2025ApJ...986...96E

Query : 2025ApJ...986...96E

2025ApJ...986...96E - Astrophys. J., 986, 96 (2025/June-2)

Mass of Cepheid V350 Sgr Incorporating Interferometry and the Companion Mass.

EVANS N.R., GALLENNE A., KERVELLA P., GUNTHER H.M., KURASZKIEWICZ J., ANDERSON R.I., PROFFITT C., MERAND A., TRAHIN B., VIVIANI G. and SHETYE S.

Abstract (from CDS):

The system V350 Sgr has a classical Cepheid for the primary. Interferometry is presented for the system, and the full orbit is determined. The mass of the companion has been determined from an International Ultraviolet Explorer spectrum and comparison with the mass-temperature relation from detached eclipsing binaries. Combined with the mass of the companion (2.6 ± 0.2 M⊙), the mass of the Cepheid is determined to be 4.7 ± 0.8 M⊙. For systems with less complete information, Cepheid masses can be determined from a single-lined spectroscopic orbit, Gaia proper motion anomalies, and the mass of the companion from the ultraviolet. Uncertainties resulting from different approaches to mass determination are discussed and are expected to be reduced after the Gaia DR4 release. Temperatures for Morgan-Keenan standard stars from the ultraviolet are also provided.

Abstract Copyright: © 2025. The Author(s). Published by the American Astronomical Society.

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

Simbad objects: 27

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Number of rows : 27
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 * alf UMi cC* 02 31 49.09456 +89 15 50.7923 3.00 2.62 2.02 1.53 1.22 F8Ib 716 2
2 * 18 Tau PM* 03 45 09.7401340368 +24 50 21.343198416 5.21 5.57 5.64 5.61 5.68 B8V 293 0
3 * rho Aur SB* 05 21 48.4165451880 +41 48 16.459353360   5.070 5.207     B4V 167 0
4 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
5 * 134 Tau * 05 49 32.9303335271 +12 39 04.760685507 4.68 4.811 4.875     B9V 208 0
6 * 38 Lyn PM* 09 18 50.6435791217 +36 48 09.345084336   3.96 3.92   3.81 A1V 149 0
7 V* FN Vel cC* 09 48 41.4894764448 -55 31 10.350795792   11.24 10.25     F9II+? 61 0
8 * bet Sex a2* 10 30 17.4802898904 -00 38 13.314537996 4.43 4.96 5.10 5.13 5.27 B6V 193 0
9 * del Leo PM* 11 14 06.50142 +20 31 25.3853 2.79 2.68 2.53 2.44 2.41 A5IV(n) 292 0
10 * gam UMa Em* 11 53 49.8473166 +53 41 41.135025 2.440 2.450 2.440 2.44 2.47 A0V 417 0
11 HD 116482 * 13 24 13.7006372184 -25 58 46.443601596   10.57 9.36     K1III 7 0
12 * g UMa ** 13 25 13.5378333 +54 59 16.654781 4.260 4.180 4.010 3.85 3.78 A5V+M3-4V 318 0
13 * del UMi PM* 17 32 12.9982131368 +86 35 11.254580071   4.367 4.336     A1Van 127 0
14 HD 171960 * 18 38 26.5292419080 -23 06 10.704698424   8.98 7.29     K3III 21 0
15 HD 172051 ** 18 38 53.4010594968 -21 03 06.750986472   6.518 5.860     G6V 219 1
16 HD 172034 * 18 38 55.5282646344 -22 56 28.764034188   9.57 8.47     K0III 9 0
17 HD 172545 * 18 41 36.2989972296 -17 59 16.010278872   9.78 8.64     K2(III) 20 0
18 HD 173228 * 18 45 02.6567244240 -21 31 42.434645916   10.216 8.89     K1III 11 0
19 V* V350 Sgr cC* 18 45 17.4968424336 -20 38 50.552766852   8.321 7.450 8.41 6.421 F8Ib/II 231 0
20 HD 174134 * 18 49 46.7312026536 -20 00 38.407337820   9.56 8.49     G8III 14 0
21 HD 174423 * 18 51 07.7346671640 -19 36 57.706157736   9.27 8.14     K0III 8 0
22 HD 174560 * 18 51 51.4702759128 -21 31 29.998910712   10.77 9.25     K2III 6 0
23 HD 174774 * 18 52 56.0438427792 -18 15 33.084691488   9.26 7.56     K4III 16 0
24 V* SU Cyg cC* 19 44 48.7341456312 +29 15 52.895535048 7.10 6.88 6.44 6.06 5.84 F2Iab:+B8.0V 312 0
25 * nu. Cap * 20 20 39.8157949497 -12 45 32.690284207 4.61 4.72 4.76 4.75 4.81 B9IV 279 0
26 V* V1334 Cyg cC* 21 19 22.1791528656 +38 14 14.868825648   6.364 5.882     F1II+B7.0V 211 0
27 * alf PsA PM* 22 57 39.04625 -29 37 20.0533 1.31 1.25 1.16 1.11 1.09 A4V 1303 3

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