Probing companions of evolved stars

Transcription

1 Introduction Spiral-shell Summary Probing companions of evolved stars (ASIAA, EACOA fellow)... migrating to KASI ALMA long baseline Kyoto

2 Introduction Spiral-shell Summary Evolution Bipolar Accretion Credit: & Youngmin JeongAhn

3 Introduction Spiral-shell Summary Evolution Bipolar Accretion Credit: & Youngmin JeongAhn

4 Introduction Spiral-shell Summary Evolution Bipolar Accretion Bipolar planetary nebulae A torus is required to form a polar structure. In PNe, companions are needed (Soker 2004, 2006; Nordhaus et al. 2006) to gather (outflowing) material with its gravity to trigger B-fields required to sustain bipolar structures

5 Introduction Spiral-shell Summary Evolution Bipolar Accretion Binaries and Accretion (Attached binary) (Detached binary)

6 Introduction Spiral-shell Summary Evolution Bipolar Accretion Binaries and Accretion (Attached binary) (Detached binary) Mohamed 2010 hydrodynamic simulation for Mira O stars C stars < 10 km s M yr 1 > 10 km s M yr 1

7 Introduction Spiral-shell Summary Evolution Bipolar Accretion Binaries and Accretion (Attached binary) (Detached binary) Mohamed 2010 hydrodynamic simulation for Mira O stars C stars < 10 km s M yr 1 > 10 km s M yr 1

8 Introduction Spiral-shell Summary Evolution Bipolar Accretion Binaries Ramstedt et and al Accretion CO(3 2) Vlemmings et al Band 6 continuum Mohamed 2010 hydrodynamic simulation for Mira O stars C stars < 10 km s M yr 1 > 10 km s M yr 1

9 Introduction Spiral-shell Summary Obs. Model AFGL 3068 Arm spacing Fine structures Observed spirals/shells/arcs Arm spacing a couple arcsec scale

10 Introduction Spiral-shell Summary Obs. Model AFGL 3068 Arm spacing Fine structures Binaries, making spiral-shell patterns face-on edge-on Mastrodemos & Morris 1999; Kim & Taam 2012a,b,c

11 Introduction Spiral-shell Summary Obs. Model AFGL 3068 Arm spacing Fine structures Spiral or recurrent rings credit: Hsieh, Kim & Liu

12 Introduction Spiral-shell Summary Obs. Model AFGL 3068 Arm spacing Fine structures Spiral or recurrent rings or arcs credit: Hsieh, Kim & Liu

13 Introduction Spiral-shell Summary Obs. Model AFGL 3068 Arm spacing Fine structures ALMA example: Molecular line kinematics Kim, Trejo, Liu et al

14 Introduction Spiral-shell Summary Obs. Model AFGL 3068 Arm spacing Fine structures Kim, Trejo, Liu et al. 2017

15 Introduction Spiral-shell Summary Obs. Model AFGL 3068 Arm spacing Fine structures

16 Introduction Spiral-shell Summary Obs. Model AFGL 3068 Arm spacing Fine structures Arm spacing 1 dr r orb dφ = V wind V orb

17 Introduction Spiral-shell Summary Obs. Model AFGL 3068 Arm spacing Fine structures Arm spacing 1 dr r orb dφ = V wind V orb 1 r orb r 2π = V wind V orb r = 2πr orb V orb = p orb V wind V wind

18 Arm spacing Introduction Spiral-shell Summary Obs. Model AFGL 3068 Arm spacing Fine structures ( porb yr ) 2 = ( atot ) ( 3 Mtot AU M ) 1 ( ) ( ) ( ) ( ) r porb Vwind d 1 = arcsec 100 yr 15 km/s 300 pc

19 Arm spacing Introduction Spiral-shell Summary Obs. Model AFGL 3068 Arm spacing Fine structures ( porb yr ) 2 = ( atot ) ( 3 Mtot AU a = 60 AU, M = 2M p = 300 yr M ) 1 ( ) ( ) ( ) ( ) r porb Vwind d 1 = arcsec 100 yr 15 km/s 300 pc p = 300 yr, d = 300 pc r = 3

20 Arm spacing Introduction Spiral-shell Summary Obs. Model AFGL 3068 Arm spacing Fine structures ( porb yr ) 2 = ( atot ) ( 3 Mtot AU a = 10 AU, M = 2M p = 20 yr M ) 1 ( ) ( ) ( ) ( ) r porb Vwind d 1 = arcsec 100 yr 15 km/s 300 pc p = 20 yr, d = 1 kpc r = 60 mas

21 Arm spacing Introduction Spiral-shell Summary Obs. Model AFGL 3068 Arm spacing Fine structures ( porb yr ) 2 = ( atot ) ( 3 Mtot AU a = 10 AU, M = 2M p = 20 yr M ) 1 ( ) ( ) ( ) ( ) r porb Vwind d 1 = arcsec 100 yr 15 km/s 300 pc p = 20 yr, d = 1 kpc r = 60 mas

22 Introduction Spiral-shell Summary Obs. Model AFGL 3068 Arm spacing Fine structures Point 1 : a high angular resolution enables to study the spiralshell patterns induced by binaries with smaller separations and/or located far from us. Lee, Kim et al., in prep.

23 Introduction Spiral-shell Summary Obs. Model AFGL 3068 Arm spacing Fine structures Point 2 : the more details, the better constraints on the binary. Companion s gravitational wake (model) Kim & Taam 2012b

24 Introduction Spiral-shell Summary Summary A high angular resolution can - resolve the dynamic range of binary stars in different evolutionary stages but a bit better sensitivity is desired, - enable to study the spiral-shell patterns induced by close binaries and/or located far from us, - provide more details of circumstellar patterns to better constrain the binary characteristics (potentially also the imprints of giant planets for single star cases).