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A simultaneous analysis of the WASP, FTS and Euler photometry and CORALIE spectroscopy yields a planet of R_p = 1.22 R_J and M_p = 0.58 M_J around a slightly metal-poor solar-type host star, [Fe/H] = -0.05 \\pm 0.10, of R_{\\ast} = 0.92 R_{\\odot} and M_{\\ast} = 1.00 M_{\\odot}. WASP-25b is found to have a density of \\rho_p = 0.32 \\rho_J, a low value for a sub-Jupiter mass planet. We investigate the relationship of planetary radius to planetary equilibrium temperatur"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1009.5917","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2010-09-29T15:37:41Z","cross_cats_sorted":[],"title_canon_sha256":"2534973289d67798e23aaaf9868eebfb7d92640898d5bc90c517d42293cb16cf","abstract_canon_sha256":"156645c55c2a90420720766c2938e0e9313d76495a68eef2c6e11970c3a469b8"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:05:13.532795Z","signature_b64":"Sx4BstR3YvvBkKxmjX08sG2MjamvSu9kvrAz7zuOli30foWUMHtKcIWuZaA7wZDFDu61FLB03BP9KYu6I1w7Dg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b7213ccc443a4087e00c2ad0bb0e241581d3d02de7d2eb4cfb42edbb5f19f089","last_reissued_at":"2026-05-18T02:05:13.532302Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:05:13.532302Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"WASP-25b: a 0.6 M_J planet in the Southern hemisphere","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"A.Collier Cameron, A.H.M.J.Triaud, B.Enoch, B.Smalley, C.Hellier, D.J.A.Brown, D.Pollacco, D.Queloz, D.R.Anderson, D.Segransan, E.Simpson, F.Pepe, L.Hebb, M.Gillon, M.Lendl, N.Parley, P.F.L.Maxted, R.A.Street, R.G.West, S.Udry, T.A.Lister","submitted_at":"2010-09-29T15:37:41Z","abstract_excerpt":"We report the detection of a 0.6 M_J extrasolar planet by WASP-South, WASP-25b, transiting its solar-type host star every 3.76 days. 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