The dusty disk and companion of L2 Puppis, a near AGB star, observed with VLT/SPHERE

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1 Characteristics VLT/NACO observations VLT/SPHERE observations Open questions The dusty disk and companion of L2 Puppis, a near AGB star, observed with VLT/SPHERE M. Montargès (IRAM), P. Kervella (CNRS/U. de Chile UMI FCA), E. Lagadec (Lagrange), S. T. Ridgway (NOAO), and many others... Stellar End Product: The Low Mass - High Mass Connection ESO Garching - July 8th 2015 M. Montargès - STEPS 2015 Garching The dusty disk and companion of L2 Puppis, a near AGB star, observed with VLT/SPHERE 1/14

2 L2 Puppis ID card (ESO/DSS2) M5III, SRa (Mira-like) P = 141 days 0.7 M < M < 2 M Probable binary from Hipparcos astrometry 2 nd nearest AGB star (64 ± 4 pc, m V 5) M. Montargès - STEPS 2015 Garching The dusty disk and companion of L2 Puppis, a near AGB star, observed with VLT/SPHERE 2/14

3 Dimming event M. Montargès - STEPS 2015 Garching The dusty disk and companion of L2 Puppis, a near AGB star, observed with VLT/SPHERE 3/14

4 Dimming event M. Montargès - STEPS 2015 Garching The dusty disk and companion of L2 Puppis, a near AGB star, observed with VLT/SPHERE 3/14

5 VLT/NACO µm (March 2013) Kervella, Montargès et al. 2014, A&A, 564, A88 AO instrument, 12 narrow band filters in JHKL bands Lucky-imaging technique (5 000 exposures of 5 ms) Observation of a PSF for image deconvolution (β Col) M. Montargès - STEPS 2015 Garching The dusty disk and companion of L2 Puppis, a near AGB star, observed with VLT/SPHERE 4/14

6 VLT/NACO µm (March 2013) Kervella, Montargès et al. 2014, A&A, 564, A88 AO instrument, 12 narrow band filters in JHKL bands Lucky-imaging technique (5 000 exposures of 5 ms) Observation of a PSF for image deconvolution (β Col and α Lyn) M. Montargès - STEPS 2015 Garching The dusty disk and companion of L2 Puppis, a near AGB star, observed with VLT/SPHERE 4/14

7 Characteristics VLT/NACO observations VLT/SPHERE observations Open questions VLT/NACO (March 2013) - Deconvolved images M. Montargès - STEPS 2015 Garching The dusty disk and companion of L2 Puppis, a near AGB star, observed with VLT/SPHERE 5/14

8 2.17 µm : VLT/NACO vs VLTI/AMBER M. Montargès - STEPS 2015 Garching The dusty disk and companion of L2 Puppis, a near AGB star, observed with VLT/SPHERE 6/14

9 2.17 µm : VLT/NACO vs VLTI/AMBER M. Montargès - STEPS 2015 Garching The dusty disk and companion of L2 Puppis, a near AGB star, observed with VLT/SPHERE 6/14

10 Characteristics VLT/NACO observations VLT/SPHERE observations Open questions VLT/NACO (March 2013) - Model Images M. Montargès - STEPS 2015 Garching The dusty disk and companion of L2 Puppis, a near AGB star, observed with VLT/SPHERE 7/14

11 VLT/NACO (March 2013) - Composite image Results with NACO Dusty disk seen almost edge-on Modeling: photometry + shape M. Montargès - STEPS 2015 Garching The dusty disk and companion of L2 Puppis, a near AGB star, observed with VLT/SPHERE 8/14

12 VLT/NACO (March 2013) - Composite image Results with NACO Dusty disk seen almost edge-on Modeling: photometry + shape Questions Why a disk? What are its effects on the stellar wind? What is the loop in the L band? M. Montargès - STEPS 2015 Garching The dusty disk and companion of L2 Puppis, a near AGB star, observed with VLT/SPHERE 8/14

13 VLT/SPHERE (December 2014) VLT/SPHERE: ZIMPOL Extreme adaptive optics instrument Access to visible spectral domain 2 filters at the same time Q, U polarimetric measurements M. Montargès - STEPS 2015 Garching The dusty disk and companion of L2 Puppis, a near AGB star, observed with VLT/SPHERE 9/14

14 VLT/SPHERE (December 2014) M. Montargès - STEPS 2015 Garching The dusty disk and companion of L2 Puppis, a near AGB star, observed with VLT/SPHERE 9/14

15 VLT/SPHERE (December 2014) - L2 Pup B M. Montargès - STEPS 2015 Garching The dusty disk and companion of L2 Puppis, a near AGB star, observed with VLT/SPHERE 10/14

16 VLT/SPHERE (December 2014) - L2 Pup B Kervella, Montargès et al. 2015, A&A, 578, A77 M. Montargès - STEPS 2015 Garching The dusty disk and companion of L2 Puppis, a near AGB star, observed with VLT/SPHERE 10/14

17 VLT/SPHERE (December 2014) - Polarimetric signatures (Kervella, Montargès et al. 2015, A&A, 578, A77) M. Montargès - STEPS 2015 Garching The dusty disk and companion of L2 Puppis, a near AGB star, observed with VLT/SPHERE 11/14

18 VLT/SPHERE (December 2014) - Polarimetric signatures (Kervella, Montargès et al. 2015, A&A, 578, A77) M. Montargès - STEPS 2015 Garching The dusty disk and companion of L2 Puppis, a near AGB star, observed with VLT/SPHERE 11/14

19 VLT/SPHERE (December 2014) - Polarimetric signatures (Kervella, Montargès et al. 2015, A&A, 578, A77) M. Montargès - STEPS 2015 Garching The dusty disk and companion of L2 Puppis, a near AGB star, observed with VLT/SPHERE 11/14

20 VLT/SPHERE (December 2014) - Polarimetric signatures (Kervella, Montargès et al. 2015, A&A, 578, A77) M. Montargès - STEPS 2015 Garching The dusty disk and companion of L2 Puppis, a near AGB star, observed with VLT/SPHERE 11/14

21 VLT/SPHERE (December 2014) - Polarimetric signatures (Kervella, Montargès et al. 2015, A&A, 578, A77) M. Montargès - STEPS 2015 Garching The dusty disk and companion of L2 Puppis, a near AGB star, observed with VLT/SPHERE 11/14

22 VLT/SPHERE (December 2014) - Polarimetric signatures (Kervella, Montargès et al. 2015, A&A, 578, A77) M. Montargès - STEPS 2015 Garching The dusty disk and companion of L2 Puppis, a near AGB star, observed with VLT/SPHERE 11/14

23 VLT/SPHERE (December 2014) - Polarimetric signatures (Kervella, Montargès et al. 2015, A&A, 578, A77) M. Montargès - STEPS 2015 Garching The dusty disk and companion of L2 Puppis, a near AGB star, observed with VLT/SPHERE 11/14

24 VLT/SPHERE (December 2014) - Polarimetric signatures (Kervella, Montargès et al. 2015, A&A, 578, A77) M. Montargès - STEPS 2015 Garching The dusty disk and companion of L2 Puppis, a near AGB star, observed with VLT/SPHERE 11/14

25 VLT/SPHERE (December 2014) - Polarimetric signatures (Kervella, Montargès et al. 2015, A&A, 578, A77) M. Montargès - STEPS 2015 Garching The dusty disk and companion of L2 Puppis, a near AGB star, observed with VLT/SPHERE 11/14

26 VLT/SPHERE (December 2014) - Polarimetric signatures (Kervella, Montargès et al. 2015, A&A, 578, A77) M. Montargès - STEPS 2015 Garching The dusty disk and companion of L2 Puppis, a near AGB star, observed with VLT/SPHERE 11/14

27 VLT/SPHERE (December 2014) - Polarimetric signatures (Kervella, Montargès et al. 2015, A&A, 578, A77) M. Montargès - STEPS 2015 Garching The dusty disk and companion of L2 Puppis, a near AGB star, observed with VLT/SPHERE 11/14

28 VLT/SPHERE (December 2014) - Polarimetric signatures (Kervella, Montargès et al. 2015, A&A, 578, A77) M. Montargès - STEPS 2015 Garching The dusty disk and companion of L2 Puppis, a near AGB star, observed with VLT/SPHERE 11/14

29 VLT/SPHERE (December 2014) - Polarimetric signatures (Kervella, Montargès et al. 2015, A&A, 578, A77) M. Montargès - STEPS 2015 Garching The dusty disk and companion of L2 Puppis, a near AGB star, observed with VLT/SPHERE 11/14

30 VLT/SPHERE - Radiative transfer modeling 3D dust distribution model: RADMC-3D code (Dullemond 2012) Dusty disk seen almost edge-on AGB stellar disk partly hidden M. Montargès - STEPS 2015 Garching The dusty disk and companion of L2 Puppis, a near AGB star, observed with VLT/SPHERE 12/14

31 VLT/SPHERE - Radiative transfer modeling 3D dust distribution model: RADMC-3D code (Dullemond 2012) Dusty disk seen almost edge-on AGB stellar disk partly hidden Photometry and general morphology well reproduced M. Montargès - STEPS 2015 Garching The dusty disk and companion of L2 Puppis, a near AGB star, observed with VLT/SPHERE 12/14

32 VLT/SPHERE - Radiative transfer modeling (photometry) Flux (W.m 2.µm) RADMC-3D model SPHERE Kurucz 3500K Kurucz with extinction MIDI NACO Observations SPHERE Observations Photometry pre Wavelength (µm) Dusty disk model R in = 6 AU Incl. = 82 MgFeSiO 4 + MgFeSi 2 O 3 M dust = M = 0.08 M M. Montargès - STEPS 2015 Garching The dusty disk and companion of L2 Puppis, a near AGB star, observed with VLT/SPHERE 13/14

33 Open questions Formation of: - the plumes? - the streamers? Interaction AGB wind/dusty disk? Nature of companion? Dynamics? M. Montargès - STEPS 2015 Garching The dusty disk and companion of L2 Puppis, a near AGB star, observed with VLT/SPHERE 14/14

34 Open questions Formation of: - the plumes? - the streamers? Interaction AGB wind/dusty disk? Nature of companion? Dynamics? (NACO L band + SPHERE R band) Thank you for your attention! M. Montargès - STEPS 2015 Garching The dusty disk and companion of L2 Puppis, a near AGB star, observed with VLT/SPHERE 14/14

35 Backups M. Montargès - STEPS 2015 Garching The dusty disk and companion of L2 Puppis, a near AGB star, observed with VLT/SPHERE 15/14

36 Polarization law 70% 60% Degree of linear polarization pl 50% 40% 30% 20% 10% pmax=0.58 pmax=0.42 0% Scattering angle Theta (degrees) M. Montargès - STEPS 2015 Garching The dusty disk and companion of L2 Puppis, a near AGB star, observed with VLT/SPHERE 16/14

37 Altitude relatively to the plane of the sky M. Montargès - STEPS 2015 Garching The dusty disk and companion of L2 Puppis, a near AGB star, observed with VLT/SPHERE 17/14

38 Mass loss collimation Stellar wind Dust disk plane mas AU M. Montargès - STEPS 2015 Garching The dusty disk and companion of L2 Puppis, a near AGB star, observed with VLT/SPHERE 18/14

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