2016MNRAS.459..220S

Query : 2016MNRAS.459..220S

2016MNRAS.459..220S - Mon. Not. R. Astron. Soc., 459, 220-231 (2016/June-2)

Identifying OH imposters in the ALFALFA Neutral Hydrogen Survey.

SUESS K.A., DARLING J., HAYNES M.P. and GIOVANELLI R.

Abstract (from CDS):

OH megamasers (OHMs) are rare, luminous molecular masers that are typically observed in (ultra) luminous infrared galaxies and serve as markers of major galaxy mergers. In blind emission line surveys such as the Arecibo Legacy Fast Arecibo L-Band Feed Array (ALFALFA) survey for neutral hydrogen (H i), OHMs at z ∼ 0.2 can mimic z ∼ 0.05 H i lines. We present the results of optical spectroscopy of ambiguous H i detections in the ALFALFA 40 per cent data release detected by the Wide Field Infrared Survey Explorer (WISE) but with uncertain optical counterparts. The optical redshifts, obtained from observations at the Apache Point Observatory, revealed five new OHMs and identified 129 H i optical counterparts. 60 candidates remain ambiguous. The new OHMs are the first detected in a blind spectral line survey. The number of OHMs in ALFALFA is consistent with predictions from the OH luminosity function. Additionally, the mid-infrared magnitudes and colours of the OHM host galaxies found in a blind survey do not seem to differ from those found in previous targeted surveys. This validates the methods used in previous IR-selected OHM surveys and indicates there is no previously unknown OHM-producing population at z ∼ 0.2. We also provide a method for future surveys to separate OH megamasers from 99 per cent of H i line emitters without optical spectroscopy by using WISE infrared colours and magnitudes. Since the fraction of OHMs found in flux-limited H i surveys is expected to increase with the survey's redshift, this selection method can be applied to future flux-limited high-redshift hydrogen surveys.

Abstract Copyright: © 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): line: identification - masers - galaxies: distances and redshifts - galaxies: spiral - galaxies: starburst - radio lines: galaxies

VizieR on-line data: <Available at CDS (J/MNRAS/459/220): table3.dat table4.dat>

Simbad objects: 134

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Number of rows : 134
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 LEDA 1937746 G 00 01 29.9891317335 +31 14 02.845639596           ~ 6 0
2 UGC 26 A AG? 00 03 47.493 +31 20 37.67           ~ 8 0
3 MCG+05-01-037 G 00 09 48.8488614456 +28 41 23.770949460   16       ~ 12 0
4 UGC 107 G 00 11 38.1285628080 +27 56 52.823233932   16.0       ~ 28 0
5 LEDA 1393 G 00 21 36.475 +25 29 34.96           ~ 9 0
6 LEDA 1749895 G 00 22 51.574 +25 47 20.05           ~ 7 0
7 2MASX J00302394+2519040 G 00 30 23.9499453144 +25 19 03.723776832           ~ 2 0
8 Z 500-40 AG? 00 32 12.1224336120 +31 24 59.541205788   15.7       ~ 23 0
9 SDSS J004342.83+255150.1 AG? 00 43 42.831 +25 51 50.12           ~ 6 0
10 LEDA 1845130 AG? 00 48 25.3 +28 45 36           ~ 9 0
11 MCG+04-03-033 G 01 00 34.0236784992 +27 05 52.737828180   15       ~ 13 0
12 LEDA 1930390 G 01 01 06.0 +31 04 20           ~ 6 0
13 LEDA 1452829 G 01 09 08.522 +14 13 58.26   18.7       ~ 7 0
14 LEDA 5353 G 01 26 26.0099267808 +31 00 32.584016628   16.5       ~ 11 0
15 LEDA 5795 G 01 33 26.3812307520 +28 56 23.284372128   16.5       ~ 11 0
16 LEDA 1950028 G 01 41 40.5 +31 29 48           ~ 9 0
17 Z 437-24 Sy1 01 46 36.932 +14 41 30.09   15.7       ~ 27 0
18 LEDA 1490804 G 01 52 23.89 +15 41 01.1           ~ 5 0
19 LEDA 1922778 G 01 53 27.6 +30 53 53           ~ 6 0
20 LEDA 74042 AG? 01 55 21.579 +31 37 30.98   16.5       ~ 10 0
21 LEDA 74068 G 02 01 49.8612866616 +29 26 47.663913336   17       ~ 8 0
22 LEDA 1932913 AG? 02 04 27.04 +31 07 34.3           ~ 7 0
23 2MASS J02062640+1605376 G 02 06 26.3740279800 +16 05 37.375469916   17.42 17.40 16.06 16.40 ~ 1 0
24 LEDA 1487912 G 02 09 48.806 +15 33 44.81           ~ 6 0
25 LEDA 1465871 G 02 10 22.4376147408 +14 44 15.737558604           ~ 6 0
26 LEDA 2816197 G 02 11 33.534 +14 14 20.91           ~ 9 0
27 AGC 123103 G 02 11 45.35 +31 11 30.2           ~ 4 0
28 LEDA 8450 G 02 12 28.75 +29 10 58.7   16       ~ 11 0
29 LEDA 74080 AG? 02 15 13.958 +31 05 34.63   16.5       ~ 12 0
30 LEDA 1468584 AG? 02 18 47.3 +14 50 42           ~ 8 0
31 LEDA 1880366 G 02 19 54.6 +29 50 50           ~ 6 0
32 IRAS F02187+2749 G 02 21 39.7377654684 +28 03 07.148551543           ~ 10 0
33 Z 483-18 AG? 02 22 55.36 +25 18 35.1   15.7       ~ 15 0
34 LEDA 5060005 G 02 23 12.1 +28 27 24           ~ 6 0
35 MCG+03-07-008 G 02 24 51.2173961784 +16 10 38.871916500   15       ~ 16 0
36 AGC 123005 G 02 25 42.3867152845 +31 37 22.589269044   16.795 16.060     ~ 5 0
37 Z 483-45 G 02 25 55.8267707064 +24 51 25.055319708   15.6       ~ 13 0
38 LEDA 2800934 G 02 25 58.735 +27 16 13.99           ~ 10 0
39 LEDA 97507 G 02 30 06.3637971456 +28 40 27.243958188           ~ 16 0
40 LEDA 1703935 AG? 02 31 41.9462537448 +24 17 20.546666268           ~ 9 0
41 LEDA 9670 AG? 02 32 33.659 +27 56 26.62   16.5       ~ 14 0
42 AGC 123163 G 02 32 46.6 +28 33 11           ~ 4 0
43 LEDA 1800577 AG? 02 33 28.409 +27 11 41.19           ~ 13 0
44 Z 505-9 G 02 33 47.0236662696 +30 11 21.977675340   15.7       ~ 21 0
45 UGC 2155 G 02 40 05.6972250192 +14 22 33.240475308   16.0       ~ 14 0
46 LEDA 1783064 AG? 02 41 31.764 +26 37 45.21   16.0       ~ 13 0
47 LEDA 1463587 G 02 46 05.0 +14 39 14           ~ 5 0
48 2MASS J02463944+1508559 G 02 46 39.5593534512 +15 08 56.396259852           ~ 1 0
49 LEDA 1468647 G 02 47 03.660 +14 50 51.78           ~ 8 0
50 Z 505-54 AG? 02 48 53.508 +28 16 24.59   15.7       ~ 15 0
51 LEDA 1473528 G 02 49 22.153 +15 02 14.50           ~ 9 0
52 AGC 749015 G 02 53 03.78 +14 37 39.3           ~ 1 0
53 AGC 122809 G 02 59 05.6 +27 10 56           ~ 5 0
54 2MASX J02593158+2554122 rG 02 59 31.58307 +25 54 12.2830           ~ 7 0
55 LEDA 89559 AG? 02 59 59.4 +30 59 13   16.5       ~ 8 0
56 AGC 748916 G 03 06 47.4 +14 36 33           ~ 4 0
57 LEDA 1480759 AG? 03 07 15.343 +15 17 46.11           ~ 8 0
58 AGC 174684 G 07 30 19.3 +06 06 36           ~ 4 0
59 LEDA 1300839 G 07 35 32.6635958784 +06 26 46.247021556           ~ 5 0
60 AGC 174481 AG? 07 36 02.4 +13 32 17           ~ 5 0
61 AGC 174491 G 07 37 32.2 +12 52 18           ~ 4 0
62 Z 117-64 LSB 07 40 35.092 +26 08 05.95   15.6       ~ 22 0
63 SDSS J080247.11+244616.9 EmG 08 02 47.1137314104 +24 46 16.983946272           ~ 9 0
64 LEDA 4153561 G 08 05 20.8272819336 +05 57 06.669245160           ~ 5 0
65 Z 31-72 Sy1 08 14 25.3384289568 +04 20 32.894086128   15.4       ~ 45 0
66 SDSS J081710.41+263356.1 G 08 17 10.415 +26 33 56.11           ~ 4 0
67 IRAS 08201+2801 LIN 08 23 12.6165437400 +27 51 39.639008772           ~ 63 0
68 LEDA 1273598 G 08 26 26.1 +04 48 38           ~ 8 0
69 SDSS J082907.22+275655.0 G 08 29 07.22030 +27 56 54.9997           ~ 5 0
70 LEDA 1822485 G 08 54 02.7177429840 +27 57 30.562768872     17.0     ~ 9 0
71 AGC 219215 G 11 11 26.0 +05 20 44           ~ 2 0
72 SDSS J113201.39+272451.4 G 11 32 01.390 +27 24 51.40           ~ 4 0
73 LEDA 1438008 AG? 11 42 01.256 +13 41 55.46           ~ 9 0
74 AGC 227982 G 12 29 22.81 +04 22 46.1           ~ 3 0
75 MCG+02-33-026 G 12 48 35.533 +09 07 33.09   15.7       ~ 6 0
76 IRAS F12597+1115 rG 13 02 13.757 +10 59 42.64           ~ 6 0
77 Z 101-22 G 13 19 28.5076189608 +14 34 39.146411208   15.6       ~ 19 0
78 SDSS J132102.19+260833.5 G 13 21 02.2069106136 +26 08 33.470774844           ~ 4 0
79 AGC 749554 G 13 25 37.83 +24 47 12.5           ~ 1 0
80 Z 73-82 G 13 51 06.133 +08 20 38.90   15.6       ~ 14 0
81 MCG+03-36-040 GiP 14 04 38.086 +15 28 31.00   15.2       ~ 8 0
82 Z 76-68 GiG 14 49 34.5474957888 +11 14 53.123191332   15.3       ~ 25 0
83 SDSS J145233.39+060115.0 G 14 52 33.38952 +06 01 14.7900   20.20 18.34 18.52   ~ 1 0
84 LEDA 1293205 G 14 52 35.920 +06 01 26.99           ~ 9 0
85 LEDA 1483775 G 14 59 49.3427779488 +15 24 21.245911308           ~ 6 0
86 SDSS J150157.30+091118.1 G 15 01 57.303 +09 11 18.10           ~ 3 0
87 LEDA 1790676 G 15 08 35.0 +26 51 56           ~ 2 0
88 SDSS J151333.16+121210.9 G 15 13 33.16392 +12 12 10.9836           ~ 1 0
89 SDSS J151956.28+253618.1 G 15 19 56.28842 +25 36 18.1636           ~ 6 0
90 IC 1127 SyG 15 34 57.22396 +23 30 11.6084   14.76 13.88     ~ 3090 4
91 LEDA 4475521 G 15 43 49.185 +14 38 56.71           ~ 5 0
92 LEDA 1269737 AG? 15 45 55.994 +04 32 49.82           ~ 11 0
93 NVSS J155538+143907 Rad 15 55 37.945 +14 39 05.63           ~ 3 0
94 LEDA 1499298 AG? 15 56 37.5220360824 +16 02 24.052516656           ~ 6 0
95 LEDA 1262577 G 16 29 34.0 +04 02 28           ~ 5 0
96 LEDA 1291328 G 16 29 42.528 +05 55 05.30           ~ 7 0
97 LEDA 1444174 G 21 45 34.1757238584 +13 55 11.492367888           ~ 6 0
98 Z 450-6 G 21 50 16.3 +15 52 38   15.7       ~ 12 0
99 Z 427-34 G 21 52 52.8863931048 +15 34 18.550731144   15.6       ~ 11 0
100 AGC 748661 G 21 53 52.5 +16 06 34           ~ 4 0
101 LEDA 85221 G 22 09 54.1726752576 +26 31 57.204856776   16       ~ 6 0
102 LEDA 1923061 AG? 22 11 33.6 +30 54 13           ~ 7 0
103 LEDA 3089381 G 22 21 21.0041579928 +27 50 33.216346968           ~ 6 0
104 Z 429-4 G 22 23 55.6768185816 +15 14 47.325381504   15.6       ~ 13 0
105 LEDA 1727820 G 22 35 31.2 +25 10 39           ~ 7 0
106 LEDA 1755067 G 22 38 27.5 +25 55 03           ~ 6 0
107 LEDA 85276 AG? 22 41 05.552 +15 49 24.18   15.5       ~ 9 0
108 LEDA 1869613 EmG 22 42 30.820 +29 32 29.50           ~ 12 0
109 LEDA 141044 G 22 48 33.926 +24 32 04.52           ~ 17 0
110 SDSS J225030.15+315112.7 AG? 22 50 30.155 +31 51 12.77           ~ 5 0
111 AGC 321453 G 22 57 20.88 +31 53 16.0           ~ 2 0
112 LEDA 70448 G 23 05 43.440 +27 12 45.90   16       ~ 11 0
113 LEDA 1451081 G 23 06 36.703 +14 10 14.76           ~ 6 0
114 LEDA 1938584 EmG 23 14 22.1 +31 15 06           ~ 7 0
115 SDSS J231551.33+253428.4 G 23 15 51.33096 +25 34 28.4736           ~ 1 0
116 SDSS J231643.23+244148.4 G 23 16 43.23864 +24 41 48.4296   15.38 17.29 15.74 16.10 ~ 1 0
117 LEDA 1857219 AG? 23 20 17.8490791776 +29 09 00.053246268           ~ 9 0
118 AGC 333331 G 23 25 10.17 +24 50 47.8           ~ 1 0
119 LEDA 1743923 G 23 25 51.8 +25 38 21           ~ 8 0
120 LEDA 1874639 G 23 26 36.9 +29 41 25           ~ 10 0
121 LEDA 3089114 AG? 23 27 08.935 +30 24 17.60           ~ 10 0
122 2MASX J23285463+3104598 G 23 28 54.6653485800 +31 04 59.440878804           ~ 2 0
123 AGC 333398 G 23 29 47.3 +30 15 25           ~ 4 0
124 LEDA 1851333 AG? 23 32 11.0 +28 57 32           ~ 8 0
125 UGC 12658 G 23 32 44.7921217056 +31 06 49.366579212   16.0       ~ 18 0
126 LEDA 1792253 G 23 43 24.3 +26 54 57           ~ 10 0
127 LEDA 1963337 G 23 44 11.8251717404 +31 45 57.781276725           ~ 8 0
128 SDSS J234557.53+290958.4 G 23 45 57.53136 +29 09 58.4244           ~ 1 0
129 AGC 333232 G 23 46 28.30 +27 44 23.6           ~ 2 0
130 AGC 333205 G 23 46 29.34 +27 41 31.6           ~ 1 0
131 SDSS J235347.85+253529.6 G 23 53 47.85384 +25 35 29.6052           ~ 1 0
132 LEDA 72880 G 23 55 29.4354471048 +27 59 02.143193244   16       ~ 9 0
133 LEDA 1902499 G 23 56 48.6876018432 +30 24 22.514015304           ~ 6 0
134 AGC 333239 G 23 59 16.84 +27 45 21.4           ~ 1 0

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