UV-excess sources with a red/IR-counterpart: low-mass companions, debris disks and QSO selection

Article, Preprint English OPEN
Verbeek, Kars ; Groot, Paul J. ; Scaringi, Simone ; Casares, Jorge ; Corral-Santana, Jesus M. ; Deacon, Niall ; Drew, Janet E. ; Gänsicke, Boris T. ; González-Solares, Eduardo ; Greimel, Robert ; Heber, Ulrich ; Napiwotzki, Ralf ; Østensen, Roy H. ; Steeghs, Danny ; Wright, Nicholas J. ; Zijlstra, Albert (2013)
  • Publisher: Oxford University Press
  • Related identifiers: doi: 10.1093/mnras/stt1492
  • Subject: Astrophysics - Solar and Stellar Astrophysics | QB460

We present the result of the cross-matching between ultraviolet (UV)-excess sources selected from the UV-Excess Survey of the Northern Galactic Plane (UVEX) and several infrared (IR) surveys (2MASS, UKIDSS and WISE). From the position in the (J − H) versus (H − K) colour–colour diagram, we select UV-excess candidate white dwarfs with an M-dwarf type companion, candidates that might have a lower mass, brown-dwarf type companion and candidates showing an IR-excess only in the K band, which might be due to a debris disc. Grids of reddened DA+dM and sdO+MS/sdB+MS model spectra are fitted to the U, g, r, i, z, J, H, K photometry in order to determine spectral types and estimate temperatures and reddening. From a sample of 964 hot candidate white dwarfs with (g − r) < 0.2, the spectral energy distribution fitting shows that ∼2–4 per cent of the white dwarfs have an M-dwarf companion, ∼2 per cent have a lower-mass companion, and no clear candidates for having a debris disc are found. Additionally, from WISE six UV-excess sources are selected as candidate quasi-stellar objects (QSOs). Two UV-excess sources have a WISE IR-excess showing up only in the mid-IR W3 band of WISE, making them candidate luminous infrared galaxies (LIRGs) or Sbc starburst galaxies.
  • References (24)
    24 references, page 1 of 3

    Adelman-McCarthy, J. K.; et al., 2011, yCat 2306, 0A Aihara H., Allende Prieto C., An D., Anderson S.F. Aubourg E., Balbinot E., Beers T.C., et al., 2011, ApJS 193, 29A

    Augusteijn T., Greimel R., van den Besselaar E.J.M., Groot P.J., Morales-Rueda L., 2008, A&A 486, 843A Barber S.D., Patterson A.J., Kilic L., Leggett S.K., Dufour P., Bloom J.S., Starr D.L., 2012, ApJ 760, 26 Barentsen G., Vink J.S., Drew J.E., Greimel R. et al., 2011, MNRAS 415, 103B

    Beuermann K, 2006, A&A 460, 783B Blanton M.R. and Roweis S., 2007, AJ 133, 734B Brinkworth C.S., Ga¨nsicke B.T., Marsh T.R., Hoard D.W., Tappert C., 2009, ApJ 696, 1402B

    Brinkworth C.S., G¨ansicke B.T., Girven J.M., Hoard D.W., Marsh T.R., Parsons S.G., Koester D., 2012, ApJ 750, 86B Cabrera-Lavers A., Bilir S., Ak S., Yaz E., LopezCorredoira M., 2007, A&A 464, 565C Cardelli J.A., Clayton G.C. & Mathis J.S., 1989, ApJ 345, 245

    Casali M., Adamson A., Alves de Oliveira C., Almaini O., Burch K., Chuter T., Elliot J. et al., 2007, A&A 467, 777C Corradi R. L. M., Valentini M., Munari U., Drew J. E., et al., 2010, A&A 509, 41

    Corradi R.L.M., Sabin L., Miszalski B., Rodrguez-Gil P., Santander-Garca M., Jones D., Drew J.E. et al., 2011, MNRAS 410, 1349C

    Cutri R.M., Skrutskie M.F., van Dyk S. et al., 2003, yCat 2246, 0C

    Cutri R.M. et al., 2012, yCat 2311, 0C Deacon N.R., Groot P.J., Drew J.E., et al., 2009, MNRAS.397, 1685

    Debes J.H., Hoard D.W., Wachter S., Leisawitz D.T., Cohen M., 2011, ApJS 197, 38D

    Debes J.H., Walsh K.J., Stark C., 2012, ApJ 747, 148D Debes J.H., Hoard D.W., Kilic M., Wachter S., Leisawitz D.T., Cohen M., Kirkpatrick J.D., Griffith R.L., 2011, ApJ 729, 4D

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