3.3 cm JVLA observations of transitional disks: searching for centimeter pebbles

Abstract

We present sensitive (rms-noises $\sim$ 4 -- 25 $\mu$Jy) and high angular resolution ($\sim$1--2$"$) 8.9 GHz (3.3 cm) Karl G. Jansky Very Large Array (JVLA) radio continuum observations of 10 presumed transitional disks associated with young low-mass stars. We report the detection of radio continuum emission in 5 out of the 10 objects (RXJ1615, UX Tau A, LkCa15, RXJ1633, and SR24s). In the case of LkCa15, the centimeter emission is extended, and has a similar morphology to that of the transitional disk observed at mm wavelengths with an inner depression. For these five detections, we construct the Spectral Energy Distributions (SEDs) from the centimeter to submillimeter wavelengths, and find that they can be well fitted with a single (RXJ 1633 and UX Tau A) or a two component power-law (LkCa 15, RXJ 1615, and SR24s). For the cases where a single power-law fits well the data, the centimeter emission is likely produced by optically thin dust with large grains i.e. centimeter-size pebbles) present in the transitional disks. For the cases where a double power-law fits the data, the centimeter emission might be produced by the combination of photoevaporation and/or a free-free jet. We conclude that RXJ1633 and UX Tau A are excellent examples of transitional disks where the structure of the emission from centimeter/millimeter pebbles can be studied. In the other cases, some other physical emitting mechanisms are also important in the centimeter regime.

arXiv commentAccepted to Astrophysical Journal

References in corpus (38)

• Protoplanetary Disks and Their Evolution
• Circumstellar Dust Disks in Taurus-Auriga: The Submillimeter Perspective
• Resolved Images of Large Cavities in Protoplanetary Transition Disks
• A Major Asymmetric Dust Trap in a Transition Disk
• Evidence for a developing gap in a 10 Myr old protoplanetary disk
• On the Submillimeter Opacity of Protoplanetary Disks
• High Resolution Submillimeter Constraints on Circumstellar Disk Structure
• Photoevaporation of Circumstellar Disks by FUV, EUV and X-ray Radiation from the Central Star
• Structure and evolution of pre-main sequence circumstellar disks
• The Truncated Disk of CoKu Tau/4
• Dust grain growth in rho-Ophiuchi protoplanetary disks
• Resolved gas cavities in transitional disks inferred from CO isotopologues with ALMA
• Large grains in the disk of CQ Tau
• A Spatially Resolved Inner Hole in the Disk around GM Aurigae
• Resolving the inner dust disks surrounding LkCa 15 and MWC 480 at mm wavelengths
• Towards Planetesimals in the Disk around TW Hya: 3.5 centimeter Dust Emission
• Imaging of a Transitional Disk Gap in Reflected Light: Indications of Planet Formation Around the Young Solar Analog LkCa 15
• The circumstellar disk of AB Aurigae: evidence for envelope accretion at late stages of star formation?
• Grain Growth in the Circumstellar Disks of the Young Stars CY Tau and DoAr 25
• Subaru Imaging of Asymmetric Features in a Transitional Disk in Upper Scorpius
• Correlation between grain growth and disk geometry in Herbig Ae/Be systems
• Searching for circumplanetary disks around LkCa 15
• Imaging the Inner and Outer Gaps of the Pre-Transitional Disk of HD 169142 at 7 mm
• Near-Infrared Imaging Polarimetry of HD142527
• HD100546 Multi-Epoch Scattered-Light Observations
• The (w)hole survey: an unbiased sample study of transition disk candidates based on Spitzer catalogs
• Testing particle trapping in transition disks with ALMA
• Grain growth signatures in the protoplanetary discs of Chamaeleon and Lupus
• Millimetre spectral indices of transition disks and their relation to the cavity radius
• ALMA 690 GHz observations of IRAS 16293-2422B: Infall in a highly optically-thick disk
• Transitional disks and their origins: an infrared spectroscopic survey of Orion A
• Protoplanetary Disk Mass Distribution in Young Binaries
• Imaging the photoevaporating disk and radio jet of GM Aur
• An Ionized Outflow from AB Aur, a Herbig Ae Star with a Transitional Disk
• Three intermediate-mass YSOs with different properties emerging from the same natal cloud in IRAS 00117+6412
• Gas inside the 97 au cavity around the transition disk Sz\,91
• Submillimeter Array Observations of the RX J1633.9-2442 Transition Disk: Evidence for Multiple Planets in the Making
• A Dwarf Protoplanetary Disk around XZ Tau B

Cited by in corpus (6)

• Dust depleted inner disks in a large sample of transition disks through long-baseline ALMA observations
• A Spatially Resolved AU-scale Inner Disk around DM Tau
• Transition disks: the observational revolution from SEDs to imaging
• An Inner Disk in the Large Gap of the Transition Disk SR 24S
• Grain Growth in the Dust Ring with Crescent around Very Low Mass Star ZZ Tau IRS with JVLA
• Time-dependent long-term hydrodynamic simulations of the inner protoplanetary disk III: The influence of photoevaporation