2010A&A...520A..58I


Query : 2010A&A...520A..58I

2010A&A...520A..58I - Astronomy and Astrophysics, volume 520, A58-58 (2010/9-2)

The 400d galaxy cluster survey weak lensing programme. I. MMT/Megacam analysis of CL0030+2618 at z = 0.50.

ISRAEL H., ERBEN T., REIPRICH T.H., VIKHLININ A., HILDEBRANDT H., HUDSON D.S., McLEOD B.A., SARAZIN C.L., SCHNEIDER P. and ZHANG Y.-Y.

Abstract (from CDS):

Studying cosmological structure formation provides insights into all of the universe's components: baryonic matter, dark matter, and, notably, dark energy. Measuring the mass function of galaxy clusters at high redshifts is particularly useful probe for both learning about the history of structure formation and constraining cosmological parameters. We attempt to derive reliable masses for a high-redshift, high-luminosity sample of galaxy clusters selected from the 400d X-ray selected cluster survey. Weak gravitational lensing allows us to determine masses that can be compared with those inferred from X-rays, forming an independent test. We focus on a particular object, CL0030+2618 at z=0.50. Using deep imaging in three passbands acquired using the Megacam instrument at MMT, we show that Megacam is well-suited to measuring gravitational shear, i.e., the shapes of faint galaxies. A catalogue of background galaxies is constructed by analysing the photometric properties of galaxies in the g'r'i' bands. Using the aperture mass technique, we detect the weak lensing signal of CL0030+2618 at 5.8σ significance. We find significant tangential alignment of galaxies out to ∼10' or a distance of >2r200 from the cluster centre. The weak lensing centre of CL0030+2618 agrees with several X-ray measurements and the position of the brightest cluster galaxy. Finally, we infer a weak lensing virial mass of M200=7.2+3.6+2.3–2.9–2.5x1014M for CL0030+2618. Despite complications caused by a tentative foreground galaxy group along the line of sight, the X-ray and weak lensing estimates for CL0030+2618 are in remarkable agreement.

Abstract Copyright:

Journal keyword(s): galaxies: clusters: general - galaxies: clusters: individual: CL0030+2618 - cosmology: observations - gravitational lensing: weak - X-rays: galaxies: clusters

Nomenclature: Fig. 1, Table 2: [IER2010] GN (Nos G1-G4). Fig. 8, Table 4: [IER2010] PNN (Nos P1-P10). Fig. 1, Paragr. 5.4: [IER2010] JHHMMSS.s+DDMMSS N=2.

Simbad objects: 23

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Number of rows : 23
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 [IER2010] P3 ? 00 29 31 +26 26.0           ~ 1 0
2 [IER2010] P5 ? 00 29 49.0 +26 15 20           ~ 1 0
3 [IER2010] J003032.7+261805 LeI 00 30 32.7 +26 18 05           ~ 1 0
4 ClG J0030+2618 ClG 00 30 33.6 +26 18 16           ~ 58 0
5 [BWE97] J003034.0+261808 BiC 00 30 34.032 +26 18 09.15           ~ 3 0
6 [IER2010] G3 G 00 30 36.3 +26 19 20           ~ 1 0
7 [IER2010] J003036.5+261914 LeI 00 30 36.5 +26 19 14           ~ 1 0
8 [IER2010] G2 G 00 30 37.9 +26 18 18           ~ 1 0
9 2MASS J00303950+2620553 Sy1 00 30 39.5155643856 +26 20 55.387577220   17.3       ~ 12 0
10 [IER2010] P10 ? 00 30 51.0 +26 07 30           ~ 1 0
11 [IER2010] P6 ? 00 30 54 +26 23.0           ~ 1 0
12 [IER2010] P1 ? 00 31 02.0 +26 26 30           ~ 1 0
13 [VV2000] J003108.4+262056 QSO 00 31 08.234 +26 20 54.76     19.10     ~ 5 0
14 [IER2010] P8 ? 00 31 09.0 +26 13 20           ~ 1 0
15 [IER2010] P7 ? 00 31 10.0 +26 21 15           ~ 1 0
16 [IER2010] P9 ? 00 31 14.0 +26 10 30           ~ 1 0
17 [IER2010] P4 ? 00 31 17 +26 18.0           ~ 1 0
18 BD+25 65 * 00 31 18.6878457552 +26 28 40.923253848   10.52 9.50     K5 3 0
19 [IER2010] P2 ? 00 31 19.0 +26 25 00           ~ 1 0
20 HD 12134 * 01 59 10.3365192912 +00 30 24.891495912   8.62 8.26     F0V 21 0
21 ClG J0159+0030 ClG 01 59 18.2 +00 30 09           ~ 29 0
22 ClG J0230+1836 ClG 02 30 26.6 +18 36 22           ~ 18 0
23 ZwCl 0806+2822 ClG 08 09 41.0 +28 11 58           ~ 23 0

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2022.12.02-13:46:40

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