2019MNRAS.485..428B

Query : 2019MNRAS.485..428B

2019MNRAS.485..428B - Mon. Not. R. Astron. Soc., 485, 428-439 (2019/May-1)

Outlying Hα emitters in SDSS IV MaNGA.

BAIT O., WADADEKAR Y. and BARWAY S.

Abstract (from CDS):

We have carried out a systematic search for outlying Hα emitters in the entire Data Release 14 of the Sloan Digital Sky Survey (SDSS) IV Mapping Nearby Galaxies at APO (MaNGA) survey. We have discovered six outlying Hα emitters with no bright underlying optical continuum emission in the imaging Data Release 5 from the Dark Energy Camera Legacy Survey (DECaLS) and Data Release 6 of the Mayall z-band Legacy Survey (MzLS) + Beijing-Arizona Sky Survey (BASS). They also show a velocity field that is different from that of the host galaxy. These outlying Hα emitters all have extended structure in the Hα image. Their emission line ratios show that they are photoionized due to an active galactic nucleus (AGN) or a mixture of both an AGN and star formation. Some of them are very likely to be fainter counterparts of Hanny's Voorwerp-like objects.

Abstract Copyright: © 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): galaxies: active - galaxies: evolution - galaxies: general - galaxies: star formation - galaxies: statistics

Nomenclature: Tables 1-2: [BWB2019] XN.N (Nos X1, X2.1-X2.2, X3-X5).

Simbad objects: 21

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Number of rows : 21
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 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
2 NAME 30 Dor Nebula SFR 05 38 36.0 -69 05 11           ~ 1276 2
3 LEDA 1678924 EmG 08 18 49.6185917400 +22 57 16.401675564           ~ 17 0
4 [BWB2019] X4 LSB 08 18 50.2380 +22 57 14.864           ~ 2 0
5 SDSS J084746.76+540136.0 G 08 47 46.7734704768 +54 01 35.974524360           ~ 9 0
6 [BWB2019] X3 EmO 08 47 47.4300 +54 01 29.807           ~ 1 0
7 MCG+09-15-024 G 08 47 51.4991990400 +54 01 22.764759276   16       ~ 12 0
8 SDSS J094103.80+344334.1 G 09 41 03.80160 +34 43 34.1148           ~ 100 0
9 IC 2497 rG 09 41 04.1049384864 +34 43 58.172413980           ~ 90 1
10 M 82 AGN 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 6156 6
11 Z 241-83 EmG 11 08 00.6485346888 +46 51 02.692484496   15.2       ~ 31 0
12 [BWB2019] X5 EmO 11 15 47.0040 +50 24 09.997           ~ 1 0
13 LEDA 2371975 Sy2 11 15 47.4603547272 +50 24 05.665268340           ~ 37 0
14 [BWB2019] X1 EmO 14 09 06.7100 +53 27 55.644           ~ 1 0
15 LEDA 2441793 LIN 14 09 06.8735312544 +53 27 48.738288492   18.4 17.2     ~ 18 0
16 LEDA 1140731 G 14 11 03.985 -00 32 42.40   18.858   18.283   ~ 16 0
17 LEDA 140637 Sy2 16 30 52.3196195424 +41 17 10.126045428           ~ 20 0
18 [BWB2019] X2.1 EmO 16 30 52.6850 +41 17 22.074           ~ 1 0
19 2MASS J16305311+4117109 Sy2 16 30 53.1087745896 +41 17 10.825349136           ~ 8 0
20 [BWB2019] X2.2 EmO 16 30 53.2680 +41 17 04.565           ~ 1 0
21 ESO 185-31 GiG 19 57 22.192 -55 08 13.55   15.73   14.50   ~ 31 0

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