AM CVn stars

Below we keep a table with known properties of AM CVn stars.

VALUES LIKE [X] ARE “BEST GUESSES” AND THUS MAY BE COMPLETELY WRONG.VALUES LIKE X? ARE UNCERTAIN.

AM CVn properties

Name Period Pdot d m2(,min) q M1 i Mv V/g RA DEC l b
[s] [s/s] [pc] Msun Msun [deg] [h:m:s] [d:m:s] [deg] [deg]
RX J0806.3+1527 321.52911(2)3.75(6)e-115000 0.27 0.5+/-0.13 0.55 38 21.1 08 06 23.2 +15 27 30.2 206.93 +23.40
V407 Vul 569.395 3.17(10)e-121000-3500(0.068) [0.6] [60 19.9 19 14 26.1 +24 56 44 57.73 +6.4
ES Cet 621 [0] 350/1000 (0.062) [0.6] [60] 6.9-9 16.9 02 00 52.17 -09 24 31.7 168.97 -65.86
AM CVn 1028.73 [0] 606+135-93 0.13(0.01) 0.18 0.71(0.07) 43(2) 4.9+0.37-0.4514.0-14.2 12 34 54.65 +37 37 43.4 140.23 +78.94
SDSSJ1908+3940 1092 [0] [1000] 0.05 [0.6] [60] 16.1 19:08:17.07 +39:40:36.4
HP Lib 1103 [0] 197+14-12 0.048–0.088 0.06–0.18 0.80–0.49 26–34 6.75+0.16-0.17 13.6 15 35 53.0 -14 13 12 352.06 +32.55
PTF1J1919+4815 1350 [0] [2000] 0.04 [0.6] [60] 20.2 19:19:05.19 +48:15:06.2
CR Boo 1471 [0] 337+44-35 0.044–0.088 0.04–0.131.10–0.67 30 6.74+0.32-0.33 13.0-18.0 13 48 55.2 +07 57 35.8 340.96 +66.49
KL Dra 1500 [0] [1000] (0.022) 0.081? [0.6] [60] [6] 16.8-20 19 24 38.28 +59 41 46.7 91.01 +19.20
V803 Cen 1596 [0] 347+32-27 0.059-0.109 0.05–0.14 1.17–0.78 12–15 5.93+0.28-0.29 13.2-17.4 13 23 44.5 -41 44 29.5 309.37 +20.73
SDSS J0926 1699 [0] 460-470 0.035(0.033) 0.041(0.002)0.85(0.04)82.6(0.3) 19 09 26 38.7 +36 24 02.4 187.51 +46.01
CP Eri 1701 [0] [700] (0.019) 0.03? [0.6] [60] ? 16.5-19.7 03 10 32.89 -09 45 06.0 191.70 -52.91
2003aw 2028 [0] [700] (0.015?) 0.036? [0.6] [60] 16.5-20.3 09 05 54.79 -05 36 08.6 235.13 +26.48
2QZ J1427-01 2194? [0] [700] (0.015?) [0.6] [60] 20.0 14 27 01.6 -01 23 10 345.67 +37.17
SDSS J1240 2242 [0] 350-440 (0.014) 0.039 [0.6] [60] 19.6 12 40 58.0 -01 59 20.4 297.57 +60.77
SDSS J0804+1616 2670 [0] [?] (?) [0.6] [60] 18.14 08 04 49.49 +16 16 24.8 205.94 +23.37
SDSS J1411 2760 [0] [400]] (0.013) [0.6] [60] [11.5] 19.4 14 11 18.24 +48 12 57.6 91.89 +63.82
GP Com 2794 [0] 75+2-2 0.009-0.012 0.018 0.5–0.68 [60] 11.54(0.13)15.7-16.0 13 05 43.52 +18 01 02.1 323.55 +80.31
SDSS J0902 2899 [0] [500] (0.01) [0.6] [60] 20.23 09 02 21.35 +38 19 41.9 184.42 41.32
SDSS J1552 3376.3(3) [0] [500] (0.01) [0.6] [60] 20.1 15 52 52.48 +32 01 50.9 51.31 +50.53
CE 315 3906 [0] 77 (0.006) 0.0125 [0.6] [60] 13.2 17.6 13 12 46.5 -23 21 31 309.26 +39.25
SDSS J0129 [0] [500] [0.6] [60] 19.8 01 29 40.06 +38 42 10.4 131.06 -23.58
SDSS J1208 [0] [300] [0.6] [60] 18.8 12 08 41.97 +35 50 25.2 166.52 +77.41
SDSS J2047 [0] [1000] [0.6] [60] 20.8® 20 47 39.4 +00 08 40.3 47.29 -25.54
SDSS J1525 [0] 19.82 15 25 09.57 +36 00 54.5
SDSS J1642 [0] 20.28 16 42 28.06 +19 34 10.0
SDSS J1721 [0] 20.06 17 21 02.48 +27 33 01.2
SNF20060524-042 IS NOT AN AM CVn star!

RX J0806.3+1527

Period and Pdot from Strohmayer 2005
Newest values (q, M1, M2, i, d) from Roelofs et al. 2010

V407 Vul

I corrected Pdot to 3.17e-12 s/s (GN)
Spin-up rate from Ramsay et al 2005
Strohmayer 2004 gives a spin-up rate of 2.3(3)e-12 s/s.
Optical Colours from Ramsay et al 2002
Distance and masses uncertain. The high absorption suggests it is more distant than 100pc, although the exact degree of absorption is uncertain. There is a small probability (~20%) that it is not an ultra-compact binary system (gtbr)
Distance (based on association with G star) from Steeghs et al. 2006

ES Cet

Distance 350pc according to Espaillat et al. 2005, based on direct impact interpretation. GN and co think a disc is more likely (based on the spectra) which would put the system at ~1000pc.

AM CVn

Best determined system: q, i and masses determined from measured central spike and absolute magnitude Roelofs et al,2006, Roelofs et al. 2007b

HP Lib

Distance and system paramters from Roelofs et al. 2007b, based on absolute magnitude

CR Boo

Distance and system paramters from Roelofs et al. 2007b, based on absolute magnitude

KL Dra

Mass ratio based on superhump relation, which is probably not good for AM CVns Roelofs et al,2006

V803 Cen

New orbital period (Roelofs et al, submitted). Distance and system paramters from Roelofs et al. 2007b, based on absolute magnitude.

SDSS J0926

Currently the only known eclipsing AM CVn system Anderson et al 2005
Data on masses, inclination and distance from Copperwheat et al. 2011

CP Eri

Mass ratio based on superhump relation, which is probably not good for AM CVns Roelofs et al,2006

2003aw

The mass ratio is based on the relationship between the orbital period and the period of 2041.5 sec which is taken to be the superhump period Roelofs et al 2005. These authors note that this relationship may not be well calibrated at these extreme mass ratios and may depend on more than q.

2QZ J1427-01

Discovered by Woudt, P. A.; Warner, B.; Rykoff, E.. Period of 2194 sec is likely a superhump period

SDSS J1240

The mass ratio was derived from an optical spectral analysis Roelofs et al 2005. The same authors estimate the distance based on optical spectra and theoretical spectral modelling.

SDSS J0804+1616

SDSS J1411

Discovered by Anderson et al 2005. Period of 46+/-2 min from spectroscopy (Groot et al. submitted)

GP Com

Mass ratio from Steeghs et al. in prep. Distance from Roelofs et al,2006 see also Thorstensen 2003.

SDSS J0902

Discovered by Rau et al 2009. Based on SDSS search Roelofs et al. 2009

CE 315

Mass ratio from Steeghs et al. in prep. Distance from Thorstensen priv. com.

SDSS J0129

Discovered by Anderson et al 2005.

SDSS J1552

Discovered by Anderson et al 2005. Period from Roelofs et al. 2007 (indication already in Anderson et al 2005)

SDSS J1208

Discovered by Groot et al. (submitted). Possible periods 18 and 26 min, but marginal

SDSS J2047

Discovered in supernova search: Prieto et al.

SNF20060524-042

Discovered by PJG in podcast of talk at KITP http://online.itp.ucsb.edu/online/snovae07/progenitor/ (Online in streaming video, not in slides)

Turns out not to be an AM CVn star, but a CV with H in its spectrum.

SDSS J1525

Discovered by Rau et al 2009. Based on SDSS search Roelofs et al. 2009

SDSS J1642

Discovered by Rau et al 2009. Based on SDSS search Roelofs et al. 2009

SDSS J1721

Discovered by Rau et al 2009. Based on SDSS search Roelofs et al. 2009

 
verification_binaries/am_cvn_stars.txt · Last modified: 2016/11/18 21:40 (external edit)
 
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