The Complete Census of 70 μm–Bright Debris Disks within “The Formation and Evolution of Planetary Systems”SpitzerLegacy Survey of Sun‐like Stars

AbstractAlthough a stellar age accuracy of about 10 % seems to be a reasonable requirement to draw a time line in the evolution of our Galaxy as well as in the formation and evolution of exo-planetary systems, theoretical stellar models are at present still too imperfect to really achieve this goal. Asteroseismic observations are definitely of invaluable assistance, especially if individual pulsation frequencies are available, which is still far from common. Large stellar samples are now in the spotlight with two different lines of attack, spectroscopic and photometric surveys as well as asteroseismic missions. I shall review the problems arising from stellar physics in the context of large stellar samples of main sequence and red giant stars, and I shall raise some alarm bells but also highlight some positive news for a drastic improvement in stellar age determinations below the limit of 10 % in a foreseeable future.

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Planet forming disks, debris disks and the Solar System

Proceedings of the International Astronomical Union ◽

10.1017/s1743921319009153 ◽

2019 ◽

Vol 15 (S350) ◽

pp. 207-215

Author(s):

Inga Kamp

Keyword(s):

Chemical Composition ◽

Solar System ◽

Planetary Systems ◽

Theoretical Work ◽

Structure Evolution ◽

Debris Disks ◽

Physical Processes ◽

Disk Structure ◽

Open Questions ◽

Evolution Modeling

AbstractVLT instruments and ALMA with their high spatial resolution have revolutionized in the past five years our view and understanding of how disks turn into planetary systems. This talk will briefly outline our current understanding of the physical processes occurring and chemical composition evolving as these disks turn into debris disks and eventually planetary systems like our own solar system. I will especially focus on the synergy between disk structure/evolution modeling and astrochemical laboratory/theoretical work to highlight the most recent advances, and open questions such as (1) how much of the chemical composition in disks is inherited from molecular clouds, (2) the relevance of snowlines for planet formation, and (3) what is the origin of the gas in debris disks and what can we learn from it. For each of the three, I will outline briefly how the combination of theory/lab astrochemistry, astrophysical models and observations are required to advance our understanding.

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Exploring the Cosmic Context of Earth

Proceedings of the International Astronomical Union ◽

10.1017/s1743921313012581 ◽

2012 ◽

Vol 8 (S293) ◽

pp. 77-83

Author(s):

Martin Dominik

Keyword(s):

Solar System ◽

Milky Way ◽

Planetary Systems ◽

Habitable Planets ◽

Detection Techniques ◽

The Earth ◽

Gravitational Microlensing ◽

Comprehensive Picture ◽

Formation And Evolution

AbstractStudying the amazingly diverse planet zoo provides us with unprecedented opportunities for understanding planet Earth and ultimately ourselves. An assessment of a planet's “habitability” reflects our Earth-centric prejudice and can serve to prioritise targets to actually search for signatures of life similar to ours. The probability for life beyond Earth to exist however remains unknown, and studies on habitability or statistics of planetary systems do not change this. But we can leave speculation behind, and embark on a journey of exploration. A sample of detected cosmic habitats would provide us with insight on the conditions for life to emerge, develop, and sustain, but disentangling the biota fraction from the duration of the biotic era would depend particularly on our knowledge about the dynamics of planetary systems. Apart from the fact that planets usually do not come alone, we also must not forget that the minor bodies in the Solar system vastly outnumber the planets. A focus on just what we might consider “habitable” planets is too narrow to understand their formation and evolution. While uniqueness prevents understanding, we need to investigate the context and embrace diversity. A comprehensive picture of planet populations can only arise by exploiting a variety of different detection techniques, where not only Kepler but also gravitational microlensing can now enter hitherto uncharted territory below the mass or size of the Earth. There is actually no shortage of planets, the Milky Way alone may host hundreds of billions, and so far we have found only about 1000.

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Analysis of the Chemical Composition of the Atmospheres of Stars with Debris Disks and Planetary Systems

Astrophysics ◽

10.1007/s10511-013-9300-y ◽

2013 ◽

Vol 56 (4) ◽

pp. 461-471

Author(s):

M. Rojas ◽

N. A. Drake ◽

C. Chavero ◽

C. B. Pereira ◽

A. F. Kholtygin ◽

...

Keyword(s):

Chemical Composition ◽

Planetary Systems ◽

Debris Disks

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Characterizing planetesimal belts through the study of debris dust

Proceedings of the International Astronomical Union ◽

10.1017/s1743921311019934 ◽

2010 ◽

Vol 6 (S276) ◽

pp. 54-59

Author(s):

Amaya Moro-Martín

Keyword(s):

Solar System ◽

Main Sequence ◽

Planetary Systems ◽

Dust Particles ◽

Debris Disks ◽

Main Sequence Stars ◽

Wide Range ◽

Robust Process

AbstractMain sequence stars are commonly surrounded by disks of dust. From lifetime arguments, it is inferred that the dust particles are not primordial but originate from the collision of planetesimals, similar to the asteroids, comets and KBOs in our Solar system. The presence of these debris disks around stars with a wide range of masses, luminosities, and metallicities, with and without binary companions, is evidence that planetesimal formation is a robust process that can take place under a wide range of conditions. Debris disks can help us learn about the formation, evolution and diversity of planetary systems.

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Dusty debris disks: First light from exosolar planetary systems

EAS Publications Series ◽

10.1051/eas/1041010 ◽

2010 ◽

Vol 41 ◽

pp. 133-154

Author(s):

P. Kalas

Keyword(s):

Planetary Systems ◽

Debris Disks

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The Formation and Evolution of Planetary Systems: SIRTF Legacy Science in the VLT Era

The Origins of Stars and Planets: The VLT View - ESO Astrophysics Symposia ◽

10.1007/978-3-662-40277-1_60 ◽

2002 ◽

pp. 461-470

Author(s):

M. R. Meyer ◽

D. Backman ◽

S. V. W. Beckwith ◽

T. Y. Brooke ◽

J. M. Carpenter ◽

...

Keyword(s):

Planetary Systems ◽

Formation And Evolution

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Orbital Dynamics and the Evolution of Planetary Habitability in the AU Mic System

The Astronomical Journal ◽

10.3847/1538-3881/ac366b ◽

2021 ◽

Vol 163 (1) ◽

pp. 20

Author(s):

Stephen R. Kane ◽

Bradford J. Foley ◽

Michelle L. Hill ◽

Cayman T. Unterborn ◽

Thomas Barclay ◽

...

Keyword(s):

Initial Conditions ◽

Planetary Systems ◽

Transitional Period ◽

Dynamical Analysis ◽

Habitable Zone ◽

Long Term Stability ◽

Formation And Evolution ◽

Planetary Habitability

Abstract The diverse planetary systems that have been discovered are revealing the plethora of possible architectures, providing insights into planet formation and evolution. They also increase our understanding of system parameters that may affect planetary habitability, and how such conditions are influenced by initial conditions. The AU Mic system is unique among known planetary systems in that it is a nearby, young, multiplanet transiting system. Such a young and well-characterized system provides an opportunity for orbital dynamical and habitability studies for planets in the very early stages of their evolution. Here, we calculate the evolution of the Habitable Zone of the system through time, including the pre-main-sequence phase that the system currently resides in. We discuss the planetary atmospheric processes occurring for an Earth-mass planet during this transitional period, and provide calculations of the climate state convergence age for both volatile rich and poor initial conditions. We present results of an orbital dynamical analysis of the AU Mic system that demonstrate the rapid eccentricity evolution of the known planets, and show that terrestrial planets within the Habitable Zone of the system can retain long-term stability. Finally, we discuss follow-up observation prospects, detectability of possible Habitable Zone planets, and how the AU Mic system may be used as a template for studies of planetary habitability evolution.

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