead to the breakdown of the laws of physics.

In 1969, physicist Roger Penrose postulated that every singularity, or black hole, must be shrouded by an event horizon from which nothing, including light, can escape.

The event horizon is the gravity field of a black hole where the space-time is so bent that light cannot escape it.

But, according to a report in New Scientist, simulations developed by Ted Jacobson and Thomas Sotiriou at the University of Maryland at College Park indicates that a black hole may emerge in the Universe that has escaped its event horizon.

If this holds true, it would be bad news for cosmologists because if the laws of physics cannot describe even one location in the universe, the future of the universe – as predicted by those laws – is cast into doubt.

Our description of photons, for instance, may be undermined because those photons may have interacted with a naked singularity while zipping across the universe.

In theory, adding matter to a black hole could make it spin fast enough to shed its event horizon, but previously, physicists have calculated that the spin of black holes has an inherent speed limit that prevents such shedding.

This limit is partly determined by the swirling tornado of space-time that surrounds a spinning black hole.

Past simulations showed that if material was added that made space-time swirl faster, adding yet more material would be increasingly difficult because the increased centrifugal force might fling it outwards before it could reach the black hole’s event horizon, spin it up and disrupt it.

Infalling matter can disrupt a black hole’s event horizon, exposing a ‘naked’ singularity.

However, these simulations began by adding matter to a black hole spinning at its maximum possible rate, according to Jacobson and Sotiriou.

They simulated adding matter orbiting in the same direction to a black hole spinning just below its maximum rate.

Their work suggests that the event horizon could then be disrupted and shed.

All over the universe, including the heart of our galaxy, matter is swirling into black holes and spinning them faster, so it is possible that Jacobson and Sotiriou’s scenario could occur. (ANI)

 

 

 

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http://www.systran.co.uk/  http://translate.google.it/translate_t  traslator in any language 

 antigravitation, force physique présentée comme une hypothèse qui frésiste à la force de gravité (Physique) antigravitación (en física - fuerza hipotética contraria a la fuerza de la gravitación) antigravitatie (in fysica-hypothetische kracht tegengesteld aan aantrekkingskracht) anti-gravidade, força hipotética contrária à força da gravidade Antigravität (in der Physik der Anziehungskraft entgegenwirkende Kraft)

Антигравитация
Антигравитация — недоказанное явление гравитационного отталкивания или подавления притяжения, якобы существующее или имеющее возможность на существование наряду с обычным гравитационным притяжением.Как литературный приём, была неоднократно использована, например, Алексеем Толстым в Аэлите, Николаем Носовым в Незнайке на ЛунеУэллсом в романе Первые люди на луне.

Με την έννοια της αντιβαρύτητας (antigravity) εννοούμε μία υποθετική δράση η οποία αντιτίθεται στην επίδραση της βαρύτητας. Η αντιβαρύτητα μέχρι σήμερα δεν αποτελεί επίσημο και αυστηρά καθορισμένο επιστημονικό όρο. Χρησιμοποιείται γενικά για να υποδηλώσει την κατανίκηση της βαρύτητας με τη βοήθεια κάποιων τεχνητών μεσων, αλλά επίσης χρησιμοποιείται και στην προσπάθεια εξήγησης της επιταχυνόμενης διαστολής του σύμπαντος. Μέχρι σήμερα η επιστήμη δεν έχει καταφέρει να αποδείξει την ύπαρξη μίας τέτοιας δύναμης, όπως επίσης και οι υφιστάμενοι φυσικοί νόμοι δεν προβλέπουν την ύπαρξή της (ούτε όμως την απαγορεύουν). Παρ΄όλα αυτά, υπάρχουν αρκετές θεωρίες, μελέτες και πειράματα που ασχολούνται με τους τρόπους με τους οποίους θα ήταν δυνατό να επιτευχθούν φαινόμενα αντιβαρύτητας, αλλά και να εξηγήσουν επίσης την επιταχυνόμενη διαστολή του σύμπαντος. Μεταξύ αυτών, ορισμένα υπονοούν και την ανάγκη ύπαρξης της επίσης υποθετικής, εξωτικής αρνητικής μάζας (πχ μοντέλο σκουληκότρυπας, Alcubierre ή warp drive). ÇEKİM KESME ETKİSİ:Mahiyeti henüz keşfedilmemiş bir enerji sahasının, roket araçları ve insan vücudu gibi kütleler üzerinde yer çekim kuvvetini kaldırdığı veya azalttığı sanılan etki

(ש"ע) אנטיגרביטציה (בפיסיקה-כוח היפותטי המנוגד לכוח המשיכה)

ثقالة مضادة
الثقالة المضادة (Anti-gravity) هي قوى كونية تعتبر معاكسة لقوى الجاذبية. يعتقد بعض العلماء أنها القوى الغامضة التي تؤثر على المركبات الفضائية. رغم الجهود المبذولة، لم يستطع أحد إلى يومنا هذا إثبات وجود هذه القوى. تعتبر هذه القوى من المواضيع الرائجة في الروايات والأفلام العلمية الخيالية.من خلال صورة لأبعد مستعر أعظم بالفضاء التقطها تلسكوب (هبل) الفضائي وجد العلماء قوة مضادة للجاذبية غامضة تجعل الكون يتمدد بمعدل تسارعي منتظم. وهذا الاكتشاف يدعم مفهوما سبق لأينشتين اقتراحه من خلال مقولته عن الثابت الكوني (cosmological constant) ثم استبعده قائلا: هذه أكبر غلطة في عمري، فلقد كان لاكتشاف هذا المستعر مثارا للدهشة لفريق البحث ومن بينه الفلكي آدم ريس من جامعة بريكلي بكاليفورنيا. ولقد حاول الفريق المكون من 15 عالما البحث عن أخطاء ما في هذا الكشف الغريب فلم يجدوها.لأنه لو صح فإنه سيتحدى الأفكار السائدة عن تاريخ الفضاء والزمن. لأنهم اكتشفوا القوة مستعينين بتلسكوب هبل الفضائي والتلسكوبات الأرضية في هاواي وأستراليا وتشيلي. وعندما حللوا الضوء الوافد من 14 مستعر أعظم (نجوم متفجرة) تبعد عن الأرض بحوالي 7– 10 بليون سنة ضوئية (السنة الضوئية تعادل 6تريليون ميل) . وكان العلماء يتوقعون أن تمدد الكون متباطئ قليلا بتأثير الجاذبية.لكنه في الواقع يتسارع وسوف يستمر لدرجة أن كثيرا من الhjhjhjhنجوم التي نراها سوف تختفي بعد بلايين السنين ولن نراها وسيكون الكون مكانا مختلفا عما ألفنا عليه في رؤيتنا وسيكون فريدا. فلو كان تمدد الكون متسارعا فإن هذا معناه حل مسألة قياس عمر الكون لعشرة بلايين سنة . وهذا يعتبر عمرا أصغر وأقصر من عمر بعض النجوم . وهذا التضارب كانت متاهة واجهت الفلكيين . لكن لو كان معدل التسارع لتمدد الكون قدر .. فإن عمر الكون يناهز علي 14 بليون سنة . وهذا معناه أنه أقدم من أقدم النجوم ببليوني سنة.
antityngdkraft (fysik-motstånd till tyngdkraften)
Anti-gravity
Anti-gravity is the hypothetical idea of creating a place or object that is free from the force of   gravity . It does not refer to countering the gravitational force by an opposing force of a different nature, as a helium ballon  does; instead, anti-gravity requires that the fundamental causes of the force of gravity be made either not present or not applicable to the place or object through some kind of technological intervention. Anti-gravity is a recurring theme in science function , particularly in the context of spacecraft propulsion . The concept was first introduced formally as "Carvorite"  and has been a favorite  deus is macchina  since that day.