2024MNRAS.528.5703S

Query : 2024MNRAS.528.5703S

2024MNRAS.528.5703S - Mon. Not. R. Astron. Soc., 528, 5703-5722 (2024/March-2)

The EBLM Project- XI. Mass, radius, and effective temperature measurements for 23 M-dwarf companions to solar-type stars observed with CHEOPS.

SWAYNE M.I., MAXTED P.F.L., TRIAUD A.H.M.J., SOUSA S.G., DELINE A., EHRENREICH D., HOYER S., OLOFSSON G., BOISSE I., DUCK A., GILL S., MARTIN D., McCORMAC J., PERSSON C.M., SANTERNE A., SEBASTIAN D., STANDING M.R., ACUNA L., ALIBERT Y., ALONSO R., ANGLADA G., BARCZY T., BARRADO NAVASCUES D., BARROS S.C.C., BAUMJOHANN W., BAYCROFT T.A., BECK M., BECK T., BENZ W., BILLOT N., BONFILS X., BORSATO L., BOURRIER V., BRANDEKER A., BROEG C., CARMONA A., CHARNOZ S., COLLIER CAMERON A., CORTES-ZULETA P., CSIZMADIA S., CUBILLOS P.E., DAVIES M.B., DELEUIL M., DELFOSSE X., DELREZ L., DEMANGEON O.D.S., DEMORY B.-O., DRANSFIELD G., ERIKSON A., FORTIER A., FORVEILLE T., FOSSATI L., FRIDLUND M., GANDOLFI D., GILLON M., GUDEL M., GUNTHER M.N., HARA N., HEBRARD G., HEIDARI N., HELLIER C., HELLING C., ISAAK K.G., KERSCHBAUM F., KIEFER F., KISS L.L., KUNOVAC V., LALITHA S., LAM K.W.F., LASKAR J., LECAVELIER DES ETANGS A., LENDL M., MAGRIN D., MARAFATTO L., MARTIOLI E., MILLER N.J., MORDASINI C., MOUTOU C., NASCIMBENI V., OTTENSAMER R., PAGANO I., PALLE E., PETER G., PIAZZA D., PIOTTO G., POLLACCO D., QUELOZ D., RAGAZZONI R., RANDO N., RAUER H., RIBAS I., SANTOS N.C., SCANDARIATO G., SEGRANSAN D., SIMON A.E., SMITH A.M.S., SOUTHWORTH R., STALPORT M., SZABO G.M., THOMAS N., UDRY S., ULMER B., VAN GROOTEL V., VENTURINI J., WALTON N.A., WILLETT E. and WILSON T.G.

Abstract (from CDS):

Observations of low-mass stars have frequently shown a disagreement between observed stellar radii and radii predicted by theoretical stellar structure models. This 'radius inflation' problem could have an impact on both stellar and exoplanetary science. We present the final results of our observation programme with the CHaracterising ExOPlanet Satellite (CHEOPS) to obtain high-precision light curves of eclipsing binaries with low-mass stellar companions (EBLMs). Combined with the spectroscopic orbits of the solar-type companions, we can derive the masses, radii, and effective temperatures of 23 M-dwarf stars. We use the PYCHEOPS data analysis software to analyse their primary and secondary occultations. For all but one target, we also perform analyses with Transiting Exoplanet Survey Satellite (TESS) light curves for comparison. We have assessed the impact of starspot-induced variation on our derived parameters and account for this in our radius and effective temperature uncertainties using simulated light curves. We observe trends in inflation with both metallicity and orbital separation. We also observe a strong trend in the difference between theoretical and observational effective temperatures with metallicity. There is no such trend with orbital separation. These results are not consistent with the idea that the observed inflation in stellar radius combines with lower effective temperature to preserve the luminosity predicted by low-mass stellar models. Our EBLM systems provide high-quality and homogeneous measurements that can be used in further studies of radius inflation.

Abstract Copyright: © 2024 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society.

Journal keyword(s): techniques: photometric - techniques: spectroscopic - binaries: eclipsing - stars: fundamental parameters - stars: low-mass

VizieR on-line data: <Available at CDS (J/MNRAS/528/5703): stars.dat lc/* list.dat fits/*>

Simbad objects: 24

goto Full paper

goto View the references in ADS

Number of rows : 24
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 TYC 5850-383-1 SB* 00 57 58.9513215384 -19 49 47.465388336   12.44 11.65     ~ 7 0
2 TYC 2291-1627-1 EB* 01 13 51.2969940264 +31 49 09.757524180   10.61 10.11     G0V+M 27 0
3 TYC 2813-1290-1 SB* 01 23 24.1224114600 +38 18 33.895257804   13.06 12.67     G3 7 0
4 BD-20 499 SB* 02 39 29.2866721416 -20 02 23.987131656   11.34 10.63     ~ 5 0
5 TYC 5921-745-1 SB* 05 40 43.5839917488 -17 32 44.814245640   12.19 11.31     ~ 10 0
6 EBLM J0546-18 SB* 05 46 04.8071516736 -18 17 54.570440184           ~ 4 0
7 TYC 1913-843-1 SB* 07 19 14.2637633856 +25 25 30.784027728   11.64 10.96     ~ 7 0
8 TYC 7167-584-1 SB* 09 41 16.7628253152 -31 49 10.305656076   11.62 11.08     ~ 8 0
9 UCAC4 251-040381 SB* 09 55 18.2771576904 -39 52 58.963573416   13.399 12.878 12.779   ~ 5 0
10 1SWASP J101350.84+015928.1 SB* 10 13 50.8314491832 +01 59 28.227909696   12.05 11.87     ~ 17 0
11 CD-30 10313 SB* 13 05 05.7950112720 -31 26 12.198838992   12.729 12.067 12.050   ~ 10 0
12 TYC 3058-1423-1 SB* 15 22 55.3899964392 +42 45 31.884197940   12.33 11.66     G3 7 0
13 BD-05 4208 SB* 15 59 19.8685468440 -05 33 38.246360580   10.31 9.69     F5 20 0
14 TYC 2606-1838-1 SB* 17 41 21.2705996376 +31 24 55.245067560   12.11 11.70     F7 7 0
15 TYC 7931-842-1 SB* 19 28 58.8491452272 -38 08 27.227663556   12.11 11.20     ~ 7 0
16 UCAC2 13875304 SB* 19 34 25.6914014040 -42 23 11.978701836   13.38 12.62 12.57 11.82 ~ 11 0
17 BD+47 2936 EB* 19 50 50.2472976936 +48 04 51.101390496       8.8   K4V 359 1
18 TYC 7971-207-1 SB* 20 40 41.5649135232 -41 31 59.999090088   12.24 11.49     ~ 7 0
19 TYC 7967-574-1 SB* 20 46 38.0868204960 -40 32 19.221502668   12.27 11.49     ~ 4 0
20 TYC 524-2528-1 SB* 20 46 43.8759722040 +06 18 09.706470732   10.48 9.86     ~ 10 0
21 TYC 1672-1021-1 SB* 21 34 34.2027766968 +19 33 49.514670468   12.34 11.85     ~ 2 0
22 TYC 2236-617-1 SB* 23 15 33.5579643216 +23 26 37.585155552   12.25 11.56     ~ 6 0
23 BD+29 4980 SB* 23 43 18.4165031376 +29 55 56.623055412   11.54 10.53 10.31   ~ 15 0
24 TYC 3245-77-1 SB* 23 59 29.7360100512 +44 40 31.211178132   11.10 10.59     F5 9 1

To bookmark this query, right click on this link: simbad:objects in 2024MNRAS.528.5703S and select 'bookmark this link' or equivalent in the popup menu