Searching for Spectroscopic Binaries Within Transition Disk Objects*

Kohn, Saul A.; Shkolnik, Evgenya L.; Weinberger, Alycia J.; Carlberg, Joleen K.; Llama, Joe

doi:10.3847/0004-637x/820/1/2

Cited by 20 publications

(19 citation statements)

References 123 publications

(183 reference statements)

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“…Certainly stellar mass companions are ruled out in many cases (Pott et al 2010;Kohn et al 2016;Ruíz-Rodríguez et al 2016), nor would they be expected from the known statistics of the field binary population (e.g. Raghavan et al 2010).…”

Section: Discussionmentioning

confidence: 99%

Circumbinary, not transitional: on the spiral arms, cavity, shadows, fast radial flows, streamers, and horseshoe in the HD 142527 disc

Price

Cuello

Pinte

et al. 2018

Monthly Notices of the Royal Astronomical Society

186

199

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We present 3D hydrodynamical models of the HD142527 protoplanetary disc, a bright and well studied disc that shows spirals and shadows in scattered light around a 100 au gas cavity, a large horseshoe dust structure in mm continuum emission, together with mysterious fast radial flows and streamers seen in gas kinematics. By considering several possible orbits consistent with the observed arc, we show that all of the main observational features can be explained by one mechanism -the interaction between the disc and the observed binary companion. We find that the spirals, shadows and horseshoe are only produced in the correct position angles by a companion on an inclined and eccentric orbit approaching periastron -the 'red' family from Lacour et al. (2016). Dust-gas simulations show radial and azimuthal concentration of dust around the cavity, consistent with the observed horseshoe. The success of this model in the HD142527 disc suggests other mm-bright transition discs showing cavities, spirals and dust asymmetries may also be explained by the interaction with central companions.

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Section: Discussionmentioning

confidence: 99%

Circumbinary, not transitional: on the spiral arms, cavity, shadows, fast radial flows, streamers, and horseshoe in the HD 142527 disc

Price

Cuello

Pinte

et al. 2018

Monthly Notices of the Royal Astronomical Society

186

199

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“…Three of these-ROph 6, 8, and 21-were identified on the basis of both, yielding 20 total infrared-identified transition disks in our sample. Of these 20 total transitional disk candidates three, ROph 2, 12, and 36, were discovered by Ruíz-Rodríguez et al (2016) to harbor tight stellar binaries (a 3  au), whose infrared signature mimicked that of transitional disks, and one, ROph 32, was discovered by Kohn et al (2016) to be a spectroscopic binary with a 0.6 aũ . ROph 6 was found to be a very tight (∼5 mas) binary by Loinard et al (2008); its mid-infrared color is due to the presence of a hot ring of material at a large distance from the star, and is most likely not indicative of a true transitional disk.…”

Section: Sample Selectionmentioning

confidence: 99%

Protoplanetary Disks in ρ Ophiuchus as Seen from ALMA

Cox

Harris

Looney

et al. 2017

ApJ

109

144

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We present a high angular resolution ( 0. 2  ), high-sensitivity ( 0.2 s~mJy) survey of the 870 μm continuum emission from the circumstellar material around 49 pre-main-sequence stars in the ρ Ophiuchus molecular cloud. Because most millimeter instruments have resided in the northern hemisphere, this represents the largest highresolution, millimeter-wave survey of the circumstellar disk content of this cloud. Our survey of 49 systems comprises 63 stars; we detect disks associated with 29 single sources, 11 binaries, 3 triple systems, and 4 transition disks. We present flux and radius distributions for these systems; in particular, this is the first presentation of a reasonably complete probability distribution of disk radii at millimeter wavelengths. We also compare the flux distribution of these protoplanetary disks with that of the disk population of the Taurus-Auriga molecular cloud. We find that disks in binaries are both significantly smaller and have much less flux than their counterparts around isolated stars. We compute truncation calculations on our binary sources and find that these disks are too small to have been affected by tidal truncation and posit some explanations for this. Lastly, our survey found three candidate gapped disks, one of which is a newly identified transition disk with no signature of a dip in infrared excess in extant observations.

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“…To assess the detectability of RV companions, we followed the procedure described in Kohn et al (2016). We calculated orbits for 482 million putative binary systems for masses of the secondary of 0.6 to 12.6 M Jup and periods up to 1550 days.…”

Section: Doppler Constraintsmentioning

confidence: 99%

Astrometric Constraints on the Masses of Long-period Gas Giant Planets in the TRAPPIST-1 Planetary System

Boss

Weinberger

Keiser

et al. 2017

Self Cite

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Transit photometry of the M8V dwarf star TRAPPIST-1 (2MASS J23062928-0502285) has revealed the presence of at least seven planets with masses and radii similar to that of Earth orbiting at distances that might allow liquid water to be present on their surfaces. We have been following TRAPPIST-1 since 2011 with the CAPSCam astrometric camera on the 2.5-m du Pont telescope at the Las Campanas Observatory in Chile. In 2016 we noted that TRAPPIST-1 lies slightly farther away than previously thought, at 12.49 pc, rather than 12.1 pc. Here we examine fifteen epochs of CAPSCam observations of TRAPPIST-1, spanning the five years from 2011 to 2016, and obtain a revised trigonometric distance of 12.56 ± 0.12 pc. The astrometric data analysis pipeline shows no evidence for a long-period astrometric wobble of TRAPPIST-1. After proper motion and parallax are removed, residuals at the level of ±1.3 millarcsec (mas) remain. The amplitude of these residuals constrains the masses of any long-period gas giant planets in the TRAPPIST-1 system: no planet more massive than ∼ 4.6M Jup orbits with a 1 yr period, and no planet more massive than ∼ 1.6M Jup orbits with a 5 yr period. Further refinement of the CAPSCam data analysis pipeline, combined with continued CAPSCam observations, should either detect any longperiod planets, or put an even tighter constraint on these mass upper limits.

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Searching for Spectroscopic Binaries Within Transition Disk Objects*

Cited by 20 publications

References 123 publications

Circumbinary, not transitional: on the spiral arms, cavity, shadows, fast radial flows, streamers, and horseshoe in the HD 142527 disc

Circumbinary, not transitional: on the spiral arms, cavity, shadows, fast radial flows, streamers, and horseshoe in the HD 142527 disc

Protoplanetary Disks in ρ Ophiuchus as Seen from ALMA

Astrometric Constraints on the Masses of Long-period Gas Giant Planets in the TRAPPIST-1 Planetary System

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