2019MNRAS.489.3939C


Query : 2019MNRAS.489.3939C

2019MNRAS.489.3939C - Mon. Not. R. Astron. Soc., 489, 3939-3952 (2019/November-1)

Constraints on high-J CO emission lines in z ∼ 6 quasars.

CARNIANI S., GALLERANI S., VALLINI L., PALLOTTINI A., TAZZARI M., FERRARA A., MAIOLINO R., CICONE C., FERUGLIO C., NERI R., D'ODORICO V., WANG R. and LI J.

Abstract (from CDS):

We present Atacama Large Millimeter/submillimeter Array (ALMA) observations of eight highly excited CO ( J_ up_ > 8) lines and continuum emission in two z ∼ 6 quasars: SDSS J231038.88+185519.7 (hereafter J2310), for which CO(8-7), CO(9-8), and CO(17-16) lines have been observed, and ULAS J131911.29+095951.4 (J1319), observed in the CO(14-13), CO(17-16), and CO(19-18) lines. The continuum emission of both quasars arises from a compact region (<0.9 kpc). By assuming a modified blackbody law, we estimate dust masses of log(Mdust/M) = 8.75 ± 0.07 and log(Mdust/M) = 8.8 ± 0.2 and dust temperatures of Tdust = 76 ± 3 K and T_ dust=66+15^–10 K, respectively, for J2310 and J1319. Only CO(8-7) and CO(9-8) in J2310 are detected, while 3σ upper limits on luminosities are reported for the other lines of both quasars. The CO line luminosities and upper limits measured in J2310 and J1319 are consistent with those observed in local active galactic nuclei and starburst galaxies, and other z ∼ 6 quasars, except for SDSS J1148+5251 (J1148), the only quasar at z = 6.4 with a previous CO(17-16) line detection. By computing the CO spectral line energy distributions normalized to the CO(6-5) line and far-infrared luminosities for J2310, J1319, and J1148, we conclude that different gas heating mechanisms (X-ray radiation and/or shocks) may explain the different CO luminosities observed in these z ∼ 6 quasar. Future J_ up_ > 8 CO observations will be crucial to understand the processes responsible for molecular gas excitation in luminous high-z quasars.

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

Journal keyword(s): galaxies: active - galaxies: high-redshift - galaxies: ISM - quasars: individual: SDSS J231038.88+185519.7 - quasars: individual: ULAS J131911.29+095951.4

CDS comments: ULAS J131911.29+095951.4 is a misprint for ULAS J131911.29+095051.4.

Simbad objects: 35

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Number of rows : 35
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 NGC 34 Sy2 00 11 06.612 -12 06 28.33   14.14 13.52     ~ 334 0
2 NGC 253 SyG 00 47 33.134 -25 17 19.68   8.03   6.94 8.1 ~ 3162 2
3 MCG+12-02-001 G 00 54 03.943 +73 05 05.23   16       ~ 100 1
4 IC 1623 IG 01 07 47.2 -17 30 25   15       ~ 283 1
5 NGC 507 BiC 01 23 39.950 +33 15 22.22   13.0       ~ 416 3
6 M 77 GiP 02 42 40.7091669408 -00 00 47.859690204 9.70 9.61 8.87 10.1 9.9 ~ 4380 2
7 NGC 1365 Sy1 03 33 36.458 -36 08 26.37 10.48 10.08 9.63 8.79 9.7 ~ 1661 2
8 NGC 1614 AGN 04 34 00.027 -08 34 44.57   14.66 13.99     ~ 644 0
9 LEDA 17155 Sy2 05 21 01.3994605776 -25 21 45.321827832   15.47 14.75     ~ 465 0
10 NGC 2146 SBG 06 18 37.710 +78 21 25.27 11.67 11.38 10.59     ~ 673 2
11 NGC 2623 LIN 08 38 24.016 +25 45 16.29 14.10 13.99 13.36     ~ 469 1
12 M 82 IG 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 5636 6
13 NGC 3256 IG 10 27 51.284 -43 54 13.55   11.83 11.33 10.62 11.9 ~ 807 2
14 IC 694 G 11 28 27.312 +58 34 42.29   18.2       ~ 246 2
15 NGC 3690 IG 11 28 31.326 +58 33 41.80   13.19 12.86     ~ 944 4
16 SDSS J114816.64+525150.3 QSO 11 48 16.647 +52 51 50.31   25.73 25.04     ~ 427 0
17 ESO 320-30 H2G 11 53 11.722 -39 07 48.72   13.30   11.86   ~ 168 1
18 NGC 4355 Sy2 12 26 54.6206739120 -00 52 39.421212996   14.21 13.37     ~ 458 2
19 Mrk 231 Sy1 12 56 14.2341182928 +56 52 25.238373852   14.68 13.84     ~ 1914 3
20 NGC 4945 Sy2 13 05 27.279 -49 28 04.44   9.31 14.40 7.55   ~ 1383 2
21 2MASX J13150638-5509225 Sy2 13 15 06.383 -55 09 22.60   17.3       ~ 127 0
22 SDSS J131911.29+095051.3 QSO 13 19 11.291 +09 50 51.49           ~ 74 0
23 NGC 5135 Sy2 13 25 44.059 -29 50 01.24   12.58 13.35 11.53 12.2 ~ 459 1
24 ESO 173-15 G 13 27 23.774 -57 29 22.14   14.9   14.3 13.7 ~ 69 1
25 M 83 SBG 13 37 00.91920 -29 51 56.7400 8.85 8.11 7.52 7.21   ~ 2426 2
26 Mrk 273 Sy2 13 44 42.1883001096 +55 53 13.596220932   15.68 14.91     ~ 870 3
27 NAME Circinus Galaxy Sy2 14 13 09.906 -65 20 20.47   10.89 9.84 10.6 10.0 ~ 1112 2
28 NGC 6240 Sy2 16 52 58.861 +02 24 03.55   14.31 13.37     ~ 1572 2
29 LEDA 60189 LIN 17 23 21.943 -00 17 00.96   15.1       ~ 400 0
30 IC 4687 AGN 18 13 39.829 -57 43 31.25   14.35 14.3 12.78   ~ 129 1
31 NGC 7469 Sy1 23 03 15.674 +08 52 25.28 12.60 13.00 12.34     ~ 2007 3
32 SDSS J231038.88+185519.7 QSO 23 10 38.888 +18 55 19.72           ~ 61 0
33 NGC 7552 GiP 23 16 10.767 -42 35 05.39 11.34 11.22 10.57 10.08 11.1 ~ 531 3
34 NGC 7771 GiG 23 51 24.880 +20 06 42.57 13.42 13.08 12.25     ~ 326 4
35 Mrk 331 GiP 23 51 26.731 +20 35 10.22   14.9       ~ 221 0

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2022.10.03-00:39:03

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