2026AJ....171..120W

Query : 2026AJ....171..120W

2026AJ....171..120W - Astron. J., 171, 120 (2026/March-0)

The MUSCLES Extension for Atmospheric Transmission Spectroscopy: Spectral Energy Distributions for 20 Exoplanet Host Stars that JWST Observed in Cycle 1.

WILSON D.J., YOUNGBLOOD A., DUVVURI G.M., FRANCE K., SCHNEIDER P.C., BROWN A., LONGO I., FRONING C.S., BEAN J.L., PINEDA J.S., KEMPTON E.M.-R., MIGUEL Y., EVANS-SOMA T.M. and BERTA-THOMPSON Z.

Abstract (from CDS):

Correctly interpreting JWST spectra of close-in exoplanets requires a measurement of the X-ray and ultraviolet light that the planets receive from their host stars. Here, we provide spectral energy distributions (SEDs) covering the range ≈5-1 × 107 Å for 20 transiting exoplanet host stars observed in JWST Cycle 1. The SEDs are constructed out of new and archival Hubble Space Telescope, Chandra X-ray Observatory, and/or XMM-Newton data combined with spectra from models or stars with similar properties (proxies) filling in unobserved gaps. We have also constructed SEDs of likely Habitable Worlds Observatory targets κ1 Ceti, τ Ceti, ϵ Indi, and 70 Oph B for use as proxies. We find that the JWST target planets almost all experience much stronger ultraviolet fluxes than the Earth, especially in the extreme ultraviolet, even for planets with similar overall instellation. Strong ongoing or past atmospheric escape is possible for a majority of these planets. We also assess the now considerable sample of panchromatic stellar SEDs and its applicability for current JWST observations and beyond.

Abstract Copyright: © 2026. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): M dwarf stars - K dwarf stars - G dwarf stars - F dwarf stars - Exoplanets - X-ray astronomy - Ultraviolet astronomy - Exoplanet atmospheres

Simbad objects: 50

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Number of rows : 50
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 BD-10 47 MS* 00 19 05.5623884247 -09 57 53.468670700 12.434 11.246 9.897 9.061 8.311 M0V 78 0
2 WT 2353 PM* 00 29 12.3029193648 -30 27 13.466857032   13.05 11.95     ~ 102 0
3 * tau Cet PM* 01 44 04.0831371922 -15 56 14.927607677 4.43 4.22 3.50 2.88 2.41 G8V 1354 1
4 HD 15337 PM* 02 27 28.3781273256 -27 38 06.736755624   9.95 9.09     K1V 122 0
5 BD-17 588A PM* 03 01 51.3936681048 -16 35 36.031178525 13.444 12.191 10.529 9.364 7.887 M3V 113 0
6 * kap01 Cet BY* 03 19 21.6964175772 +03 22 12.714979884 5.71 5.52 4.85 4.27 3.91 G5V 948 0
7 BD-14 1137 PM* 05 27 24.8258862552 -14 16 37.046186364   10.73 9.93     G9V 44 0
8 NGTS-10 ** 06 07 29.337600 -25 35 41.67600   15.28 14.34 14.20   ~ 16 0
9 CD-38 2551 * 06 17 20.7484979472 -38 19 23.754062640   11.74 11.15     G8 49 1
10 CD-38 3220 * 07 10 24.0604565856 -39 05 50.571250476   11.00 10.51     F6V 145 0
11 CD-38 3220b Pl 07 10 24.0604565856 -39 05 50.571250476           ~ 421 0
12 * alf CMi SB* 07 39 18.11950 +05 13 29.9552 0.82 0.79 0.37 -0.05 -0.28 F5IV-V+DQZ 1925 0
13 HD 304636 PM* 09 21 37.6015398425 -60 16 55.030018583 12.145 10.955 9.465 8.517 7.511 M0V 96 0
14 HD 304636b Pl 09 21 37.6015398425 -60 16 55.030018583           ~ 10 0
15 HD 80606 PM* 09 22 37.5768032712 +50 36 13.435326684   9.78 9.00     G8V 366 2
16 BD-20 2976 PM* 09 39 30.0861120120 -20 58 56.881266564   9.94 9.35     F9V 40 0
17 CD-45 5378 PM* 09 44 29.8367689785 -45 46 35.427639685 12.278 11.372 9.979 9.019 7.829 M1V 134 0
18 * 20 LMi B PM* 10 00 50.2251808863 +31 55 45.199255664   17.1   16.349   M6.0V 45 0
19 V* DS Leo BY* 11 02 38.3420210088 +21 58 01.700013360 12.246 11.049 9.572 8.638 7.634 M1.0Ve 269 0
20 K2-18 PM* 11 30 14.5177445592 +07 35 18.255348492   15.01 13.50 13.24   dM2.5 153 0
21 K2-18b Pl 11 30 14.5177445592 +07 35 18.255348492           ~ 303 0
22 LP 961-53 PM* 11 54 18.3921193416 -37 33 09.837719244     11.536 11.104   M1 47 0
23 NAME LP 961-53b Pl 11 54 18.3921193416 -37 33 09.837719244           ~ 47 0
24 V* EG UMa CV* 12 15 44.0979312096 +52 31 01.289011692   13.0 13.230 13.149   DA+dM 119 1
25 Wolf 437 PM* 12 47 56.6245693190 +09 45 05.035666747 14.088 12.958 11.395 10.235 8.707 M3.5V 213 0
26 HD 120411 * 13 50 06.2797027704 -40 50 08.881076364   10.45 9.80     G0V 78 0
27 HD 120411b Pl 13 50 06.2797027704 -40 50 08.881076364           ~ 60 0
28 WASP-39b Pl 14 29 18.4151689656 -03 26 40.204480380           ~ 345 1
29 CD-23 12010 PM* 15 00 19.3983970152 -24 27 14.693874372   11.15 9.937 9.843   K7V 53 0
30 CD-23 12010b Pl 15 00 19.3983970152 -24 27 14.693874372           ~ 32 0
31 HD 133112 PM* 15 02 44.8678907928 -03 01 52.986571896   6.788 6.618     A4/5IV/V 86 0
32 HD 134004 * 15 09 04.8933581184 -42 42 17.789374620   10.05 9.95     A1V 37 0
33 BD+25 3173 PM* 16 58 08.8496107083 +25 44 38.974052855 12.342 11.139 9.655 8.685 7.602 M2V 273 1
34 CD-46 11540 LM* 17 28 39.9455781571 -46 53 42.688095874 12.177 10.973 9.407 8.337 7.006 M3V 300 1
35 CD-51 10924 PM* 17 30 11.2044753442 -51 38 13.130309109 12.317 11.028 9.585 8.675 8.60 M0V 142 1
36 * 70 Oph A SB* 18 05 27.2484131991 +02 30 00.526614953       3.6   K0V 252 0
37 * 70 Oph SB* 18 05 27.28518 +02 30 00.3558 5.40 4.89 4.03 3.38 2.92 K0-V 679 0
38 * 70 Oph B PM* 18 05 27.4629361936 +02 29 56.209188639   7.26 6.07 5.6   K4V 135 0
39 L 22-69 PM* 19 20 54.3761245172 -82 33 16.167893610   14.4 12.69 11.51 10.00 M3.5V 51 0
40 HD 185603 * 19 38 38.7352230144 +31 13 09.217127532   7.67 7.58     A0 80 0
41 Kepler-51 Er* 19 45 55.1428629456 +49 56 15.650520684       14.829   G4 165 1
42 HD 195689 SB* 20 31 26.3534153736 +39 56 19.773037500   7.59 7.56     A0 151 0
43 HD 204961 PM* 21 33 33.9751191976 -49 00 32.399427028 11.359 10.176 8.672 7.665 6.479 M1.5V 336 1
44 * eps Ind PM* 22 03 21.6536261624 -56 47 09.522795714   5.75 4.69     K5V 616 0
45 HATS-72 PM* 22 36 06.3189546696 -16 59 59.788096584   13.572 12.469 12.147   ~ 14 0
46 CD-60 8051 PM* 23 20 07.5245143451 -60 03 54.644648069   12.45 11.02 10.584   M2V 69 0
47 CD-60 8051b Pl 23 20 07.5245143451 -60 03 54.644648069           ~ 67 0
48 StKM 1-2122 PM* 23 23 39.9709098120 -01 11 21.448681332   12.14 11.45     K7V 61 0
49 K2-141b Pl 23 23 39.9709098120 -01 11 21.448681332           ~ 104 0
50 NAME Local Bubble ISM ~ ~           ~ 1059 0

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