BEAST Do big make big ?

Rubén Asensio-Torres and the BEAST team

Subaru 20th Anniversary Hawaii Nov 2019 Some directly imaged planets

Chauvin et al. (2017)

HR 8799 HIP 65426 Marois et al. (2010)

Macintosh et al. (2015) 51 Eri

beta Pic Lagrange et al. (2010)

Rubén Asensio-Torres (MPIA) Subaru 20th Anniversary - Hawaii Super-jovian companions to massive stars

600 HIP 88048 kap And 400

200

0 RV [m/s]

200

400 40 20 0 c [m/s] 20

o 40 2000 3200 4400 5600 6800 Currie+2018 2450000 + JD [days] Quirrenbach+2019

• 15—25 Mjup companions to 2.5—3 Msun stars

• above the deuterium burning limit

• ratios below 1%

Rubén Asensio-Torres (MPIA) Subaru 20th Anniversary - Hawaii An upper limit of formation

35

planets 30 candidate planets Eq. 3, bin mean Eq. 3, [Fe/H] = 0 25

20

15 planet occurrence rate [%] 10

5

0 12345

stellar mass [MSun]

Reffert+2015

Rubén Asensio-Torres (MPIA) Subaru 20th Anniversary - Hawaii BEAST: The B- Abundance STudy

• Direct imaging survey with SPHERE in IRDIFS-EXT mode Previous • 83 B-type stars in Sco-Cen surveys

• 10—20 Myr, 120—150 pc

• Homegenous sample in age, Age (Myr)

• Complementary to previous surveys BEAST

Rubén Asensio-Torres (MPIA) Subaru 20th Anniversary - Hawaii BEAST: Current operational status

• Originally scheduled for P101-P104, now extended to P105 due to P101 carry- overs into P103

• 66 targets observed in 1st , 17 still to be done

• 4 targets observed in 2nd epoch, about 80% of all targets are expected to require follow-up

• ~40 people in BEAST (PI: M.Janson, Stockholm University), ~15 people in the DRT cycle

• Monthly cycles with data reduction: CC identification & characterization, CC classification, and validation

Rubén Asensio-Torres (MPIA) Subaru 20th Anniversary - Hawaii BEAST prelude discovery

• The HIP 79098 (AB)b companion as seen by SPHERE

Janson, Asensio-Torres+2019 Asensio-Torres, Janson+ in prep.

Rubén Asensio-Torres (MPIA) Subaru 20th Anniversary - Hawaii HIP 79098 (AB)b

• Circumbinary substellar companion around a B-type stellar pair (triple?)

Janson, Asensio-Torres+2019 Asensio-Torres, Janson+ in prep.

Rubén Asensio-Torres (MPIA ) Subaru 20th Anniversary - Hawaii HIP 79098 (AB)b

M0-M5 young/dusty dwarfs M0-M5 young/dusty dwarfs 8 M6-M9 M6-M9 L0-L5 8 L0-L5 HIP 78530B L6-L9 HIP 64892B L6-L9 HIP 64892B T0-T5 T0-T5 HIP 79098(AB)b HIP 79098(AB)b HIP 79098(AB)b 10 T6-T9.5 GSC0621-0021B T6-T9.5 >T8 UScoCTIO 108B 10 Y0-Y2 UScoCTIO 108B

1RXS1609b HD 106906 b 12 1RXS1609b 12 ζ Del B HIP 65426b J ζ Del B H HN Peg B M

M HN Peg B GU Psc B HIP 65426b 14 2M1324+63 HD 206893B 14

WISE0754+79 16 16 WISE1647+56 VHS 1256ABb (12.7/17.1pc) 2M1207b

VHS 1256ABb (12.7/17.1pc) 18 18

HR8799d HR8799d HR8799e HR8799e 20 20 -1 0 1 2 3 0.0 0.5 1.0 1.5 2.0 J-Ks H-K1

• Very red color, characteristic of young low-gravity objects

• Mass between 16—23 Mjup

Janson, Asensio-Torres+2019 Asensio-Torres, Janson+ in prep.

Rubén Asensio-Torres (MPIA ) Subaru 20th Anniversary - Hawaii BEAST prelude discovery

• The HIP 79098 (AB)b companion as seen by SPHERE: ongoing work

Karl+2018

Asensio-Torres+ in prep.

Janson, Asensio-Torres+2019 Asensio-Torres, Janson+ in prep.

Rubén Asensio-Torres (MPIA) Subaru 20th Anniversary - Hawaii BEAST: Preliminary results

• A candidate extending out to 400—500 AU around a triple stellar system

Rubén Asensio-Torres (MPIA ) Subaru 20th Anniversary - Hawaii BEAST: Preliminary results

• New

• ~60 Mjup object at 48 AU: proximity, brightness and spectrum all imply a physical

companion Contrast

Wavelength (microns)

Rubén Asensio-Torres (MPIA ) Subaru 20th Anniversary - Hawaii BEAST: Planetary-mass candidates

Several CCs (also in the IFS FOV), some of which show signs of molecular absorption / interesting colors

Rubén Asensio-Torres (MPIA ) Subaru 20th Anniversary - Hawaii Background motion vs CPM in Sco-Cen

BG?

CPM?

Nielsen+ 2017

Rubén Asensio-Torres (MPIA ) Subaru 20th Anniversary - Hawaii Conclusions

The B-star Exoplanet Abundance Study (BEAST) is evaluating planet formation on wide orbits around massive stars with SPHERE

• 83 B-type stars in Sco-Cen

• First result: a ~20 Mjup companion with mass ratio <1% (Janson+2019, Asensio-Torres+in prep.)

• A debris disk extending out to 400 AU

• Several interesting candidates in the IFS FoV

• Second epochs and a statistical analysis will complete the survey