2024ApJ...972..145E

Query : 2024ApJ...972..145E

2024ApJ...972..145E - Astrophys. J., 972, 145 (2024/September-2)

The Orbit and Mass of the Cepheid AW Per.

EVANS N.R., GALLENNE A., KERVELLA P., MERAND A., MONNIER J., ANDERSON R.I., GUNTHER H.M., PROFFITT C., WINSTON E.M., PIETRZYNSKI G., GIEREN W., KURASZKIEWICZ J., ANUGU N., ROETTENBACHER R.M., LANTHERMANN C., GUTIERREZ M., SCHAEFER G., SETTERHOLM B.R., IBRAHIM N. and KRAUS S.

Abstract (from CDS):

The Cepheid AW Per is a component in a multiple system with a long-period orbit. The radial velocities of Griffin cover the 38 yr orbit well. An extensive program of interferometry with the Center for High Angular Resolution Astronomy array is reported here, from which the long-period orbit is determined. In addition, a Hubble Space Telescope high-resolution spectrum in the ultraviolet demonstrates that the companion is itself a binary with nearly equal-mass components. These data combined with a distance from Gaia provide a mass of the Cepheid (primary) of M1 = 6.79 ± 0.85 M⊙. The combined mass of the secondary is MS = 8.79 ± 0.50 M⊙. The accuracy of the mass will be improved after the fourth Gaia data release, expected in approximately two years.

Abstract Copyright: © 2024. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Cepheid variable stars - Multiple stars - Stellar masses - Stellar evolution

Simbad objects: 15

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Number of rows : 15
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 * 41 Ari ** 02 49 59.0332406 +27 15 37.826018   3.498 3.594     B8Vn 170 0
2 HD 19845 * 03 13 23.8723102200 +48 10 37.040462112   6.915 5.913     K0III 83 0
3 * psi Tau Pe* 04 07 00.4569539328 +29 00 04.709274660   5.57 5.2     F1V_(dD) 102 0
4 HD 276662 * 04 38 52.0039820640 +39 09 09.345880692   10.67 9.12     K2 14 0
5 HD 29645 PM* 04 41 50.2562060352 +38 16 48.653780880   6.56   5.6   F9IV-V 143 0
6 HD 30099 * 04 46 20.3170230360 +39 13 40.145918988   9.85 8.53     K5 12 0
7 HD 30090 ** 04 46 26.9212548 +42 20 54.817484   7.23 6.53     G3IV+F6V 66 0
8 V* AW Per cC* 04 47 46.3149227688 +36 43 22.033952832   8.46 7.51   6.200 F0+B6: 235 0
9 HD 30586 SB* 04 50 46.4315170200 +40 36 24.757855920   9.81 8.41     K0 13 0
10 HD 30825 PM* 04 52 10.5500102376 +31 09 51.008985180   7.60 6.72     G5 45 0
11 HD 280306 * 05 01 00.3291523176 +36 46 31.184437044   10.47 9.07     K5 5 0
12 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
13 V* V350 Sgr cC* 18 45 17.4968424336 -20 38 50.552766852   8.321 7.450 8.41 6.421 F8Ib/II 231 0
14 V* V1334 Cyg cC* 21 19 22.1791528656 +38 14 14.868825648   6.364 5.882     F1II+B7.0V 211 0
15 * ksi Oct Pu* 22 50 22.8139009656 -80 07 25.841844408 4.7 5.180 5.311     B6V 100 0

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