Primordial (pseudo)bulges in isolated galaxies

M. Fernández Lorenzo; J. Sulentic; L. Verdes-Montenegro; J. Blasco-Herrera; M. Argudo-Fernández; P. Ramírez-Moreta; J. Garrido; J. E. Ruiz; S. Sánchez-Expósito; J. D. Santander-Vela

Primordial (pseudo)bulges in isolated galaxies

M. Fernández Lorenzo, J. Sulentic, L. Verdes-Montenegro, J. Blasco-Herrera, M. Argudo-Fernández, P. Ramírez-Moreta, J. Garrido, J. E. Ruiz, S. Sánchez-Expósito, J. D. Santander-Vela

Research output: Contribution to conference › Paper › peer-review

Abstract

Important clues about spiral galaxy formation lie in the nature of their central bulges. In this sense, properties of bulges in isolated galaxies best reflect their origin because of their minimized environmental evolutionary effects. We report here the structural parameters and (g − i) bulge/disk colors for a sample of 189 isolated galaxies selected from the AMIGA project (Analysis of the interstellar Medium of Isolated GAlaxies). A 2D bulge/disk/bar decomposition of SDSS i-band images was performed in order to identify the pseudobulges in our sample. We derived (g − i) bulge colors using aperture photometry. Pseudobulges in our sample show median colors (g − i) ∼ 1.06, while their associated disks are much bluer, (g − i) ∼ 0.77. Moreover, 64 % (113/177) of pseudobulges follow the red sequence of early-type galaxies. The bluer pseudobulges in our sample tend to be located in those galaxies more affected by the tidal interactions. The red bulge colors and low B/T values for AMIGA isolated galaxies are consistent with an early formation epoch. The results found here suggest that environment could be playing a role in rejuvenating the pseudobulges.

Original language	English
Pages	195-200
Number of pages	6
State	Published - 9 Jul 2014
Externally published	Yes
Event	11th Scientific Meeting of the Spanish Astronomical Society - Highlights of Spanish Astrophysics VIII, SEA 2014 - Teruel, Spain Duration: 8 Sep 2014 → 12 Sep 2014

Conference

Conference	11th Scientific Meeting of the Spanish Astronomical Society - Highlights of Spanish Astrophysics VIII, SEA 2014
Country/Territory	Spain
City	Teruel
Period	8/09/14 → 12/09/14

Cite this

Fernández Lorenzo, M., Sulentic, J., Verdes-Montenegro, L., Blasco-Herrera, J., Argudo-Fernández, M., Ramírez-Moreta, P., Garrido, J., Ruiz, J. E., Sánchez-Expósito, S., & Santander-Vela, J. D. (2014). Primordial (pseudo)bulges in isolated galaxies. 195-200. Paper presented at 11th Scientific Meeting of the Spanish Astronomical Society - Highlights of Spanish Astrophysics VIII, SEA 2014, Teruel, Spain.

@conference{8961e38c089a4e23a8c722c44a31504f,

title = "Primordial (pseudo)bulges in isolated galaxies",

abstract = "Important clues about spiral galaxy formation lie in the nature of their central bulges. In this sense, properties of bulges in isolated galaxies best reflect their origin because of their minimized environmental evolutionary effects. We report here the structural parameters and (g − i) bulge/disk colors for a sample of 189 isolated galaxies selected from the AMIGA project (Analysis of the interstellar Medium of Isolated GAlaxies). A 2D bulge/disk/bar decomposition of SDSS i-band images was performed in order to identify the pseudobulges in our sample. We derived (g − i) bulge colors using aperture photometry. Pseudobulges in our sample show median colors (g − i) ∼ 1.06, while their associated disks are much bluer, (g − i) ∼ 0.77. Moreover, 64 % (113/177) of pseudobulges follow the red sequence of early-type galaxies. The bluer pseudobulges in our sample tend to be located in those galaxies more affected by the tidal interactions. The red bulge colors and low B/T values for AMIGA isolated galaxies are consistent with an early formation epoch. The results found here suggest that environment could be playing a role in rejuvenating the pseudobulges.",

author = "{Fern{\'a}ndez Lorenzo}, M. and J. Sulentic and L. Verdes-Montenegro and J. Blasco-Herrera and M. Argudo-Fern{\'a}ndez and P. Ram{\'i}rez-Moreta and J. Garrido and Ruiz, {J. E.} and S. S{\'a}nchez-Exp{\'o}sito and Santander-Vela, {J. D.}",

note = "Publisher Copyright: {\textcopyright} 11th Scientific Meeting of the Spanish Astronomical Society. All rights reserved. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.; 11th Scientific Meeting of the Spanish Astronomical Society - Highlights of Spanish Astrophysics VIII, SEA 2014 ; Conference date: 08-09-2014 Through 12-09-2014",

year = "2014",

month = jul,

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Fernández Lorenzo, M, Sulentic, J, Verdes-Montenegro, L, Blasco-Herrera, J, Argudo-Fernández, M, Ramírez-Moreta, P, Garrido, J, Ruiz, JE, Sánchez-Expósito, S & Santander-Vela, JD 2014, 'Primordial (pseudo)bulges in isolated galaxies', Paper presented at 11th Scientific Meeting of the Spanish Astronomical Society - Highlights of Spanish Astrophysics VIII, SEA 2014, Teruel, Spain, 8/09/14 - 12/09/14 pp. 195-200.

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T1 - Primordial (pseudo)bulges in isolated galaxies

AU - Fernández Lorenzo, M.

AU - Sulentic, J.

AU - Verdes-Montenegro, L.

AU - Blasco-Herrera, J.

AU - Argudo-Fernández, M.

AU - Ramírez-Moreta, P.

AU - Garrido, J.

AU - Ruiz, J. E.

AU - Sánchez-Expósito, S.

AU - Santander-Vela, J. D.

PY - 2014/7/9

Y1 - 2014/7/9

N2 - Important clues about spiral galaxy formation lie in the nature of their central bulges. In this sense, properties of bulges in isolated galaxies best reflect their origin because of their minimized environmental evolutionary effects. We report here the structural parameters and (g − i) bulge/disk colors for a sample of 189 isolated galaxies selected from the AMIGA project (Analysis of the interstellar Medium of Isolated GAlaxies). A 2D bulge/disk/bar decomposition of SDSS i-band images was performed in order to identify the pseudobulges in our sample. We derived (g − i) bulge colors using aperture photometry. Pseudobulges in our sample show median colors (g − i) ∼ 1.06, while their associated disks are much bluer, (g − i) ∼ 0.77. Moreover, 64 % (113/177) of pseudobulges follow the red sequence of early-type galaxies. The bluer pseudobulges in our sample tend to be located in those galaxies more affected by the tidal interactions. The red bulge colors and low B/T values for AMIGA isolated galaxies are consistent with an early formation epoch. The results found here suggest that environment could be playing a role in rejuvenating the pseudobulges.

AB - Important clues about spiral galaxy formation lie in the nature of their central bulges. In this sense, properties of bulges in isolated galaxies best reflect their origin because of their minimized environmental evolutionary effects. We report here the structural parameters and (g − i) bulge/disk colors for a sample of 189 isolated galaxies selected from the AMIGA project (Analysis of the interstellar Medium of Isolated GAlaxies). A 2D bulge/disk/bar decomposition of SDSS i-band images was performed in order to identify the pseudobulges in our sample. We derived (g − i) bulge colors using aperture photometry. Pseudobulges in our sample show median colors (g − i) ∼ 1.06, while their associated disks are much bluer, (g − i) ∼ 0.77. Moreover, 64 % (113/177) of pseudobulges follow the red sequence of early-type galaxies. The bluer pseudobulges in our sample tend to be located in those galaxies more affected by the tidal interactions. The red bulge colors and low B/T values for AMIGA isolated galaxies are consistent with an early formation epoch. The results found here suggest that environment could be playing a role in rejuvenating the pseudobulges.

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M3 - Paper

AN - SCOPUS:85090698627

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T2 - 11th Scientific Meeting of the Spanish Astronomical Society - Highlights of Spanish Astrophysics VIII, SEA 2014

Y2 - 8 September 2014 through 12 September 2014

ER -

Primordial (pseudo)bulges in isolated galaxies

Abstract

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