THE THICK DISK IN THE GALAXY NGC 4244 FROM S4G IMAGING

被引：37

作者：

Comeron, Sebastien ^{[1
,2
]}

Knapen, Johan H. ^{[2
,3
]}

Sheth, Kartik ^{[4
,5
,6
]}

Regan, Michael W. ^{[7
]}

Hinz, Joannah L. ^{[8
]}

Gil de Paz, Armando ^{[9
]}

Menendez-Delmestre, Karin ^{[10
]}

Munoz-Mateos, Juan-Carlos ^{[9
]}

Seibert, Mark ^{[10
]}

Kim, Taehyun ^{[11
]}

Athanassoula, E. ^{[12
]}

Bosma, Albert ^{[12
]}

Buta, Ronald J. ^{[13
]}

Elmegreen, Bruce G. ^{[14
]}

Ho, Luis C. ^{[10
]}

Holwerda, Benne W. ^{[15
]}

Laurikainen, Eija ^{[16
,17
]}

Salo, Heikki ^{[16
]}

Schinnerer, Eva ^{[18
]}

机构：

[1] Korea Astron & Space Sci Inst, Taejon 305348, South Korea

[2] Inst Astrofis Canarias, E-38200 San Cristobal la Laguna, Spain

[3] Univ La Laguna, Dept Astrofis, E-38205 Tenerife, Spain

[4] Natl Radio Astron Observ NAASC, Charlottesville, VA 22903 USA

[5] Spitzer Sci Ctr, Pasadena, CA 91125 USA

[6] CALTECH, Pasadena, CA 91125 USA

[7] Space Telescope Sci Inst, Baltimore, MD 21218 USA

[8] Univ Arizona, Steward Observ, Tucson, AZ 85721 USA

[9] Univ Complutense Madrid, Dept Astrofis, E-28040 Madrid, Spain

[10] Observ Carnegie Inst Washington, Pasadena, CA 91101 USA

[11] Seoul Natl Univ, Astron Program, Dept Phys & Astron, Seoul 151742, South Korea

[12] Univ Aix Marseille 1, CNRS, LAM, UMR6110, F-13388 Marseille 20, France

[13] Univ Alabama, Dept Phys & Astron, Tuscaloosa, AL 35487 USA

[14] IBM Corp, TJ Watson Res Ctr, Yorktown Hts, NY 10598 USA

[15] Univ Cape Town, Dept Astron, ACGC, ZA-7700 Rondebosch, South Africa

[16] Univ Oulu, Dept Phys Sci, Astron Div, FIN-90014 Oulu, Finland

[17] Univ Turku, Finnish Ctr Astron ESO FINCA, FI-21500 Piikkio, Finland

[18] Max Planck Inst Astron, D-69117 Heidelberg, Germany

来源：

ASTROPHYSICAL JOURNAL | 2011年 / 729卷 / 01期

关键词：

galaxies: individual (NGC 4244); galaxies: photometry; galaxies: spiral; galaxies: structure; ON SPIRAL GALAXIES; TELESCOPE ADVANCED CAMERA; SURFACE-PHOTOMETRY; H-ALPHA; GALACTIC DISCS; EVOLUTION; GAS; NGC-4244; DECOMPOSITION; SIMULATIONS;

D O I：

10.1088/0004-637X/729/1/18

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

If thick disks are ubiquitous and a natural product of disk galaxy formation and/or evolution processes, all undisturbed galaxies that have evolved during a significant fraction of a Hubble time should have a thick disk. The late-type spiral galaxy NGC 4244 has been reported as the only nearby edge-on galaxy without a confirmed thick disk. Using data from the Spitzer Survey of Stellar Structure in Galaxies (S(4)G) we have identified signs of two disk components in this galaxy. The asymmetries between the light profiles on both sides of the mid-plane of NGC 4244 can be explained by a combination of the galaxy not being perfectly edge-on and a certain degree of opacity of the thin disk. We argue that the subtlety of the thick disk is a consequence of either a limited secular evolution in NGC 4244, a small fraction of stellar material in the fragments which built the galaxy, or a high amount of gaseous accretion after the formation of the galaxy.

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页数：12

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