J/A+A/620/A141ivo://CDS.VizieR/J/A+A/620/A141doi:10.26093/cds/vizier.36200141CDSRamsay G.Green M.J.Marsh T.R.Kupfer T.Breedt E.Korol V.,Groot P.J.Knigge C.Nelemans G.Steeghs D.Woudt P.Aungwerojwit A.2019-08-06T12:58:38Z2018-12-11T07:49:56ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frvariable-starsvisible-astronomytrigonometric-parallaxproper-motionssloan-photometryAM CVn binaries are hydrogen deficient compact binaries with an orbital period in the 5-65min range and are predicted to be strong sources of persistent gravitational wave radiation. Using Gaia, Data Release 2, we present the parallaxes and proper motions of 41 out of the 56 known systems. Compared to the parallax determined using the HST, Fine Guidance Sensor we find that the archetype star, AM CVn, is significantly closer than previously thought. This resolves the high luminosity and mass accretion rate which models had difficulty in explaining. Using Pan-STARRS1 data we determine the absolute magnitude of the AM CVn stars. There is some evidence that donor stars have a higher mass and radius than expected for white dwarfs or that the donors are not white dwarfs. Using the distances to the known AM CVn stars we find strong evidence that a large population of AM CVn stars has yet to be discovered. As this value sets the background to the gravitational wave signal of LISA, this is of wide interest. We determine the mass transfer rate for 15 AM CVn stars and find that the majority has a rate significantly greater than expected from standard models. This is further evidence that the donor star has a greater size than expected.2018A&A...620A.141Rhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/620/A141CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/345 : Gaia DR2 (Gaia Collaboration, 2018)II/349 : The Pan-STARRS release 1 (PS1) Survey - DR1 (Chambers+, 2016)V/147 : The SDSS Photometric Catalogue, Release 12 (Alam+, 2015)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/620/A141https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/620/A141http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/620/A141https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/620/A141https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/620/A141http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/620/A141GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/620/A141/table (Data on 55 AM CVn stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/620/A141/table?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/620/A141/table?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/620/A141/table?GETtext/xml+votable180.050000true121.595166715.458750.0055555555555555566/2297 4153 4354 4653 4655 5110 5455 5675 6068 6266 6939 8244 8591 9434 9732 9770 10098 10714 10799 11133 11577 13471 13764 14379 14924 15130 15912 17497 19791 21831 22629 22955 23924 24897 25724 25952 26171 26446 27982 28633 28822 30041 32422 32503 32798 33765 36707 37385 40355 40920 43606 44116 44518 45546 456082.040811542443644e-19 6.090060298487514e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/620/A141?format=asciiOpticaldefaultJ/A+A/620/A141/refsReferencesBibCodeBibCodemeta.bib.bibcodecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRefReference codemeta.notecharAutAuthor's namemeta.bib.authorcharComCommentsmeta.notecharJ/A+A/620/A141/tableData on 55 AM CVn starsSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSourceSource name (Source)meta.id;meta.maincharANameAlternative name (Alt name)meta.idcharRAJ2000Right ascension (J2000) (RA_J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000) (Dec_J2000)pos.eq.dec;meta.mainRAG? Gaia right ascension (ICRS) at epoch 2015.5 (RA_J2015.5)pos.eq.ranullableDEG? Gaia declination (ICRS) at epoch 2015.5 (DE_J2015.5)pos.eq.decnullableGDR2? Gaia DR2 source ID (GDR2sourceID)meta.idnullablePer? Period in days (Period(d))dtime.perioddoublenullablePerm? Period in minutes (Period)mintime.periodfloatnullablef_PerPeriod flag (Period flag) (1)meta.codecharOutbst?[YN?] does it show outbursts? (Outbursts?)meta.codecharmagRangeRange in magnitude (Mag.Range)phot.magcharr_magRangeReference, in refs.dat file (Reference)meta.ref;pos.framecharPlx? Parallax from GDR2 (Parallax)maspos.parallaxfloatnullablee_Plx? Parallax error (Parallaxerr)masstat.error;pos.parallaxfloatnullableDist? Distance. see paper for details (Distance)pcpos.distance;pos.heliocentricfloatnullablee_Dist? Distance error (Disterr)pcstat.errorfloatnullableE(B-V)Extinction see paper for details (E(B-V))magphot.color.excessfloatAgReddening in g band see paper for details (Ag)magphys.absorptionfloatgmagq? Quiescent g magnitude (g_q)magphot.mag;em.opt.BfloatnullablegMAG? Absolute g magnitude (M_g)magphys.magAbsfloatnullablee_gMAG? Absolute g magnitude error (M_g_err)magstat.errorfloatnullableFFUV? Galex FUV flux (FUV_flux_mJy)mJyphot.flux.density;em.UV.100-200nmdoublenullablee_FFUV? Galex FUV flux error (FUV_fluxerr)mJystat.errordoublenullableFNUV? Galex NUV flux (NUV_flux_mJy)mJyphot.flux.density;em.UV.200-300nmdoublenullablee_FNUV? Galex NUV flux error (NUV_fluxerr)mJystat.errordoublenullableuSmag? SDSS u magnitude (SDSS_u)magphot.mag;em.opt.Ufloatnullablee_uSmag? SDSS u magnitude error (SDSS_u_err)magstat.error;phot.magfloatnullablegSmag? SDSS g magnitude (SDSS_g)magphot.mag;em.opt.Bfloatnullablee_gSmag? SDSS g magnitude error (SDSS_g_err)magstat.error;phot.magfloatnullablerSmag? SDSS r magnitude (SDSS_r)magphot.mag;em.opt.Rfloatnullablee_rSmag? SDSS r magnitude error (SDSS_r_err)magstat.error;phot.magfloatnullableiSmag? SDSS i magnitude (SDSS_i)magphot.mag;em.opt.Ifloatnullablee_iSmag? SDSS i magnitude error (SDSS_i_err)magstat.error;phot.magfloatnullablezSmag? SDSS z magnitude (SDSS_z)magphot.mag;em.opt.Ifloatnullablee_zSmag? SDSS z magnitude error (SDSS_z_err)magstat.error;phot.magfloatnullablegPmag? Panstarrs1 g magnitude (PS1_g)magphot.mag;em.opt.Rfloatnullablee_gPmag? Panstarrs1 g magnitude error (PS1_g_err)magstat.error;phot.magfloatnullablerPmag? Panstarrs1 r magnitude (PS1_r)magphot.mag;em.opt.Rfloatnullablee_rPmag? Panstarrs1 r magnitude error (PS1_r_err)magstat.error;phot.magfloatnullableiPmag? Panstarrs1 i magnitude (PS1_i)magphot.mag;em.opt.Ifloatnullablee_iPmag? Panstarrs1 i magnitude error (PS1_i_err)magstat.error;phot.magfloatnullablezPmag? Panstarrs 1 z magnitude (PS1_z)magphot.mag;em.opt.Ifloatnullablee_zPmag? Panstarrs1 z magnitude error (PS1_z_err)magstat.error;phot.magfloatnullableyPmag? Panstarrs 1 y magnitude (PS1_y)magphot.mag;em.IR.Jfloatnullablee_yPmag? Panstarrs1 y magnitude error (PS1_y_err)magstat.error;phot.magfloatnullableuMmag? Skymapper u magnitude (SkyM_u)magphot.mag;em.opt.Ufloatnullablee_uMmag? Skymapper u magnitude error (SkyM_u_err)magstat.error;phot.magfloatnullablevMmag? Skymapper v magnitude (SkyM_v)magphot.mag;em.opt.Vfloatnullablee_vMmag? Skymapper v magnitude error (SkyM_v_err)magstat.error;phot.magfloatnullablegMmag? Skymapper g magnitude (SkyM_g)magphot.mag;em.opt.Rfloatnullablee_gMmag? Skymapper g magnitude error (SkyM_g_err)magstat.error;phot.magfloatnullablerMmag? Skymapper r magnitude (SkyM_r)magphot.mag;em.opt.Rfloatnullablee_rMmag? Skymapper r magnitude error (SkyM_r_err)magstat.error;phot.magfloatnullableiMmag? Skymapper i magnitude (SkyM_i)magphot.mag;em.opt.Ifloatnullablee_iMmag? Skymapper i magnitude error (SkyM_i_err)magstat.error;phot.magfloatnullablezMmag? Skymapper z magnitude (SkyM_z)magphot.mag;em.opt.Ifloatnullablee_zMmag? Skymapper z magnitude error (SkyM_z_err)magstat.error;phot.magfloatnullableNotesNotes (Notes)meta.notechar