Large grains in discs around young stars: ATCA observations of WW Chamaeleontis, RU Lupi, and CS Chamaeleontis

Home

All issues

Volume 495 / No 3 (March I 2009)

A&A, 495 3 (2009) 869-879

Full HTML

Free Access

Table 7:

Resolving WW Cha. Point-source versus Gaussian fluxes and resulting Gaussian source size for WW Cha at 7 and 16 mm.
Obs. date	Wavelength	Flux (p)^a	Flux (G)^a	rms^b	Gaussian size	Beam size^c	Dust opacity^d	Disc mass^e
	(mm)	(mJy)	(mJy)	(mJy/beam)	(arcsec)	(arcsec)	(cm² g^-1)	( $M_\odot$ )
24-28 August 2005^f	3.3	$25.9\pm 1.0$	$33.1\pm 2.1$	1.2	1.32	$2.5\times2.2$	2.86	0.024
31 March 2008	7.0	$5.1\pm0.19$	$5.79\pm0.38$	0.231	2.0	$5.8 \times 5.3$	1.94	0.027
31 March 2008	7.3	$5.2\pm0.17$	$6.46\pm0.38$	0.194	3.4	$6.1 \times 5.6$	1.90	0.033
2 November 2007	15.4	$0.55\pm0.20$	$1.65\pm0.55$	0.125	2.1	$1.9 \times 1.3$	1.29	0.055
2 November 2007	16.2	$0.48\pm0.12$	$1.20\pm0.26$	0.089	1.2	$2.0 \times 1.4$	1.26	0.045

^a Continuum fluxes are from point-source (p) and circular Gaussian (G) fits in the (u, v) plane; ^b rms calculated from the cleaned image; ^c restored beam, using natural weighting; ^d using the opacity law of Beckwith et al. (1990) $\kappa_\nu = 10$ ( $\nu/10^{12}$ Hz) $^\beta$ , with $\beta = 0.52$ ; ^e assuming a gas-to-dust ratio of 100; ^f from Lommen et al. (2007).

Source LaTeX | All tables | In the text

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.