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

Research output: Contribution to journal › Article › peer-review

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)
Pages (from-to)	341-346
Number of pages	6
Journal	Astrophysics and Space Science Proceedings
Issue number	202409
DOIs	https://doi.org/10.1007/978-1-4020-5573-7_58
State	Published - 2007
Externally published	Yes

Keywords

Dust
Extinction
Galaxies: ISM
Galaxies: Structure
Infrared: Galaxies

ASJC Scopus subject areas

Physics and Astronomy(all)
Computer Science Applications
Spectroscopy
Space and Planetary Science
Nuclear and High Energy Physics

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

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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. Astrophysics and Space Science Proceedings, (202409), 341-346. https://doi.org/10.1007/978-1-4020-5573-7_58

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', Astrophysics and Space Science Proceedings, no. 202409, pp. 341-346. https://doi.org/10.1007/978-1-4020-5573-7_58

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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.}",

year = "2007",

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

language = "English (US)",

pages = "341--346",

journal = "Astrophysics and Space Science Proceedings",

issn = "1570-6591",

number = "202409",

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TY - JOUR

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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UR - http://www.scopus.com/inward/citedby.url?scp=85033661360&partnerID=8YFLogxK

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

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

M3 - Article

AN - SCOPUS:85033661360

SN - 1570-6591

SP - 341

EP - 346

JO - Astrophysics and Space Science Proceedings

JF - Astrophysics and Space Science Proceedings

IS - 202409

ER -

Sings observations of spiral galaxies evidence for secular evolution

Abstract

Keywords

ASJC Scopus subject areas

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