Morphological analysis of the cm-wave continuum in the dark cloud LDN1622
arXiv:astro-ph/0511283 · doi:10.1086/499517
Abstract
The spectral energy distribution of the dark cloud LDN1622, as measured by Finkbeiner using WMAP data, drops above 30GHz and is suggestive of a Boltzmann cutoff in grain rotation frequencies, characteristic of spinning dust emission. LDN1622 is conspicuous in the 31 GHz image we obtained with the Cosmic Background Imager, which is the first cm-wave resolved image of a dark cloud. The 31GHz emission follows the emission traced by the four IRAS bands. The normalised cross-correlation of the 31 GHz image with the IRAS images is higher by 6.6sigma for the 12um and 25um bands than for the 60um and 100um bands: C(12+25) = 0.76+/-0.02 and C(60+100) = 0.64+/-0.01. The mid-IR -- cm-wave correlation in LDN 1622 is evidence for very small grain (VSG) or continuum emission at 26-36GHz from a hot molecular phase. In dark clouds and their photon-dominated regions (PDRs) the 12um and 25um emission is attributed to stochastic heating of the VSGs. The mid-IR and cm-wave dust emissions arise in a limb-brightened shell coincident with the PDR of LDN1622, where the incident UV radiation from the Ori OB1b association heats and charges the grains, as required for spinning dust.
arXiv commentaccepted for publication in ApJ - the complete article with uncompressed figures may be downloaded from http://www.das.uchile.cl/~simon/ftp/l1622.pdf
References in corpus (27)
- The USNO-B Catalog
- Infrared Emission from Interstellar Dust. II. The Diffuse Interstellar Medium
- Infrared Emission from Interstellar Dust. I. Stochastic Heating of Small Grains
- Extrapolation of Galactic Dust Emission at 100 Microns to CMBR Frequencies Using FIRAS
- Electric Dipole Radiation from Spinning Dust Grains
- A Robotic Wide-Angle H-Alpha Survey of the Southern Sky
- Diffuse Galactic Emission from Spinning Dust Grains
- Microwave ISM Emission Observed by WMAP
- The Anisotropy of the Microwave Background to l = 3500: Mosaic Observations with the Cosmic Background Imager
- ISO spectroscopy of gas and dust: from molecular clouds to protoplanetary disks
- An Anomalous Component of Galactic Emission
- A Survey for Infall Motions toward Starless Cores. II. and Mapping Observations
- Magnetic Dipole Microwave Emission from Dust Grains
- A Uniform CO Survey of the Molecular Clouds in Orion and Monoceros
- First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Beam Profiles and Window Functions
- Detection of anomalous microwave emission in the Perseus molecular cloud with the COSMOSOMAS experiment
- Angular Power Spectra of the COBE DIRBE Maps
- A Fractal Origin for the Mass Spectrum of Interstellar Clouds: II. Cloud Models and Power Law Slopes
- The Cosmic Background Imager
- Cross-correlation of Tenerife data with Galactic templates - evidence for spinning dust?
- Tentative Detection of Electric Dipole Emission from Rapidly Rotating Dust Grains
- A New Spin on Galactic Dust
- The large-scale anomalous microwave emission revisited by WMAP
- Reappraising foreground contamination in the COBE-DMR data
- Anomalous radio emission from dust in the Helix
- Physical Conditions, Grain Temperatures, and Enhanced Very Small Grains in the Barnard Loop
- Deep Halpha imagery of the Eridanus shells
Cited by in corpus (77)
- Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Galactic Foreground Emission
- Planck early results. XX. New light on anomalous microwave emission from spinning dust grains
- A refined model for spinning dust radiation
- Exocometary gas in the HD 181327 debris ring
- Planck early results. XXI. Properties of the interstellar medium in the Galactic plane
- Submillimeter to centimeter excess emission from the Magellanic Clouds. II. On the nature of the excess
- The State-of-Play of Anomalous Microwave Emission (AME) Research
- Spinning dust emission: the effect of rotation around a non-principal axis
- A compact concentration of large grains in the HD142527 protoplanetary dust trap
- Planck 2015 results. XXV. Diffuse low-frequency Galactic foregrounds
- A cavity and further radial substructures in the disk around HD~97048
- An inner warp in the DoAr 44 T Tauri transition disk
- Centimeter-wave continuum radiation from the rho Ophiuchi molecular cloud
- Measurements of the Intensity and Polarization of the Anomalous Microwave Emission in the Perseus molecular complex with QUIJOTE
- A search for interstellar anthracene toward the Perseus anomalous microwave emission region
- A Case Against Spinning PAHs as the Source of the Anomalous Microwave Emission
- Anomalous Microwave Emission from the HII region RCW175
- AMI Galactic Plane Survey at 16 GHz: I -- Observing, mapping and source extraction
- A dusty filament and turbulent CO spirals in HD135344B-SAO206462
- Radio source calibration for the VSA and other CMB instruments at around 30 GHz
- Compact dust concentration in the MWC 758 protoplanetary disk
- Galactic foreground contributions to the WMAP5 maps
- VSA Observations of the Anomalous Microwave Emission in the Perseus Region
- New constraints on the Polarization of Anomalous Microwave Emission in nearby molecular clouds
- CBI limits on 31 GHz excess emission in southern HII regions
- Polarization Observations of the Anomalous Microwave Emission in the Perseus Molecular Complex with the Cosmosomas Experiment
- Constraints on the Polarization of the Anomalous Microwave Emission in the Perseus Molecular Complex from 7-year WMAP data
- Spitzer characterisation of dust in an anomalous emission region: the Perseus cloud
- Lynds 1622: a nearby star forming cloud projected on Orion B?
- ALMA observations of Elias 2-24: a protoplanetary disk with multiple gaps in the Ophiuchus Molecular Cloud
- AMI limits on 15 GHz excess emission in northern HII regions
- A super-resolution analysis of the DSHARP survey: Substructure is common in the inner 30 au
- COSMOSOMAS Observations of the CMB and Galactic Foregrounds at 11 GHz: Evidence for anomalous microwave emission at high Galactic Latitude
- AMI observations of Lynds Dark Nebulae: further evidence for anomalous cm-wave emission
- Constraints on spinning dust towards Galactic targets with the VSA: a tentative detection of excess microwave emission towards 3C396
- An upper limit on anomalous dust emission at 31 GHz in the diffuse cloud [LPH96]201.663+1.643
- Multi-GPU maximum entropy image synthesis for radio astronomy
- Dust-correlated cm-wavelength continuum emission on translucent clouds ζ Oph and LDN 1780
- 90GHz and 150GHz observations of the Orion M42 region. A sub-millimeter to radio analysis
- Characterizing Extragalactic Anomalous Microwave Emission in NGC 6946 with CARMA
- A centimetre-wave excess over free-free emission in planetary nebulae
- Modelling the spinning dust emission from dense interstellar clouds
- A Limit on the Polarized Anomalous Microwave Emission of Lynds 1622
- Dust-correlated centimetre-wave radiation from the M 78 reflection nebula
- IR-correlated 31 GHz radio emission from Orion East
- Planck intermediate results. XII: Diffuse Galactic components in the Gould Belt System
- Detection of Spectral Variations of Anomalous Microwave Emission with QUIJOTE and C-BASS
- An excess of emission in the dark cloud LDN 1111 with the Arcminute Microkelvin Imager
- Detection of Anomalous Microwave Emission in the Pleiades Reflection Nebula with WMAP and the COSMOSOMAS Experiment
- Using cm Observations to Constrain the Abundance of Very Small Dust Grains in Galactic Cold Cores
- On the Limitations of the Anomalous Microwave Emission Emissivity
- AMI Observations of the Anomalous Microwave Emission in the Perseus Molecular Cloud
- The C-Band All-Sky Survey (C-BASS): Constraining diffuse Galactic radio emission in the North Celestial Pole region
- A 33 GHz VSA survey of the Galactic plane from 27 to 46 degrees
- Resolved spectral variations of the centimetre-wavelength continuum from the rho Oph W photo-dissociation-region
- High-resolution ALMA observations of V4046Sgr: a circumbinary disc with a thin ring
- Planck Observations of M33
- AMI Large Array radio continuum observations of Spitzer c2d small clouds and cores
- Resolved observations at 31 GHz of spinning dust emissivity variations in Oph
- Regularized Maximum Likelihood Image Synthesis and Validation for ALMA Continuum Observations of Protoplanetary Disks
- Observations of Free-Free and Anomalous Microwave Emission from LDN 1622 with the 100 m Green Bank Telescope
- Bayesian Image Reconstruction Based on Voronoi Diagrams
- QUIJOTE Scientific Results -- VII. Galactic AME sources in the QUIJOTE-MFI Northern Hemisphere Wide-Survey
- Nanodust in the Interstellar Medium in Comparison to the Solar System
- Modelling the spinning dust emission from LDN 1780
- QUIJOTE scientific results -- V. The microwave intensity and polarisation spectra of the Galactic regions W49, W51 and IC443
- Microwave and radio emission of dusty star-forming galaxies: Implication for the cosmic radio background
- The Cosmic Background Imager 2
- Evidence for anomalous dust-correlated emission at 8 GHz
- CARMA Observations of Galactic Cold Cores: Searching for Spinning Dust Emission
- Observations of Galactic star-forming regions with the Cosmic Background Imager at 31 GHz
- QUIJOTE scientific results -- XVIII. New constraints on the polarization of the Anomalous Microwave Emission in bright Galactic regions: \,Ophiuchi, Perseus and W43
- AMI-CL J0300+2613: a Galactic anomalous-microwave-emission ring masquerading as a galaxy cluster
- A characterization of the diffuse Galactic emissions in the anti-center of the Galaxy
- The Doppler-flip in HD100546 as a disk eruption: the elephant in the room of kinematic protoplanet searches
- Variable structure in the PDS70 disc and uncertainties in radio-interferometric image restoration
- A characterization of the diffuse Galactic emissions at large angular scales using the Tenerife data