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A new milky way halo star cluster in the southern galactic sky

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A new milky way halo star cluster in the southern galactic sky. / Balbinot, E.; Santiago, B. X.; da Costa, L.; Maia, M. A. G.; Majewski, S. R.; Nidever, D.; Rocha-Pinto, H. J.; Thomas, D.; Wechsler, R. H.; Yanny, B.

In: The Astrophysical Journal, Vol. 767, No. 2, 20.04.2013, p. 101.

Research output: Contribution to journalArticle

Harvard

Balbinot, E, Santiago, BX, da Costa, L, Maia, MAG, Majewski, SR, Nidever, D, Rocha-Pinto, HJ, Thomas, D, Wechsler, RH & Yanny, B 2013, 'A new milky way halo star cluster in the southern galactic sky', The Astrophysical Journal, vol. 767, no. 2, pp. 101. https://doi.org/10.1088/0004-637X/767/2/101

APA

Balbinot, E., Santiago, B. X., da Costa, L., Maia, M. A. G., Majewski, S. R., Nidever, D., Rocha-Pinto, H. J., Thomas, D., Wechsler, R. H., & Yanny, B. (2013). A new milky way halo star cluster in the southern galactic sky. The Astrophysical Journal, 767(2), 101. https://doi.org/10.1088/0004-637X/767/2/101

Vancouver

Balbinot E, Santiago BX, da Costa L, Maia MAG, Majewski SR, Nidever D et al. A new milky way halo star cluster in the southern galactic sky. The Astrophysical Journal. 2013 Apr 20;767(2):101. https://doi.org/10.1088/0004-637X/767/2/101

Author

Balbinot, E. ; Santiago, B. X. ; da Costa, L. ; Maia, M. A. G. ; Majewski, S. R. ; Nidever, D. ; Rocha-Pinto, H. J. ; Thomas, D. ; Wechsler, R. H. ; Yanny, B. / A new milky way halo star cluster in the southern galactic sky. In: The Astrophysical Journal. 2013 ; Vol. 767, No. 2. pp. 101.

Bibtex

@article{6df70137e20d4d47bbc472d901f693ea,
title = "A new milky way halo star cluster in the southern galactic sky",
abstract = "We report on the discovery of a new Milky Way (MW) companion stellar system located at (αJ 2000, δJ 2000) = (22h10m43.s15, 14◦56_58.8). The discovery was made using the eighth data release of SDSS after applying an automated method to search for overdensities in the Baryon Oscillation Spectroscopic Survey footprint. Follow-up observations were performed using Canada–France–Hawaii Telescope/MegaCam, which reveal that this system is comprised of an old stellar population, located at a distance of 31.9+1.0−1.6 kpc, with a half-light radius of rh = 7.24+1.94−1.29 pc and a concentration parameter of c = log10(rt/rc) = 1.55. Asystematic isochrone fit to its color–magnitude diagram resulted in log (age yr−1) =10.07+0.05−0.03 and [Fe/H] = −1.58+0.08−0.13. These quantities are typical of globular clusters in the MW halo.The newly found object is of low stellar mass, whose observed excess relative to the background is caused by 95 ± 6 stars. The direct integration of its background decontaminated luminosity function leads to an absolute magnitude of MV = −1.21 ± 0.66. The resulting surface brightness is μV = 25.90 mag arcsec−2. Its position in the MV versus rh diagram lies close to AM4 and Koposov 1, which are identified as star clusters. The object is most likely a very faint star cluster—one of the faintest and lowest mass systems yet identified.",
keywords = "galaxies: dwarf, globular clusters: general, Local Group",
author = "E. Balbinot and Santiago, {B. X.} and {da Costa}, L. and Maia, {M. A. G.} and Majewski, {S. R.} and D. Nidever and Rocha-Pinto, {H. J.} and D. Thomas and Wechsler, {R. H.} and B. Yanny",
year = "2013",
month = apr,
day = "20",
doi = "10.1088/0004-637X/767/2/101",
language = "English",
volume = "767",
pages = "101",
journal = "The Astrophysical Journal",
issn = "0004-637X",
publisher = "IOP Publishing",
number = "2",

}

RIS

TY - JOUR

T1 - A new milky way halo star cluster in the southern galactic sky

AU - Balbinot, E.

AU - Santiago, B. X.

AU - da Costa, L.

AU - Maia, M. A. G.

AU - Majewski, S. R.

AU - Nidever, D.

AU - Rocha-Pinto, H. J.

AU - Thomas, D.

AU - Wechsler, R. H.

AU - Yanny, B.

PY - 2013/4/20

Y1 - 2013/4/20

N2 - We report on the discovery of a new Milky Way (MW) companion stellar system located at (αJ 2000, δJ 2000) = (22h10m43.s15, 14◦56_58.8). The discovery was made using the eighth data release of SDSS after applying an automated method to search for overdensities in the Baryon Oscillation Spectroscopic Survey footprint. Follow-up observations were performed using Canada–France–Hawaii Telescope/MegaCam, which reveal that this system is comprised of an old stellar population, located at a distance of 31.9+1.0−1.6 kpc, with a half-light radius of rh = 7.24+1.94−1.29 pc and a concentration parameter of c = log10(rt/rc) = 1.55. Asystematic isochrone fit to its color–magnitude diagram resulted in log (age yr−1) =10.07+0.05−0.03 and [Fe/H] = −1.58+0.08−0.13. These quantities are typical of globular clusters in the MW halo.The newly found object is of low stellar mass, whose observed excess relative to the background is caused by 95 ± 6 stars. The direct integration of its background decontaminated luminosity function leads to an absolute magnitude of MV = −1.21 ± 0.66. The resulting surface brightness is μV = 25.90 mag arcsec−2. Its position in the MV versus rh diagram lies close to AM4 and Koposov 1, which are identified as star clusters. The object is most likely a very faint star cluster—one of the faintest and lowest mass systems yet identified.

AB - We report on the discovery of a new Milky Way (MW) companion stellar system located at (αJ 2000, δJ 2000) = (22h10m43.s15, 14◦56_58.8). The discovery was made using the eighth data release of SDSS after applying an automated method to search for overdensities in the Baryon Oscillation Spectroscopic Survey footprint. Follow-up observations were performed using Canada–France–Hawaii Telescope/MegaCam, which reveal that this system is comprised of an old stellar population, located at a distance of 31.9+1.0−1.6 kpc, with a half-light radius of rh = 7.24+1.94−1.29 pc and a concentration parameter of c = log10(rt/rc) = 1.55. Asystematic isochrone fit to its color–magnitude diagram resulted in log (age yr−1) =10.07+0.05−0.03 and [Fe/H] = −1.58+0.08−0.13. These quantities are typical of globular clusters in the MW halo.The newly found object is of low stellar mass, whose observed excess relative to the background is caused by 95 ± 6 stars. The direct integration of its background decontaminated luminosity function leads to an absolute magnitude of MV = −1.21 ± 0.66. The resulting surface brightness is μV = 25.90 mag arcsec−2. Its position in the MV versus rh diagram lies close to AM4 and Koposov 1, which are identified as star clusters. The object is most likely a very faint star cluster—one of the faintest and lowest mass systems yet identified.

KW - galaxies: dwarf

KW - globular clusters: general

KW - Local Group

U2 - 10.1088/0004-637X/767/2/101

DO - 10.1088/0004-637X/767/2/101

M3 - Article

VL - 767

SP - 101

JO - The Astrophysical Journal

JF - The Astrophysical Journal

SN - 0004-637X

IS - 2

ER -

ID: 1789913