Unusual PAH emission in elliptical galaxies

被引：0
|
作者：
Bregman, Jesse D. [1 ]
Bregman, Joel N. [2 ]
Temi, Pasquale [1 ,3 ,4 ]
机构：
[1] NASA, Ames Res Ctr, Astrophys Branch, MS 245-6, Moffett Field, CA 94035 USA
[2] Univ Michigan, Dept Astron, Ann Arbor, MI 48109 USA
[3] SETI Inst, Mountain View, CA 94043 USA
[4] Univ Western Ontario, Dept Phys & Astron, London, ON N6A 3K7, Canada
来源：
SECOND ANNUAL SPITZER SCIENCE CENTER CONFERENCE: INFRARED DIAGNOSTICS OF GALAXY EVOLUTION | 2008年 / 381卷
关键词：
D O I：
暂无
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
In a sample of thirty normal elliptical galaxies observed with the Spitzer IRS, one galaxy, NGC4697, shows strong PAH emission, but with an apparently weak 7.7 mu m feature. We find that the PAH emission is confined to the central regions of the galaxy and that once a quiescent elliptical galaxy spectrum is subtracted, the PAH feature ratios are normal. We show that the PAH spectrum resembles the diffuse ISM of our galaxy rather than an HII region, and is not indicative of a starburst galaxy. We suggest that the PAHs in NGC4697 are consistent with a recent but now past burst of star formation.
引用
收藏
页码：34 / +
页数：3
相关论文
共 50 条
  • [21] ELLIPTICAL GALAXIES
    BINNEY, J
    OBSERVATORY, 1985, 105 (1068): : 164 - 165
  • [22] Modelling the spectral energy distribution of galaxies V. The dust and PAH emission SEDs of disk galaxies
    Popescu, C. C.
    Tuffs, R. J.
    Dopita, M. A.
    Fischera, J.
    Kylafis, N. D.
    Madore, B. F.
    ASTRONOMY & ASTROPHYSICS, 2011, 527
  • [23] Elliptical galaxies with emission lines from the Sloan digital sky survey
    Zhao, YH
    Gu, QS
    Peng, ZX
    Shi, L
    Luo, XL
    Peng, QH
    CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS, 2006, 6 (01): : 15 - 24
  • [24] Elliptical Galaxies with Emission Lines from the Sloan Digital Sky Survey
    Ying-He Zhao Qiu-Sheng Gu Zhi-Xin Peng Lei Shi Xin-Lian Luo Qiu-He Peng Department of Astronomy
    Research in Astronomy and Astrophysics, 2006, (01) : 15 - 24
  • [25] Far-ultraviolet emission from elliptical galaxies at z=0.33
    Brown, TM
    Ferguson, HC
    Smith, E
    Bowers, CW
    Kimble, RA
    Renzini, A
    Rich, RM
    ASTROPHYSICAL JOURNAL, 2003, 584 (02): : L69 - L72
  • [26] Far-ultraviolet emission from elliptical galaxies at z=0.55
    Brown, TM
    Bowers, CW
    Kimble, RA
    Ferguson, HC
    ASTROPHYSICAL JOURNAL, 2000, 529 (02): : L89 - L93
  • [27] Cold molecular gas and PAH emission in the nuclear and circumnuclear regions of Seyfert galaxies
    Alonso-Herrero, A.
    Pereira-Santaella, M.
    Rigopoulou, D.
    Garcia-Bernete, I
    Garcia-Burillo, S.
    Dominguez-Fernandez, A. J.
    Combes, F.
    Davies, R., I
    Diaz-Santos, T.
    Esparza-Arredondo, D.
    Gonzalez-Martin, O.
    Hernan-Caballero, A.
    Hicks, E. K. S.
    Honig, S. F.
    Levenson, N. A.
    Ramos Almeida, C.
    Roche, P. F.
    Rosario, D.
    ASTRONOMY & ASTROPHYSICS, 2020, 639
  • [28] Origin of the structure difference between elliptical galaxies and dwarf elliptical galaxies
    Mori, M
    Yoshii, Y
    Nomoto, K
    NUMERICAL ASTROPHYSICS, 1999, 240 : 69 - 70
  • [29] DWARF ELLIPTICAL GALAXIES
    GEROLA, H
    CARNEVALI, P
    SALPETER, EE
    ASTROPHYSICAL JOURNAL, 1983, 268 (02): : L75 - L78
  • [30] HI in elliptical galaxies
    Sadler, EM
    PUBLICATIONS ASTRONOMICAL SOCIETY OF AUSTRALIA, 1997, 14 (01): : 45 - 47
12345