To the center of cold spot with Planck

被引：31

作者：

Gurzadyan, V. G. ^{[1
,2
,3
]}

Kashin, A. L. ^{[2
,3
]}

Khachatryan, H. ^{[2
,3
]}

Poghosian, E. ^{[2
,3
]}

Sargsyan, S. ^{[2
,3
]}

Yegorian, G. ^{[2
,3
]}

机构：

[1] Univ Roma La Sapienza, SIA, I-00185 Rome, Italy

[2] Ctr Cosmol & Astrophys, Alikhanian Natl Lab, Yerevan, Armenia

[3] Yerevan State Univ, Yerevan 375049, Armenia

来源：

ASTRONOMY & ASTROPHYSICS | 2014年 / 566卷

关键词：

cosmic background radiation; MICROWAVE; STOCHASTICITY; ORIGIN; VOIDS;

D O I：

10.1051/0004-6361/201423565

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The structure of the cold spot, of a non-Gaussian anomaly in the cosmic microwave background (CMB) sky detected earlier by Vielva et al. (2004, ApJ, 609, 22), is studied using the data by Planck satellite. The map obtained of the degree of stochasticity (K-map) of CMB for the cold spot, reveals, most clearly in 100 GHz band, a shell-type structure with a center coinciding with the minima of the temperature distribution. The shell structure is non-Gaussian at a 4 sigma confidence level. Such behavior of the K-map supports the void nature of the cold spot. The method applied can be used for tracing voids that have no signatures in redshift surveys.

引用

页数：4

共 33 条

[1]

[Арнольд Владимир Игоревич Arnol'd Vladimir Igorevich], 2008, [Успехи математических наук, Russian Mathematical Surveys, Uspekhi matematicheskikh nauk], V63, P5, DOI 10.4213/rm9191

[2]

Arnold V., 2009, FUNCT ANAL OTHER MAT, V2, P139

[3]

Arnold V.I, 2009, T MOSCOW MATH SOC, V70, P31

[4] Stochasticity: A Feature for the Structuring of Large and Heterogeneous Image Databases [J].

Atto, Abdourrahmane M. ;

Berthoumieu, Yannick ;

Megret, Remi .

ENTROPY, 2013, 15 (11) :4782-4801

[5] A redshift survey towards the cosmic microwave background cold spot [J].

Bremer, M. N. ;

Silk, J. ;

Davies, L. J. M. ;

Lehnert, M. D. .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2010, 404 (01) :L69-L73

[6]

Copi C. J., 2013, MNRAS UNPUB

[7] Detection of a non-Gaussian spot in WMAP [J].

Cruz, M ;

Martínez-González, E ;

Vielva, P ;

Cayón, L .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2005, 356 (01) :29-40

[8] CMB lensing and the WMAP cold spot [J].

Das, Sudeep ;

Spergel, David N. .

PHYSICAL REVIEW D, 2009, 79 (04)

[9] Using CMB polarization to constrain the anomalous nature of the Cold Spot with an incomplete-sky coverage [J].

Fernandez-Cobos, R. ;

Vielva, P. ;

Martinez-Gonzalez, E. ;

Tucci, M. ;

Cruz, M. .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2013, 435 (04) :3096-3102

[10] HEALPix:: A framework for high-resolution discretization and fast analysis of data distributed on the sphere [J].

Górski, KM ;

Hivon, E ;

Banday, AJ ;

Wandelt, BD ;

Hansen, FK ;

Reinecke, M ;

Bartelmann, M .

ASTROPHYSICAL JOURNAL, 2005, 622 (02) :759-771

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