---
res:
  bibo_abstract:
  - "White dwarfs (WDs) are the most abundant compact objects, and recent surveys
    have suggested that over a third of WDs in accreting binaries host a strong (B
    \ ≳ 1 MG) magnetic field. However, the origin and evolution of WD magnetism remain
    under debate. Two WD pulsars, AR Sco and J191213.72–441045.1 (J1912), have been
    found, which are non-accreting binaries hosting rapidly spinning (1.97 minutes
    and 5.30 minutes, respectively) magnetic WDs. The WD in AR Sco is slowing down
    on a (math formular) yr timescale. It is believed they will eventually become
    polars, accreting systems in which a magnetic WD (B  ≈ 10−240 MG) accretes from
    a Roche lobe-filling donor spinning in sync with the orbit (≳78 minutes). Here,
    we present multiwavelength data and analysis of Gaia22ayj, which outbursted in
    2022 March. We find that Gaia22ayj is a magnetic accreting WD that is rapidly
    spinning down (math formular\r\n yr) like WD pulsars, but shows clear evidence
    of accretion, like polars. Strong linear polarization (40%) is detected in Gaia22ayj;
    such high levels have only been seen in the WD pulsar AR Sco and demonstrate the
    WD is magnetic. High speed photometry reveals a 9.36 minutes period accompanying
    a high amplitude (∼2 mag) modulation. We associate this with a WD spin or spin–orbit
    beat period, not an orbital period as was previously suggested. Fast (60 s) optical
    spectroscopy reveals a broad \"hump,\" reminiscent of cyclotron emission in polars,
    between 4000 and 8000 Å. We find an X-ray luminosity of (math formular) in the
    0.3–8 keV energy range, while two very large array radio campaigns resulted in
    a non-detection with a Fr < 15.8 μJy 3σ upper limit. The shared properties of
    both WD pulsars and polars suggest that Gaia22ayj is a missing link between the
    two classes of magnetic WD binaries.@eng"
  bibo_authorlist:
  - foaf_Person:
      foaf_givenName: Antonio C.
      foaf_name: Rodriguez, Antonio C.
      foaf_surname: Rodriguez
  - foaf_Person:
      foaf_givenName: Kareem
      foaf_name: El-Badry, Kareem
      foaf_surname: El-Badry
  - foaf_Person:
      foaf_givenName: Pasi
      foaf_name: Hakala, Pasi
      foaf_surname: Hakala
  - foaf_Person:
      foaf_givenName: Pablo
      foaf_name: Rodríguez-Gil, Pablo
      foaf_surname: Rodríguez-Gil
  - foaf_Person:
      foaf_givenName: Tong
      foaf_name: Bao, Tong
      foaf_surname: Bao
  - foaf_Person:
      foaf_givenName: Ilkham
      foaf_name: Galiullin, Ilkham
      foaf_surname: Galiullin
  - foaf_Person:
      foaf_givenName: Jacob A.
      foaf_name: Kurlander, Jacob A.
      foaf_surname: Kurlander
  - foaf_Person:
      foaf_givenName: Casey J.
      foaf_name: Law, Casey J.
      foaf_surname: Law
  - foaf_Person:
      foaf_givenName: Ingrid
      foaf_name: Pelisoli, Ingrid
      foaf_surname: Pelisoli
  - foaf_Person:
      foaf_givenName: Matthias R.
      foaf_name: Schreiber, Matthias R.
      foaf_surname: Schreiber
  - foaf_Person:
      foaf_givenName: Kevin
      foaf_name: Burdge, Kevin
      foaf_surname: Burdge
  - foaf_Person:
      foaf_givenName: Ilaria
      foaf_name: Caiazzo, Ilaria
      foaf_surname: Caiazzo
      foaf_workInfoHomepage: http://www.librecat.org/personId=8ae5b6e7-2a03-11ee-914d-b58ed7a3b47d
    orcid: 0000-0002-4770-5388
  - foaf_Person:
      foaf_givenName: Jan Van
      foaf_name: Roestel, Jan Van
      foaf_surname: Roestel
  - foaf_Person:
      foaf_givenName: Paula
      foaf_name: Szkody, Paula
      foaf_surname: Szkody
  - foaf_Person:
      foaf_givenName: Andrew J.
      foaf_name: Drake, Andrew J.
      foaf_surname: Drake
  - foaf_Person:
      foaf_givenName: David A.H.
      foaf_name: Buckley, David A.H.
      foaf_surname: Buckley
  - foaf_Person:
      foaf_givenName: Stephen B.
      foaf_name: Potter, Stephen B.
      foaf_surname: Potter
  - foaf_Person:
      foaf_givenName: Boris
      foaf_name: Gaensicke, Boris
      foaf_surname: Gaensicke
  - foaf_Person:
      foaf_givenName: Kaya
      foaf_name: Mori, Kaya
      foaf_surname: Mori
  - foaf_Person:
      foaf_givenName: Eric C.
      foaf_name: Bellm, Eric C.
      foaf_surname: Bellm
  - foaf_Person:
      foaf_givenName: Shrinivas R.
      foaf_name: Kulkarni, Shrinivas R.
      foaf_surname: Kulkarni
  - foaf_Person:
      foaf_givenName: Thomas A.
      foaf_name: Prince, Thomas A.
      foaf_surname: Prince
  - foaf_Person:
      foaf_givenName: Matthew
      foaf_name: Graham, Matthew
      foaf_surname: Graham
  - foaf_Person:
      foaf_givenName: Mansi M.
      foaf_name: Kasliwal, Mansi M.
      foaf_surname: Kasliwal
  - foaf_Person:
      foaf_givenName: Sam
      foaf_name: Rose, Sam
      foaf_surname: Rose
  - foaf_Person:
      foaf_givenName: Yashvi
      foaf_name: Sharma, Yashvi
      foaf_surname: Sharma
  - foaf_Person:
      foaf_givenName: Tomás
      foaf_name: Ahumada, Tomás
      foaf_surname: Ahumada
  - foaf_Person:
      foaf_givenName: Shreya
      foaf_name: Anand, Shreya
      foaf_surname: Anand
  - foaf_Person:
      foaf_givenName: Akke
      foaf_name: Viitanen, Akke
      foaf_surname: Viitanen
  - foaf_Person:
      foaf_givenName: Avery
      foaf_name: Wold, Avery
      foaf_surname: Wold
  - foaf_Person:
      foaf_givenName: Tracy X.
      foaf_name: Chen, Tracy X.
      foaf_surname: Chen
  - foaf_Person:
      foaf_givenName: Reed
      foaf_name: Riddle, Reed
      foaf_surname: Riddle
  - foaf_Person:
      foaf_givenName: Roger
      foaf_name: Smith, Roger
      foaf_surname: Smith
  bibo_doi: 10.1088/1538-3873/adb0f1
  bibo_issue: '2'
  bibo_volume: 137
  dct_date: 2025^xs_gYear
  dct_identifier:
  - UT:001427877700001
  dct_isPartOf:
  - http://id.crossref.org/issn/0004-6280
  dct_language: eng
  dct_publisher: IOP Publishing@
  dct_title: 'A link between White Dwarf pulsars and polars: Multiwavelength observations
    of the 9.36-minute period variable Gaia22ayj@'
...