New Mechanism for the String Like Debris Effect of Stars Consumed by Black Holes

The traditional Tidal Disruption Event (TDE) theory holds that when a star approaches a black hole, the tidal gravitational gradient of the black hole exceeds the star self gravity, directly tearing apart the solid star and producing elongated material streams. This physical model implicitly relies on two key mechanical premises. First, tearing a solid body requires opposing resistance or external obstruction. Second, mechanical failure of a solid celestial body results in brittle fracture. However, no external obstruction exists as a star falls into the vortex field of a black hole. If only tidal gravitational gradients act on the star, there are only two possible outcomes. Either the entire star is dragged and accreted as a whole. Or, even if tidal stresses were hypothetically strong enough to destroy the star, the solid material would undergo brittle fracture and split into two or several large fragments. Continuous, extended filament or worm like material streams cannot be produced. The traditional model suffers fundamental logical flaws. This paper proposes a melt drag stretching mechanism. When a star enters the vortex environment of a black hole, numerous outward propagating high energy gamma ray photons persist in the vicinity of the black hole, forming a wide range high temperature environment through photon energy transport. The side of the star facing the black hole preferentially receives photon energy, rises in temperature and melts first, and the original crystalline solid bonding structures disappear. The rear portion of the star still retains solid material structures. Driven by the black hole vortex force, the molten material obtains high velocity, while the rear solid component moves relatively slowly. Material drag coupling exists between the molten front and the rear solid portion. The high speed molten material continuously stretches outward, and the material filaments grow longer and longer. Stellar melting is a gradual gradient process rather than one off overall gasification. The phase transition at the front consumes local thermal energy and causes a temporary regional temperature drop. Photon heat near the black hole is continuously supplied outward and conducted backward, enabling the solid material at the rear to melt step by step and continuously replenish the filament flow, sustaining large scale filament or worm like structures in the end. It should be noted that the resulting filamentary material is partially molten and not fully dissociated. Most of this filamentary material is eventually accreted by the black hole. Without assuming that tidal gravity directly rips apart solid stars, the present mechanism provides a self consistent physical explanation for the filamentary debris flows observed in tidal disruption events.