2025A&A...697A..30N

Query : 2025A&A...697A..30N

2025A&A...697A..30N - Astronomy and Astrophysics, volume 697A30 (2025/5-1)

Period-luminosity relations for Galactic Type II Cepheids in the Sloan bands.

NARLOCH W., HAJDU G., PIETRZYNSKI G., WIELGORSKI P., SMOLEC R., GIEREN W., ZGIRSKI B., GORSKI M., KARCZMAREK P. and GRACZYK D.

Abstract (from CDS):

Context. Type II Cepheids (T2Ceps), alongside RR Lyrae stars, serve as important distance indicators for old Population II stars due to their period-luminosity (PL) relations. However, few studies of these relations in the Sloan photometric system have been conducted.
Aims. Our goal is to calibrate PL relations (and their counterparts in Wesenheit magnitudes) in the Sloan-Pan-STARRS gP1rP1iP1 bands for Galactic T2Ceps located in the vicinity of the Sun.
Methods. We collected data for 16 T2Ceps of the BL Her-type and 17 of the W Vir-type using 40 cm telescopes of the Las Cumbres Observatory Global Telescope Network. Geometric parallaxes were adopted from Gaia Data Release 3.
Results. We have calibrated PL and period-Wesenheit relations for Milky Way BL Her and W Vir stars in the solar neighborhood, as well as for a combined sample of the two types.
Conclusions. The relationships derived here will allow the determination of the distances to the T2Ceps that will be discovered by the Legacy Survey of Space and Time survey and, in turn, to probe the extended halo of the Milky Way, as well as the halos of nearby galaxies. To the best of our knowledge, the relations derived in this study are the first for Milky Way T2Ceps in the Sloan bands.

Abstract Copyright: © The Authors 2025

Journal keyword(s): stars: distances - stars: variables: Cepheids - solar neighborhood

VizieR on-line data: <Available at CDS (J/A+A/697/A30): stars.dat lc/*>

Status at CDS : Tables of objects will be appraised for possible ingestion in SIMBAD.

Simbad objects: 46

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Number of rows : 46
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 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
2 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7988 0
3 V* SW Tau WV* 04 24 32.9729044632 +04 07 24.080336400   10.23 9.33     A7 120 0
4 V* RV Tau RV* 04 47 06.7239850584 +26 10 45.532913268   11.00 9.80     K3Ibe 297 1
5 V* VZ Tau WV* 05 05 14.2594681920 +21 45 48.918218940   12.74 12.16 12.32   M4 16 0
6 V* ST Pup pA* 06 48 56.4136156056 -37 16 33.338192304   10.47 9.28 9.89 9.29 G2I 98 0
7 V* V606 Pup WV* 07 28 44.7946356120 -44 28 16.745529756   11.87 11.29     ~ 9 0
8 V* CO Pup WV* 08 26 11.9557975008 -30 17 08.330493228   11.86 10.74     ~ 32 0
9 V* VY Pyx WV* 08 54 29.6304994464 -23 31 18.574555548   7.80 7.24     F3/5III 43 0
10 V* DD Vel WV* 09 12 09.6339360120 -50 22 33.613290300     12.36     ~ 41 0
11 V* HQ Car WV* 10 20 31.9897441488 -61 14 57.416490636   12.50 11.7   11.292 ~ 35 0
12 V* W Vir WV* 13 26 01.9928807928 -03 22 43.431062880   10.33 9.46 9.29 9.393 F2Ibe 320 0
13 M 3 GlC 13 42 11.62 +28 22 38.2     6.39     ~ 2593 0
14 Cl* NGC 5272 SAW V154 RR* 13 42 11.6426734116 +28 22 13.652650588     12.9     F9 29 0
15 V* HQ Cen WV* 13 52 51.2598942864 -56 29 22.768420488   12.93 11.98     ~ 8 0
16 V* AL Vir WV* 14 11 09.0461976912 -13 18 38.439874440   10.13 9.10     F3/5III 91 0
17 HD 129981 WV* 14 46 33.6355780248 -32 10 15.265235964   8.92 8.27 9.14   G5I/IIIpCH 110 0
18 V* RT TrA WV* 16 34 30.8919954072 -63 08 00.814602012   10.42 9.70     G2Ib-II: 67 0
19 V* V439 Oph WV* 17 43 33.2732545608 +03 35 36.069357264   13.46 12.25     ~ 39 0
20 V* V465 Oph cC* 17 52 07.4617078872 -01 05 07.277966664   14.30 13.42 13.58   ~ 33 0
21 V* MR Ara WV* 17 56 41.0168407248 -45 46 24.338971524   11.83 11.04     F6 18 0
22 V* V477 Oph WV* 17 59 08.1631779360 +05 38 26.222126604   13.70       ~ 30 0
23 V* BL Her WV* 18 01 09.2240599584 +19 14 56.696475012   10.54 9.70     F0 182 0
24 V* RS Pav WV* 18 07 22.0062063432 -58 57 42.045122232   11.36 10.10     Ke 31 0
25 V* BH Oph WV* 18 15 50.5427626872 +12 05 44.083532184   12.29 11.84     F7.2e 31 0
26 V* V741 Sgr WV* 18 20 46.0560303360 -29 48 46.736205912   13.02     10.912 ~ 13 0
27 V* V2022 Sgr WV* 18 40 38.9706536364 -25 22 49.960070263   14.475 13.578 13.264 12.516 ~ 16 0
28 V* CO Sct cC* 18 43 26.1067863264 -10 44 27.313456344   15.01     12.296 ~ 16 0
29 V* FI Sct cC* 18 46 19.1593325088 -06 34 06.675344328   14.86     12.291 C 12 0
30 V* AP Her WV* 18 50 27.7290127008 +15 56 24.669429612 12.09 11.33 10.87     F2Ib/II 69 0
31 V* AX Tel WV* 18 52 49.1288478192 -56 40 31.798711812   12.70 12.24     ~ 7 0
32 V* VZ Aql WV* 19 05 02.9644174800 -06 50 58.611417504   13.80     12.607 ~ 42 0
33 V* V410 Sgr cC* 19 06 03.1381410720 -18 25 41.657235060         11.78 F6 28 0
34 V* NW Lyr WV* 19 15 56.3444420064 +34 27 08.108273484   13.03 12.22     ~ 35 0
35 V* AL Lyr WV* 19 19 29.6172143976 +27 33 44.438357556   12.95 11.98     ~ 26 0
36 V* V971 Aql WV* 19 26 04.7926863624 -10 54 30.937223304   12.47 11.84     ~ 28 0
37 V* V1711 Sgr RV* 20 01 07.9860343992 -30 30 38.905165224   11.31 10.62 10.51   F6CH+2 52 0
38 V* V572 Aql cC* 20 02 32.6873653728 +00 42 50.052585204   11.70 11.01     ~ 38 0
39 V* TW Cap RV* 20 14 28.4158961112 -13 50 07.884309192   11.660 10.862 10.292   F4Ib 79 0
40 V* BX Del WV* 20 21 18.9701299392 +18 26 16.298607264   12.35 11.99     F5 48 0
41 V* FM Del WV* 20 33 44.2573300032 +16 16 17.525671968           F6.5 20 0
42 V* TX Del WV* 20 50 12.6952830192 +03 39 08.360890416   9.95 8.84     F8 107 0
43 V* QX Aqr WV* 21 14 06.0232628160 +00 19 12.163646460     12.23 11.73   ~ 9 0
44 V* AU Peg WV* 21 24 00.2421322416 +18 16 43.777873164   9.993 9.355 9.203   F8 111 0
45 V* FY Aqr WV* 22 16 34.9708781664 -03 48 55.417187952   12.27 12.12     ~ 15 0
46 NAME Galactic Bulge reg ~ ~           ~ 4794 0

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