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VLT spectroscopy of globular cluster systems - I: the photometric and spectroscopic data set

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VLT spectroscopy of globular cluster systems - I : the photometric and spectroscopic data set. / Puzia, T. H.; Kissler-Patig, M.; Thomas, D.; Maraston, C.; Saglia, R. P.; Bender, R.; Richtler, T.; Goudfrooij, P.; Hempel, M.

In: Astronomy and Astrophysics, Vol. 415, No. 1, 03.02.2004, p. 123-U6.

Research output: Contribution to journalArticle

Harvard

Puzia, TH, Kissler-Patig, M, Thomas, D, Maraston, C, Saglia, RP, Bender, R, Richtler, T, Goudfrooij, P & Hempel, M 2004, 'VLT spectroscopy of globular cluster systems - I: the photometric and spectroscopic data set', Astronomy and Astrophysics, vol. 415, no. 1, pp. 123-U6. https://doi.org/10.1051/0004-6361:20031448

APA

Puzia, T. H., Kissler-Patig, M., Thomas, D., Maraston, C., Saglia, R. P., Bender, R., Richtler, T., Goudfrooij, P., & Hempel, M. (2004). VLT spectroscopy of globular cluster systems - I: the photometric and spectroscopic data set. Astronomy and Astrophysics, 415(1), 123-U6. https://doi.org/10.1051/0004-6361:20031448

Vancouver

Puzia TH, Kissler-Patig M, Thomas D, Maraston C, Saglia RP, Bender R et al. VLT spectroscopy of globular cluster systems - I: the photometric and spectroscopic data set. Astronomy and Astrophysics. 2004 Feb 3;415(1):123-U6. https://doi.org/10.1051/0004-6361:20031448

Author

Puzia, T. H. ; Kissler-Patig, M. ; Thomas, D. ; Maraston, C. ; Saglia, R. P. ; Bender, R. ; Richtler, T. ; Goudfrooij, P. ; Hempel, M. / VLT spectroscopy of globular cluster systems - I : the photometric and spectroscopic data set. In: Astronomy and Astrophysics. 2004 ; Vol. 415, No. 1. pp. 123-U6.

Bibtex

@article{10f51fce0701480aa40bc03cf5c91832,
title = "VLT spectroscopy of globular cluster systems - I: the photometric and spectroscopic data set",
abstract = "We present Lick line-index measurements of extragalactic globular clusters in seven early-type galaxies (NGC 1380, 2434, 3115, 3379, 3585, 5846, and 7192) with dierent morphological types (E–S0) located in field and group/cluster environments. High-quality spectra were taken with the FORS2 instrument at ESO{\textquoteright}s Very Large Telescope. 50% of our data allows an age resolution t=t 0:3 and a metallicity resolution 0:25−0:4 dex, depending on the absolute metallicity. Globular cluster candidates are selected from deep B;V; R; I; K FORS2/ISAAC photometry with 80−100% success rate inside one eective radius. Using combined optical/near-infrared colour-colour diagrams we present a method to eciently reduce fore-/background contamination down to <10%. We find clear signs for bi-modality in the globular cluster colour distributions of NGC 1380, 3115, and 3585. The colour distributions of globular clusters in NGC 2434, 3379, 5846, and 7192 are consistent with a broad single-peak distribution. For the analysed globular cluster systems the slopes of projected radial surface density profiles, of the form Σ(R) ∼R −Γ vary between 0:8 and 2.6. Blue and red globular cluster sub-populations show similar slopes in the clearly bi-modal systems. For galaxies with single-peak globular cluster colour distributions, there is a hint that the blue cluster system seems to have a more extended radial distribution than the red one. Using globular clusters as a tracer population we determine total dynamical masses of host galaxies out to large radii (∼1:6−4:8 Reff). For the sample we find masses in the range 8:8 X1010 M⊙ up to 1:2X1012 M⊙. The line index data presented here will be used in accompanying papers of this series to derive ages, metallicities and abundance ratios. A compilation of currently available high-quality Lick index measurements for globular clusters in elliptical, lenticular, and late-type galaxies is provided and will serve to augment the current data set.",
keywords = "galaxies : star clusters, galaxies : general",
author = "Puzia, {T. H.} and M. Kissler-Patig and D. Thomas and C. Maraston and Saglia, {R. P.} and R. Bender and T. Richtler and P. Goudfrooij and M. Hempel",
note = "copyright ESO 2004",
year = "2004",
month = feb,
day = "3",
doi = "10.1051/0004-6361:20031448",
language = "English",
volume = "415",
pages = "123--U6",
journal = "Astronomy and Astrophysics",
issn = "0004-6361",
publisher = "EDP Sciences",
number = "1",

}

RIS

TY - JOUR

T1 - VLT spectroscopy of globular cluster systems - I

T2 - the photometric and spectroscopic data set

AU - Puzia, T. H.

AU - Kissler-Patig, M.

AU - Thomas, D.

AU - Maraston, C.

AU - Saglia, R. P.

AU - Bender, R.

AU - Richtler, T.

AU - Goudfrooij, P.

AU - Hempel, M.

N1 - copyright ESO 2004

PY - 2004/2/3

Y1 - 2004/2/3

N2 - We present Lick line-index measurements of extragalactic globular clusters in seven early-type galaxies (NGC 1380, 2434, 3115, 3379, 3585, 5846, and 7192) with dierent morphological types (E–S0) located in field and group/cluster environments. High-quality spectra were taken with the FORS2 instrument at ESO’s Very Large Telescope. 50% of our data allows an age resolution t=t 0:3 and a metallicity resolution 0:25−0:4 dex, depending on the absolute metallicity. Globular cluster candidates are selected from deep B;V; R; I; K FORS2/ISAAC photometry with 80−100% success rate inside one eective radius. Using combined optical/near-infrared colour-colour diagrams we present a method to eciently reduce fore-/background contamination down to <10%. We find clear signs for bi-modality in the globular cluster colour distributions of NGC 1380, 3115, and 3585. The colour distributions of globular clusters in NGC 2434, 3379, 5846, and 7192 are consistent with a broad single-peak distribution. For the analysed globular cluster systems the slopes of projected radial surface density profiles, of the form Σ(R) ∼R −Γ vary between 0:8 and 2.6. Blue and red globular cluster sub-populations show similar slopes in the clearly bi-modal systems. For galaxies with single-peak globular cluster colour distributions, there is a hint that the blue cluster system seems to have a more extended radial distribution than the red one. Using globular clusters as a tracer population we determine total dynamical masses of host galaxies out to large radii (∼1:6−4:8 Reff). For the sample we find masses in the range 8:8 X1010 M⊙ up to 1:2X1012 M⊙. The line index data presented here will be used in accompanying papers of this series to derive ages, metallicities and abundance ratios. A compilation of currently available high-quality Lick index measurements for globular clusters in elliptical, lenticular, and late-type galaxies is provided and will serve to augment the current data set.

AB - We present Lick line-index measurements of extragalactic globular clusters in seven early-type galaxies (NGC 1380, 2434, 3115, 3379, 3585, 5846, and 7192) with dierent morphological types (E–S0) located in field and group/cluster environments. High-quality spectra were taken with the FORS2 instrument at ESO’s Very Large Telescope. 50% of our data allows an age resolution t=t 0:3 and a metallicity resolution 0:25−0:4 dex, depending on the absolute metallicity. Globular cluster candidates are selected from deep B;V; R; I; K FORS2/ISAAC photometry with 80−100% success rate inside one eective radius. Using combined optical/near-infrared colour-colour diagrams we present a method to eciently reduce fore-/background contamination down to <10%. We find clear signs for bi-modality in the globular cluster colour distributions of NGC 1380, 3115, and 3585. The colour distributions of globular clusters in NGC 2434, 3379, 5846, and 7192 are consistent with a broad single-peak distribution. For the analysed globular cluster systems the slopes of projected radial surface density profiles, of the form Σ(R) ∼R −Γ vary between 0:8 and 2.6. Blue and red globular cluster sub-populations show similar slopes in the clearly bi-modal systems. For galaxies with single-peak globular cluster colour distributions, there is a hint that the blue cluster system seems to have a more extended radial distribution than the red one. Using globular clusters as a tracer population we determine total dynamical masses of host galaxies out to large radii (∼1:6−4:8 Reff). For the sample we find masses in the range 8:8 X1010 M⊙ up to 1:2X1012 M⊙. The line index data presented here will be used in accompanying papers of this series to derive ages, metallicities and abundance ratios. A compilation of currently available high-quality Lick index measurements for globular clusters in elliptical, lenticular, and late-type galaxies is provided and will serve to augment the current data set.

KW - galaxies : star clusters

KW - galaxies : general

U2 - 10.1051/0004-6361:20031448

DO - 10.1051/0004-6361:20031448

M3 - Article

VL - 415

SP - 123-U6

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

SN - 0004-6361

IS - 1

ER -

ID: 1795544