2025ApJ...988..113D

Query : 2025ApJ...988..113D

2025ApJ...988..113D - Astrophys. J., 988, 113 (2025/July-3)

Precise Age for the Binary HD 21278 in the Young α Persei Cluster.

DANNER C.A., SANDQUIST E.L., SCHAEFER G.H., BEDIN L.R., FARRINGTON C.D., LANTHERMANN C., KRAUS S., KLEMENT R., ANUGU N., MONNIER J.D., OROSZ J.A., CODRON I., GARDNER T., GUTIERREZ M., SETTERHOLM B.R., JONES J. and FLORES B.

Abstract (from CDS):

We present a study of the double-lined spectroscopic binary HD 21278 that contains one of the brightest main-sequence stars in the young α Persei open cluster. We analyzed new spectra and reanalyzed archived spectra to measure precise new radial velocity curves for the binary. We also obtained interferometric data using the CHARA Array at Mount Wilson to measure the sky positions of the two stars and the inclination of the ∼2 mas orbit. We determine that the two stars have masses of 5.381 ± 0.084M⊙ and 3.353 ± 0.064M⊙. From isochrone fits, we find the cluster's age to be 49 ± 7 Myr (using PARSEC models) or 49.5 ± 6 Myr (MIST models). Finally, we revisit the massive white dwarfs that are candidate escapees from the α Persei cluster to try to better characterize the massive end of the white dwarf initial-final mass relation. The implied progenitor masses challenge the idea that Chandrasekhar-mass white dwarfs are made by single stars with masses near 8M⊙.

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

Journal keyword(s): Spectroscopic binary stars - Long baseline interferometry - Photometry - White dwarf stars - Open star clusters - Stellar evolution

Simbad objects: 54

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Number of rows : 54
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 752 OpC 01 56 53.7 +37 45 06           ~ 712 0
2 GALEX J025843.2+502052 WD* 02 58 43.2645528696 +50 20 52.402854156           DA 13 0
3 HD 18538 * 03 00 53.5166181384 +52 21 07.302980844   6.74 6.74     B9V 55 0
4 HD 19268 * 03 08 03.8524753032 +52 12 48.632538456   6.30 6.30     B5V 69 0
5 HD 19624 * 03 11 42.9019999464 +52 09 48.464907300   6.90 6.88     B5 50 0
6 HD 19893 * 03 13 50.3335382568 +49 34 07.963078584   7.183 7.155     B9V 63 0
7 HD 20191 * 03 16 49.0957023216 +51 13 05.474595684   7.22 7.19     B9 41 0
8 * 29 Per Pu* 03 18 37.7416927200 +50 13 19.834697676 6.232 5.074 5.157     B3V 167 0
9 * 31 Per Pu* 03 19 07.6392847536 +50 05 41.889763428 4.44 4.962 5.032     B5V 146 0
10 ACO 426 ClG 03 19 47.6 +41 30 54           ~ 2508 1
11 HD 20510 * 03 20 06.2633961456 +50 58 07.540036500 8.786 7.11 7.06     B9V 48 0
12 HD 20809 * 03 23 13.1970566400 +49 12 47.774817972   5.23 5.30     B5V 150 0
13 HD 20863 * 03 23 47.3303869752 +48 36 15.892890228   7.00 6.99     B9V 73 0
14 HD 20961 * 03 24 52.0903138968 +47 54 54.443824668   7.76 7.66     B9.5V 82 0
15 HD 21071 Pu* 03 25 57.3820460520 +49 07 14.729885580 5.53 6.02 6.09     B7V 180 0
16 HD 21085 * 03 26 04.4711994432 +49 44 44.105548596   7.49 7.12     A3II 18 0
17 HD 21091 * 03 26 10.8542585328 +48 23 02.552907516   7.54 7.50     B9.5V 89 0
18 HD 21152 * 03 26 50.2521569904 +47 54 57.948341436   7.82 7.73     B9V 45 0
19 Cl Melotte 20 MGr 03 26 50.6 +48 51 48           ~ 928 0
20 HD 21181 * 03 27 05.1680623464 +48 12 19.828626120   6.817 6.842     B8.5Vn 87 0
21 HD 21238 * 03 27 38.9699168352 +49 35 59.707899024   6.90 6.93     B9V 48 0
22 HD 21279 SB* 03 27 55.7799652296 +47 44 09.350746332   7.29 7.25     B8.5V 76 0
23 HD 21278 SB* 03 28 03.0707602272 +49 03 46.325803896   4.89 4.97     B5V 220 0
24 HD 21268 * 03 28 07.1693549112 +50 56 25.267763724   9.85 8.14     K2III 16 0
25 HD 21363 * 03 28 41.1022851936 +47 22 20.436031776   9.39 8.09     K0II-III 17 0
26 HD 21362 * 03 28 52.3279117200 +49 50 54.188026800   5.513 5.572     B6Vn 131 0
27 HD 21398 Em* 03 29 07.6443385464 +48 18 10.440954900   7.38 7.37     B9V 79 0
28 * 34 Per * 03 29 22.0494961351 +49 30 32.230623601 4.01 4.610 4.735     B3V 172 0
29 HD 21455 Be* 03 29 26.2864669176 +46 56 16.318187592   6.305 6.217 7.27   B7Vne 120 0
30 HD 21551 Pu* 03 30 36.9521337744 +48 06 12.973490460 5.46 5.78 5.82     B8V 138 0
31 HD 21641 Be* 03 31 33.1364138952 +47 51 44.700443460 6.47 6.733 6.763     B8.5V 115 0
32 HD 21672 * 03 31 53.9456792880 +48 44 06.519249276   6.61 6.63     B8V 87 0
33 HD 21699 Pu* 03 32 08.6084197968 +48 01 24.528548676 4.81 5.355 5.461     B9III 220 0
34 HD 21931 * 03 34 12.9646849896 +48 37 02.908747200   7.39 7.37     B9V 88 0
35 HD 22136 V* 03 35 58.4902578816 +47 05 27.699737244   6.842 6.873     B8V 108 0
36 * psi Per Be* 03 36 29.3797327450 +48 11 33.484405927 3.60 4.17 4.23     B5Ve 431 0
37 HD 22402 * 03 38 00.1822824048 +42 34 58.236163752   6.336 6.402     B8Vn 50 0
38 Cl Melotte 22 OpC 03 46 38.0 +24 10 41           ~ 3679 0
39 HD 23383 * 03 47 32.1478965960 +55 55 19.051949424 7.763 6.063 6.082     B9Vnn 56 0
40 Gaia DR3 244003693457188608 WD* 03 56 57.9749473920 +45 01 11.635667580           DA: 13 0
41 * nu. Tau * 04 03 09.3791463041 +05 59 21.482527209   3.924 3.883     A0.5Va 138 0
42 * c Per Be* 04 08 39.6935695869 +47 42 45.038007366 3.45 4.00 4.03 3.91 3.93 B3Ve 394 0
43 * d Per bC* 04 21 33.1662438000 +46 29 55.964841936 4.31 4.757 4.812     B4IV 200 1
44 * 55 Per * 04 24 29.1553459416 +34 07 50.727850608   5.657 5.718     B8V 62 0
45 Cl Melotte 25 OpC 04 30 27.4 +16 46 43           ~ 3309 0
46 NAME AB Dor Moving Group MGr 06 38 53.4 -42 50 04           ~ 540 0
47 NGC 2516 OpC 07 58 00.5 -60 46 36           ~ 793 0
48 NGC 2632 OpC 08 39 58.4 +19 36 33           ~ 1733 0
49 NGC 2682 OpC 08 51 23.5 +11 48 54           ~ 2528 0
50 IC 2602 OpC 10 42 55.9 -64 25 22           ~ 735 0
51 NGC 3532 OpC 11 05 33.9 -58 42 13           ~ 414 0
52 Cl Melotte 111 OpC 12 11 54.9 +25 16 36           ~ 520 0
53 HD 174881 SB* 18 51 35.8920107880 +28 47 01.218828336   7.383 6.209     K1II-III 29 0
54 GALEX J222814.8+453434 WD* 22 28 14.7456559128 +45 34 34.385015928           DA 9 0

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