SIMBAD references

2005ApJ...624L..89W - Astrophys. J., 624, L89-L92 (2005/May-2)

Detection of anomalous microwave emission in the Perseus molecular cloud with the COSMOSOMAS experiment.

WATSON R.A., REBOLO R., RUBINO-MARTIN J.A., HILDEBRANDT S., GUTIERREZ C.M., FERNANDEZ-CEREZO S., HOYLAND R.J. and BATTISTELLI E.S.

Abstract (from CDS):

We present direct evidence for anomalous microwave emission in the Perseus molecular cloud, which shows a clear rising spectrum from 11 to 17 GHz in the data from the COSMOSOMAS experiment. By extending the frequency coverage using W ilkinson Microwave Anisotropy Probe maps convolved with the COSMOSOMAS scanning pattern, we reveal a peak flux density of 42±4 Jy at 22 GHz integrated over an extended area of 1°.65 x1°.0 centered on R.A.=55°.4±0°.1 and decl.=+31°.8±0°.1 (J2000). The flux density that we measure at this frequency is nearly an order of magnitude higher than can be explained in terms of normal Galactic emission processes (synchrotron, free-free, and thermal dust). An extended IRAS dust feature, G159.6-18.5, is found near this position, and no bright unresolved source that could be an ultracompact H II region or gigahertz-peaked source could be found. An adequate fit for the spectral density distribution can be achieved from 10 to 50 GHz by including a very significant contribution from electric dipole emission from small spinning dust grains.

Abstract Copyright:

Journal keyword(s): Cosmology: Diffuse Radiation - ISM: Dust, Extinction - ISM: Individual: Alphanumeric: G159.6-18.5 - Radiation Mechanisms: General - Radio Continuum: ISM

Simbad objects: 11

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