2020ApJ...898L..30M

Query : 2020ApJ...898L..30M

2020ApJ...898L..30M - Astrophys. J., 898, L30-L30 (2020/August-1)

Hidden AGNs in dwarf galaxies revealed by MaNGA: light echoes, off-nuclear wanderers, and a new broad-line AGN.

MEZCUA M. and DOMINGUEZ SANCHEZ H.

Abstract (from CDS):

Active galactic nuclei (AGNs) in dwarf galaxies could host the relics of those early universe seed black holes that did not grow into supermassive black holes. Using MaNGA integral field unit (IFU) spectroscopy we have found a sample of 37 dwarf galaxies that show AGN ionization signatures in spatially resolved emission line diagnostic diagrams. The AGN signatures are largely missed by integrated emission line diagnostics for 23 of them. The bolometric luminosity of these 23 new AGN candidates is <=1040 erg s–1, fainter than that of single-fiber SDSS AGNs, X-ray AGNs, and radio AGNs in dwarf galaxies, which supports IFU spectroscopy as a powerful tool for identifying hidden and faint AGNs in dwarf galaxies. The AGN emission is in most cases offset from the optical center of the dwarf galaxy and shows a symmetric morphology, which indicates that either the AGNs are off-nuclear, that the central emission of the galaxy is dominated by star formation, or that the AGNs are turned off and we are observing a past ionization burst. One of the new AGNs shows a broad Hα emission line component, from which we derive a black hole mass in the realm of intermediate-mass black holes. This constitutes the first hidden type 1 AGN discovered in a dwarf galaxy based on IFU spectroscopy. The finding of this sample of hidden and faint AGNs has important implications for population studies of AGNs in dwarf galaxies and for seed black hole formation models.

Abstract Copyright: © 2020. The American Astronomical Society. All rights reserved.

Journal keyword(s): Active galactic nuclei - Dwarf galaxies

Simbad objects: 37

goto Full paper

goto View the references in ADS

Number of rows : 37
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 SDSS J032508.32-003241.7 G 03 25 08.337 -00 32 41.81           ~ 14 0
2 SDSS J074759.48+291126.5 G 07 47 59.4826764000 +29 11 26.521586988           ~ 15 0
3 LEDA 3087167 G 07 55 29.3788032432 +52 00 37.813121388           ~ 20 0
4 Z 148-92 AGN 08 00 53.2066769208 +28 07 49.373416884   15.7       ~ 19 0
5 NPM1G +50.0111 Sy2 08 04 35.5058557992 +50 42 30.792910284           ~ 36 0
6 2MASX J08253833+2108333 LIN 08 25 38.3733798240 +21 08 33.205709148           ~ 13 0
7 2MASS J10005482+4445531 AGN 10 00 54.8262654552 +44 45 53.210170620           ~ 16 0
8 MCG+08-18-066 G 10 05 08.319 +44 30 50.57   17       ~ 32 0
9 LEDA 2299601 G 10 13 27.7268731656 +47 30 58.232988576           ~ 19 0
10 LEDA 2274654 Sy2 10 23 32.5330641432 +46 03 27.937284696           ~ 25 0
11 LEDA 2240291 AGN 11 00 28.258 +44 15 39.48           ~ 30 0
12 LEDA 1676939 G 11 06 57.521 +22 50 08.87           ~ 21 0
13 LEDA 2265781 Sy2 11 13 55.2801164712 +45 29 18.185421912           ~ 17 0
14 MCG+09-19-073 Sy1 11 25 36.1539761184 +54 22 57.113791824   17.06 16.47     ~ 311 0
15 MCG+09-19-078 Sy2 11 26 37.7306810016 +51 34 23.038747824   17       ~ 46 0
16 2MASX J11340896+4915162 Sy2 11 34 09.0124541568 +49 15 16.306517232           ~ 28 0
17 MCG+05-31-132 AGN 13 06 36.4210010904 +27 52 22.830669012   15.5       ~ 79 0
18 LEDA 2292754 G 13 10 19.351 +47 07 26.50           ~ 26 0
19 LEDA 2017338 G 13 18 42.2166078504 +32 55 07.316784084   18.172       ~ 22 0
20 2MASS J13324560+2634498 Sy2 13 32 45.6194732208 +26 34 49.396736460           ~ 35 0
21 LEDA 3089782 SyG 13 35 06.5330032656 +22 39 42.583496724           ~ 17 0
22 LEDA 3811436 LIN 13 39 13.6610920344 +24 53 35.052507348           ~ 15 0
23 LEDA 1684573 G 13 41 09.4371807240 +23 16 40.461462480           ~ 19 0
24 LEDA 2076085 Sy1 13 43 00.8017837464 +36 09 56.332714644           ~ 36 0
25 LEDA 1663044 Sy2 13 46 26.9936764008 +22 04 36.179476824           ~ 26 0
26 LEDA 2441765 G 14 38 11.06028 +53 27 45.1179           ~ 16 0
27 LEDA 214336 G 14 49 21.0110044680 +47 25 02.971807068           ~ 14 0
28 LEDA 2387443 Sy2 14 55 27.9091557744 +51 02 51.714077424           ~ 15 0
29 SDSS J154137.28+441619.9 Sy2 15 41 37.2751555608 +44 16 19.889284908           ~ 9 0
30 2MASS J16040698+4432591 Sy2 16 04 06.9826010448 +44 32 59.069498820           ~ 14 0
31 LEDA 2275880 EmG 16 11 54.8673631344 +46 07 40.191461328           ~ 15 0
32 LEDA 2176258 G 16 18 38.0170657080 +41 08 12.472766556           ~ 16 0
33 SDSS J163852.08+401157.6 EmG 16 38 52.0951132560 +40 11 57.583532868           ~ 17 0
34 LEDA 2035542 Sy2 17 13 59.002 +33 36 25.69           ~ 22 0
35 SDSS J171644.04+324822.4 G 17 16 44.0322626376 +32 48 22.541049756           ~ 15 0
36 LEDA 2554265 G 17 28 24.0251907216 +57 00 07.327605564           ~ 17 0
37 LEDA 1166039 Sy2 23 43 18.0263024256 +00 26 32.898072948   19.31 18.70     ~ 20 0

To bookmark this query, right click on this link: simbad:objects in 2020ApJ...898L..30M and select 'bookmark this link' or equivalent in the popup menu