2019MNRAS.483..711A

Query : 2019MNRAS.483..711A

2019MNRAS.483..711A - Mon. Not. R. Astron. Soc., 483, 711-733 (2019/February-2)

Do sub-galactic regions follow the galaxy-wide X-ray scaling relations? The example of NGC 3310 and NGC 2276.

ANASTASOPOULOU K., ZEZAS A., GKIOKAS V. and KOVLAKAS K.

Abstract (from CDS):

We present results from Chandra observations of the X-ray starburst galaxies NGC 3310 and NGC 2276. We detect 27 discrete sources in NGC 3310, and 19 discrete sources in NGC 2276 with luminosities above 1.0 x 1038 erg s–1. The majority of the sources have photon indices of 1.7-2.0, typical for X-ray binaries. Both galaxies have large numbers of ultra-luminous X-ray sources (ULXs; sources with L(0.3-10.0 keV) > 1039 erg s–1), 14 for NGC 3310 concentrated on the circumnuclear star-forming ring and north spiral arm and 11 for NGC 2276 with the brighter ones on the west side of the galaxy which is compressed due to harassment by the intra-group medium it is moving into. We find for both galaxies that the ULX-hosting areas are located above the general LX-SFR scaling relations while other areas either follow or fall below the scaling relations. This indicates that sub-galactic regions follow the galaxy-wide scaling relations but with much larger scatter resulting from the age (and possibly metallicity) of their local stellar populations in agreement with recent theoretical and observational results. Such differences in age could be the origin of the scatter we observe in the low-SFR regime in the Lx-SFR scaling relations.

Abstract Copyright: © 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): galaxies: individual: NGC 3310 - galaxies: individual: NGC 2276 - galaxies: starburst - X-rays: binaries - X-rays: galaxies

VizieR on-line data: <Available at CDS (J/MNRAS/483/711): table1.dat-table12.dat>

Nomenclature: Fig. 1, Table 1: [AZG2019] NGC 3310 NN (Nos 1-31). Fig. 2, Table 2: [AZG2019] NGC 2276 NN (Nos 1-19).

Status at CDS : All or part of tables of objects will not be ingested in SIMBAD.

Simbad objects: 10

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Number of rows : 10
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 NGC 2206 Sy1 06 15 59.8325482128 -26 45 55.900396980   12.91   11.81 12.4 ~ 50 0
2 NGC 2207 AG? 06 16 22.0336889136 -21 22 21.759218400   11.48 10.65 10.21 11.9 ~ 301 4
3 IC 2163 AG? 06 16 27.9671433048 -21 22 33.133211832   12.55   11.28   ~ 172 2
4 [SRW2012] Src. 3c UX? 07 26 48.3 +85 45 49           ~ 14 0
5 NGC 2276 AG? 07 27 14.485 +85 45 16.20   12.3       ~ 393 0
6 NGC 2300 AG? 07 32 20.486 +85 42 31.90   12.2       ~ 346 0
7 NGC 3310 AGN 10 38 45.85707 +53 30 11.8940   12.45 12.15     ~ 809 1
8 NGC 3690 IG 11 28 31.0 +58 33 41   13.19 12.86     ~ 1015 4
9 NAME Antennae IG 12 01 53.170 -18 52 37.92           ~ 1749 0
10 M 101 GiP 14 03 12.583 +54 20 55.50   8.46 7.86 7.76   ~ 3138 2

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