Re: ¿Hace un EJH de la astronomía?
Publicado: 25 Feb 2021 14:49
El señor científico o el periodista, vete tu a saber, dice que hielo...
Ahora en serio, aquí tienes la fuente original:
https://advances.sciencemag.org/content/7/8/eabc0444
Creo que aquí, te da la pista
"Location of the water ice line in the solar protoplanetary disc
Planetesimal formation by the streaming instability requires that the ratio of the surface density of pebbles relative to that of the gas is elevated above a threshold metallicity, higher than the nominal solar value, to trigger the formation of dense filaments that collapse to form planetesimals (25). Such an increased pebble density has been demonstrated to occur early in the evolution of the protoplanetary disc by pileup of dust released by icy pebbles interior of the water ice line (26) or by the deposition of water vapor transported by diffusion to exterior of the ice line (27, 28). We therefore assume in our model that an early generation of planetesimals formed at the water ice line and that the planetesimals that grew to form Venus, Earth, Theia, and Mars were among them.
The orbital distance of the water ice line depends on the luminosity of the young Sun as well as on the efficiency of viscous heating by the gas that is accreted. We present here both a model where viscous heating is provided at all distances from the star as well as a more realistic model where viscous heating is only provided when the magnetorotational instability is active above T = 800 K (29). This “dead zone” model is described in detail in Materials and Methods."
No me he leido el artículo en profundidad porque para mí requeríría un superplus de concentración que seguramente me secaría el cerebro del todo. Son muy cortico en general, en particular además me cuestan horrores y sudores frios las mateméticas y los idiomas, así que este artículo lo tiene todo para que una vez leido en profundidad os acabe contando que un científico asegura que mañana nos invaden los aliens y que rompamos a follar ya. luego follaremos todos y no pasará nada y sería un desperdicio de energia. Pero si a alguno de vosotros, gente lista del PH, le apetece leerlo me sentiría muy pheliz de ller luego vuestra opinión sobre el mismo.
Ahora en serio, aquí tienes la fuente original:
https://advances.sciencemag.org/content/7/8/eabc0444
Creo que aquí, te da la pista
"Location of the water ice line in the solar protoplanetary disc
Planetesimal formation by the streaming instability requires that the ratio of the surface density of pebbles relative to that of the gas is elevated above a threshold metallicity, higher than the nominal solar value, to trigger the formation of dense filaments that collapse to form planetesimals (25). Such an increased pebble density has been demonstrated to occur early in the evolution of the protoplanetary disc by pileup of dust released by icy pebbles interior of the water ice line (26) or by the deposition of water vapor transported by diffusion to exterior of the ice line (27, 28). We therefore assume in our model that an early generation of planetesimals formed at the water ice line and that the planetesimals that grew to form Venus, Earth, Theia, and Mars were among them.
The orbital distance of the water ice line depends on the luminosity of the young Sun as well as on the efficiency of viscous heating by the gas that is accreted. We present here both a model where viscous heating is provided at all distances from the star as well as a more realistic model where viscous heating is only provided when the magnetorotational instability is active above T = 800 K (29). This “dead zone” model is described in detail in Materials and Methods."
No me he leido el artículo en profundidad porque para mí requeríría un superplus de concentración que seguramente me secaría el cerebro del todo. Son muy cortico en general, en particular además me cuestan horrores y sudores frios las mateméticas y los idiomas, así que este artículo lo tiene todo para que una vez leido en profundidad os acabe contando que un científico asegura que mañana nos invaden los aliens y que rompamos a follar ya. luego follaremos todos y no pasará nada y sería un desperdicio de energia. Pero si a alguno de vosotros, gente lista del PH, le apetece leerlo me sentiría muy pheliz de ller luego vuestra opinión sobre el mismo.
