TY - JOUR
T1 - Misaligned disks in the binary protostar IRS 43
AU - Brinch, Christian
AU - Jørgensen, Jes Kristian
AU - Hogerheijde, Michiel R.
AU - Nelson, Richard P.
AU - Gressel, Oliver
PY - 2016
Y1 - 2016
N2 - Recent high angular resolution (∼ 0\buildrel{\prime\prime}\over{.}
2) ALMA observations of the 1.1 mm continuum and of HCO+ J =
3–2 and HCN J = 3–2 gas toward the binary protostar IRS 43
reveal multiple Keplerian disks that are significantly misaligned (\gt
60^\circ ), both in inclination and position angle and also with respect
to the binary orbital plane. Each stellar component has an associated
circumstellar disk while the binary is surrounded by a circumbinary
disk. Together with archival VLA measurements of the stellar positions
over 25 years, and assuming a circular orbit, we use our continuum
measurements to determine the binary separation, a=74+/- 4 {au}, and its
inclination, i\lt 30^\circ . The misalignment in this system suggests
that turbulence has likely played a major role in the formation of IRS
43.
AB - Recent high angular resolution (∼ 0\buildrel{\prime\prime}\over{.}
2) ALMA observations of the 1.1 mm continuum and of HCO+ J =
3–2 and HCN J = 3–2 gas toward the binary protostar IRS 43
reveal multiple Keplerian disks that are significantly misaligned (\gt
60^\circ ), both in inclination and position angle and also with respect
to the binary orbital plane. Each stellar component has an associated
circumstellar disk while the binary is surrounded by a circumbinary
disk. Together with archival VLA measurements of the stellar positions
over 25 years, and assuming a circular orbit, we use our continuum
measurements to determine the binary separation, a=74+/- 4 {au}, and its
inclination, i\lt 30^\circ . The misalignment in this system suggests
that turbulence has likely played a major role in the formation of IRS
43.
KW - astrometry
KW - protoplanetary disks
KW - stars: formation
U2 - 10.3847/2041-8205/830/1/L16
DO - 10.3847/2041-8205/830/1/L16
M3 - Journal article
SN - 2041-8205
VL - 830
JO - The Astrophysical Journal. Letters
JF - The Astrophysical Journal. Letters
IS - 1
M1 - L16
ER -