5-6 October 2017
Würzburg, Festung Marienberg
Europe/Berlin timezone
GLOW Annual Assembly and GLOW-SKA Meeting

Deep L-band VLA observations of the Toothbrush cluster

5 Oct 2017, 12:45
Room Egloffstein (Würzburg, Festung Marienberg)

Room Egloffstein

Würzburg, Festung Marienberg

The meeting takes place in the historic building of Fortress Marienberg. You can easily get their by bus (#9), car (chargeable parking lot), or by foot from "Alte Mainbrücke" (via "Tellsteige").


Ms. Kamlesh Rajpurohit (Thüringer Landessternwarte Tautenburg)


We present the results of deep L-band VLA observations of the merging galaxy cluster 1RXS J0603.3+4214, which host one of the brightest relics, known as Toothbrush, and an elongated giant radio halo. Our new VLA images provide an unprecedented detailed view of the Toothbrush, revealing enigmatic filamentary structures. These VLA observations in combination with GMRT and LOFAR data, allowed us to study the spectral index distribution at very high resolution. A simple toy model suggest that there are significant variations of the magnetic field strength along the line of sight. The downstream spectral profile, between 150 MHz to 1.5 GHz, can be explained by an inhomogeneous magnetic field and high Mach number shock. The radio halo shows an average spectral index of about $\alpha=-1.16\pm0.05$ and a slight gradient from north to south. Excluding the southernmost part, the halo morphology agrees very well with the X-ray morphology. A power-law correlation is found between the radio and X-ray surface brightness. We will also present our preliminary polarization results.

Primary author

Ms. Kamlesh Rajpurohit (Thüringer Landessternwarte Tautenburg)

Presentation Materials

Your browser is out of date!

Update your browser to view this website correctly. Update my browser now