First Millimeter Detection of the Disk around a Young, Isolated, Planetary-mass Object

Bayo, A.; Joergens, V.; Liu, Yao; Brauer, Robert; Olofsson, J.; Arancibia, Javier; Pinilla, P.; Wolf, S.; Ruge, Jan Philipp; Henning, Thomas; Natta, A.; Johnston, K. G.; Bonnefoy, M.; Beuther, H.; Chauvin, G.

doi:10.3847/2041-8213/aa7046

Cited by 46 publications

(33 citation statements)

References 48 publications

(68 reference statements)

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“…Silk 1977;Bowler et al 2011). In fact, Fang et al (2016); Luhman et al (2005); Boucher et al (2016);Joergens et al (2015); Bayo et al (2017) have found four FFPs with accretion disk. Furthermore, planetary-mass binaries, which would be almost impossible to from through planetary formation mechanisms, have also be found by e.g.…”

Section: Erik Elfgrenmentioning

confidence: 99%

History of globulettes in the Milky Way

Grenman

Elfgren

Weber

2018

Astrophys Space Sci

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Globulettes are small (radii < 10 kAU) dark dust clouds, seen against the background of bright nebulae. A majority of the objects have planetary mass. These objects may be a source of brown dwarfs and free floating planetary mass objects in the galaxy. In this paper we investigate how many globulettes could have formed in the Milky Way and how they could contribute to the total population of free floating planets. In order to do that we examine H-alpha images of 27 H II regions. In these images, we find 778 globulettes.We find that a conservative value of the number of globulettes formed is 5.7 × 10 10 . If 10 % of the globulettes form free floating planets then they have contributed with 5.7×10 9 free floating planets in the Milky Way. A less conservative number of globulettes would mean that the globulettes could contribute 2.0 × 10 10 free floating planets. Thus the globulettes could represent a non-negligible source of free floating planets in the Milky Way.

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Section: Erik Elfgrenmentioning

confidence: 99%

History of globulettes in the Milky Way

Grenman

Elfgren

Weber

2018

Astrophys Space Sci

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“…If there is ALMA detection of discs around planetary mass objects, we can use our disc models to constrain CPD properties. We take the recent ALMA detection of the disc around OTS44 (a 12MJ object) as an example (Bayo et al 2017). OTS44 accretes at 8×10 −12 M⊙/yr.…”

Section: Constraining Cpd Propertiesmentioning

confidence: 99%

On the radio detectability of circumplanetary discs

Zhu

Andrews

Isella

2018

Monthly Notices of the Royal Astronomical Society

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Discs around young planets, so-called circumplanetary discs (CPDs), are essential for planet growth, satellite formation, and planet detection. We study the millimetre and centimetre emission from accreting CPDs by using the simple α disc model. We find that it is easier to detect CPDs at shorter radio wavelengths (e.g. λ 1 mm). For example, if the system is 140 pc away from us, deep observations (e.g. 5 hours) at ALMA Band 7 (0.87 mm) are sensitive to as small as 0.03 lunar mass of dust in CPDs. If the CPD is around a Jupiter mass planet 20 AU away from the host star and has α 0.001, ALMA can detect this disc when it accretes faster than 10 −10 M ⊙ /yr. ALMA can also detect the "minimum mass sub-nebulae" disc if such a disc exists around a young planet in YSOs. However, to distinguish the embedded compact CPD from the circumstellar disc material, we should observe circumstellar discs with large gaps/cavities using the highest resolution possible. We also calculate the CPD fluxes at VLA bands, and discuss the possibility of detecting radio emission from jets/winds launched in CPDs. Finally we argue that, if the radial drift of dust particles is considered, the drifting timescale for millimetre dust in CPDs can be extremely short. It only takes 10 2 -10 3 years for CPDs to lose millimetre dust. Thus, for CPDs to be detectable at radio wavelengths, mm-sized dust in CPDs needs to be replenished continuously, or the disc has a significant fraction of micron-sized dust or a high gas surface density so that the particle drifting timescale is long, or the radial drift is prevented by other means (e.g. pressure traps).

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“…2.2 in Pinilla et al 2013). It is, however, evident that disks around VLM stars and BDs host millimeter sizedparticles (Ricci et al 2014;Bayo et al 2017;Pinilla et al 2017b) and that somehow the radial drift of the particles is reduced or completely suppressed in these disks.…”

Section: Introductionmentioning

confidence: 99%

Resolved millimeter-dust continuum cavity around the very low mass young star CIDA 1

Pinilla

Natta

Manara

et al. 2018

A&A

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Context. Transition disks (TDs) are circumstellar disks with inner regions highly depleted in dust. TDs are observed in a small fraction of disk-bearing objects at ages of 1-10 Myr. They are important laboratories to study evolutionary effects in disks, from photoevaporation to planet-disk interactions. Aims. We report the discovery of a large inner dust-empty region in the disk around the very low mass star CIDA 1Methods. We used ALMA continuum observations at 887 µm, which provide a spatial resolution of 0. 21 × 0. 12 (∼15×8 au in radius at 140 pc). Results. The data show a dusty ring with a clear cavity of radius ∼20 au, the typical characteristic of a TD. The emission in the ring is well described by a narrow Gaussian profile. The dust mass in the disk is ∼17 M⊕. CIDA 1 is one of the lowest mass stars with a clearly detected millimeter cavity. When compared to objects of similar stellar mass, it has a relatively massive dusty disk (less than ∼ 5% of Taurus Class II disks in Taurus have a ratio of M disk /M larger than CIDA 1) and a very high mass accretion rate (CIDA 1 is a disk with one of the lowest values of M disk /Ṁ ever observed). In light of these unusual parameters, we discuss a number of possible mechanisms that can be responsible for the formation of the dust cavity (e.g., photoevaporation, dead zones, embedded planets, close binary). We find that an embedded planet of a Saturn mass or a close binary are the most likely possibilities.

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First Millimeter Detection of the Disk around a Young, Isolated, Planetary-mass Object

Cited by 46 publications

References 48 publications

History of globulettes in the Milky Way

History of globulettes in the Milky Way

On the radio detectability of circumplanetary discs

Resolved millimeter-dust continuum cavity around the very low mass young star CIDA 1

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