2015MNRAS.453.1249A

Query : 2015MNRAS.453.1249A

2015MNRAS.453.1249A - Mon. Not. R. Astron. Soc., 453, 1249-1267 (2015/October-3)

Discovery of HI gas in a young radio galaxy at z = 0.44 using the Australian Square Kilometre Array Pathfinder.

ALLISON J.R., SADLER E.M., MOSS V.A., WHITING M.T., HUNSTEAD R.W., PRACY M.B., CURRAN S.J., CROOM S.M., GLOWACKI M., MORGANTI R., SHABALA S.S., ZWAAN M.A., ALLEN G., AMY S.W., AXTENS P., BALL L., BANNISTER K.W., BARKER S., BELL M.E., BOCK D.C.-J., BOLTON R., BOWEN M., BOYLE B., BRAUN R., BROADHURST S., BRODRICK D., BROTHERS M., BROWN A., BUNTON J.D., CANTRALL C., CHAPMAN J., CHENG W., CHIPPENDALE A.P., CHUNG Y., COORAY F., CORNWELL T., DEBOER D., DIAMOND P., EDWARDS P.G., EKERS R., FEAIN I., FERRIS R.H., FORSYTH R., GOUGH R., GRANCEA A., GUPTA N., GUZMAN J.C., HAMPSON G., HARVEY-SMITH L., HASKINS C., HAY S., HAYMAN D.B., HEYWOOD I., HOTAN A.W., HOYLE S., HUMPHREYS B., INDERMUEHLE B.T., JACKA C., JACKSON C., JACKSON S., JEGANATHAN K., JOHNSTON S., JOSEPH J., KENDALL R., KESTEVEN M., KIRALY D., KORIBALSKI B.S., LEACH M., LENC E., LENSSON E., MacKAY S., MacLEOD A., MARQUARDING M., MARVIL J., McCLURE-GRIFFITHS N., McCONNELL D., MIRTSCHIN P., NORRIS R.P., NEUHOLD S., NG A., O'SULLIVAN J., PATHIKULANGARA J., PEARCE S., PHILLIPS C., POPPING A., QIAO R.Y., REYNOLDS J.E., ROBERTS P., SAULT R.J., SCHINCKEL A., SERRA P., SHAW R., SHIELDS M., SHIMWELL T., STOREY M., SWEETNAM T., TROUP E., TURNER B., TUTHILL J., TZIOUMIS A., VORONKOV M.A., WESTMEIER T. and WILSON C.D.

Abstract (from CDS):

We report the discovery of a new 21-cm HI absorption system using commissioning data from the Boolardy Engineering Test Array of the Australian Square Kilometre Array Pathfinder (ASKAP). Using the 711.5-1015.5 MHz band of ASKAP we were able to conduct a blind search for the 21-cm line in a continuous redshift range between z = 0.4 and 1.0, which has, until now, remained largely unexplored. The absorption line is detected at z = 0.44 towards the GHz-peaked spectrum radio source PKS B1740-517 and demonstrates ASKAP's excellent capability for performing a future wide-field survey for HI absorption at these redshifts. Optical spectroscopy and imaging using the Gemini-South telescope indicates that the HI gas is intrinsic to the host galaxy of the radio source. The narrow [Oiii] emission lines show clear double-peaked structure, indicating either large-scale outflow or rotation of the ionized gas. Archival data from the XMM-Newton satellite exhibit an absorbed X-ray spectrum that is consistent with a high column density obscuring medium around the active galactic nucleus. The HI absorption profile is complex, with four distinct components ranging in width from 5 to 300 km/s and fractional depths from 0.2 to 20 percent. In addition to systemic HI gas, in a circumnuclear disc or ring structure aligned with the radio jet, we find evidence for a possible broad outflow of neutral gas moving at a radial velocity of v ∼ 300 km/s. We infer that the expanding young radio source (tage ~ 2500 yr) is cocooned within a dense medium and may be driving circumnuclear neutral gas in an outflow of ∼ 1 M☉/yr.

Abstract Copyright: © 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2015)

Journal keyword(s): methods: data analysis - ISM: jets and outflows - galaxies: active - galaxies: ISM - radio lines: galaxies

Errata: erratum vol. 456, p. 3030 (2016)

Simbad objects: 15

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Number of rows : 15
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
2 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
3 NGC 2110 Sy2 05 52 11.3768668776 -07 27 22.507465392   14.77 13.51 11.86   ~ 712 1
4 QSO J1130-1449 Bla 11 30 07.0523452128 -14 49 27.388021944   17.17 16.90 16 16.97 ~ 739 1
5 PKS 1345+12 Sy2 13 47 33.36161873 +12 17 24.2398927   19.28 18.44 15.718   ~ 652 2
6 Z 162-21 BLL 13 52 17.8719816576 +31 26 46.487381604   16.10 15.10     ~ 502 3
7 6C 150412+374224 Bla 15 06 09.52997529 +37 30 51.1325012   21.2 21.2 20.60   ~ 213 1
8 QSO B1549-790 Bla 15 56 58.86979525 -79 14 04.2817241   18.80 18.800 17.84   ~ 221 1
9 ICRF J160913.3+264129 Sy2 16 09 13.3196 +26 41 29.042   19       ~ 249 1
10 * mu. Ara PM* 17 44 08.7031414872 -51 50 02.591603160   5.85 5.15     G3IV-V 578 2
11 PKS 1740-51 rG 17 44 25.45488279 -51 44 43.7403710     20.2     ~ 99 2
12 QSO B1814-637 Bla 18 19 35.00241 -63 45 48.1926   16.80 14.40 13.4   ~ 154 1
13 ICRF J193925.0-634245 Sy2 19 39 25.0245304992 -63 42 45.640373400   18.87 18.37 17.64   ~ 1332 2
14 IC 5063 Bla 20 52 02.15 -57 04 06.7   12.92 13.60 11.30   ~ 710 1
15 Feige 110 HS* 23 19 58.3996844256 -05 09 56.171142864 10.360 11.45 11.50 11.970 12.145 sdO8VIIIHe5 673 1

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