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Peer-reviewedCC BY 4.0Monthly Notices of the Royal Astronomical Society

1000 cataclysmic variables identified from DESI spectroscopy

  • K Inight1
  • B T Gänsicke1
  • A Aungwerojwit2
  • P Izquierdo1
  • C J Manser1
  • A D Myers3
  • A Swan1
  • J R Thorstensen4
  • J Aguilar5
  • S Ahlen6
  • D Bianchi7,8
  • D Brooks9
32 more authors
  • T Claybaugh5
  • A de la Macorra10
  • Biprateep Dey11,12
  • P Doel9
  • A Font-Ribera13,14
  • J E Forero-Romero15,16
  • Satya Gontcho A Gontcho17
  • G Gutierrez18
  • J Guy5
  • R Joyce19
  • S Juneau19
  • S E Koposov20,21
  • A Kremin5
  • M Landriau5
  • L Le Guillou22
  • A Meisner19
  • R Miquel13,14
  • J Moustakas23
  • J Najita19
  • I Pérez-Ràfols24
  • W J Percival25,26,27
  • F Prada28
  • G Rossi29
  • E Sanchez30
  • D Schlegel5
  • M Schubnell31,32
  • H Seo33
  • J Silber5
  • G Tarlé32
  • B A Weaver19
  • R Zhou5
  • H Zou34
34 affiliations
  1. 1University of Warwick Department of Physics, , Gibbet Hill Road, Coventry, CV4 7AL ,
  2. 2Faculty of Science, Naresuan University Department of Physics, , Phitsanulok 65000 ,
  3. 3and Astronomy, University of Wyoming Department of Physics, , 1000 E. University, Dept. 3905, Laramie, WY 82071 ,
  4. 4Dartmouth College Department of Physics and Astronomy, , Hanover NH 03755 ,
  5. 5Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720 ,
  6. 6Boston University Department of Physics, , 590 Commonwealth Avenue, Boston, MA 02215
  7. 7Università degli Studi di Milano Dipartimento di Fisica “Aldo Pontremoli”, , Via Celoria 16, I-20133 Milano ,
  8. 8INAF-Osservatorio Astronomico di Brera , Via Brera 28, 20122 Milano ,
  9. 9University College London Department of Physics & Astronomy, , Gower Street, London, WC1E 6BT ,
  10. 10Instituto de Física, Universidad Nacional Autónoma de México, Circuito de la Investigación Científica , Ciudad Universitaria, Cd. de México C. P. 04510 ,
  11. 11University of Toronto Department of Astronomy & Astrophysics, , Toronto, ON M5S 3H4 ,
  12. 12Astrophysics, and Cosmology Center (PITT PACC), University of Pittsburgh Department of Physics & Astronomy and Pittsburgh Particle Physics, , 3941 O’Hara Street, Pittsburgh, PA 15260 ,
  13. 13Institució Catalana de Recerca i Estudis Avançats , Passeig de Lluís Companys, 23, 08010 Barcelona ,
  14. 14Institut de Física d’Altes Energies (IFAE), The Barcelona Institute of Science and Technology , Edifici Cn, Campus UAB, 08193, Bellaterra (Barcelona) ,
  15. 15Universidad de los Andes Departamento de Física, , Cra. 1 No. 18A-10, Edificio Ip, CP 111711, Bogotá ,
  16. 16Observatorio Astronómico, Universidad de los Andes , Cra. 1 No. 18A-10, Edificio H, CP 111711 Bogotá ,
  17. 17University of Virginia , Department of Astronomy, Charlottesville, VA 22904 ,
  18. 18Fermi National Accelerator Laboratory , PO Box 500, Batavia, IL 60510 ,
  19. 19NSF NOIRLab , 950 N. Cherry Ave., Tucson, AZ 85719 ,
  20. 20Institute for Astronomy, University of Edinburgh , Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ ,
  21. 21Institute of Astronomy, University of Cambridge , Madingley Road, Cambridge CB3 0HA ,
  22. 22Sorbonne Université, CNRS/IN2P3, Laboratoire de Physique Nucléaire et de Hautes Energies (LPNHE) , FR-75005 Paris ,
  23. 23Siena University Department of Physics and Astronomy, , 515 Loudon Road, Loudonville, NY 12211 ,
  24. 24Universitat Politècnica de Catalunya Departament de Física, EEBE, , c/Eduard Maristany 10, 08930 Barcelona ,
  25. 25University of Waterloo Department of Physics and Astronomy, , 200 University Ave W, Waterloo, ON N2L 3G1 ,
  26. 26Perimeter Institute for Theoretical Physics , 31 Caroline St. North, Waterloo, ON N2L 2Y5 ,
  27. 27Waterloo Centre for Astrophysics, University of Waterloo , 200 University Ave W, Waterloo, ON N2L 3G1 ,
  28. 28Instituto de Astrofísica de Andalucía (CSIC) , Glorieta de la Astronomía, s/n, E-18008 Granada ,
  29. 29Sejong University Department of Physics and Astronomy, , 209 Neungdong-ro, Gwangjin-gu, Seoul 05006 ,
  30. 30CIEMAT , Avenida Complutense 40, E-28040 Madrid ,
  31. 31University of Michigan Department of Physics, , 450 Church Street, Ann Arbor, MI 48109 ,
  32. 32University of Michigan , 500 S. State Street, Ann Arbor, MI 48109 ,
  33. 33Ohio University Department of Physics & Astronomy, , 139 University Terrace, Athens, OH 45701 ,
  34. 34National Astronomical Observatories, Chinese Academy of Sciences, A20 Datun Road, Chaoyang District , Beijing, 100101 ,
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Abstract

Most cataclysmic variables (CVs) are discovered when they have an outburst generating an inherent selection bias against CVs that rarely, or never, outburst. CVs discovered by virtue of their spectroscopic characteristics are particularly valuable to offset this bias and we have used an established machine-learning technique to assist in searching 98 966 000 spectra obtained by the Dark Energy Spectroscopic Survey (DESI) to find such CVs. DESI observations are much deeper than previous spectroscopic surveys and we have identified 1028 CVs, 221 of which are new including ten of the AMCVn subtype. We have spectroscopically confirmed 440 CV candidates and obtained 85 new or improved orbital periods.We present revised space density estimates based upon this new data. We have also added ten more to the eight known examples of an intriguing class of CVs which exhibit peculiar changes in accretion.

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Cite

BibTeXRIS
BibTeX
@article{inight20261000,
  title = {{1000 cataclysmic variables identified from DESI spectroscopy}},
  author = {K Inight and B T Gänsicke and A Aungwerojwit and P Izquierdo and C J Manser and A D Myers and A Swan and J R Thorstensen and J Aguilar and S Ahlen and D Bianchi and D Brooks and T Claybaugh and A de la Macorra and Biprateep Dey and P Doel and A Font-Ribera and J E Forero-Romero and Satya Gontcho A Gontcho and G Gutierrez and J Guy and R Joyce and S Juneau and S E Koposov and A Kremin and M Landriau and L Le Guillou and A Meisner and R Miquel and J Moustakas and J Najita and I Pérez-Ràfols and W J Percival and F Prada and G Rossi and E Sanchez and D Schlegel and M Schubnell and H Seo and J Silber and G Tarlé and B A Weaver and R Zhou and H Zou},
  journal = {Monthly Notices of the Royal Astronomical Society},
  year = {2026},
  month = oct,
  doi = {10.1093/mnras/stag2061},
  url = {https://academic.oup.com/mnras/advance-article/doi/10.1093/mnras/stag2061/9004106},
  note = {CC BY 4.0},
}
RIS
TY  - JOUR
TI  - 1000 cataclysmic variables identified from DESI spectroscopy
AU  - K Inight
AU  - B T Gänsicke
AU  - A Aungwerojwit
AU  - P Izquierdo
AU  - C J Manser
AU  - A D Myers
AU  - A Swan
AU  - J R Thorstensen
AU  - J Aguilar
AU  - S Ahlen
AU  - D Bianchi
AU  - D Brooks
AU  - T Claybaugh
AU  - A de la Macorra
AU  - Biprateep Dey
AU  - P Doel
AU  - A Font-Ribera
AU  - J E Forero-Romero
AU  - Satya Gontcho A Gontcho
AU  - G Gutierrez
AU  - J Guy
AU  - R Joyce
AU  - S Juneau
AU  - S E Koposov
AU  - A Kremin
AU  - M Landriau
AU  - L Le Guillou
AU  - A Meisner
AU  - R Miquel
AU  - J Moustakas
AU  - J Najita
AU  - I Pérez-Ràfols
AU  - W J Percival
AU  - F Prada
AU  - G Rossi
AU  - E Sanchez
AU  - D Schlegel
AU  - M Schubnell
AU  - H Seo
AU  - J Silber
AU  - G Tarlé
AU  - B A Weaver
AU  - R Zhou
AU  - H Zou
PY  - 2026
DA  - 2026/10/28
JO  - Monthly Notices of the Royal Astronomical Society
DO  - 10.1093/mnras/stag2061
UR  - https://academic.oup.com/mnras/advance-article/doi/10.1093/mnras/stag2061/9004106
AB  - Most cataclysmic variables (CVs) are discovered when they have an outburst generating an inherent selection bias against CVs that rarely, or never, outburst. CVs discovered by virtue of their spectroscopic characteristics are particularly valuable to offset this bias and we have used an established machine-learning technique to assist in searching 98 966 000 spectra obtained by the Dark Energy Spectroscopic Survey (DESI) to find such CVs. DESI observations are much deeper than previous spectroscopic surveys and we have identified 1028 CVs, 221 of which are new including ten of the AMCVn subtype. We have spectroscopically confirmed 440 CV candidates and obtained 85 new or improved orbital periods.We present revised space density estimates based upon this new data. We have also added ten more to the eight known examples of an intriguing class of CVs which exhibit peculiar changes in accretion.
SN  - 0035-8711
SN  - 1365-2966
ER  -