====== 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-11|5000 | 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-12|1000-3500|(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+0.37-0.45|14.0-14.2 |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--0.13|1.10--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(r) |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 [[ADS>2005ApJ...627..920S|Strohmayer 2005]]\\ Newest values (q, M1, M2, i, d) from [[ADS>2010ApJ...711L.138R|Roelofs et al. 2010]]\\ ===== V407 Vul ===== I corrected Pdot to 3.17e-12 s/s (GN)\\ Spin-up rate from [[ADS> 2005MNRAS.357...49R | Ramsay et al 2005]]\\ [[ADS> 2004ApJ...610..416S | Strohmayer 2004]] gives a spin-up rate of 2.3(3)e-12 s/s.\\ Optical Colours from [[ADS> 2002MNRAS.333..575R | 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 [[ADS>2006ApJ...649..382S|Steeghs et al. 2006]]\\ ===== ES Cet ===== Distance 350pc according to [[ADS>2005PASP..117..189E|Espaillat et al. 2005]], based on [[ADS>2002MNRAS.331L...7M|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 [[ADS>2006MNRAS.371.1231R|Roelofs et al,2006]], [[ADS>2007ApJ...666.1174R|Roelofs et al. 2007b]] ===== HP Lib ===== Distance and system paramters from [[ADS>2007ApJ...666.1174R|Roelofs et al. 2007b]], based on absolute magnitude ===== CR Boo ===== Distance and system paramters from [[ADS>2007ApJ...666.1174R|Roelofs et al. 2007b]], based on absolute magnitude ===== KL Dra ===== Mass ratio based on superhump relation, which is probably not good for AM CVns [[ADS>2006MNRAS.371.1231R|Roelofs et al,2006]] ===== V803 Cen ===== New orbital period (Roelofs et al, submitted). Distance and system paramters from [[ADS>2007ApJ...666.1174R|Roelofs et al. 2007b]], based on absolute magnitude. ===== SDSS J0926 ===== Currently the only known eclipsing AM CVn system [[ADS>2005AJ....130.2230A | Anderson et al 2005]]\\ Data on masses, inclination and distance from [[ADS>2011MNRAS.410.1113C|Copperwheat et al. 2011]]\\ ===== CP Eri ===== Mass ratio based on superhump relation, which is probably not good for AM CVns [[ADS>2006MNRAS.371.1231R|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 [[ADS>2006MNRAS.365.1109R|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 [[ADS>2005IAUC.8531....3W|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 [[ADS>2005MNRAS.361..487R|Roelofs et al 2005]]. The same authors estimate the distance based on optical spectra and theoretical spectral modelling. ===== SDSS J0804+1616 ===== See [[ADS>2009MNRAS.394..367R|Roelofs et al. 2009]] ===== SDSS J1411 ===== Discovered by [[ADS>2005AJ....130.2230A | 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 [[ADS>2006MNRAS.371.1231R|Roelofs et al,2006]] see also [[ADS>2003AJ....126.3017T|Thorstensen 2003]]. ===== SDSS J0902 ===== Discovered by [[ADS>2009arXiv0909.4542R|Rau et al 2009]]. Based on SDSS search [[ADS>2009MNRAS.394..367R|Roelofs et al. 2009]] ===== CE 315 ===== Mass ratio from Steeghs et al. in prep. Distance from Thorstensen priv. com. ===== SDSS J0129 ===== Discovered by [[ADS>2005AJ....130.2230A | Anderson et al 2005]]. ===== SDSS J1552 ===== Discovered by [[ADS>2005AJ....130.2230A | Anderson et al 2005]]. Period from [[ADS>2007MNRAS.382.1643R|Roelofs et al. 2007]] (indication already in [[ADS>2005AJ....130.2230A | 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: [[ADS>2006CBET..692....1P|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 [[ADS>2009arXiv0909.4542R|Rau et al 2009]]. Based on SDSS search [[ADS>2009MNRAS.394..367R|Roelofs et al. 2009]] ===== SDSS J1642 ===== Discovered by [[ADS>2009arXiv0909.4542R|Rau et al 2009]]. Based on SDSS search [[ADS>2009MNRAS.394..367R|Roelofs et al. 2009]] ===== SDSS J1721 ===== Discovered by [[ADS>2009arXiv0909.4542R|Rau et al 2009]]. Based on SDSS search [[ADS>2009MNRAS.394..367R|Roelofs et al. 2009]]