2024A&A...687A.305M

Query : 2024A&A...687A.305M

2024A&A...687A.305M - Astronomy and Astrophysics, volume 687A305 (2024/7-1)

Cataclysmic variables around the period-bounce: An eROSITA-enhanced multiwavelength catalog.

MUNOZ-GIRALDO D., STELZER B. and SCHWOPE A.

Abstract (from CDS):

Context. Cataclysmic variables (CVs) with degenerate donors that have evolved past the period minimum are predicted to make up a great portion of the CV population, namely, between 40% and 80%. However, either due to shortcomings in the models or the intrinsic faintness of these strongly evolved systems, only a few of these so-called “period-bouncers” have been confidently identified thus far.
Aims. We compiled a multiwavelength catalog of period-bouncers and CVs around the period minimum from the literature to provide an in-depth characterization of the elusive subclass of period-bounce CVs that will support the identification of new candidates.
Methods. We combined recently published or archival multiwavelength data with new X-ray observations from the all-sky surveys carried out with the extended ROentgen Survey with an Imaging Telescope Array (eROSITA) on board the Spektrum-Roentgen-Gamma spacecraft (SRG). Our catalog comprises 192 CVs around the period minimum, chosen as likely period-bounce candidates based on reported short orbital periods and low donor mass. This sample helped us establish specific selection parameters, which were used to compile a “scorecard” that rates the likelihood that a particular system is a period-bouncer.
Results. Our “scorecard” correctly assigns high scores to the already confirmed period-bouncers in our literature catalog. It has also identified 103 additional strong period-bounce candidates in the literature that had not previously been classified as such. We established two selection cuts based on the X-ray-to-optical flux ratio (-1.21 ≤ log(Fx/Fopt) ≤ 0) and the typical X-ray luminosity (log(Lx,bol) ≤ 30.4 [erg s–1]) observed from the eight period-bouncers that have already been confirmed with eROSITA data. These X-ray selection cuts led to the updated categorization of seven systems as new period-bouncers, increasing their known population to 24 systems in total.
Conclusions. Our multiwavelength catalog of CVs around the period minimum drawn from the literature, together with X-ray data from eROSITA, has resulted in a ∼40% increase in the population of period-bouncers. Both the catalog and “scorecard” we constructed will aid in future searches for new period-bounce candidates. These tools will contribute to the goal of resolving the discrepancy between the predicted high number of period-bouncers and the low number of these systems successfully observed to date.

Abstract Copyright: © The Authors 2024

Journal keyword(s): catalogs - novae, cataclysmic variables - X-rays: binaries

VizieR on-line data: <Available at CDS (J/A+A/687/A305): tableb2.dat refs.dat table3.dat>

Simbad objects: 192

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Number of rows : 192
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 GALEX J000600.1+012130 CV* 00 06 00.1290518160 +01 21 29.705020056           ~ 4 0
2 V* V402 And CV* 00 11 07.2574908312 +30 32 36.034353888           ~ 22 0
3 MASTER OT J001952.31+464933.0 CV* 00 19 52.31 +46 49 33.0           ~ 4 0
4 V* FL Psc CV* 00 25 11.1124543656 +12 17 12.384853512   16.6 16.78     DC 65 0
5 ASASSN -15po CV* 00 36 35.8221425016 +21 51 25.782562080           ~ 13 0
6 V* PT And CV* 00 40 24.38432400 +41 04 03.1859040           ~ 24 0
7 SDSS J004335.13-003729.8 CV* 00 43 35.1323298096 -00 37 29.848711836           ~ 18 0
8 V* GS Cet CV* 00 50 50.8824768384 +00 09 12.710847384           ~ 14 0
9 ASASSN -16js CV* 00 51 19.2011442600 -65 57 16.673250384           ~ 4 0
10 MASTER OT J005740.99+443101.5 CV* 00 57 40.99 +44 31 01.5           ~ 7 0
11 V* WX Cet CV* 01 17 04.1794193856 -17 56 22.414606224           ~ 173 0
12 CRTS J012059.6+325545 CV* 01 20 59.5844700744 +32 55 45.018441552           ~ 20 0
13 CRTS J014150.4+090822 CV* 01 41 50.3963331739 +09 08 21.829526788           ~ 7 0
14 RX J0154.0-5947 CV* 01 54 00.9316590192 -59 47 49.095380292         16.03 ~ 22 0
15 V* V466 And CV* 02 00 25.4311475340 +44 10 18.501943041   21.16   20.39   ~ 26 0
16 V* KV And CV* 02 17 13.9016014378 +40 41 29.665114908           ~ 29 0
17 ASASSN -14jq CV* 02 21 02.8204288248 +73 22 44.968456020           ~ 9 0
18 V* V572 And CV* 02 22 16.40 +41 22 59.9           ~ 16 0
19 V* PQ And CV* 02 29 29.5680196128 +40 02 39.811816104           DA: 50 0
20 1RXS J023238.8-371812 CV* 02 32 38.0682774984 -37 17 54.912297336       18.4 17.16 DZ 23 0
21 V* HO Cet CV* 02 33 21.3804890163 -10 47 05.416516037           ~ 11 0
22 V* HP Cet CV* 02 33 22.6019660640 +00 50 59.598080484           ~ 24 0
23 V* CT Tri CV* 02 38 39.0 +35 56 48   21.7       ~ 15 0
24 PHL 1445 CV* 02 42 42.9128259072 -11 46 45.103799172   18.37   17.89 17.27 DQ 18 0
25 V* UW Tri No* 02 45 17.23968 +33 31 25.6656           ~ 28 0
26 MASTER OT J030128.77+401104.9 CV* 03 01 28.77 +40 11 04.9           ~ 4 0
27 CRTS CSS141117 J030930+263804 CV* 03 09 29.7506818296 +26 38 04.343722764   19.2   18.1   ~ 15 0
28 V* EF Eri CV* 03 14 13.2526234800 -22 35 42.900077688   15.4 14.53 13.5   DA 453 0
29 V* VX For CV* 03 26 45.7209737911 -34 26 24.667845186           ~ 19 0
30 V* V1265 Tau CV* 03 29 12.26 +12 50 17.6     15.28 15.16   ~ 17 1
31 V* XZ Eri CV* 04 11 25.7623081800 -15 23 23.764734528           ~ 60 0
32 CRTS J041350.0+094515 CV* 04 13 49.98 +09 45 15.3           ~ 6 0
33 ASASSN -15uj CV* 04 36 21.63 -55 25 07.4           ~ 2 0
34 V* AQ Eri CV* 05 06 13.1058945528 -04 08 07.253107476           ~ 89 0
35 MASTER OT J051415.56+671120.3 CV* 05 14 15.56 +67 11 20.3           ~ 3 0
36 V* GR Ori CV* 05 21 35.20 +01 10 08.6           ~ 27 0
37 CRTS J052209.7-350530 CV* 05 22 09.6844036968 -35 05 29.730573852           ~ 8 0
38 V* V391 Cam CV* 05 32 33.8649900816 +62 47 52.124368164 15.07 16.01 16.25 15.79 15.60 ~ 38 0
39 ASASSN -17el CV* 05 39 53.1962409576 -40 36 52.089666984           DA: 6 0
40 RX J0557.3+6832 CV* 05 57 18.4853307888 +68 32 26.649268368           ~ 15 0
41 CRTS J055721.8-363055 CV* 05 57 21.82 -36 30 55.4           ~ 7 0
42 PNV J06000985+1426152 CV* 06 00 10.0722136104 +14 26 12.431190264           ~ 9 0
43 1eRASS J060033.0-270918 CV* 06 00 33.2858384220 -27 09 18.888229115           ~ 13 0
44 ASASSN -14jf CV* 06 06 02.6574317432 -60 39 41.530520849           ~ 7 0
45 V* V805 Aur CV* 06 27 03.7545495088 +39 52 48.789194013           ~ 9 0
46 CRTS J064608.2+403305 CV* 06 46 08.23 +40 33 05.1           ~ 9 0
47 CRTS J064804.5+414702 CV* 06 48 04.51 +41 47 01.8           ~ 6 0
48 MASTER OT J065608.28+744455.2 CV* 06 56 08.28 +74 44 55.2           ~ 6 0
49 V* CG CMa CV* 07 04 05.0453485440 -23 45 34.638260184           ~ 30 0
50 V* AQ CMi CV* 07 14 34.7821463352 +08 48 04.987785960           ~ 20 0
51 V* V496 Aur CV* 07 27 52.29 +40 46 54.1           ~ 14 0
52 MASTER OT J072948.66+593824.4 CV* 07 29 48.5342775504 +59 38 24.324456516           DQ: 11 0
53 2MASS J07341868+2713095 CV* 07 34 18.6704867040 +27 13 09.480721332   20.4   19.7   ~ 7 0
54 V* DY CMi CV* 07 47 27.6404263656 +06 50 49.915740120   19.4   20.0   ~ 14 0
55 SDSS J075107.50+300628.4 CV* 07 51 07.5099585216 +30 06 28.494444240           ~ 12 0
56 CRTS J075418.7+381225 CV* 07 54 18.729 +38 12 25.19           ~ 12 0
57 V* EZ Lyn CV* 08 04 34.2185575584 +51 03 49.366034352       17.4   DC: 85 0
58 V* KK Cnc CV* 08 07 14.2573749628 +11 38 12.533027350           ~ 16 0
59 SDSS J081110.43+660010.3 CV* 08 11 10.4341693248 +66 00 10.019216052           ~ 6 0
60 CRTS J081117.1+152003 CV* 08 11 17.04 +15 20 02.8           ~ 6 0
61 V* SU UMa CV* 08 12 28.2695986944 +62 36 22.427676396           B2 516 0
62 V* SW UMa CV* 08 36 42.7492998204 +53 28 37.976599017           ~ 315 0
63 V* RX Vol CV* 08 39 32.06 -66 17 39.5           ~ 21 0
64 V* EG Cnc CV* 08 43 03.9863206560 +27 51 49.693595508           DAe 195 0
65 V* V498 Hya CV* 08 45 55.0705257312 +03 39 29.257398216           ~ 15 0
66 CRTS J090350.7+330036 CV* 09 03 50.7253230816 +33 00 36.113249628           DQ: 32 0
67 GALEX J090403.5+035501 CV* 09 04 03.4818393575 +03 55 01.259832143   18.7   19.0   ~ 22 0
68 ASASSN -15hn CV* 09 07 05.42 -10 42 45.4           ~ 5 0
69 V* DI UMa CV* 09 12 16.1933315112 +50 53 53.956934520           ~ 89 0
70 PG 0911-066 CV* 09 14 14.0293028112 -06 47 44.773184220   17.6   19.1   ~ 45 0
71 V* DT Pyx CV* 09 18 58.5118903992 -29 42 37.554113628           DA: 20 0
72 SDSS J094759.82+061043.8 CV* 09 47 59.8212917376 +06 10 43.886476524   20.3   19.6   ~ 10 0
73 CRTS J094854.0+014911 CV* 09 48 53.96 +01 49 10.8           ~ 6 0
74 V* RZ LMi CV* 09 51 48.9263549904 +34 07 23.966634108           DA 123 0
75 V* OY Car CV* 10 06 22.0793274312 -70 14 04.584660540           ~ 586 0
76 V* IK Leo CV* 10 21 46.4464048920 +23 49 26.352084288   20.57       ~ 23 0
77 SDSS J102905.24+485515.2 CV* 10 29 05.2516893144 +48 55 15.495857184           DZ: 13 0
78 V* IL Leo CV* 10 31 00.5561075256 +20 28 32.339638848   18.67 18.71     ~ 24 1
79 V* SS LMi CV* 10 34 05.4283639056 +31 08 08.340494676           ~ 27 0
80 ASASSN -17fn CV* 10 35 28.35 +54 19 07.4           ~ 4 0
81 SDSS J103533.02+055158.4 CV* 10 35 33.0226966464 +05 51 58.334599512   18.57 18.80     DA 64 0
82 ASASSN -15kh CV* 10 38 59.93 -36 54 41.5           ~ 3 0
83 CRTS J104411.4+211307 CV* 10 44 11.4139883330 +21 13 06.998531642           ~ 15 0
84 LP 731-60 CV* 10 50 10.8033643200 -14 04 36.760272924     16.76     DC: 42 0
85 CRTS J105122.8+672528 CV* 10 51 22.8996119088 +67 25 28.173563076           ~ 12 0
86 V* EL UMa CV* 10 55 06.9954915576 +36 59 45.840822504           ~ 25 0
87 SDSS J105754.25+275947.5 CV* 10 57 54.2440853064 +27 59 47.461941312           ~ 27 0
88 CRTS J105835.1+054706 CV* 10 58 35.1136427064 +05 47 06.181235772           ~ 9 0
89 WISE J111217.37-353829.1 CV* 11 12 17.4085540992 -35 38 29.111693388           ~ 15 0
90 V* V436 Cen CV* 11 14 00.0568720872 -37 40 47.763655572           ~ 148 0
91 CRTS CSS130106 J112619+084651 CV* 11 26 19.0 +08 46 51           ~ 5 0
92 SDSS J115207.00+404947.6 CV* 11 52 07.0049089008 +40 49 47.903371500           ~ 25 0
93 V* V379 Vir CV* 12 12 09.3077194872 +01 36 27.771237504           DAH 78 0
94 ASASSN -15bp CV* 12 12 40.4215281024 +04 16 55.877652552           ~ 8 0
95 SDSS J121607.03+052013.9 CV* 12 16 07.0370194344 +05 20 13.944107004           ~ 18 0
96 PM J12192+2049 CV* 12 19 13.0489798728 +20 49 38.675936352     19.38     ~ 20 0
97 CRTS J122221.6-311525 CV* 12 22 21.6662638104 -31 15 23.828998536   18.2   18.2   ~ 45 0
98 ASASSN -16dt CV* 12 26 25.4426464532 -11 33 02.942083096           ~ 5 0
99 V* GP CVn CV* 12 27 40.8198845784 +51 39 24.962023620   18.89 19.08     DA+M 40 0
100 V* AL Com CV* 12 32 25.7951754648 +14 20 42.292188276     16.2     ~ 249 0
101 V* V406 Vir CV* 12 38 13.7337832872 -03 39 32.965818228           DA3e 62 0
102 V* V591 Cen CV* 12 42 18.0943539960 -33 34 09.764729472           G5/8V 15 0
103 PM J12507+1549 CV* 12 50 44.4484545000 +15 49 57.602557956     18.28     DAP 42 0
104 V* MT Com CV* 12 55 10.5637132704 +26 42 26.595387504           ~ 42 0
105 CRTS J125905.8+242634 CV* 12 59 05.78 +24 26 34.4           ~ 7 0
106 V* V1258 Cen CV* 13 00 29.0630127912 -30 52 56.960840244           ~ 25 0
107 V* HV Vir CV* 13 21 03.1661521320 +01 53 29.075499492           DA 162 0
108 ASASSN -16bh CV* 13 24 57.21 -27 56 10.9           ~ 3 0
109 V* V355 UMa CV* 13 39 41.1389765496 +48 47 27.466647216   17.2 18.01 17.3   DC: 58 1
110 PM J14332+1011 CV* 14 33 17.7877088088 +10 11 23.484691356     18.86     ~ 60 0
111 SDSS J143435.37+334049.9 CV* 14 34 35.3858754024 +33 40 49.985951808       19.82 19.54 ~ 9 0
112 SDSS J143544.03+233638.7 CV* 14 35 44.0355766056 +23 36 38.666437848           DZ: 16 0
113 CRTS J144252.0-225040 CV* 14 42 52.02 -22 50 39.7           ~ 7 0
114 V* UZ Boo CV* 14 44 01.2123285360 +22 00 54.812924316           ~ 78 1
115 ASASSN -17ei CV* 14 49 53.64 -34 26 10.9           ~ 3 0
116 SDSS J150137.22+550123.4 CV* 15 01 37.2173710728 +55 01 23.280739320   18.2   18.8   DA: 35 0
117 V* NZ Boo CV* 15 02 41.0007781680 +33 34 24.002686380           ~ 47 0
118 V* OV Boo CV* 15 07 22.3698571080 +52 30 39.804859764   18.7   18.5   DAe 82 0
119 V* PP Boo CV* 15 14 13.7263344648 +45 49 11.843138748     19.45     ~ 17 0
120 SDSS J151415.65+074446.4 CV* 15 14 15.6753653496 +07 44 46.745889324           DAH 31 0
121 ASASSN -15gn CV* 15 19 29.60 -24 40 00.7           ~ 4 0
122 V* GW Lib No* 15 19 55.3333785336 -25 00 24.614534520           DA: 228 0
123 V* QZ Lib CV* 15 36 15.9757214232 -08 39 07.522042824           ~ 41 0
124 TCP J15375685-2440136 CV* 15 37 56.85 -24 40 13.6           ~ 5 0
125 CRTS CSS160906 J160346+193540 CV* 16 03 46.0799927176 +19 35 39.951197980           ~ 9 0
126 SMSS J160639.78-100010.7 WD* 16 06 39.9236308176 -10 00 09.650239308           DC: 10 0
127 CRTS J161027.6+090739 CV* 16 10 27.6134582256 +09 07 38.368078644           ~ 19 0
128 V* FL TrA CV* 16 30 36.3756179631 -61 50 28.224108013           ~ 20 0
129 V* V592 Her No* 16 30 56.400 +21 16 58.49           ~ 55 0
130 ASASSN -15jd CV* 16 49 25.4364260808 +14 02 43.547372088           ~ 9 0
131 UCAC3 131-193943 CV* 16 53 49.0491013440 -24 46 23.213347464   12.66 12.16 12.163 11.63 ~ 5 0
132 SDSS J165359.06+201010.4 CV* 16 53 59.0599392384 +20 10 10.399004940     17.56     ~ 21 0
133 ASASSN -17hw CV* 17 00 34.30 -08 54 03.2           ~ 2 0
134 CRTS J170343.5+090835 CV* 17 03 43.55 +09 08 34.8           ~ 5 0
135 PNV J17144255-2943481 CV* 17 14 42.6180428736 -29 43 45.170136192         15.541 DB: 16 0
136 SDSS J172805.32+775117.4 CV* 17 28 05.3431971317 +77 51 17.648901244           ~ 3 0
137 PNV J17292916+0054043 CV* 17 29 29.4731213395 +00 54 04.343595053           ~ 7 0
138 V* MM Sco CV* 17 30 45.2351996044 -42 11 42.493377918           ~ 31 0
139 ASASSN -15hd CV* 17 31 25.45 +27 54 28.5           ~ 3 0
140 CRTS J173516.9+154708 CV* 17 35 16.9114870108 +15 47 08.247130336           ~ 15 0
141 CRTS CSS130418 J174033+414756 CV* 17 40 33.4638975720 +41 47 55.977218592   19.61   19.47   ~ 18 0
142 ASASSN -14cv CV* 17 43 48.5748176784 +52 03 45.757209816           ~ 18 0
143 ASASSN -16jb CV* 17 50 44.9742279936 -25 58 37.306610040           ~ 6 0
144 TCP J17521907+5001155 CV* 17 52 19.07 +50 01 15.5           ~ 4 0
145 V* PR Her CV* 18 08 04.4519503992 +38 46 16.935217968           ~ 20 0
146 V* IX Dra CV* 18 12 31.4711619792 +67 04 45.821734572           sdB 49 0
147 V* DV Dra CV* 18 17 23.10 +50 48 18.1           ~ 22 0
148 GALEX J181953.9+361358 UV 18 19 53.9 +36 13 58           ~ 2 0
149 GALEX J182201.9+324908 CV* 18 22 01.93 +32 49 06.7           ~ 5 0
150 V* V1108 Her CV* 18 39 26.1625941904 +26 04 09.760778158     12.0     ~ 36 1
151 ASASSN -15ni CV* 18 39 58.04 +22 21 17.7           ~ 9 0
152 V* V529 Dra CV* 18 42 28.0582450224 +48 37 41.627137044           ~ 3 0
153 ASASSN -14jv CV* 18 53 28.8104589864 +42 03 43.159817916           ~ 15 0
154 V* V358 Lyr CV* 18 59 32.95 +42 24 12.2           ~ 26 0
155 V* V585 Lyr CV* 19 13 58.3768934306 +40 44 11.803301682           ~ 32 0
156 V* V1838 Aql CV* 19 15 02.1126096064 +07 19 47.858736775           ~ 21 0
157 ASASSN -15na CV* 19 19 08.84 -49 45 41.0           ~ 3 0
158 V* V2176 Cyg CV* 19 27 11.7259013136 +54 17 50.812880496           ~ 24 0
159 V* KX Aql CV* 19 33 53.6443501875 +14 17 48.323736283           ~ 32 0
160 V* V1141 Aql CV* 19 37 09.8216049509 +02 36 00.934362713           ~ 24 0
161 V* DO Vul CV* 19 52 10.7246003935 +19 34 42.225852716           ~ 20 0
162 V* V1454 Cyg CV* 19 53 38.4919151775 +35 21 45.719296525           ~ 27 1
163 V* V498 Vul CV* 19 59 51.2723134645 +22 42 29.385236426           ~ 14 0
164 V* V1028 Cyg CV* 20 00 56.4596100362 +56 56 37.060154519           ~ 55 0
165 CRTS J200331.3-284941 CV* 20 03 31.2539217480 -28 49 41.487670956     18.8     ~ 13 0
166 V* WZ Sge CV* 20 07 36.5037622512 +17 42 14.733254952   15.30 15.20 10.817   D 982 0
167 PNV J20205397+2508145 CV* 20 20 54.35 +25 08 15.9           ~ 3 0
168 ASASSN -17jf CV* 20 29 17.0776621956 -43 40 18.605892068           ~ 4 0
169 V* SY Cap CV* 20 29 47.5398684144 -15 54 37.427272308   18.8 18.19 17.7 17.66 ~ 15 0
170 Gaia DR2 2181057132479191936 CV* 20 31 55.0870756172 +51 19 38.423997726           ~ 2 0
171 MASTER OT J203749.39+552210.3 CV* 20 37 49.39 +55 22 10.3           ~ 11 0
172 SDSS J204817.85-061044.8 CV* 20 48 17.8483614432 -06 10 44.748728040           ~ 20 0
173 CRTS CSS121004 J205146-035827 CV* 20 51 46.2288784392 -03 58 27.511454500           ~ 5 0
174 TCP J21040470+4631129 CV* 21 04 04.6781176128 +46 31 14.463517476           DQ 26 0
175 ASASSN -15pu CV* 21 11 04.689 -39 56 33.97           ~ 3 0
176 GALEX J211258.7+242145 CV* 21 12 58.7278031664 +24 21 45.349624548   20.8   20.4   ~ 17 0
177 CRTS CSS120922 J214934-121908 CV* 21 49 34.19 -12 19 08.2           ~ 7 0
178 Lan 420 CV* 22 02 43.0902981724 +59 03 20.593522155   17.2       ~ 10 0
179 CRTS J220554.0+115554 CV* 22 05 53.9741753952 +11 55 53.713764372           ~ 25 0
180 MASTER OT J220559.40-341434.9 CV* 22 05 59.4213273528 -34 14 33.745345980           ~ 11 0
181 MASTER OT J221811.12+654219.9 CV* 22 18 10.9674531720 +65 42 19.850221836   19.9   19.3   ~ 5 0
182 2QZ J222416.2-292421 CV* 22 24 16.2686277216 -29 24 21.661900272           ~ 12 0
183 CRTS J224736.4+250436 CV* 22 47 36.37920 +25 04 36.3216           ~ 8 0
184 CRTS J224739.7-362254 CV* 22 47 39.6543990168 -36 22 53.588354340           ~ 9 0
185 ASASSN -16hg CV* 22 48 41.03 -35 04 40.1           ~ 3 0
186 GD 552 CV* 22 50 39.9583863216 +63 28 38.330366988   16 16.47     D 74 0
187 CRTS J230425.9+062546 CV* 23 04 25.8890306928 +06 25 45.695047980           ~ 16 0
188 PNV J23272715+0855391 CV* 23 27 27.15 +08 55 39.1           ~ 8 0
189 V* V455 And CV* 23 34 01.4484962496 +39 21 40.866079356   16.220 16.094 16.137   DQ 166 0
190 TCP J23382254-2049518 CV* 23 38 22.4691388041 -20 49 52.167638244           ~ 5 0
191 V* BW Scl CV* 23 53 00.8741941392 -38 51 46.662458688   16.7       D 85 0
192 V* DI Phe CV* 23 54 20.4574289520 -47 00 20.249299224           ~ 12 0

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