2012ApJ...753..144M

Query : 2012ApJ...753..144M

2012ApJ...753..144M - Astrophys. J., 753, 144 (2012/July-2)

Anchoring the distance scale via X-Ray/Infrared data for cepheid clusters: SU Cas.

MAJAESS D., TURNER D.G., GALLO L., GIEREN W., BONATTO C., LANE D.J., BALAM D. and BERDNIKOV L.

Abstract (from CDS):

New X-ray (XMM-Newton) and JHKs(Observatoire du Mont-Mégantic) observations for members of the star cluster Alessi 95, which Turner et al. discovered hosts the classical Cepheid SU Cas, were used in tandem with UCAC3 (proper motion) and Two Micron All Sky Survey observations to determine precise cluster parameters: E(J - H) = 0.08±0.02 and d = 405±15 pc. The ensuing consensus among cluster, pulsation, and trigonometric distances (d = 414 ± 5(σ{dot}xi) ± 10(σ) pc) places SU Cas in a select group of nearby fundamental Cepheid calibrators (δ Cep, ζ Gem). High-resolution X-ray observations may be employed to expand that sample as the data proved pertinent for identifying numerous stars associated with SU Cas. Acquiring X-ray observations of additional fields may foster efforts to refine Cepheid calibrations used to constrain H0.

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Journal keyword(s): Hertzsprung-Russell and C-M diagrams - infrared: stars - open clusters and associations: general - stars: variables: Cepheids - X-rays: stars

Simbad objects: 16

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Number of rows : 16
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 * alf UMi cC* 02 31 49.09456 +89 15 50.7923 3.00 2.62 2.02 1.53 1.22 F8Ib 716 2
2 V* SU Cas cC* 02 51 58.7511911208 +68 53 18.606894036 6.92 6.44 5.80     F5.5III+ 444 1
3 Cl Alessi 95 Cl* 02 52 15.1 +68 53 19           ~ 11 0
4 BD+68 201 * 02 53 25.5388454424 +68 45 02.855167920   9.82 9.69     B8 22 0
5 * alf Per V* 03 24 19.3700924 +49 51 40.245455 2.64 2.27 1.79     F5Ib 870 1
6 Cl Melotte 22 OpC 03 46 38.0 +24 10 41           ~ 3679 0
7 Cl Melotte 25 OpC 04 30 27.4 +16 46 43           ~ 3309 0
8 * bet Dor cC* 05 33 37.5159729864 -62 29 23.376457680 5.13 4.58 3.76 3.55 3.12 F8/G0Ib 401 0
9 * zet Gem cC* 07 04 06.5312384690 +20 34 13.074474962 5.20 4.58 3.79   3.082 G1Ib 596 0
10 NGC 2451 Cl* 07 45.4 -37 58           ~ 165 1
11 NGC 2632 OpC 08 39 58.4 +19 36 33           ~ 1733 0
12 IC 2391 OpC 08 41 17.5 -53 03 00           ~ 871 0
13 NGC 3404 EmG 10 50 17.9811573624 -12 06 31.142976300   14.49       ~ 45 0
14 NAME Coma Dwarf Galaxy G 12 26 59.0 +23 54 15     14.1     ~ 482 1
15 * del Cep B * 22 29 09.2466864624 +58 24 14.747232924 5.95 6.28 6.30     B7IV 161 0
16 * del Cep cC* 22 29 10.2626640314 +58 24 54.697613650 4.71 4.35 3.75   3.219 F5Iab:+B7-8 763 0

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