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For the lowest vibrational state v=0 and rotational level J=1 the ortho to para H2 ratio is only 0.16. The temperature of ortho-para thermodynamical equilibrium is T_OP=43+-3 K.\n  The large number of H2 absorption lines in the HST spectra allows to deter"},"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":"1103.2604","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2011-03-14T08:41:41Z","cross_cats_sorted":[],"title_canon_sha256":"5143354495760b882fb121629fd149b51140f6c39108eea48e65e3e09d3285b7","abstract_canon_sha256":"3f4aac6fc047dc3548f88b64884209c46bdaebf50dac25218e83c4a256be8c41"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:17:09.749522Z","signature_b64":"RtM7oTk/GUnPig8Z/HDLkwBiUCdXhx3AvZdkrALuL7TlEm/oE9epBlWNL+zok0/EBWHzvvD9VBmIAq5Ra4VODw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"45bbf4ca513f62348ca297fb2d59dbc1d63a844f820b53c138d23339dae71345","last_reissued_at":"2026-05-18T00:17:09.748804Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:17:09.748804Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Interstellar H2 toward HD 147888","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Piotr Gnacinski","submitted_at":"2011-03-14T08:41:41Z","abstract_excerpt":"The ultraviolet and far--ultraviolet spectra of HD 147888 allows to access the v=0 as well as higher vibrational levels of the ground H2 electronic level. 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