J/AJ/168/177ivo://CDS.VizieR/J/AJ/168/177doi:10.26093/cds/vizier.51680177CDSCilley R.King G.W.Corrales L.2025-08-11T20:12:53Z2025-06-02T13:33:12ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frexoplanetsspace-observatoriesobservational-astronomyx-ray-sourcesphotometryDetecting exoplanet transits at X-ray wavelengths would provide a window into the effects of high-energy irradiation on the upper atmospheres of planets. However, stars are relatively dim in the X-ray, making exoplanet transit detections difficult with current X-ray telescopes. To date, only one exoplanet (HD 189733 b) has an X-ray transit detection. In this study, we investigate the capability of future X-ray observatories to detect more exoplanet transits, focusing on both the NewAthena Wide Field Imager instrument and the proposed Advanced X-ray Imaging Satellite (AXIS), which provide more light-collecting power than current instruments. We examined all the transiting exoplanet systems in the NASA Exoplanet Archive and gathered X-ray flux measurements or estimates for each host star. We then predicted the stellar count rates for both AXIS and NewAthena and simulated light curves, using null-hypothesis testing to identify the top 15 transiting planets ranked by potential detection significance. We also evaluate transit detection probabilities when the apparent X-ray radius is enlarged due to atmospheric escape, finding that >=five of these planetary systems may be detectable on the >4{sigma} level in this scenario. Finally, we note that the assumed host star coronal temperature, which affects the shape of an X-ray transit, can also significantly affect our ability to detect the planet.2024AJ....168..177Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/168/177CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/chandra : The Chandra Archive Log (CXC, 1999-2014)B/xmm : XMM-Newton Observation Log (XMM-Newton Science Operation Center, 2012-)IX/11 : ROSAT Source Catalog (Voges+ 1994)IX/59 : XMM-N Serendipitous Source Catalogue 4XMM-DR9 (Webb+, 2020)I/357 : Gaia DR3 Part 3. Non-single stars (Gaia Collaboration, 2022)IX/65 : XMM-Newton Serendipitous Source Cat. 4XMM-DR11 (Webb+, 2022)IX/63 : XMM-Newton Serendipitous Source Cat. 4XMM-DR10 (Webb+, 2022)IX/69 : XMM-Newton Serendipitous Source Cat. 4XMM-DR13 (Webb+, 2023)IX/68 : XMM-Newton Serendipitous Source Cat. 4XMM-DR12 (Webb+, 2023)J/A+AS/135/319 : ROSAT data of Nearby Stars (Huensch+ 1999)J/A+A/397/147 : Activity-rotation relationship in stars (Pizzolato+ 2003)J/ApJ/743/48 : Stars with rotation periods & X-ray L (Wright+, 2011)J/MNRAS/422/2024 : X-ray-age relation & exoplanet evaporation (Jackson+, 2012)J/MNRAS/463/1844 : M dwarfs rotation-activity relation (Stelzer+, 2016)J/ApJS/224/40 : Catalog of Chandra ACIS point like sources (Wang+, 2016)J/AJ/154/109 : CKS. III. Planet radii (Fulton+, 2017)J/AJ/153/136 : Planets & their host stars: Gaia parallaxes (Stassun+, 2017)J/AJ/156/264 : CKS. VII. Planet radius gap (Fulton+, 2018)J/ApJ/875/29 : Spectroscopic analysis of CKS sample. I. (Martinez+, 2019)J/A+A/623/A57 : WASP-121 b Swift UVOT near-UV transit obs (Salz+, 2019)J/AJ/159/100 : Flux & RVs of the dwarf G9-40: K2 & HPF (Stefansson+, 2020)J/A+A/650/A66 : DS Tuc A radial velocity curve (Benatti+, 2021)J/AJ/164/110 : HST/COS far-UV spec AU Microscopii flares (Feinstein+, 2022)J/A+A/661/A23 : Exoplanet X-ray evaporation rates (Foster+, 2022)J/A+A/661/A29 : First eROSITA study of nearby M dwarfs (Magaudda+, 2022)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/168/177https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/168/177http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/168/177https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/168/177https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/168/177http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/168/177GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/168/177/table1 (X-ray information and sources table)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/168/177/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/168/177/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/168/177/table1?GETtext/xml+votable180.050000true133.149213128.33082080.0055555555555555566/215 267 328 353 368 449 1032 1036 1052 1064 1585 1793 2715 2740 2864 2953 3249 3801 3828 3876 3994 4629 4651 4698 4716 4720 4867 5009 5186 5657 6017 6181 6217 7186 7240 7487 7652 7777 7934 9373 9459 9811 9960 9979 10028 10491 10593 11087 11510 11588 11908 11918 12195 12242 12260 12270 12644 12983 13143 13269 13569 14278 14585-14586 14591 14608 14750 14762 14768 14794 14825 14896 14931 14935 14965 14968 15104 15110 15121 15126 15145-15146 15153 15629 15973 16014 16094 16258 16347 16395 16432 16472 16551 16722 16847 16971 17089 18029 18147 18329 18434 18451 18491 18585 18632 18726 18785-18786 18800 18943 19791 20186 20453 20667 21137 21206 21820 21935 21986 22351 22661 22886 23531 23867 24202 24223 24256 24340 24527 24587 25427 25463 25723 26256 26538 26727 26768 26771 26969 26977 27358 27393 27401 27787 28400 28548 30009 31216 32659 32730 32749 32811 32833 32848 32918 33148 33210 33212 33449 33598 33733 33875 33972 33989 34005 34423 34452 34471 34561 34986 35057 35922 35985 36015 36196 36643 36794 37313 37453 37547-37548 37578 37947 38067 38376 38408 38456 38464 38480 38946 39080 39148 39542 39733 40220 40250 40347 40772 40833 40968 41484 41786 41941 43029 43437 43442 43525 43544 43631 43656 44159 44272 44378 44431 44451 44463 44512 45161 45382 45527 45553 45890 46128 46135 46429 46462 47125 47194 47488 47717 48068 48098 48274 49103https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/168/177?format=asciiX-raydefaultJ/AJ/168/177/table1X-ray information and sources tablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameName of planet host starmeta.id;meta.maincharDist[6/1080] Distance to systempcpos.distancedoubler_DistDistance source (1)meta.bib.bibcode;pos.distancecharLx[3.8e+25/6.4e+30] 0.2-2.4keV X-ray luminosity in erg/s1e-07Wphys.luminosity;em.X-ray.softdoubleFx[5.0e-17/4.3e-11] 0.2-2.4keV X-ray unabsorbed flux in erg/s/cm^2^mW.m**-2phot.flux;em.X-ray.softdoubler_LxX-ray luminosity source, ADS bibcode or descriptionmeta.bib;phys.luminosity;em.X-ray.softcharFlag? Estimation flag (2)meta.code.errorintnullable_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainSimbadNameSimbad column added by the CDSmeta.idcharnullable