Experimental Phase Functions of Millimeter-sized Cosmic Dust Grains

DOI: 
10.3847/1538-4357/aa7ff2
Publication date: 
01/09/2017
Main author: 
Muñoz, O.
IAA authors: 
Muñoz, O.;Moreno, F.;Guirado, D.;Escobar-Cerezo, J.
Authors: 
Muñoz, O.;Moreno, F.;Vargas-Martín, F.;Guirado, D.;Escobar-Cerezo, J.;Min, M.;Hovenier, J. W.
Journal: 
The Astrophysical Journal
Refereed: 
Yes
Publication type: 
Article
Volume: 
846
Pages: 
85
Abstract: 

We present the experimental phase functions of three types of millimeter-sized dust grains consisting of enstatite, quartz, and volcanic material from Mount Etna, respectively. The three grains present similar sizes but different absorbing properties. The measurements are performed at 527 nm covering the scattering angle range from 3° to 170°. The measured phase functions show two well-defined regions: (i) soft forward peaks and (ii) a continuous increase with the scattering angle at side- and back-scattering regions. This behavior at side- and back-scattering regions is in agreement with the observed phase functions of the Fomalhaut and HR 4796A dust rings. Further computations and measurements (including polarization) for millimeter-sized grains are needed to draw some conclusions about the fluffy or compact structure of the dust grains.

Database: 
ADS
SCOPUS
URL: 
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85029120217&doi=10.3847%2f1538-4357%2faa7ff2&partnerID=40&md5=c1b4cd4e680180e2b9be6687dfac99fa
ADS Bibcode: 
2017ApJ...846...85M
Keywords: 
comets: general;dust;extinction;protoplanetary disks;scattering;Astrophysics - Astrophysics of Galaxies;Astrophysics - Earth and Planetary Astrophysics