Protoplanetary disks

Session

Disk accretion and star-disk interaction (chair B. Stelzer)

26 Jun 2018, 09:00

13. The TNG and its instruments after 20 years of operations (I)

Ennio Poretti (Fundacion Galileo Galilei - INAF )

26/06/2018, 09:00

Talk

TNG is operative since 20 years. We will briefly review the
changes occurred in these 20 years and how the current focal plane
instrumentation has been updated to face the open problems of
modern astrophysics. A look to the near future is also indispensable:
inputs from the community are welcome.

39. Understanding the evolution of mass accretion to explain the evolution of disks (I)

Carlo Felice Manara (ESO)

26/06/2018, 09:30

Low-mass pre-main-sequence stars interact with their surrounding protoplanetary disks through accretion of material onto the star and emission of material through winds. These processes regulate the evolution of protoplanetary disks and thus their ability to form planets.

Star-disk interaction processes are best studied spectroscopically. Instruments like the VLT/X-Shooter spectrograph allow...

11. The inner astronomical units of protoplanetary disks: and interferometric view

Rebeca Garcia Lopez (DIAS)

26/06/2018, 10:00

Talk

The physical structure and processes in the inner regions of protoplanetary disks within 5 au from the source are still poorly constrained, yet they are key for understanding planet formation. Only recently, IR interferometers have been able to perform the first statistical study of the dust in the inner disk, but a similar study on the gas is still lacking.
In this talk, I will present the...

31. Modeling the spin evolution of classical TTauri stars

Claudio Zanni (Istituto Nazionale di Astrofisica (INAF))

26/06/2018, 10:20

Talk

The spin evolution of classical TTauri stars (CTTS) represents a puzzling problem. Since they are still contracting and accreting, these protostars would be expected to spin-up at breakup speed in a few million years. On the other hand, as soon as they emerge from the Class 0-I embedded phases, they are observed to rotate with periods between 1-10 days, well below their breakup limit. In...

40. Accretion variability in young, low mass stars (I)

Laura Venuti

26/06/2018, 11:10

Talk

We present and discuss the manifold photometric behaviors of young, low-mass stars with active accretion disks. This review is based on results from recent space-borne missions, most notably CoRoT and Kepler/K2. Thanks to their sub-1% photometric precision, sub-hour time sampling, and continuous time coverage for spans of weeks to months, these campaigns have provided first detailed atlases of...

12. Mass accretion rates from HST data: the case of LH95 in the Large Magellanic Cloud

Katia Biazzo (Istituto Nazionale di Astrofisica (INAF))

26/06/2018, 11:40

Talk

We present recent results on accretion properties of low-mass stars in the metal-poor star forming region (SFR) LH95 within the Large Magellanic Cloud (LMC). Using optical and Halpha photometry obtained with the Hubble Space Telescope, we identify, within the initial catalogue of about 25000 sources, 245 bona fide pre-main sequence (PMS) stars with Halpha excess emission, for which we measure...

33. Multi-wavelength and multi-disciplinary approach to the study of the emission from accretion/ejection processes in young stars with disks: combining observations, numerical models, and laboratory experiments

Rosaria Bonito (Istituto Nazionale di Astrofisica (INAF))

26/06/2018, 12:00

Talk

A multi-band investigation of the emission from young stars with disks allows us to obtain a complete characterization of these complex systems, accounting for their accretion and outflow activity.
All the components contributing to the emission can strongly influence also the evolution of their disks and possibly the formation of exo-planetary systems.
Combining multi-wavelength...

61. Discussion on accretion (Juan Alcala' moderator)

26/06/2018, 12:20