8/13/2019 Journal Club Astrobiologia Aviso Sep7

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Club de Revistas en Astrobiologa - Parque Explora, Martes 6 p.m.http!!groups.google."om!group!exobiologia

Martes # de $eptiembre de %&'&

Jupiter friend or foe? III : the Oortcloud comets

(orner et al., )nt.*.Astrobiolog+olume , umber ', %&'&

)t has long been assumed that the planet *upiter a"ts as a giant shield, signi/i"antl+lo0ering the impa"t rate o/ minor bodies on Earth. (o0ever, until re"entl+, ver+ little 0or1had been "arried out examining the role pla+ed b+ *upiter in determining the /requen"+ o/su"h "ollisions. )n this 0or1, the third o/ a series o/ papers, 0e examine the degree to0hi"h the impa"t rate on Earth resulting /rom the 2ort "loud "omets is enhan"ed orlessened b+ the presen"e o/ a giant planet in a *upiter-li1e orbit, in an attempt to more/ull+ understand the impa"t regime under 0hi"h li/e on Earth has developed. 2ur results

sho0 that the presen"e o/ a giant planet in a *upiter-li1e orbit signi/i"antl+ alters theimpa"t rate o/ 2ort "loud "omets on Earth, de"reasing the rate as the mass o/ the giantplanet in"reases. 3he greatest bombardment /lux is observed 0hen no giant planet ispresent.

Coordinan Jorge Zuluaga (Pregrado de Astronoma U. de A.), Andrs Ruiz (Escuela Explora, ParueExplora), Jorge E. !ueno ("rupo de Astro#iologa U$A%&!ogot')

Apoyan )nstituto de Astrobiologa, 4niversidad de Antioquia, Parque Explora

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