2023MNRAS.519.5882S

Query : 2023MNRAS.519.5882S

2023MNRAS.519.5882S - Mon. Not. R. Astron. Soc., 519, 5882-5892 (2023/March-2)

The orbital kinematics of η Carinae over three periastra with a possible detection of the elusive secondary's motion.

STRAWN E., RICHARDSON N.D., MOFFAT A.F.J., IBRAHIM N., LANE A., PICKETT C., CHENE A.-N., CORCORAN M.F., DAMINELI A., GULL T.R., HILLIER D.J., MORRIS P., PABLO H., THOMAS J.D., STEVENS I.R., TEODORO M. and WEIGELT G.

Abstract (from CDS):

The binary η Carinae is the closest example of a very massive star, which may have formed through a merger during its Great Eruption in the mid-19th century. We aimed to confirm and improve the kinematics using a spectroscopic data set taken with the Cerro Tololo Inter-American Observatory 1.5-m telescope over the time period of 2008-2020, covering three periastron passages of the highly eccentric orbit. We measure line variability of H α and H β, where the radial velocity and orbital kinematics of the primary star were measured from the H β emission line using a bisector method. At phases away from periastron, we observed the He II 4686 emission moving opposite the primary star, consistent with a possible Wolf-Rayet companion, although with a seemingly narrow emission line. This could represent the first detection of emission from the companion.

Abstract Copyright: © 2023 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): techniques: spectroscopic - binaries: spectroscopic - stars: individual: η Carinae - stars: massive - stars: variables: S Doradus - stars: winds, outflows

Status at CDS : Large table(s) will be appraised for possible ingestion in VizieR.

Simbad objects: 18

goto Full paper

goto View the references in ADS

Number of rows : 18
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 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
2 HD 5980 WR* 00 59 26.5838833944 -72 09 53.927337312   11.13 11.31   11.029 WN4+O7I: 419 1
3 V* S Dor sg* 05 18 14.3570612088 -69 15 01.149576912 9.08 10.39 10.25 9.74 9.14 Be3 395 0
4 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
5 HD 38282 WR* 05 38 53.3783458680 -69 02 00.895545204   10.98 11.11 11.26   WN5/6h+WN6/7h 192 1
6 HD 269928 WR* 05 38 57.0667692816 -69 06 05.660419140   12.02 11.94 12.00 11.58 WN6/7 143 0
7 * gam02 Vel WR* 08 09 31.95013 -47 20 11.7108 0.64 1.58 1.83 1.85 2.00 WC8+O7.5III-V 951 0
8 HD 92740 WR* 10 41 17.5158425712 -59 40 36.895992960 5.68 6.50 6.42 7.38   WN7h+O9III-V 426 0
9 HD 93131 WR* 10 43 52.2579213120 -60 07 04.019676456 5.52 6.43 6.48 7.46   WN6ha-w 309 0
10 HD 93162 WR* 10 44 10.3890266112 -59 43 11.106500520 7.90 8.55 8.80 8.66   O2.5If*/WN6+OB 374 0
11 NAME Little Homunculus ISM 10 45 -59.7           ~ 71 2
12 NGC 3372 HII 10 45 02.23 -59 41 59.8           ~ 1071 2
13 NAME Homunculus Nebula ISM 10 45 03.5 -59 41 04           ~ 379 1
14 * eta Car s*b 10 45 03.545808 -59 41 03.95124 6.37 7.03 6.48 6.123 4.41 LBV 2543 0
15 * tet Crt PM* 11 36 40.9092052035 -09 48 08.001725582   4.604 4.673     B9.5V 226 0
16 HD 316285 s*b 17 48 14.0372119152 -28 00 53.121269592 11.88 11.27 9.60 9.28   B0Ieq 197 2
17 HD 190918 WR* 20 05 57.3244526328 +35 47 18.150756792 6.11 6.88 6.75     WN5+O9I 385 0
18 HD 193793 WR* 20 20 27.9757908696 +43 51 16.286840244 6.90 7.25 6.85 4.58   WC7pd+O5.5fc 754 0

To bookmark this query, right click on this link: simbad:objects in 2023MNRAS.519.5882S and select 'bookmark this link' or equivalent in the popup menu