{ "abstract": "We report the discovery, validation, and characterization of 44 new symbiotic stars (SySts) accreting at the lowest detectable levels (L acc ≲3 L ⊙ ). Candidates were initially selected from the Galah survey among non-pulsating M-type red giants exhibiting H α excess. Between 2021 and 2025, these targets were subjected to intensive multi-wavelength campaigns, including ground-based, high-resolution Echelle spectroscopy over 544 nights, multi-epoch flickering searches down to 1 mmag, and UV/X-ray observations with the Swift satellite. Our high-resolution spectra allowed for a detailed investigation of H α flux and line-profile variability. Crucially, the radial velocities measured for the M-giant components yielded reliable spectroscopic orbits for 22 objects and preliminary orbits for an additional eight, corroborated by binary-induced modulations in ASAS-SN photometry. Measured accretion levels vary by factors of up to 20×, emphasizing the need for high-sensitivity, long-term monitoring. Swift X-ray data exclude neutron star companions in all targets, consistent with predominance of white-dwarf degenerates in known SySts. Combined with the 33 objects from Paper I, this sample of 77 new SySts significantly exceeds the number of previously known, accreting-only Galactic symbiotic stars, constituting the bulk of the low-accretion (LowAcc) variety discovered to date and representing >10% of all known SySts in the Galaxy. As SySts likely spend most of their lifetimes in LowAcc faint states, characterizing this population is essential for estimating the total Galactic SySt population and evaluating the role of SySts as Type Ia supernova progenitors or sources of UV excess in elliptical galaxies.", "abstract_shown": true, "affiliations": [ "INAF Osservatorio Astronomico di Padova", "ANS Collaboration, c/o Astronomical Observatory", "INAF – Osservatorio di Astrofisica e Scienza dello Spazio", "Departamento de Ciencias Físicas, Universidad Andrés Bello", "Faculty of Mathematics and Physics, University of Ljubljana", "Sydney Institute for Astronomy, School of Physics, A28, The University of Sydney", "Research School of Astronomy & Astrophysics, Australian National University", "Monash Centre for Astrophysics, Monash University", "School of Physics and Astronomy, Monash University", "Australian Astronomical Optics, Faculty of Science and Engineering, Macquarie Univ.", "Macquarie University Research Centre for Astronomy, Astrophysics & Astrophotonics", "School of Mathematical and Physical Sciences, Macquarie University", "School of Physics, UNSW", "Space Telescope Science Institute", "Macquarie University Research Centre for Astrophysics and Space Technologies" ], "article_type": null, "arxiv": null, "author_total": 25, "authors": [ { "affs": [ 0 ], "name": "Ulisse Munari", "orcid": "0000-0001-6805-9664" }, { "affs": [ 0, 1 ], "name": "Paolo Valisa", "orcid": "0009-0002-1561-514X" }, { "affs": [ 2, 3 ], "name": "Nicola Masetti", "orcid": "0000-0001-9487-7740" }, { "affs": [ 0, 1 ], "name": "Massimo Fiorucci", "orcid": "0009-0007-2586-4090" }, { "affs": [ 4 ], "name": "Manica Perko", "orcid": "0000-0002-7043-8038" }, { "affs": [ 4 ], "name": "Bor Jamnik", "orcid": "0009-0008-9261-0418" }, { "affs": [ 4 ], "name": "Gregor Traven", "orcid": "0000-0002-1391-9097" }, { "affs": [ 1 ], "name": "Andrea Frigo" }, { "affs": [ 5 ], "name": "Joss Bland-Hawthorn", "orcid": "0000-0001-7516-4016" }, { "affs": [ 6 ], "name": "Sven Buder", "orcid": "0000-0002-4031-8553" }, { "affs": [ 7, 8 ], "name": "Andrew R. Casey", "orcid": "0000-0003-0174-0564" }, { "affs": [ 9, 10 ], "name": "Gayandhi M. De Silva", "orcid": "0000-0001-7362-1682" }, { "affs": [ 11 ], "name": "Pradosh B. Das", "orcid": "0009-0001-3999-3535" }, { "affs": [ 6 ], "name": "Ken C. Freeman", "orcid": "0000-0001-6280-1207" }, { "affs": [ 5 ], "name": "Michael R. Hayden" }, { "affs": [ 4 ], "name": "Janez Kos", "orcid": "0000-0003-2533-6056" }, { "affs": [ 5 ], "name": "Geraint F. Lewis", "orcid": "0000-0003-3081-9319" }, { "affs": [ 6 ], "name": "Jane Lin" }, { "affs": [ 12 ], "name": "Sarah L. Martell", "orcid": "0000-0002-3430-4163" }, { "affs": [ 6 ], "name": "Katharine J. Schlesinger" }, { "affs": [ 13 ], "name": "Sanjib Sharma" }, { "affs": [ 12 ], "name": "Jeffrey D. Simpson" }, { "affs": [ 5, 12 ], "name": "Dennis Stello", "orcid": "0000-0002-4879-3519" }, { "affs": [ 11, 14 ], "name": "Daniel B. Zucker", "orcid": "0000-0003-1124-8477" }, { "affs": [ 4 ], "name": "Tomaž Zwitter", "orcid": "0000-0002-2325-8763" } ], "bibtex": "https://research.draconitic.com/paper/f13j7b2v9p8qm.bib", "cited_by": 0, "doi": "10.1051/0004-6361/202660724", "fulltext_url": null, "id": "f13j7b2v9p8qm", "issns": [ "0004-6361", "1432-0746" ], "landing_url": "https://www.aanda.org/10.1051/0004-6361/202660724", "language": null, "licence": "CC-BY-4.0", "licence_label": "CC BY 4.0", "licence_source": "journal", "licence_url": "https://creativecommons.org/licenses/by/4.0/", "metadata_licence": null, "native_subjects": [], "openalex": null, "pdf_url": null, "pmcid": null, "pmid": null, "published": "2026-11-03", "publisher": "EDP Sciences", "ris": "https://research.draconitic.com/paper/f13j7b2v9p8qm.ris", "sources": [ { "first_seen": "2026-11-03T12:20:37Z", "native_id": "10.1051/0004-6361/202660724", "source": "crossref", "url": "https://www.aanda.org/10.1051/0004-6361/202660724" } ], "subjects": [ { "field": "astronomy", "origin": "journal-openalex:3103|Stellar, planetary, and galactic studies", "subfield": "stellar" } ], "title": "The Galah survey and symbiotic stars", "title_text": "The Galah survey and symbiotic stars", "type": "peer-reviewed", "updated_at": "2026-11-05T00:20:46Z", "url": "https://research.draconitic.com/paper/f13j7b2v9p8qm", "venue": "Astronomy & Astrophysics", "versions": [ { "doi": "10.48550/arxiv.2611.05200", "pid": "c7zrre88ddhd8", "relation": "preprint", "title": "The Galah survey and symbiotic stars. II. Discovery, validation, and intensive follow-up of 44 new systems accreting at the lowest detectable levels", "venue": "arXiv" } ] }