Electric Dipole Radiation from Spinning Dust Grains

Details Electric Dipole Radiation from Spinning Dust Grains Electric Dipole Radiation from Spinning Dust Grains

1998-02-18

arxiv.org/abs/astro-ph/9802239v1

Astrophys.J.508:157-179,1998

Astronomy and Astrophysics

Astrophysics

59 pages, 19 eps figures, uses aaspp4.sty . Submitted to Ap.J

Scientific paper

10.1086/306387

We discuss the rotational excitation of small interstellar grains and the resulting electric dipole radiation from spinning dust. Attention is given to excitation and damping of rotation by: collisions with neutrals; collisions with ions; plasma drag; emission of infrared radiation; emission of microwave radiation; photoelectric emission; and formation of H_2 on the grain surface. We introduce dimensionless functions F and G which allow direct comparison of the contributions of different mechanisms to rotational drag and excitation. Emissivities are estimated for dust in different phases of the interstellar medium, including diffuse HI, warm HI, low-density photoionized gas, and cold molecular gas. Spinning dust grains can explain much, and perhaps all, of the 14-50 GHz background component recently observed in CBR studies. It should be possible to detect rotational emission from small grains by ground-based observations of molecular clouds.

Affiliated with

Also associated with

No associations

Rating

Electric Dipole Radiation from Spinning Dust Grains does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Electric Dipole Radiation from Spinning Dust Grains, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electric Dipole Radiation from Spinning Dust Grains will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-386095