2016MNRAS.459..771H

Query : 2016MNRAS.459..771H

2016MNRAS.459..771H - Mon. Not. R. Astron. Soc., 459, 771-778 (2016/June-2)

Keck/MOSFIRE spectroscopy of five ULX counterparts.

HEIDA M., JONKER P.G., TORRES M.A.P., ROBERTS T.P., WALTON D.J., MOON D.-S., STERN D. and HARRISON F.A.

Abstract (from CDS):

We present H-band spectra of the candidate counterparts of five ultraluminous X-ray sources (ULXs; two in NGC 925, two in NGC 4136 and Holmberg II X-1) obtained with Keck/MOSFIRE (Multi-Object Spectrometer for Infra-Red Exploration). The candidate counterparts of two ULXs (J022721+333500 in NGC 925 and J120922+295559 in NGC 4136) have spectra consistent with (M-type) red supergiants (RSGs). We obtained two epochs of spectroscopy of the candidate counterpart to J022721+333500, separated by 10 months, but discovered no radial velocity variations with a 2σ upper limit of 40 km/s. If the RSG is the donor star of the ULX, the most likely options are that either the system is seen at low inclination (

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

Journal keyword(s): infrared: stars - X-rays: individual: Holmberg II X-1 - X-rays: individual: [SST2011] J022721.52+333500.7 - X-rays: individual: [SST2011] J022727.53+333443.0 - X-rays: individual: CXOU J120922.6+295551 - X-rays: individual: [SST2011] J120922.18+295559.7

Simbad objects: 12

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Number of rows : 12
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 RX J004722.4-252051 ULX 00 47 22.59 -25 20 50.9           ~ 43 0
2 NGC 253 SyG 00 47 33.134 -25 17 19.68   8.03   6.94 8.1 ~ 3588 2
3 NGC 925 H2G 02 27 16.913 +33 34 43.97   10.69 10.12 9.55   ~ 818 1
4 [SST2011] J022721.52+333500.7 UX? 02 27 21.52 +33 35 00.8           ~ 15 0
5 [SST2011] J022727.53+333443.0 UX? 02 27 27.53 +33 34 42.9           ~ 14 0
6 UGC 4305 IG 08 19 04.9864630512 +70 43 13.086910452 12.06 11.72 11.39 11.11   ~ 812 2
7 [SST2011] J081929.00+704219.3 ULX 08 19 28.99 +70 42 19.4           ~ 213 2
8 [KCF2005] M82 G ULX 09 55 51.040 +69 40 45.49           ~ 284 1
9 NGC 4136 GiG 12 09 17.7035859024 +29 55 39.419783832   11.69       ~ 244 1
10 [SST2011] J120922.18+295559.7 ULX 12 09 22.19 +29 55 59.7           ~ 10 0
11 [LB2005] NGC 4136 ULX1 UX? 12 09 22.58 +29 55 50.6           ~ 11 0
12 IGR J16318-4848 HXB 16 31 48.3090342864 -48 49 00.665054832         16.217 B[e]I 181 0

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