2018A&A...620A.141R

Query : 2018A&A...620A.141R

2018A&A...620A.141R - Astronomy and Astrophysics, volume 620A, 141-141 (2018/12-1)

Physical properties of AM CVn stars: New insights from Gaia DR2.

RAMSAY G., GREEN M.J., MARSH T.R., KUPFER T., BREEDT E., KOROL V., GROOT P.J., KNIGGE C., NELEMANS G., STEEGHS D., WOUDT P. and AUNGWEROJWIT A.

Abstract (from CDS):

AM CVn binaries are hydrogen deficient compact binaries with an orbital period in the 5-65 min 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.

Abstract Copyright: © ESO 2018

Journal keyword(s): accretion, accretion disks - stars: distances - white dwarfs

VizieR on-line data: <Available at CDS (J/A+A/620/A141): table.dat table.fits refs.dat>

CDS comments: Table 1 SDSS J0807+4852 not identified.

Simbad objects: 62

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Number of rows : 62
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 CRTS J010550.1+190317 CV* 01 05 50.1000105480 +19 03 17.020632528   19.62 19.71   19.64 ~ 7 0
2 V* V744 And CV* 01 29 40.0640187576 +38 42 10.454885388           DB 27 0
3 V* ES Cet CV* 02 00 52.2358544184 -09 24 31.643735904   16.3   16.7 16.97 ~ 84 0
4 ASASSN -14ei CV* 02 55 33.2827615680 -47 50 42.318859668   17.6   18.3   ~ 10 0
5 PHL 1475 CV* 03 10 32.7677788896 -09 45 06.178429764           DB+ 94 0
6 SV* BV 1025 CV* 03 55 41.5633620336 -82 25 31.830188628   16.10 14.92 14.78   ~ 8 0
7 CRTS J043517.8+002941 CV* 04 35 17.73 +00 29 40.7           ~ 10 0
8 CRTS J045020.8-093113 CV* 04 50 20.0 -09 31 13           ~ 11 0
9 OGLE MC-DN-30 CV* 06 27 20.5138352448 -75 13 33.610885608         18.224 ~ 4 0
10 ASASSN -14mv CV* 07 13 27.2826924408 +20 55 53.285034396   16.8   17.7   ~ 15 0
11 PTF1 J071912.13+485834.0 CV* 07 19 12.1179047304 +48 58 34.704243516           ~ 22 0
12 CRTS J074419.7+325448 CV* 07 44 19.7434026816 +32 54 48.242704896           ~ 6 0
13 SDSS J080449.49+161624.8 CV* 08 04 49.4916114456 +16 16 24.871098576           ~ 24 0
14 RX J0806.3+1527 XB* 08 06 22.9520149296 +15 27 31.002199488   20.7 20   21.2 ~ 144 0
15 CRTS J084413.6-012807 CV* 08 44 13.6 -01 28 07           ~ 5 0
16 PTF1 J085724.27+072946.7 CV* 08 57 24.27384 +07 29 46.3812           ~ 6 0
17 SDSS J090221.35+381941.9 CV* 09 02 21.3652480056 +38 19 41.845327536           ~ 21 0
18 V* V406 Hya CV* 09 05 54.7505191800 -05 36 08.499665160   19.8 16.5 19.1   ~ 53 0
19 CRTS CSS150211 J091017-200813 CV* 09 10 17.0 -20 08 13           ~ 1 0
20 V* YZ LMi CV* 09 26 38.7250463760 +36 24 02.456809632           DB 65 0
21 PTF1 J094329.59+102957.6 CV* 09 43 29.5972620768 +10 29 57.372519660           ~ 9 0
22 SDSS J104325.06+563258.1 CV* 10 43 25.0792761480 +56 32 57.991852644   20.28   20.40 20.58 ~ 10 0
23 SDSS J113732.32+405458.3 CV* 11 37 32.3210580864 +40 54 58.488391584           ~ 16 0
24 MASTER OT J120251.56-454116.7 CV* 12 02 51.5487213675 -45 41 16.597730425           ~ 5 0
25 SDSS J120841.96+355025.2 CV* 12 08 42.0097813752 +35 50 25.389961512           ~ 29 0
26 V* AM CVn CV* 12 34 54.6231062664 +37 37 44.120620056   14.02 14.13 14.47   DBnnp 407 0
27 2QZ J124058.0-015920 CV* 12 40 58.0278645048 -01 59 19.190494500   19.2   19.6   DBe 55 0
28 G 61-29 CV* 13 05 42.4009686696 +18 01 03.763561619   16.059 16.101 15.825   DBe 265 0
29 V* V396 Hya CV* 13 12 46.4399548464 -23 21 32.595789924   18.9   17.5   DD 101 0
30 GALEX J131954.4+591514 CV* 13 19 54.5180306400 +59 15 14.570461584   19.3   19.4   ~ 8 0
31 V* V803 Cen CV* 13 23 44.5389056832 -41 44 29.446810404   16.8 14.42     ~ 148 0
32 V* CR Boo CV* 13 48 55.2218717736 +07 57 35.724118680     15.00     ~ 176 0
33 SDSS J135154.46-064309.0 CV* 13 51 54.4579886880 -06 43 08.878819836           ~ 12 0
34 PM J14113+4812 CV* 14 11 18.3205488696 +48 12 57.513947976   18.7 19.37 19.2   DB 32 0
35 V* V558 Vir CV* 14 27 01.5877214400 -01 23 10.251361932   20.5 20.07 19.7   ~ 21 1
36 SDSS J150551.58+065948.7 CV* 15 05 51.5687865312 +06 59 48.892792020           ~ 15 0
37 PTF1 J152310.71+184558.2 CV* 15 23 10.71 +18 45 58.2           ~ 4 0
38 Gaia DR3 1375135415921155968 * 15 24 36.1199272320 +36 06 26.992485684           ~ 1 0
39 Gaia DR3 1375131155313567232 * 15 25 09.1577889768 +36 01 23.839665276           ~ 1 0
40 SDSS J152509.57+360054.5 CV* 15 25 09.5666649096 +36 00 54.667775664           ~ 14 0
41 V* HP Lib CV* 15 35 53.0715009672 -14 13 12.215196048   13.55       Bpec 103 0
42 ASASSN -15kf CV* 15 38 38.2026560808 -30 35 50.218945008           ~ 4 0
43 SDSS J155252.48+320150.9 CV* 15 52 52.4801803680 +32 01 51.021702228           DB 22 0
44 ASASSN -14cn CV* 16 11 33.9748642392 +63 08 31.883598492   17.8   18.6   ~ 34 1
45 CRTS J163239.3+351108 CV* 16 32 39.39 +35 11 07.3           ~ 7 0
46 SDSS J164228.06+193410.0 CV* 16 42 28.0674497832 +19 34 10.123769532           ~ 13 0
47 CRTS J172102.5+273301 CV* 17 21 02.4807189576 +27 33 01.237260204           D 19 0
48 CRTS J173047.5+554518 CV* 17 30 47.5859491248 +55 45 18.454034376   20.20   20.08   ~ 13 0
49 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 14393 0
50 CXOGBS J175107.6-294037 CV* 17 51 07.6557820800 -29 40 37.344991512           ~ 11 0
51 ASASSN -17fp CV* 18 08 51.10 -73 04 04.2           ~ 5 0
52 UCAC3 260-149285 CV* 19 08 17.0797893576 +39 40 36.448547088   15.18 15.43 17.11 15.24 ~ 37 0
53 RX J1914.4+2456 XB* 19 14 26.0922577338 +24 56 43.322660677           ~ 138 0
54 PTF1 J191905.19+481506.2 CV* 19 19 05.1816067272 +48 15 06.046801524           ~ 23 0
55 Gaia DR3 2239448930851818112 * 19 23 48.8823442104 +59 36 37.517205888           ~ 1 0
56 V* KL Dra CV* 19 24 38.2451853000 +59 41 46.722283224   16.8       DB+ 61 1
57 V* PU Aqr CV* 20 47 39.41 +00 08 40.2           ~ 8 0
58 ASASSN -14cc CV* 21 39 48.2481573384 -59 59 32.847656820           ~ 10 0
59 V* SS Cyg CV* 21 42 42.8034497592 +43 35 09.867842484 11.07 12.651 12.032 9.326   K5V 1290 1
60 PTF1 J221910.09+313523.1 CV* 22 19 10.09 +31 35 23.1           ~ 8 0
61 V* IP Peg CV* 23 23 08.5362249504 +18 24 59.206884012           M2 381 0
62 ASASSN -14fv CV? 23 29 55.13 +44 56 14.4           ~ 4 0

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