Detection of the H92α recombination line from NGC 4945

Free Access

Table 1:

ATCA Observational Parameters and Results for NGC 4945.
	NGC 4945
Array configuration	750D (1993 Jul. 25), 1.5D (1994 Sep. 21), 6C (94 Oct. 03)
Date of observation	1993 Jul. 25, 1994 Sep. 21, 94 Oct. 03
Integration time	22.7 h
Transitions	H92 $\alpha$ & H91 $\alpha$
$\nu_{\rm rest}$ of RRL	8309.38 MHz & 8584.82 MHz
$\nu_{\rm {band-centre}}$	8295.00 MHz & 8570.00 MHz
$V_{{\rm systemic,helio,optical}}$	560 km s^-1 (Paglione 1997)
Distance	3.8 Mpc
Bandwidth, channels, IFs	64 MHz, 64, 4
Spectral resolution	36 km s^-1
Minimum baseline	0.86 $k\lambda$
Beam size (natural weight)	$3.4'' \times 2.7''$ at -55 $^{\circ}$
Beam size (uniform weight)	$1.35'' \times 1.18''$ at -4 $^{\circ}$
Phase calibrator (B1950)	1320-446
Bandpass calibrator (B1950)	1226+023, 1320-446, 1934-638, 2251+158
Line and Continuum Properties
Peak continuum flux density	$(538 \pm 80)$ mJy beam^-1 (natural weighting)
Total continuum flux density	$(1424 \pm 220)$ mJy
Noise per image channel	0.21 mJy beam^-1
Peak line flux density	$(17.8 \pm 2.8)$ mJy
Integrated line flux	$(11.3 \pm 1.8) \times 10^{-22}$ W m^-2
Measured line width ( FWHM)	$(225 \pm 15)$ km s^-1
Deconvolved line width ( FWHM)	$(221 \pm 15)$ km s^-1
Centroid helio. optical vel.	$(581 \pm 15)$ km s^-1
No. of beam areas where line is observed	1.5 (naturally weighted)

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.