The hercules-aquila cloud

V. Belokurov; N. W. Evans; E. F. Bell; M. J. Irwin; P. C. Hewett; S. Koposov; C. M. Rockosi; G. Gilmore; D. B. Zucker; M. Fellhauer; M. I. Wilkinson; D. M. Bramich; S. Vidrih; H. W. Rix; T. C. Beers; D. P. Schneider; J. C. Barentine; H. Brewington; J. Brinkmann; M. Harvanek; J. Krzesinski; D. Long; K. Pan; S. A. Snedden; O. Malanushenko; V. Malanushenko

doi:10.1086/513144

The hercules-aquila cloud

V. Belokurov^*, N. W. Evans, E. F. Bell, M. J. Irwin, P. C. Hewett, S. Koposov, C. M. Rockosi, G. Gilmore, D. B. Zucker, M. Fellhauer, M. I. Wilkinson, D. M. Bramich, S. Vidrih, H. W. Rix, T. C. Beers, D. P. Schneider, J. C. Barentine, H. Brewington, J. Brinkmann, M. HarvanekJ. Krzesinski, D. Long, K. Pan, S. A. Snedden, O. Malanushenko, V. Malanushenko

^*Corresponding author for this work

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

143 Citations (Scopus)

Abstract

We present evidence for a substantial overdensity of stars in the direction of the constellations of Hercules and Aquila. The cloud is centered at a Galactic longitude of l ≈ 40° and extends above and below the Galactic plane by at least 50°. Given its off-centeredness and height, it is unlikely that the Hercules-Aquila cloud is related to the bulge or thick disk. More likely, this is a new structural component of the Galaxy that passes through the disk. The cloud stretches ∼80° in longitude. Its heliocentric distance lies between 10 and 20 kpc so that the extent of the cloud in projection is ∼20 kpc by ∼15 kpc. It has an absolute magnitude of M_v = -13, and its stellar population appears to be comparable to, but somewhat more metal-rich than, M92.

Original language	English
Pages (from-to)	L89-L92
Number of pages	4
Journal	Astrophysical Journal
Volume	657
Issue number	2
DOIs	https://doi.org/10.1086/513144
Publication status	Published - 10 Mar 2007
Externally published	Yes

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Belokurov, V., Evans, N. W., Bell, E. F., Irwin, M. J., Hewett, P. C., Koposov, S., Rockosi, C. M., Gilmore, G., Zucker, D. B., Fellhauer, M., Wilkinson, M. I., Bramich, D. M., Vidrih, S., Rix, H. W., Beers, T. C., Schneider, D. P., Barentine, J. C., Brewington, H., Brinkmann, J., ... Malanushenko, V. (2007). The hercules-aquila cloud. Astrophysical Journal, 657(2), L89-L92. https://doi.org/10.1086/513144

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title = "The hercules-aquila cloud",

abstract = "We present evidence for a substantial overdensity of stars in the direction of the constellations of Hercules and Aquila. The cloud is centered at a Galactic longitude of l ≈ 40° and extends above and below the Galactic plane by at least 50°. Given its off-centeredness and height, it is unlikely that the Hercules-Aquila cloud is related to the bulge or thick disk. More likely, this is a new structural component of the Galaxy that passes through the disk. The cloud stretches ∼80° in longitude. Its heliocentric distance lies between 10 and 20 kpc so that the extent of the cloud in projection is ∼20 kpc by ∼15 kpc. It has an absolute magnitude of Mv = -13, and its stellar population appears to be comparable to, but somewhat more metal-rich than, M92.",

author = "V. Belokurov and Evans, {N. W.} and Bell, {E. F.} and Irwin, {M. J.} and Hewett, {P. C.} and S. Koposov and Rockosi, {C. M.} and G. Gilmore and Zucker, {D. B.} and M. Fellhauer and Wilkinson, {M. I.} and Bramich, {D. M.} and S. Vidrih and Rix, {H. W.} and Beers, {T. C.} and Schneider, {D. P.} and Barentine, {J. C.} and H. Brewington and J. Brinkmann and M. Harvanek and J. Krzesinski and D. Long and K. Pan and Snedden, {S. A.} and O. Malanushenko and V. Malanushenko",

year = "2007",

month = mar,

day = "10",

doi = "10.1086/513144",

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Belokurov, V, Evans, NW, Bell, EF, Irwin, MJ, Hewett, PC, Koposov, S, Rockosi, CM, Gilmore, G, Zucker, DB, Fellhauer, M, Wilkinson, MI, Bramich, DM, Vidrih, S, Rix, HW, Beers, TC, Schneider, DP, Barentine, JC, Brewington, H, Brinkmann, J, Harvanek, M, Krzesinski, J, Long, D, Pan, K, Snedden, SA, Malanushenko, O & Malanushenko, V 2007, 'The hercules-aquila cloud', Astrophysical Journal, vol. 657, no. 2, pp. L89-L92. https://doi.org/10.1086/513144

TY - JOUR

T1 - The hercules-aquila cloud

AU - Belokurov, V.

AU - Evans, N. W.

AU - Bell, E. F.

AU - Irwin, M. J.

AU - Hewett, P. C.

AU - Koposov, S.

AU - Rockosi, C. M.

AU - Gilmore, G.

AU - Zucker, D. B.

AU - Fellhauer, M.

AU - Wilkinson, M. I.

AU - Bramich, D. M.

AU - Vidrih, S.

AU - Rix, H. W.

AU - Beers, T. C.

AU - Schneider, D. P.

AU - Barentine, J. C.

AU - Brewington, H.

AU - Brinkmann, J.

AU - Harvanek, M.

AU - Krzesinski, J.

AU - Long, D.

AU - Pan, K.

AU - Snedden, S. A.

AU - Malanushenko, O.

AU - Malanushenko, V.

PY - 2007/3/10

Y1 - 2007/3/10

N2 - We present evidence for a substantial overdensity of stars in the direction of the constellations of Hercules and Aquila. The cloud is centered at a Galactic longitude of l ≈ 40° and extends above and below the Galactic plane by at least 50°. Given its off-centeredness and height, it is unlikely that the Hercules-Aquila cloud is related to the bulge or thick disk. More likely, this is a new structural component of the Galaxy that passes through the disk. The cloud stretches ∼80° in longitude. Its heliocentric distance lies between 10 and 20 kpc so that the extent of the cloud in projection is ∼20 kpc by ∼15 kpc. It has an absolute magnitude of Mv = -13, and its stellar population appears to be comparable to, but somewhat more metal-rich than, M92.

AB - We present evidence for a substantial overdensity of stars in the direction of the constellations of Hercules and Aquila. The cloud is centered at a Galactic longitude of l ≈ 40° and extends above and below the Galactic plane by at least 50°. Given its off-centeredness and height, it is unlikely that the Hercules-Aquila cloud is related to the bulge or thick disk. More likely, this is a new structural component of the Galaxy that passes through the disk. The cloud stretches ∼80° in longitude. Its heliocentric distance lies between 10 and 20 kpc so that the extent of the cloud in projection is ∼20 kpc by ∼15 kpc. It has an absolute magnitude of Mv = -13, and its stellar population appears to be comparable to, but somewhat more metal-rich than, M92.

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U2 - 10.1086/513144

DO - 10.1086/513144

M3 - Article

AN - SCOPUS:33947664896

SN - 0004-637X

VL - 657

SP - L89-L92

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2

ER -

The hercules-aquila cloud

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