2022AJ....164...34M

Query : 2022AJ....164...34M

2022AJ....164...34M - Astron. J., 164, 34-34 (2022)

The Interferometric Binary ε Cnc in Praesepe: Precise Masses and Age.

MORALES L.M., SANDQUIST E.L., SCHAEFER G.H., FARRINGTON C.D., KLEMENT R., BEDIN L.R., LIBRALATO M., MALAVOLTA L., NARDIELLO D., OROSZ J.A., MONNIER J.D., KRAUS S., LE BOUQUIN J.-B., ANUGU N., TEN BRUMMELAAR T., DAVIES C.L., ENNIS J., GARDNER T. and LANTHERMANN C.

Abstract (from CDS):

We observe the brightest member of the Praesepe cluster, ε Cnc, to precisely measure the characteristics of the stars in this binary system, en route to a new measurement of the cluster's age. We present spectroscopic radial velocity measurements and interferometric observations of the sky-projected orbit to derive the masses, which we find to be M1/M☉ = 2.420 ± 0.008 and M2/M☉ = 2.226 ± 0.004. We place limits on the color-magnitude positions of the stars by using spectroscopic and interferometric luminosity ratios while trying to reproduce the spectral energy distribution of ε Cnc. We reexamine the cluster membership of stars at the bright end of the color-magnitude diagram using Gaia data and literature radial velocity information. The binary star data are consistent with an age of 637 ± 19 Myr, as determined from MIST model isochrones. The masses and luminosities of the stars appear to select models with the most commonly used amount of convective core overshooting.

Abstract Copyright: © 2022. The Author(s). Published by the American Astronomical Society.

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

VizieR on-line data: <Available at CDS (J/AJ/164/34): table1.dat-table30.dat>

Simbad objects: 76

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Number of rows : 76
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 * tet Cas PM* 01 11 06.1620929203 +55 08 59.638991981 4.630 4.510 4.330 4.16 4.09 A7V 210 0
2 * del Cas EB* 01 25 48.9514709 +60 14 07.022507 2.930 2.810 2.680 2.53 2.44 A5IV 273 0
3 * del02 Tau PM* 04 24 05.7614531616 +17 26 38.871301956 5.07 4.95 4.80 4.64 4.57 A2Vs 261 0
4 * kap01 Tau PM* 04 25 22.1644730361 +22 17 37.935906104   4.366 4.201     A7IV-V 198 0
5 * del03 Tau a2* 04 25 29.3847186643 +17 55 40.463442784   4.369 4.298 6.18 4.24 A2IV-Vs 429 0
6 * tet02 Tau dS* 04 28 39.7416111456 +15 52 15.148738380 3.690 3.600 3.410 5.43   A7III 459 0
7 Cl Melotte 25 OpC 04 30 27.4 +16 46 43           ~ 3309 0
8 HD 28527 dS* 04 30 33.6326139192 +16 11 38.449696416   4.975 4.764 6.52   A6IV 210 0
9 * c Tau BS? 04 38 09.4618938672 +12 30 39.013056648 4.52 4.39 4.27 4.13 4.08 A6V 207 0
10 * sig02 Tau PM* 04 39 16.5021952740 +15 55 04.711098316   4.842 4.665     A5Vn 154 0
11 HD 30210 PM* 04 46 01.7404096416 +11 42 20.112329592   5.566 5.346     Am 175 0
12 * iot Tau ** 05 03 05.7465241272 +21 35 23.860305924   4.797 4.615     A7V 189 0
13 * lam Gem PM* 07 18 05.5789195368 +16 32 25.389581244   3.674 3.559     A4IV 269 0
14 HD 70297 * 08 21 50.3393313720 +19 29 20.665558428   9.06 8.76     kA7hA9mF3(III) 25 0
15 HD 72757 * 08 35 17.7713139264 +20 33 52.546971816   8.65 8.40     F0 34 0
16 * 35 Cnc RG* 08 35 19.4461296744 +19 35 24.230563692   7.248 6.558     G0III 150 0
17 HD 72846 * 08 35 45.0718555104 +19 46 16.177501668   7.62 7.48     A2 66 0
18 Cl* NGC 2632 DPN 1 WD* 08 36 10.0232301648 +19 38 18.734394228           DA 46 0
19 HD 72942 SB* 08 36 17.4427895592 +20 20 29.417866260   7.60 7.48     A3V 90 0
20 HD 73161 * 08 37 33.8158107888 +20 00 49.218969852   8.99 8.71     F0Vn 60 0
21 HD 73174 SB* 08 37 36.9991109064 +19 43 58.510939908   7.93 7.73     kA4mF0III 100 0
22 V* BR Cnc dS* 08 37 40.7066052072 +19 31 06.306845088   8.48 8.25     F0Vn 126 0
23 HD 73210 SB* 08 37 46.7628568224 +19 16 01.991343720   6.91 6.75     A5V 104 0
24 V* CY Cnc dS* 08 38 37.8616098480 +19 59 23.094950100   8.34 8.14     F0V 104 0
25 HD 73344 PM* 08 38 45.5205370776 +23 41 09.256123104 7.520 7.440   6.5   F6V 105 0
26 HD 73397 * 08 38 46.9452160512 +19 30 03.310524828   9.34 9.06     F1V 76 0
27 HD 73430 V* 08 39 03.5858900448 +19 59 59.095465836   8.51 8.33     A9V 84 0
28 HD 73449 V* 08 39 06.1081366296 +19 40 36.533338500   7.70 7.45     A9Vn 84 0
29 V* BS Cnc dS* 08 39 09.0975243288 +19 35 32.619758244   8.78 8.59     A9V 130 0
30 HD 73533 * 08 39 33.4221715320 +20 10 10.224145056   10.39 9.06     K2V 25 0
31 * 38 Cnc dS* 08 39 42.6543233112 +19 46 42.436048548   6.88 6.66     F0IV 151 0
32 HD 73574 ** 08 39 42.7802673288 +20 05 10.405586760   9.11 8.85 8.62   A5V 91 0
33 V* BU Cnc dS* 08 39 44.6645719872 +19 16 30.772035552   7.84 7.65     A7Vn 128 0
34 EGGR 60 WD* 08 39 47.2132332384 +19 46 11.963822952   18.4 18.23 18.9   DA 48 0
35 HD 73620 * 08 39 49.5945472008 +18 20 50.744985432   9.42 9.13     F1.1 37 0
36 HD 73598 ** 08 39 50.7154795152 +19 32 26.919638988   7.53 6.60     G8III-IIIb 130 0
37 HD 73619 SB* 08 39 57.7696065768 +19 32 29.322827124   7.72 7.43     kA4mF2III 115 0
38 HD 73616 * 08 39 58.3745450064 +20 09 29.690638776   9.21 8.93     F2V 74 0
39 NGC 2632 OpC 08 39 58.4 +19 36 33           ~ 1733 0
40 * 39 Cnc * 08 40 06.4182853944 +20 00 28.034963316 8.20 7.37 6.39 5.67 5.20 G8+III-IIIb 220 0
41 * 40 Cnc BS* 08 40 11.4526327416 +19 58 16.083202980   6.62 6.61     A1V 172 0
42 LB 5959 WD* 08 40 13.3026682896 +18 43 26.373596232   18.9 18.15 18.6   DA 60 1
43 BD+20 2161 * 08 40 15.3496208088 +19 59 39.483035628   9.11 8.81     F2V 67 0
44 HD 73711 * 08 40 18.0969905712 +19 31 55.163632944   7.67 7.51     F0III 122 0
45 HD 73712 SB* 08 40 20.1451748712 +19 20 56.315955804   7.04 6.78     A9V 106 0
46 HD 73709 SB* 08 40 20.7479143752 +19 41 12.242993316   7.87 7.68     kA2hA5mF0(III-IV)(Cr) 120 0
47 HD 73710 * 08 40 22.0864518288 +19 40 11.771283936 8.290 7.410 6.390 5.70 5.21 G9III-IIIb 201 0
48 HD 73730 V* 08 40 23.4641462184 +19 50 05.895548772   8.20 7.99     F2III 90 0
49 * eps Cnc SB* 08 40 27.0100951392 +19 32 41.324313444 6.630 6.460 6.290     A5m 144 0
50 EGGR 61 WD* 08 40 28.0935005160 +19 43 34.488958224   17.6 17.66 17.7   DA 72 0
51 V* BV Cnc dS* 08 40 32.9592741000 +19 11 39.569214768   8.98 8.72     kA6hA9mF0 100 0
52 V* BN Cnc dS* 08 40 39.2340192816 +19 13 41.848124700   8.01 7.80     A9V 120 0
53 * 42 Cnc * 08 40 43.2054775320 +19 43 09.532220196 7.190 7.040 6.840     A7III 101 0
54 V* BW Cnc dS* 08 40 52.4779618920 +20 15 59.472562896   8.74 8.48     F0Vn 116 0
55 V* EP Cnc dS* 08 40 56.2946955456 +19 34 49.228381848 7.090 6.950 6.780     A6Vn 131 0
56 HD 73818 Pe* 08 40 56.9348997672 +19 56 05.476641288   8.99 9.096     kA4hF0mF1SiEu 107 0
57 HD 73854 * 08 41 10.6778615472 +19 49 46.342267284   9.37 9.03     F2IV+ 89 0
58 HD 73872 dS* 08 41 13.7739225288 +19 55 19.183268568   8.55 8.34     A5V 83 0
59 V* HI Cnc ** 08 41 18.395592 +19 15 39.56328   9.01 8.82 8.75   A7Vn 71 0
60 HD 73974 SB* 08 41 50.0792800992 +19 52 27.045440112   7.88 6.92     G8III-IIIb 121 0
61 HD 73993 V* 08 41 53.1404333112 +20 09 33.979474440   8.84 8.56     F2Vn 72 0
62 V* BX Cnc dS* 08 42 06.4971812184 +19 24 40.526879436   8.17 7.97     A7V 125 0
63 V* BY Cnc dS* 08 42 10.8071828616 +18 56 03.761716128   8.09 7.91     A7Vn 95 0
64 LB 1876 WD* 08 42 52.3105257384 +19 51 11.194802136   17.84 17.69     DA5 48 1
65 HD 74135 * 08 42 53.0640303912 +20 49 09.260000436   9.15 8.86     A9III 57 0
66 Cl* NGC 2632 DPN 4 WD* 08 42 58.0378306128 +18 54 35.394452028           DA 33 0
67 HD 74379 * 08 44 19.2146641944 +20 52 36.618175092   9.17 8.05     K0III 11 0
68 HD 74589 * 08 45 20.5287035832 +18 52 31.428465780   8.69 8.45     F0 49 0
69 HD 74587 dS* 08 45 28.2545577192 +20 23 43.403380836   9.164 8.48     A5 52 0
70 HD 74656 * 08 45 46.5355239288 +19 02 58.072363368   8.25 8.00 8.0   Am 60 0
71 LB 8648 WD* 08 46 01.9035697512 +18 30 48.545909388   18.0       DA 35 0
72 HD 74720 ** 08 46 11.7286031376 +18 10 47.031363192   8.54 8.28     A2 23 0
73 HD 74718 * 08 46 15.4648498104 +19 42 32.970668616   8.60 8.38     A5 52 0
74 HD 74740 * 08 46 28.9027188408 +22 21 07.797346056 8.530 8.430 8.200     A2 36 0
75 HD 82394 * 09 32 13.2231840888 +21 51 23.021292420   8.45 7.45     K0III 27 0
76 NGC 6791 OpC 19 20 52.8 +37 46 40   10.52 9.5     ~ 1120 0

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