INPhINIT Incoming PhD: " Understanding how exoplanets are born, how they mature and how they survive the death of their star"

Deadline: 
2020-02-04
Type: 
INPhINIT PhD
Code: 
IN_01
Pilar: 
(1) Towards the understanding of the planetary systems
Introduction: 

CARMENES consortium and instrument study planetary systems and their stars. We focus on very small stars because of the great interest they present for the discovery of habitable exo-Earths. To this aim, our group built CARMENES, an instrument, the first of its kind worldwide, currently in operation at CAHA observatory, to detect habitable exoplanets.

The closest stellar neighbour to our Sun is Proxima Centauri, a small M dwarf, the most abundant type of stars in our Galaxy and the nearest in distance to our Sun. We know that, according to observations, most of them host planetary systems. To understand them better, we need to accurately determine the parameters and internal structure of the host stars and understand the physical processes behind their variability and the formation and dynamics of planets around them.

Most exciting is to learn about the evolution in time of the whole system. Stars form from enormous clouds of gas and dust. However, we do not know yet if their planets form from the same cloud, once it has collapsed to form a disk orbiting the star, or by coagulation of the dust into larger rocks to form the core of planets. We do not know well where they form within the disk or how they migrate to form the mature, close-in systems that we observe. This is due, mainly, to the fact that there are extremely few detections of protoplanets with the RV technique, which would provide accurate minimum masses and orbital parameters for these objects.

At the other end of the star’s life, we have not detected yet exoplanets around white dwarfs (WDs), the final fate of stars like our Sun. Their detection would probe the evolution of planetary systems during the late stellar evolutionary phases to learn about the fate of our own Solar System. Searches using the classical RV monitoring are hampered by the shape of the light (the spectrum) emitted by these stars. However, material falling onto the WD from an orbiting debris disk produces signatures that make this RV monitoring possible.

Tasks: 

One of the main objectives of the Severo Ochoa program at the IAA is the scientific exploitation of CARMENES to detect a whole population of exoplanets and to characterize their atmospheres. Therefore, we work in all possible aspects of these systems, from the general statistics and physics of the formation and evolution of exoplanets and their atmospheres to the internal structure of their stars. The group includes people with experience in theory, observations, instrumentation and management.

The main objective of the research line proposed for this fellowship is the study of planetary systems and their stars in time.

Therefore, we welcome graduates interested in research lines in astrophysics related with stellar physics (asteroseismology, magnetic activity), formation and evolution of planetary systems and their stars, (formation, characterization, evolution and dynamics of planets, stars and debris disks) and observations of exoplanet atmospheres.

Period (months): 
36 months

IAA is an equal opportunity institution. Applications to this program by female scientists are particularly encouraged.

Should you need any further information or assistance concerning the application, please contact the IAA at severoochoa[at]iaa.es