2019ApJ...876...39G

Query : 2019ApJ...876...39G

2019ApJ...876...39G - Astrophys. J., 876, 39-39 (2019/May-1)

Spectroscopy of NGC 4258 globular cluster candidates: membership confirmation and kinematics.

GONZALEZ-LOPEZLIRA R.A., MAYYA Y.D., LOINARD L., ALAMO-MARTINEZ K., HEALD G., GEORGIEV I.Y., ORDENES-BRICENO Y., LANCON A., LARA-LOPEZ M.A., LOMELI-NUNEZ L., BRUZUAL G. and PUZIA T.H.

Abstract (from CDS):

We present multiobject spectroscopic observations of 23 globular cluster candidates (GCCs) in the prototypical megamaser galaxy NGC 4258, carried out with the Optical System for Imaging and low-Intermediate-Resolution Integrated Spectroscopy instrument at the 10.4 m Gran Telescopio Canarias. The candidates have been selected based on the (u* - i') versus (i' - Ks) diagram, in the first application of the u*i'Ks method to a spiral galaxy. In the spectroscopy presented here, 70% of the candidates are confirmed as globular clusters (GCs). Our results validate the efficiency of the u*i'Ks method in the sparser GC systems of spirals, and given the downward correction to the total number of GCs, the agreement of the galaxy with the correlations between black hole mass and the total number and mass of GCs is actually improved. We find that the GCs, mostly metal-poor, corotate with the H I disk, even at large galactocentric distances.

Abstract Copyright: © 2019. The American Astronomical Society. All rights reserved.

Journal keyword(s): galaxies: evolution - galaxies: formation - galaxies: kinematics and dynamics - galaxies: spiral - galaxies: star clusters: general - globular clusters: general

Nomenclature: Table 2: [GML2019] JHHMMSS+DDMMSS N=11, GLL JHHMMSS+DDMMSS N=2 added.

Simbad objects: 24

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Number of rows : 24
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 M 32 GiG 00 42 41.82480 +40 51 54.6120 9.51 9.03 8.08     ~ 2154 2
2 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 12635 1
3 M 81 Sy2 09 55 33.1726556496 +69 03 55.062505368   7.89 6.94     ~ 4444 3
4 GLL J121851+471400 GlC 12 18 51.9792324792 +47 14 00.776410440           ~ 1 0
5 GLL J121852+472201 GlC 12 18 52.9 +47 22 02           ~ 1 0
6 GLL J121854+472318 GlC 12 18 54.3739032672 +47 23 18.681045432           ~ 1 0
7 GLL J121856+471411 GlC 12 18 56.3 +47 14 12           ~ 1 0
8 GLL J121857+472330 GlC 12 18 57.2 +47 23 30           ~ 1 0
9 M 106 Sy2 12 18 57.620 +47 18 13.39   9.14 8.41 8.11   ~ 2362 3
10 GLL J121859+472107 GlC 12 18 59.9955455688 +47 21 07.310934396           ~ 1 0
11 [GML2019] J121901+471859 GlC 12 19 01.2636634152 +47 18 59.855671368           ~ 1 0
12 [L2004] n4258-1220 GlC 12 19 01.5379551840 +47 19 05.841751296   21.30 20.51     ~ 2 0
13 GLL J121902+472048 GlC 12 19 02.0420631024 +47 20 48.848775252           ~ 1 0
14 GLL J121902+472125 GlC 12 19 02.9324521656 +47 21 26.074931904           ~ 1 0
15 GLL J121902+472043 GlC 12 19 02.9627515368 +47 20 43.156952232           ~ 1 0
16 [L2004] n4258-1399 GlC 12 19 08.3288730696 +47 13 56.082922392   21.20 20.48     ~ 2 0
17 GLL J121925+471228 GlC 12 19 25.8677203680 +47 12 28.453032180           ~ 1 0
18 GLL J121928+471152 GlC 12 19 28.4 +47 11 52           ~ 1 0
19 GLL J121929+471215 GlC 12 19 29.0715644208 +47 12 14.984429364           ~ 1 0
20 GLL J121934+471316 GlC 12 19 34.6728942240 +47 13 16.550699412           ~ 1 0
21 M 87 AGN 12 30 49.42338414 +12 23 28.0436859 10.16 9.59 8.63   7.49 ~ 7185 3
22 GD 153 WD* 12 57 02.3224909560 +22 01 52.634778240 11.883 13.060 13.349 13.488 13.669 DA1.2 354 0
23 Ross 640 WD* 16 28 25.0030896166 +36 46 15.846877416   14.01   13.9   DZ6 204 0
24 NGC 7331 LIN 22 37 04.0506038088 +34 24 56.800076508 10.65 10.35 9.48     ~ 1227 2

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