2026A&A...706A.249G

Query : 2026A&A...706A.249G

2026A&A...706A.249G - Astronomy and Astrophysics, volume 706A249 (2026/2-1)

Analysis of mass-transferring binary candidates in the Milky Way.

GARCIA-MORENO G., BLAGORODNOVA N., ANDERS F., WEILER M., WICHERN H., BRITAVSKIY N. and DE WET S.

Abstract (from CDS):

Mass transfer between stars in binary systems profoundly impacts their evolution, yet many aspects of this process-especially the stability, mass loss, and eventual fate of such systems-remain poorly understood. One promising avenue to constrain these processes is through the identification and characterisation of systems undergoing active mass transfer. Inspired by the slow brightening preceding stellar merger transients, we worked on a method to identify Galactic mass-transferring binaries in which the donor is a Hertzsprung gap (HG) star. We constructed an initial sample of HG stars using the Gaia Early Data Release 3 contribution Starhorse catalogue, and we identified candidate mass-transferring systems by selecting sources that exhibit Balmer emission features (as seen in the low-resolution Gaia XP spectra), mid-infrared excess (from WISE photometry), and photometric variability (inferred from the error in the GaiaG-band magnitude). This multi-criteria selection yielded a sample of 67 candidates, which we further analysed using complementary photometric and spectroscopic data, as well as information from cross-matched archival catalogues. Among our candidates, we identified at least nine eclipsing binaries and some sources that are potential binaries as well. Three sources in our sample are strong candidates for mass-transferring binaries with a yellow component, and three more are binaries with a Be star. Notably, three sources in our sample are strong candidates for hosting a compact companion, based on their ultraviolet or X-ray signatures. The main sources of contamination in our search are hot but highly reddened stars-primarily Oe and Be stars-as well as regular pulsating stars such as δ Scuti and Cepheid variables. As an additional outcome of this work, we present a refined new catalogue of 308 HG stars, selected using improved extinction corrections and stricter emission-line criteria. This enhanced sample is expected to contain a significantly higher fraction of scientifically valuable mass-transferring binaries.

Abstract Copyright: © The Authors 2026

Journal keyword(s): binaries: close - binaries: eclipsing - stars: emission-line - Be - Hertzsprung-Russell and C-M diagrams

VizieR on-line data: <Available at CDS (J/A+A/706/A249): hg_cat.dat>

Status at CDS : Tables of objects will be appraised for possible ingestion in SIMBAD. // All or part of tables of objects will be ingested in SIMBAD with priority 1.

Simbad objects: 77

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Number of rows : 77
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 Gaia DR3 428103652673049728 Em* 00 29 13.1988290863 +59 18 57.334957847           ~ 2 0
2 UCAC4 775-002921 SB* 00 32 45.9842254988 +64 58 09.738145404   15.055 13.874 13.538   ~ 3 0
3 Gaia DR3 526939882463713152 * 00 37 06.3293267993 +63 42 25.177132101           ~ 1 0
4 LS I +63 148 * 01 28 49.5534472944 +63 50 58.006826844   12.89 11.95     B 9 0
5 EM* VES 668 Em* 02 02 31.2062128584 +61 00 12.772652364   12.28 11.57     B 14 0
6 ZTF J025652.53+571359.5 dS* 02 56 52.5335499969 +57 13 59.457786802           ~ 3 0
7 LS I +58 104 * 02 59 20.1116198832 +58 44 41.735302584 12.23 12.24 11.33     B 9 0
8 Gaia DR3 473575777103322496 * 04 03 41.3780445262 +60 14 48.369839183           ~ 1 0
9 Gaia DR3 187219239343050880 * 05 14 12.0125375231 +37 00 15.152345244           ~ 1 0
10 BD+29 976 Em* 05 44 13.4781035136 +29 09 11.022450120   11.32 10.93     B 14 0
11 TYC 1328-1401-1 * 06 31 35.7324760872 +16 28 50.341024992   12.09 11.745     ~ 2 0
12 HD 261168 * 06 38 41.9945752080 +13 42 25.480568268   10.04 9.96     B2 11 0
13 HD 50846 SB* 06 54 54.7081653504 -01 22 32.850081768   8.44 8.43     B5/7Ib 162 0
14 V* V838 Mon CV* 07 04 04.8221494992 -03 50 50.648894412       15.181 14.51 M10+B3V 462 1
15 V* GV CMa LP* 07 08 14.0407681056 -18 30 33.344494236   11.24 10.14     ~ 5 0
16 Gaia DR3 5617186348318629248 * 07 11 37.6829423976 -25 31 25.220020751           ~ 1 0
17 TYC 6551-3237-1 * 07 39 46.4006489112 -29 48 31.124865456   10.51 10.34     ~ 1 0
18 ATO J117.0976-34.3848 V* 07 48 23.4369113667 -34 23 05.474196936   14.809 13.070 12.488   ~ 2 0
19 Gaia DR3 5524022735225482624 EB* 08 43 27.5718274324 -43 35 01.457719770           ~ 2 0
20 Gaia DR3 5328449200388495616 * 08 52 08.1011894204 -48 34 43.415698150           ~ 1 0
21 Gaia DR3 5323384162646755712 * 08 58 43.4331809262 -53 08 19.861679123           ~ 1 0
22 Gaia DR3 5311969857556479616 EB* 09 14 53.0041505768 -51 45 44.799086800           ~ 2 0
23 Gaia DR3 5326288831829996416 * 09 20 41.7978033138 -48 11 53.618782023           ~ 1 0
24 HD 303353 Em* 10 50 01.0527681552 -58 17 57.024748932 11.15 11.35 10.69 10.55   B8 17 0
25 Gaia DR3 5338183383022960512 * 10 55 24.4049107625 -60 53 24.655012616           ~ 1 0
26 Gaia DR3 6053890788968694656 * 12 37 05.3677972863 -62 28 11.118793700           ~ 1 0
27 V* W Vir WV* 13 26 01.9928807928 -03 22 43.431062880   10.33 9.46 9.29 9.393 F2Ibe 320 0
28 Gaia DR3 5868425648663616768 * 13 26 38.4527418345 -61 54 41.756955024           ~ 1 0
29 Gaia DR3 5866345647515558400 * 13 58 26.1643489804 -61 37 02.514935551           ~ 1 0
30 Gaia DR3 5866474526572151936 * 14 05 07.7317489859 -60 53 57.400324323           ~ 1 0
31 TYC 7285-75-1 * 14 08 01.1649646800 -33 15 43.010515980   11.98 11.69     ~ 3 0
32 CRTS J145247.1-254721 EB* 14 52 46.8960357520 -25 47 23.477838617   16.070 15.461 15.387   ~ 3 0
33 Gaia DR3 5880159842877908352 * 15 12 35.5025302049 -57 54 04.843827614           ~ 1 0
34 TYC 8704-1822-1 * 15 43 04.7283159504 -56 31 44.346330876   12.10 11.64     ~ 2 0
35 Gaia DR3 6052463412400724992 * 16 35 07.3428782939 -20 43 33.423565868           ~ 1 0
36 Gaia DR3 5966574133883852416 * 16 58 05.0078327153 -41 28 33.817782651           ~ 1 0
37 Gaia DR3 5965503866703572480 * 17 07 17.4065669574 -42 27 48.981809800           ~ 1 0
38 2MASS J17085880-4635492 LP* 17 08 58.7986570258 -46 35 49.385234276           ~ 2 0
39 HD 318347 Em* 17 46 45.2331645768 -32 37 51.960601452 11.07 11.21 10.02 10.07   G0 17 0
40 V* V1309 Sco CV* 17 57 32.9368332984 -30 43 09.965039880           ~ 320 0
41 OGLE-2002-BLG-360 CV* 17 57 39.0404346105 -29 46 05.762196592           ~ 57 0
42 IRAS 18174-1948 LP? 18 20 23.5859356608 -19 46 46.530959268           ~ 3 0
43 TYC 6269-839-1 * 18 21 41.7128244648 -17 37 20.092583568   11.05 10.49     ~ 1 0
44 V* TZ Dra EB* 18 22 11.6750978448 +47 34 07.958531172   9.56 9.331 9.627   A7V: 83 0
45 ZTF J183338.78-011142.1 LP* 18 33 38.7871881676 -01 11 42.206483025           ~ 3 0
46 Gaia DR3 4272588356022299520 * 18 35 52.4987340277 -00 05 13.261472240           ~ 1 0
47 Gaia DR3 4076568861833452160 * 18 42 09.0586615931 -24 30 06.377767325           ~ 1 0
48 Gaia DR3 4260141158544875008 * 18 42 45.8546710381 -01 23 05.955904178           ~ 1 0
49 ZTF J184815.96+040524.1 LP* 18 48 15.9670926866 +04 05 24.149842699       16.014   ~ 3 0
50 * bet Lyr SB* 18 50 04.7951442356 +33 21 45.600371200 2.85 3.42 3.42 3.31 3.29 B8.5Ib-II 955 0
51 V* V4332 Sgr CV* 18 50 36.6958376520 -21 23 28.925017944         14.37 K8/M0e 194 0
52 2MASS J19074498+2021005 LP? 19 07 44.9758567042 +20 21 00.505305281           ~ 2 0
53 HD 181231 Be* 19 19 42.3695906832 -00 02 59.483615784   8.79 8.58     B5III 33 0
54 2MASS J19204832+1829439 LP? 19 20 48.3249301599 +18 29 43.967236603           ~ 2 0
55 2MASS J19285259+1453131 LP? 19 28 52.5876941947 +14 53 13.071182573           ~ 2 0
56 V* CK Vul CV* 19 47 37.9577343864 +27 18 41.792401368           ~ 159 0
57 ATO J298.5404+27.3945 V* 19 54 09.7070186401 +27 23 40.586804202       15.343   ~ 2 0
58 BD+08 4269 * 19 55 37.9592645472 +08 57 44.253600120   10.03 9.59     A2 3 0
59 Gaia DR3 2030965725082217088 * 20 00 21.2089448230 +31 37 44.597351201           ~ 1 0
60 Gaia DR3 2074693061975359232 Em* 20 11 44.9785033921 +41 46 55.954557885           ~ 2 0
61 ATO J303.4874+37.5023 EB* 20 13 56.9862308317 +37 30 08.486000257       15.236   ~ 4 0
62 Kiso J201910.15+381754.9 EB* 20 19 10.1389817734 +38 17 54.820223124           ~ 6 0
63 Gaia DR3 2054338249889402880 Em* 20 20 30.7912951923 +32 34 04.563823155           ~ 2 0
64 Gaia DR3 2083649030845658624 * 20 31 30.3577430484 +47 58 41.641715528           ~ 1 0
65 ATO J312.6099+46.0179 EB* 20 50 26.3814716453 +46 01 04.797723884       15.169   ~ 5 0
66 Gaia DR3 1870955515858422656 * 20 51 39.2805168058 +37 34 12.513627697           ~ 1 0
67 Gaia DR3 2169083008475385856 * 21 08 24.3142701768 +50 11 57.153928742           ~ 1 0
68 Gaia DR3 2175699216614191360 Em* 21 17 13.2749368592 +53 24 31.877258260           ~ 2 0
69 Gaia DR3 2164630463117114496 Em* 21 18 09.2540442016 +47 31 54.436237611           ~ 2 0
70 Gaia DR3 2173852964799716480 * 21 47 42.4798845446 +53 59 59.243820096           ~ 1 0
71 V* V2840 Cyg EB* 21 49 13.2116923416 +30 58 05.832334524   12.81 12.09     ~ 5 0
72 ZTF J221453.34+553605.1 EB* 22 14 53.3521307294 +55 36 05.117886775           ~ 4 0
73 [D75b] Em* 22-046 LP? 22 27 04.2174226776 +59 05 34.897955640           ~ 4 0
74 ATO J339.2651+57.1666 V* 22 37 03.6515585527 +57 10 00.049633068   14.221 13.412 13.147   ~ 2 0
75 ATO J341.0511+57.8325 RS* 22 44 12.2770063421 +57 49 57.105413358       15.608   ~ 4 0
76 BD+52 3283 EB* 22 45 13.7972027352 +53 12 33.747922512   9.92 9.77     B3e 8 0
77 Gaia DR3 2013187240507011456 Em* 22 54 36.5334466079 +58 03 23.640542382           ~ 2 0

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