2011ApJ...741L..36M


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.06CET00:52:29

2011ApJ...741L..36M - Astrophys. J., 741, L36 (2011/November-2)

Concerning the classical cepheid VIC Wesenheit function's strong metallicity dependence.

MAJAESS D., TURNER D. and GIEREN W.

Abstract (from CDS):

Evidence is presented which supports findings that the classical Cepheid VIC period Wesenheit function is relatively insensitive to metallicity. The viability of a recently advocated strong metallicity dependence was evaluated by applying the proposed correction (γ = -0.8 mag/dex) to distances established for the Magellanic Clouds via a Galactic VIC Wesenheit calibration, which is anchored to 10 nearby classical Cepheids with measured Hubble Space Telescope (HST) parallaxes. The resulting γ-corrected distances for the Magellanic Clouds (e.g., Small Magellanic Cloud, µ_0, γ_∼ 18.3) are in significant disagreement with that established from a mean of >300 published estimates (NED-D), and a universal Wesenheit template featuring 11 δ Scuti, SX Phe, RR Lyrae, and Type II Cepheid variables with HST/Hipparcos parallaxes. Conversely, adopting a null correction (i.e., γ = 0 mag/dex) consolidates the estimates. In tandem with existing evidence, the results imply that variations in chemical composition among Cepheids are a comparatively negligible source of uncertainty for-based extragalactic distances and determinations of H0. A new approach is described which aims to provide additional Galactic Cepheid calibrators to facilitate subsequent assessments of the VIC Wesenheit function's relative (in) sensitivity to abundance changes. VVV/UKIDSS/Two Micron All Sky Survey JHKs photometry for clusters in spiral arms shall be employed to establish a precise galactic longitude-distance relation, which can be applied in certain cases to determine the absolute Wesenheit magnitudes for younger Cepheids.

Abstract Copyright:

Journal keyword(s): distance scale - galaxies: distances and redshifts - stars: variables: Cepheids

CDS comments: IC 4128 is a misprint for IC 4182.

Simbad objects: 32

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Number of rows : 32

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 V* DL Cas cC* 00 29 58.5886100054 +60 12 43.069687745 10.66 9.88 8.63   7.582 G1Ib-IIHdel-1 306 0
2 NGC 129 OpC 00 30 00 +60 13.1   7.33 6.5     ~ 183 0
3 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9710 1
4 IC 1613 GiC 01 04 54.2 +02 08 00   10.42 10.01 9.77   ~ 1122 2
5 M 33 GiG 01 33 50.904 +30 39 35.79 6.17 6.27 5.72     ~ 5253 1
6 V* SU Cas cC* 02 51 58.7508894403 +68 53 18.601570075 6.92 6.44 5.80     F5.5III+ 412 1
7 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 5868 1
8 NGC 1309 GiG 03 22 06.5558186281 -15 23 59.793798444   12.08   12.5 11.7 ~ 191 0
9 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 15214 1
10 * bet Dor cC* 05 33 37.5125319201 -62 29 23.323100433 5.13 4.58 3.76 3.55 3.12 F8/G0Ib 352 0
11 SN 1987A SN* 05 35 28.020 -69 16 11.07           SNIIpec 4563 2
12 * 48 Aur cC* 06 28 34.0875086 +30 29 34.914168 6.73 6.23 5.55   4.777 F5.5-G0Ib 365 0
13 * zet Gem cC* 07 04 06.5307903 +20 34 13.073871 5.20 4.58 3.79   3.082 G1Ib 541 0
14 V* SZ Vel LP* 09 50 07.4028271209 -44 39 07.565208377   10.68 9.36     M5 12 0
15 NGC 3021 GiG 09 50 57.1458788689 +33 33 12.942434723   12.6       ~ 166 0
16 NAME Car Arm PoG 10 00 -60.0           ~ 385 1
17 V* RY Vel cC* 10 20 41.0317627466 -55 19 17.035924264   9.71 7.86   6.840 F5Ib/II 134 0
18 M 106 Sy2 12 18 57.620 +47 18 13.39   9.14 8.41 8.11   ~ 2172 3
19 IC 4182 BiC 13 05 48.7470958923 +37 36 13.015792630   11.86   11.40   ~ 322 1
20 NGC 5253 AGN 13 39 55.990 -31 38 24.11 11.48 10.94 10.49 10.33   ~ 1282 4
21 M 101 GiP 14 03 12.583 +54 20 55.50   8.46 7.86 7.76   ~ 2604 2
22 Cl Lynga 6 OpC 16 04 52 -51 56.0   10.28 9.5     ~ 74 0
23 V* TW Nor cC* 16 04 55.2266686530 -51 57 12.652767620   13.67 11.17     ~ 144 0
24 V* X Sgr cC* 17 47 33.6241002643 -27 49 50.848981593 5.84 5.34 4.54 6.03 3.661 F7II 314 0
25 * gam01 Sgr cC* 18 05 01.2265190154 -29 34 48.303215344 5.99 5.47 4.69   3.869 G0Ib/II 331 0
26 V* Y Sgr cC* 18 21 22.9864295 -18 51 36.001763 7.31 6.69 5.75   4.810 F8II 274 0
27 M 54 GlC 18 55 03.33 -30 28 47.5           ~ 933 0
28 V* FF Aql cC* 18 58 14.7482217777 +17 21 39.295590199 6.61 6.18 5.38     F6Ib 347 0
29 NGC 6822 G 19 44 56.199 -14 47 51.29   18 8.1     ~ 1453 0
30 V* T Vul cC* 20 51 28.2382502598 +28 15 01.816605372 6.89 6.49 5.77   5.061 F5Ib+A0.8V 324 0
31 * del Cep cC* 22 29 10.2650184 +58 24 54.713856 4.71 4.35 3.75   3.219 F5Iab:+B7-8 688 0
32 NAME Local Group GrG ~ ~           ~ 7188 0

    Equat.    Gal    SGal    Ecl

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2021.03.06-00:52:29

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