Sings observations of spiral galaxies evidence for secular evolution

Michael Regan; Michele D. Thornley; Stuart N. Vogel; Kartik Sheth; Bruce T. Draine; David J. Hollenbach; Martin Meyer; Daniel A. Dale; Charles W. Engelbracht; Robert C. Kennicutt; Lee Armus; Daniela Calzetti; Karl D. Gordon; George Helou; Claus Leitherer; Sangeeta Malhotra; George H. Rieke; Marcia J. Rieke

doi:10.1007/978-1-4020-5573-7_58

Sings observations of spiral galaxies evidence for secular evolution

Michael Regan, Michele D. Thornley, Stuart N. Vogel, Kartik Sheth, Bruce T. Draine, David J. Hollenbach, Martin Meyer, Daniel A. Dale, Charles W. Engelbracht, Robert C. Kennicutt, Lee Armus, Daniela Calzetti, Karl D. Gordon, George Helou, Claus Leitherer, Sangeeta Malhotra, George H. Rieke, Marcia J. Rieke

Astrophysical Sciences

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

One process in the secular evolution of galaxies is the formation of pseudo-bulges. The formation of these pseudo-bulges requires the inflow of gas to smaller radii. If the inflow rate is faster than the rate of star formation, a central concentration of gas will form. In this paper we present radial profiles of stellar and 8 micron emission from Polycyclic Aromatic Hydrocarbons (PAHs) for 11 spiral galaxies to investigate whether the interstellar medium in these galaxies contains a central concentration above that expected from the exponential disk. We find that in five of the 11 galaxies there is a central excess in the 8 micron and CO emission above the inner extrapolation of an exponential disk. In particular, all four barred galaxies in the sample have strong central excesses in both 8 micron and CO emission. This correlation suggests that the excess seen in the CO profiles is, in general, not simply due to a radial increase in the CO emissivity.

Original language	English (US)
Title of host publication	Astrophysics and Space Science Proceedings
Editors	R.S. De Jong
Publisher	Springer Science and Business Media B.V.
Pages	341-346
Number of pages	6
ISBN (Electronic)	9781402055737
ISBN (Print)	9780387727677, 9780387876207, 9781402055720, 9781402055720, 9781402069321, 9781402088674, 9781402091896, 9781441981608, 9781441983688, 9783540758259, 9783642033230, 9783642103216, 9783642103513, 9783642113406, 9783642172502, 9789048133994, 9789048134984
DOIs	https://doi.org/10.1007/978-1-4020-5573-7_58
State	Published - 2007
Event	International Conference on Island Universe: Structure and Evolution of Disk Galaxies, 2005 - Terschelling, Netherlands Duration: Jul 3 2005 → Jul 5 2005

Publication series

Name	Astrophysics and Space Science Proceedings
Volume	0
ISSN (Print)	1570-6591
ISSN (Electronic)	1570-6605

Other

Other	International Conference on Island Universe: Structure and Evolution of Disk Galaxies, 2005
Country/Territory	Netherlands
City	Terschelling
Period	7/3/05 → 7/5/05

All Science Journal Classification (ASJC) codes

General Physics and Astronomy
Computer Science Applications
Spectroscopy
Space and Planetary Science
Nuclear and High Energy Physics

Keywords

Dust
Extinction
Galaxies: ISM
Galaxies: Structure
Infrared: Galaxies

Access to Document

10.1007/978-1-4020-5573-7_58

Cite this

Regan, M., Thornley, M. D., Vogel, S. N., Sheth, K., Draine, B. T., Hollenbach, D. J., Meyer, M., Dale, D. A., Engelbracht, C. W., Kennicutt, R. C., Armus, L., Calzetti, D., Gordon, K. D., Helou, G., Leitherer, C., Malhotra, S., Rieke, G. H., & Rieke, M. J. (2007). Sings observations of spiral galaxies evidence for secular evolution. In R. S. De Jong (Ed.), Astrophysics and Space Science Proceedings (pp. 341-346). (Astrophysics and Space Science Proceedings; Vol. 0). Springer Science and Business Media B.V.. https://doi.org/10.1007/978-1-4020-5573-7_58

@inproceedings{c0f559fc529f4ca8b336ebf6c575a426,

title = "Sings observations of spiral galaxies evidence for secular evolution",

abstract = "One process in the secular evolution of galaxies is the formation of pseudo-bulges. The formation of these pseudo-bulges requires the inflow of gas to smaller radii. If the inflow rate is faster than the rate of star formation, a central concentration of gas will form. In this paper we present radial profiles of stellar and 8 micron emission from Polycyclic Aromatic Hydrocarbons (PAHs) for 11 spiral galaxies to investigate whether the interstellar medium in these galaxies contains a central concentration above that expected from the exponential disk. We find that in five of the 11 galaxies there is a central excess in the 8 micron and CO emission above the inner extrapolation of an exponential disk. In particular, all four barred galaxies in the sample have strong central excesses in both 8 micron and CO emission. This correlation suggests that the excess seen in the CO profiles is, in general, not simply due to a radial increase in the CO emissivity.",

keywords = "Dust, Extinction, Galaxies: ISM, Galaxies: Structure, Infrared: Galaxies",

author = "Michael Regan and Thornley, {Michele D.} and Vogel, {Stuart N.} and Kartik Sheth and Draine, {Bruce T.} and Hollenbach, {David J.} and Martin Meyer and Dale, {Daniel A.} and Engelbracht, {Charles W.} and Kennicutt, {Robert C.} and Lee Armus and Daniela Calzetti and Gordon, {Karl D.} and George Helou and Claus Leitherer and Sangeeta Malhotra and Rieke, {George H.} and Rieke, {Marcia J.}",

note = "Publisher Copyright: {\textcopyright} 2007, Springer Netherlands. All rights reserved.; International Conference on Island Universe: Structure and Evolution of Disk Galaxies, 2005 ; Conference date: 03-07-2005 Through 05-07-2005",

year = "2007",

doi = "10.1007/978-1-4020-5573-7_58",

language = "English (US)",

isbn = "9780387727677",

series = "Astrophysics and Space Science Proceedings",

publisher = "Springer Science and Business Media B.V.",

pages = "341--346",

editor = "{De Jong}, R.S.",

booktitle = "Astrophysics and Space Science Proceedings",

address = "Germany",

}

Regan, M, Thornley, MD, Vogel, SN, Sheth, K, Draine, BT, Hollenbach, DJ, Meyer, M, Dale, DA, Engelbracht, CW, Kennicutt, RC, Armus, L, Calzetti, D, Gordon, KD, Helou, G, Leitherer, C, Malhotra, S, Rieke, GH & Rieke, MJ 2007, Sings observations of spiral galaxies evidence for secular evolution. in RS De Jong (ed.), Astrophysics and Space Science Proceedings. Astrophysics and Space Science Proceedings, vol. 0, Springer Science and Business Media B.V., pp. 341-346, International Conference on Island Universe: Structure and Evolution of Disk Galaxies, 2005, Terschelling, Netherlands, 7/3/05. https://doi.org/10.1007/978-1-4020-5573-7_58

Sings observations of spiral galaxies evidence for secular evolution. / Regan, Michael; Thornley, Michele D.; Vogel, Stuart N. et al.
Astrophysics and Space Science Proceedings. ed. / R.S. De Jong. Springer Science and Business Media B.V., 2007. p. 341-346 (Astrophysics and Space Science Proceedings; Vol. 0).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

TY - GEN

T1 - Sings observations of spiral galaxies evidence for secular evolution

AU - Regan, Michael

AU - Thornley, Michele D.

AU - Vogel, Stuart N.

AU - Sheth, Kartik

AU - Draine, Bruce T.

AU - Hollenbach, David J.

AU - Meyer, Martin

AU - Dale, Daniel A.

AU - Engelbracht, Charles W.

AU - Kennicutt, Robert C.

AU - Armus, Lee

AU - Calzetti, Daniela

AU - Gordon, Karl D.

AU - Helou, George

AU - Leitherer, Claus

AU - Malhotra, Sangeeta

AU - Rieke, George H.

AU - Rieke, Marcia J.

PY - 2007

Y1 - 2007

N2 - One process in the secular evolution of galaxies is the formation of pseudo-bulges. The formation of these pseudo-bulges requires the inflow of gas to smaller radii. If the inflow rate is faster than the rate of star formation, a central concentration of gas will form. In this paper we present radial profiles of stellar and 8 micron emission from Polycyclic Aromatic Hydrocarbons (PAHs) for 11 spiral galaxies to investigate whether the interstellar medium in these galaxies contains a central concentration above that expected from the exponential disk. We find that in five of the 11 galaxies there is a central excess in the 8 micron and CO emission above the inner extrapolation of an exponential disk. In particular, all four barred galaxies in the sample have strong central excesses in both 8 micron and CO emission. This correlation suggests that the excess seen in the CO profiles is, in general, not simply due to a radial increase in the CO emissivity.

AB - One process in the secular evolution of galaxies is the formation of pseudo-bulges. The formation of these pseudo-bulges requires the inflow of gas to smaller radii. If the inflow rate is faster than the rate of star formation, a central concentration of gas will form. In this paper we present radial profiles of stellar and 8 micron emission from Polycyclic Aromatic Hydrocarbons (PAHs) for 11 spiral galaxies to investigate whether the interstellar medium in these galaxies contains a central concentration above that expected from the exponential disk. We find that in five of the 11 galaxies there is a central excess in the 8 micron and CO emission above the inner extrapolation of an exponential disk. In particular, all four barred galaxies in the sample have strong central excesses in both 8 micron and CO emission. This correlation suggests that the excess seen in the CO profiles is, in general, not simply due to a radial increase in the CO emissivity.

KW - Dust

KW - Extinction

KW - Galaxies: ISM

KW - Galaxies: Structure

KW - Infrared: Galaxies

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U2 - 10.1007/978-1-4020-5573-7_58

DO - 10.1007/978-1-4020-5573-7_58

M3 - Conference contribution

AN - SCOPUS:85033661360

SN - 9780387727677

SN - 9780387876207

SN - 9781402055720

SN - 9781402069321

SN - 9781402088674

SN - 9781402091896

SN - 9781441981608

SN - 9781441983688

SN - 9783540758259

SN - 9783642033230

SN - 9783642103216

SN - 9783642103513

SN - 9783642113406

SN - 9783642172502

SN - 9789048133994

SN - 9789048134984

T3 - Astrophysics and Space Science Proceedings

SP - 341

EP - 346

BT - Astrophysics and Space Science Proceedings

A2 - De Jong, R.S.

PB - Springer Science and Business Media B.V.

T2 - International Conference on Island Universe: Structure and Evolution of Disk Galaxies, 2005

Y2 - 3 July 2005 through 5 July 2005

ER -

Sings observations of spiral galaxies evidence for secular evolution

Abstract

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All Science Journal Classification (ASJC) codes

Keywords

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