{"paper":{"title":"Characterizing Earth analogs may require a moderate or high-resolution spectrograph","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"Moderate or high spectral resolution is required to detect biosignatures in Earth analog planets because low resolution allows correlated speckle noise to suppress the signals.","cross_cats":["astro-ph.EP"],"primary_cat":"astro-ph.IM","authors_text":"Beck Dacus, Bertrand Mennesson, Bruce Macintosh, Corey Spohn, Dimitri Mawet, Dmitry Savransky, Jean-Baptiste Ruffio, Ji Wang, Kielan Hoch, Laurent Pueyo, Marshall D. Perrin, Michael W. McElwain, Nicole Wolff, Pin Chen, Quinn M. Konopacky, Renyu Hu, Sarah Steiger, Shelley A. Wright, Tyler D. Robinson","submitted_at":"2026-04-19T17:47:05Z","abstract_excerpt":"A primary goal of the Habitable Worlds Observatory (HWO) is to detect and measure the abundance of biosignature molecules, such as water (H2O) and oxygen (O2), in the atmosphere of Earth analogs. This is expected to require deep spectroscopic observations lasting hundreds of hours per planet. In this context, it is essential to optimize the spectral resolution of the spectrograph to both maximize the number of planets that can be studied over the lifetime of the mission, and also to reduce the risks of false detections. The purpose of this work is to provide a framework to explore the spectral"},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"Our findings suggest that a moderate or high resolution spectrograph (R>1,000) will provide higher sensitivity to critical molecules compared to a low resolution spectroscopy mode (e.g., R~140). The correlated speckle noise may also entirely suppress our ability to detect bio-signatures at low spectral resolutions.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"The simulation toolkit assumes that template matching fully captures detection significance when accounting for spectral correlation of residual starlight, and that the chosen representative mission parameters and noise floors are sufficient to compare resolutions across the full range from R<100 to R>10,000.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"Moderate to high spectral resolution (R>1000) provides higher sensitivity for detecting key molecules like H2O and O2 in Earth analogs than low resolution (R~140), as correlated speckle noise can suppress detections at low resolutions.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"Moderate or high spectral resolution is required to detect biosignatures in Earth analog planets because low resolution allows correlated speckle noise to suppress the signals.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"9fc6e4f3d45dc47cf2232983b11fa54215461a8816fe3fed965543bc28db3223"},"source":{"id":"2604.17554","kind":"arxiv","version":2},"verdict":{"id":"4cd911a3-21cf-4cc2-89fe-edba1bc80c08","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-10T05:10:47.072986Z","strongest_claim":"Our findings suggest that a moderate or high resolution spectrograph (R>1,000) will provide higher sensitivity to critical molecules compared to a low resolution spectroscopy mode (e.g., R~140). The correlated speckle noise may also entirely suppress our ability to detect bio-signatures at low spectral resolutions.","one_line_summary":"Moderate to high spectral resolution (R>1000) provides higher sensitivity for detecting key molecules like H2O and O2 in Earth analogs than low resolution (R~140), as correlated speckle noise can suppress detections at low resolutions.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"The simulation toolkit assumes that template matching fully captures detection significance when accounting for spectral correlation of residual starlight, and that the chosen representative mission parameters and noise floors are sufficient to compare resolutions across the full range from R<100 to R>10,000.","pith_extraction_headline":"Moderate or high spectral resolution is required to detect biosignatures in Earth analog planets because low resolution allows correlated speckle noise to suppress the signals."},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2604.17554/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}