Protoplanetary disks

Session

Formation of protostellar disks and jets (chair S. Antoniucci)

1

25 Jun 2018, 15:00

35. Protostellar jets: the revolution with ALMA and NOEMA (I)

Linda Podio

25/06/2018, 15:00

Talk

Fast and collimated molecular jets as well as slower wide-angle outflows are observed since the earliest stages of the formation of a new star, when the protostellar embryo accretes most of its final mass from the dense parental envelope. Early theoretical studies suggested that jets have a key role in this process as they can transport away angular momentum thus allowing the star to form...

2. Jets, winds and accretion shocks around the protostellar system HH212 (I)

Eleonora Bianchi (Istituto Nazionale di Astrofisica (INAF))

25/06/2018, 15:30

Talk

Thanks to the unmatched combination of high-sensitivity and high-angular resolution provided by the new generation facilities such as ALMA and NOEMA, it is now possible to investigate in details the earliest stages of the Sun-like star formation. More specifically, the inner protostellar jet can be now imaged at spatial scales lower than 50 AU from the driving protostar, where the effects...

36. SKA (I)

Grazia Umana

25/06/2018, 16:00

3. Protostars: Forges of cosmic rays? (I)

Marco Padovani (Istituto Nazionale di Astrofisica (INAF))

25/06/2018, 17:00

Talk

It is largely accepted that Galactic cosmic rays, which pervade the interstellar medium, originate by means of shock waves in supernova remnants. Cosmic rays activate the rich chemistry that is observed in a molecular cloud and they also regulate its collapse timescale, determining the efficiency of star and planet formation, but they cannot penetrate up to the densest part of a molecular...

7. First disk-mediated accretion burst from a massive proto(star): how accretion turns into ejection

Alessio Caratti o Garatti (DIAS)

25/06/2018, 17:30

Talk

How massive stars form and evolve in their early phase is still debated. Here, we report on the discovery and follow-up of the first disk-mediated accretion burst from a 20 solar mass protostar, S255IR NIRS3. Our results strengthen the idea that massive stars form through disks via episodic accretion, pointing to a common formation mechanism across the entire stellar mass spectrum. Moreover,...

9. A far-infrared catalogue of dense cores and protostars in the Lupus complex

Milena Benedettini (INAF-IAPS)

25/06/2018, 17:50

Talk

I will present the catalogues of the dense cores and YSOs/protostars of the Lupus I, III, and IV molecular clouds, compiled with compact sources extracted from the five Herschel photometric maps between 70 and 500 micron. The physical properties of the detected objects were derived by fitting their spectral energy distributions. For YSOs/protostars a wide SED was built by complementing the...

54. HD142527: A crime scene investigation

Daniel Price

25/06/2018, 18:10

Talk

What is the origin of the large horseshoe, cavity, spiral arms. fast radial flows, warps and shadows in HD142527? I will present results of our recent attempts to model this mysterious disc, formerly regarded as a transitional disc. I will show that the interaction with the observed highly eccentric and inclined binary companion can explain most of the `weird’ phenomena in this disc,...