A stellar overdensity associated with the Small Magellanic Cloud
We report the discovery of a stellar overdensity 8 degrees north of the centre of the Small Magellanic Cloud (SMC; Small Magellanic Cloud Northern Over-Density; SMCNOD), using data from the first 2 yr of the Dark Energy Survey (DES) and the first year of the MAGellanic SatelLITEs Survey (MagLiteS)....
Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
---|---|
Other Authors: | |
Language: | en |
Published: |
OXFORD UNIV PRESS
2017
|
Subjects: | |
Online Access: | http://hdl.handle.net/10150/624062 http://arizona.openrepository.com/arizona/handle/10150/624062 |
id |
ndltd-arizona.edu-oai-arizona.openrepository.com-10150-624062 |
---|---|
record_format |
oai_dc |
spelling |
ndltd-arizona.edu-oai-arizona.openrepository.com-10150-6240622017-06-10T03:00:44Z A stellar overdensity associated with the Small Magellanic Cloud Pieres, A. Santiago, B. X. Drlica-Wagner, A. Bechtol, K. Marel, R. P. van der Besla, G. Martin, N. F. Belokurov, V. Gallart, C. Martinez-Delgado, D. Marshall, J. Nöel, N. E. D. Majewski, S. R. Cioni, M.-R. L. Li, T. S. Hartley, W. Luque, E. Conn, B. C. Walker, A. R. Balbinot, E. Stringfellow, G. S. Olsen, K. A. G. Nidever, D. da Costa, L. N. Ogando, R. Maia, M. Neto, A. Fausti Abbott, T. M. C. Abdalla, F. B. Allam, S. Annis, J. Benoit-Lévy, A. Rosell, A. Carnero Kind, M. Carrasco Carretero, J. Cunha, C. E. D'Andrea, C. B. Desai, S. Diehl, H. T. Doel, P. Flaugher, B. Fosalba, P. García-Bellido, J. Gruen, D. Gruendl, R. A. Gschwend, J. Gutierrez, G. Honscheid, K. James, D. Kuehn, K. Kuropatkin, N. Menanteau, F. Miquel, R. Plazas, A. A. Romer, A. K. Sako, M. Sanchez, E. Scarpine, V. Schubnell, M. Sevilla-Noarbe, I. Smith, R. C. Soares-Santos, M. Sobreira, F. Suchyta, E. Swanson, M. E. C. Tarle, G. Tucker, D. L. Wester, W. Univ Arizona, Steward Observ galaxies: interactions Magellanic Clouds We report the discovery of a stellar overdensity 8 degrees north of the centre of the Small Magellanic Cloud (SMC; Small Magellanic Cloud Northern Over-Density; SMCNOD), using data from the first 2 yr of the Dark Energy Survey (DES) and the first year of the MAGellanic SatelLITEs Survey (MagLiteS). The SMCNOD is indistinguishable in age, metallicity and distance from the nearby SMC stars, being primarily composed of intermediate-age stars (6 Gyr, Z=0.001), with a small fraction of young stars (1 Gyr, Z=0.01). The SMCNOD has an elongated shape with an ellipticity of 0.6 and a size of similar to 6 degrees x 2 degrees. It has an absolute magnitude of M-V congruent to -7.7, r(h) = 2.1 kpc, and mu v(r < r(h)) = 31.2 mag arcsec(-2). We estimate a stellar mass of similar to 10(5) M-circle dot, following a Kroupa mass function. The SMCNOD was probably removed from the SMC disc by tidal stripping, since it is located near the head of the Magellanic Stream, and the literature indicates likely recent Large Magellanic Cloud-SMC encounters. This scenario is supported by the lack of significant H-1 gas. Other potential scenarios for the SMCNOD origin are a transient overdensity within the SMC tidal radius or a primordial SMC satellite in advanced stage of disruption. 2017-06 Article A stellar overdensity associated with the Small Magellanic Cloud 2017, 468 (2):1349 Monthly Notices of the Royal Astronomical Society 0035-8711 1365-2966 10.1093/mnras/stx507 http://hdl.handle.net/10150/624062 http://arizona.openrepository.com/arizona/handle/10150/624062 Monthly Notices of the Royal Astronomical Society en https://academic.oup.com/mnras/article-lookup/doi/10.1093/mnras/stx507 © 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society OXFORD UNIV PRESS |
collection |
NDLTD |
language |
en |
sources |
NDLTD |
topic |
galaxies: interactions Magellanic Clouds |
spellingShingle |
galaxies: interactions Magellanic Clouds Pieres, A. Santiago, B. X. Drlica-Wagner, A. Bechtol, K. Marel, R. P. van der Besla, G. Martin, N. F. Belokurov, V. Gallart, C. Martinez-Delgado, D. Marshall, J. Nöel, N. E. D. Majewski, S. R. Cioni, M.-R. L. Li, T. S. Hartley, W. Luque, E. Conn, B. C. Walker, A. R. Balbinot, E. Stringfellow, G. S. Olsen, K. A. G. Nidever, D. da Costa, L. N. Ogando, R. Maia, M. Neto, A. Fausti Abbott, T. M. C. Abdalla, F. B. Allam, S. Annis, J. Benoit-Lévy, A. Rosell, A. Carnero Kind, M. Carrasco Carretero, J. Cunha, C. E. D'Andrea, C. B. Desai, S. Diehl, H. T. Doel, P. Flaugher, B. Fosalba, P. García-Bellido, J. Gruen, D. Gruendl, R. A. Gschwend, J. Gutierrez, G. Honscheid, K. James, D. Kuehn, K. Kuropatkin, N. Menanteau, F. Miquel, R. Plazas, A. A. Romer, A. K. Sako, M. Sanchez, E. Scarpine, V. Schubnell, M. Sevilla-Noarbe, I. Smith, R. C. Soares-Santos, M. Sobreira, F. Suchyta, E. Swanson, M. E. C. Tarle, G. Tucker, D. L. Wester, W. A stellar overdensity associated with the Small Magellanic Cloud |
description |
We report the discovery of a stellar overdensity 8 degrees north of the centre of the Small Magellanic Cloud (SMC; Small Magellanic Cloud Northern Over-Density; SMCNOD), using data from the first 2 yr of the Dark Energy Survey (DES) and the first year of the MAGellanic SatelLITEs Survey (MagLiteS). The SMCNOD is indistinguishable in age, metallicity and distance from the nearby SMC stars, being primarily composed of intermediate-age stars (6 Gyr, Z=0.001), with a small fraction of young stars (1 Gyr, Z=0.01). The SMCNOD has an elongated shape with an ellipticity of 0.6 and a size of similar to 6 degrees x 2 degrees. It has an absolute magnitude of M-V congruent to -7.7, r(h) = 2.1 kpc, and mu v(r < r(h)) = 31.2 mag arcsec(-2). We estimate a stellar mass of similar to 10(5) M-circle dot, following a Kroupa mass function. The SMCNOD was probably removed from the SMC disc by tidal stripping, since it is located near the head of the Magellanic Stream, and the literature indicates likely recent Large Magellanic Cloud-SMC encounters. This scenario is supported by the lack of significant H-1 gas. Other potential scenarios for the SMCNOD origin are a transient overdensity within the SMC tidal radius or a primordial SMC satellite in advanced stage of disruption. |
author2 |
Univ Arizona, Steward Observ |
author_facet |
Univ Arizona, Steward Observ Pieres, A. Santiago, B. X. Drlica-Wagner, A. Bechtol, K. Marel, R. P. van der Besla, G. Martin, N. F. Belokurov, V. Gallart, C. Martinez-Delgado, D. Marshall, J. Nöel, N. E. D. Majewski, S. R. Cioni, M.-R. L. Li, T. S. Hartley, W. Luque, E. Conn, B. C. Walker, A. R. Balbinot, E. Stringfellow, G. S. Olsen, K. A. G. Nidever, D. da Costa, L. N. Ogando, R. Maia, M. Neto, A. Fausti Abbott, T. M. C. Abdalla, F. B. Allam, S. Annis, J. Benoit-Lévy, A. Rosell, A. Carnero Kind, M. Carrasco Carretero, J. Cunha, C. E. D'Andrea, C. B. Desai, S. Diehl, H. T. Doel, P. Flaugher, B. Fosalba, P. García-Bellido, J. Gruen, D. Gruendl, R. A. Gschwend, J. Gutierrez, G. Honscheid, K. James, D. Kuehn, K. Kuropatkin, N. Menanteau, F. Miquel, R. Plazas, A. A. Romer, A. K. Sako, M. Sanchez, E. Scarpine, V. Schubnell, M. Sevilla-Noarbe, I. Smith, R. C. Soares-Santos, M. Sobreira, F. Suchyta, E. Swanson, M. E. C. Tarle, G. Tucker, D. L. Wester, W. |
author |
Pieres, A. Santiago, B. X. Drlica-Wagner, A. Bechtol, K. Marel, R. P. van der Besla, G. Martin, N. F. Belokurov, V. Gallart, C. Martinez-Delgado, D. Marshall, J. Nöel, N. E. D. Majewski, S. R. Cioni, M.-R. L. Li, T. S. Hartley, W. Luque, E. Conn, B. C. Walker, A. R. Balbinot, E. Stringfellow, G. S. Olsen, K. A. G. Nidever, D. da Costa, L. N. Ogando, R. Maia, M. Neto, A. Fausti Abbott, T. M. C. Abdalla, F. B. Allam, S. Annis, J. Benoit-Lévy, A. Rosell, A. Carnero Kind, M. Carrasco Carretero, J. Cunha, C. E. D'Andrea, C. B. Desai, S. Diehl, H. T. Doel, P. Flaugher, B. Fosalba, P. García-Bellido, J. Gruen, D. Gruendl, R. A. Gschwend, J. Gutierrez, G. Honscheid, K. James, D. Kuehn, K. Kuropatkin, N. Menanteau, F. Miquel, R. Plazas, A. A. Romer, A. K. Sako, M. Sanchez, E. Scarpine, V. Schubnell, M. Sevilla-Noarbe, I. Smith, R. C. Soares-Santos, M. Sobreira, F. Suchyta, E. Swanson, M. E. C. Tarle, G. Tucker, D. L. Wester, W. |
author_sort |
Pieres, A. |
title |
A stellar overdensity associated with the Small Magellanic Cloud |
title_short |
A stellar overdensity associated with the Small Magellanic Cloud |
title_full |
A stellar overdensity associated with the Small Magellanic Cloud |
title_fullStr |
A stellar overdensity associated with the Small Magellanic Cloud |
title_full_unstemmed |
A stellar overdensity associated with the Small Magellanic Cloud |
title_sort |
stellar overdensity associated with the small magellanic cloud |
publisher |
OXFORD UNIV PRESS |
publishDate |
2017 |
url |
http://hdl.handle.net/10150/624062 http://arizona.openrepository.com/arizona/handle/10150/624062 |
work_keys_str_mv |
AT pieresa astellaroverdensityassociatedwiththesmallmagellaniccloud AT santiagobx astellaroverdensityassociatedwiththesmallmagellaniccloud AT drlicawagnera astellaroverdensityassociatedwiththesmallmagellaniccloud AT bechtolk astellaroverdensityassociatedwiththesmallmagellaniccloud AT marelrpvander astellaroverdensityassociatedwiththesmallmagellaniccloud AT beslag astellaroverdensityassociatedwiththesmallmagellaniccloud AT martinnf astellaroverdensityassociatedwiththesmallmagellaniccloud AT belokurovv astellaroverdensityassociatedwiththesmallmagellaniccloud AT gallartc astellaroverdensityassociatedwiththesmallmagellaniccloud AT martinezdelgadod astellaroverdensityassociatedwiththesmallmagellaniccloud AT marshallj astellaroverdensityassociatedwiththesmallmagellaniccloud AT noelned astellaroverdensityassociatedwiththesmallmagellaniccloud AT majewskisr astellaroverdensityassociatedwiththesmallmagellaniccloud AT cionimrl astellaroverdensityassociatedwiththesmallmagellaniccloud AT lits astellaroverdensityassociatedwiththesmallmagellaniccloud AT hartleyw astellaroverdensityassociatedwiththesmallmagellaniccloud AT luquee astellaroverdensityassociatedwiththesmallmagellaniccloud AT connbc astellaroverdensityassociatedwiththesmallmagellaniccloud AT walkerar astellaroverdensityassociatedwiththesmallmagellaniccloud AT balbinote astellaroverdensityassociatedwiththesmallmagellaniccloud AT stringfellowgs astellaroverdensityassociatedwiththesmallmagellaniccloud AT olsenkag astellaroverdensityassociatedwiththesmallmagellaniccloud AT nideverd astellaroverdensityassociatedwiththesmallmagellaniccloud AT dacostaln astellaroverdensityassociatedwiththesmallmagellaniccloud AT ogandor astellaroverdensityassociatedwiththesmallmagellaniccloud AT maiam astellaroverdensityassociatedwiththesmallmagellaniccloud AT netoafausti astellaroverdensityassociatedwiththesmallmagellaniccloud AT abbotttmc astellaroverdensityassociatedwiththesmallmagellaniccloud AT abdallafb astellaroverdensityassociatedwiththesmallmagellaniccloud AT allams astellaroverdensityassociatedwiththesmallmagellaniccloud AT annisj astellaroverdensityassociatedwiththesmallmagellaniccloud AT benoitlevya astellaroverdensityassociatedwiththesmallmagellaniccloud AT rosellacarnero astellaroverdensityassociatedwiththesmallmagellaniccloud AT kindmcarrasco astellaroverdensityassociatedwiththesmallmagellaniccloud AT carreteroj astellaroverdensityassociatedwiththesmallmagellaniccloud AT cunhace astellaroverdensityassociatedwiththesmallmagellaniccloud AT dandreacb astellaroverdensityassociatedwiththesmallmagellaniccloud AT desais astellaroverdensityassociatedwiththesmallmagellaniccloud AT diehlht astellaroverdensityassociatedwiththesmallmagellaniccloud AT doelp astellaroverdensityassociatedwiththesmallmagellaniccloud AT flaugherb astellaroverdensityassociatedwiththesmallmagellaniccloud AT fosalbap astellaroverdensityassociatedwiththesmallmagellaniccloud AT garciabellidoj astellaroverdensityassociatedwiththesmallmagellaniccloud AT gruend astellaroverdensityassociatedwiththesmallmagellaniccloud AT gruendlra astellaroverdensityassociatedwiththesmallmagellaniccloud AT gschwendj astellaroverdensityassociatedwiththesmallmagellaniccloud AT gutierrezg astellaroverdensityassociatedwiththesmallmagellaniccloud AT honscheidk astellaroverdensityassociatedwiththesmallmagellaniccloud AT jamesd astellaroverdensityassociatedwiththesmallmagellaniccloud AT kuehnk astellaroverdensityassociatedwiththesmallmagellaniccloud AT kuropatkinn astellaroverdensityassociatedwiththesmallmagellaniccloud AT menanteauf astellaroverdensityassociatedwiththesmallmagellaniccloud AT miquelr astellaroverdensityassociatedwiththesmallmagellaniccloud AT plazasaa astellaroverdensityassociatedwiththesmallmagellaniccloud AT romerak astellaroverdensityassociatedwiththesmallmagellaniccloud AT sakom astellaroverdensityassociatedwiththesmallmagellaniccloud AT sancheze astellaroverdensityassociatedwiththesmallmagellaniccloud AT scarpinev astellaroverdensityassociatedwiththesmallmagellaniccloud AT schubnellm astellaroverdensityassociatedwiththesmallmagellaniccloud AT sevillanoarbei astellaroverdensityassociatedwiththesmallmagellaniccloud AT smithrc astellaroverdensityassociatedwiththesmallmagellaniccloud AT soaressantosm astellaroverdensityassociatedwiththesmallmagellaniccloud AT sobreiraf astellaroverdensityassociatedwiththesmallmagellaniccloud AT suchytae astellaroverdensityassociatedwiththesmallmagellaniccloud AT swansonmec astellaroverdensityassociatedwiththesmallmagellaniccloud AT tarleg astellaroverdensityassociatedwiththesmallmagellaniccloud AT tuckerdl astellaroverdensityassociatedwiththesmallmagellaniccloud AT westerw astellaroverdensityassociatedwiththesmallmagellaniccloud AT pieresa stellaroverdensityassociatedwiththesmallmagellaniccloud AT santiagobx stellaroverdensityassociatedwiththesmallmagellaniccloud AT drlicawagnera stellaroverdensityassociatedwiththesmallmagellaniccloud AT bechtolk stellaroverdensityassociatedwiththesmallmagellaniccloud AT marelrpvander stellaroverdensityassociatedwiththesmallmagellaniccloud AT beslag stellaroverdensityassociatedwiththesmallmagellaniccloud AT martinnf stellaroverdensityassociatedwiththesmallmagellaniccloud AT belokurovv stellaroverdensityassociatedwiththesmallmagellaniccloud AT gallartc stellaroverdensityassociatedwiththesmallmagellaniccloud AT martinezdelgadod stellaroverdensityassociatedwiththesmallmagellaniccloud AT marshallj stellaroverdensityassociatedwiththesmallmagellaniccloud AT noelned stellaroverdensityassociatedwiththesmallmagellaniccloud AT majewskisr stellaroverdensityassociatedwiththesmallmagellaniccloud AT cionimrl stellaroverdensityassociatedwiththesmallmagellaniccloud AT lits stellaroverdensityassociatedwiththesmallmagellaniccloud AT hartleyw stellaroverdensityassociatedwiththesmallmagellaniccloud AT luquee stellaroverdensityassociatedwiththesmallmagellaniccloud AT connbc stellaroverdensityassociatedwiththesmallmagellaniccloud AT walkerar stellaroverdensityassociatedwiththesmallmagellaniccloud AT balbinote stellaroverdensityassociatedwiththesmallmagellaniccloud AT stringfellowgs stellaroverdensityassociatedwiththesmallmagellaniccloud AT olsenkag stellaroverdensityassociatedwiththesmallmagellaniccloud AT nideverd stellaroverdensityassociatedwiththesmallmagellaniccloud AT dacostaln stellaroverdensityassociatedwiththesmallmagellaniccloud AT ogandor stellaroverdensityassociatedwiththesmallmagellaniccloud AT maiam stellaroverdensityassociatedwiththesmallmagellaniccloud AT netoafausti stellaroverdensityassociatedwiththesmallmagellaniccloud AT abbotttmc stellaroverdensityassociatedwiththesmallmagellaniccloud AT abdallafb stellaroverdensityassociatedwiththesmallmagellaniccloud AT allams stellaroverdensityassociatedwiththesmallmagellaniccloud AT annisj stellaroverdensityassociatedwiththesmallmagellaniccloud AT benoitlevya stellaroverdensityassociatedwiththesmallmagellaniccloud AT rosellacarnero stellaroverdensityassociatedwiththesmallmagellaniccloud AT kindmcarrasco stellaroverdensityassociatedwiththesmallmagellaniccloud AT carreteroj stellaroverdensityassociatedwiththesmallmagellaniccloud AT cunhace stellaroverdensityassociatedwiththesmallmagellaniccloud AT dandreacb stellaroverdensityassociatedwiththesmallmagellaniccloud AT desais stellaroverdensityassociatedwiththesmallmagellaniccloud AT diehlht stellaroverdensityassociatedwiththesmallmagellaniccloud AT doelp stellaroverdensityassociatedwiththesmallmagellaniccloud AT flaugherb stellaroverdensityassociatedwiththesmallmagellaniccloud AT fosalbap stellaroverdensityassociatedwiththesmallmagellaniccloud AT garciabellidoj stellaroverdensityassociatedwiththesmallmagellaniccloud AT gruend stellaroverdensityassociatedwiththesmallmagellaniccloud AT gruendlra stellaroverdensityassociatedwiththesmallmagellaniccloud AT gschwendj stellaroverdensityassociatedwiththesmallmagellaniccloud AT gutierrezg stellaroverdensityassociatedwiththesmallmagellaniccloud AT honscheidk stellaroverdensityassociatedwiththesmallmagellaniccloud AT jamesd stellaroverdensityassociatedwiththesmallmagellaniccloud AT kuehnk stellaroverdensityassociatedwiththesmallmagellaniccloud AT kuropatkinn stellaroverdensityassociatedwiththesmallmagellaniccloud AT menanteauf stellaroverdensityassociatedwiththesmallmagellaniccloud AT miquelr stellaroverdensityassociatedwiththesmallmagellaniccloud AT plazasaa stellaroverdensityassociatedwiththesmallmagellaniccloud AT romerak stellaroverdensityassociatedwiththesmallmagellaniccloud AT sakom stellaroverdensityassociatedwiththesmallmagellaniccloud AT sancheze stellaroverdensityassociatedwiththesmallmagellaniccloud AT scarpinev stellaroverdensityassociatedwiththesmallmagellaniccloud AT schubnellm stellaroverdensityassociatedwiththesmallmagellaniccloud AT sevillanoarbei stellaroverdensityassociatedwiththesmallmagellaniccloud AT smithrc stellaroverdensityassociatedwiththesmallmagellaniccloud AT soaressantosm stellaroverdensityassociatedwiththesmallmagellaniccloud AT sobreiraf stellaroverdensityassociatedwiththesmallmagellaniccloud AT suchytae stellaroverdensityassociatedwiththesmallmagellaniccloud AT swansonmec stellaroverdensityassociatedwiththesmallmagellaniccloud AT tarleg stellaroverdensityassociatedwiththesmallmagellaniccloud AT tuckerdl stellaroverdensityassociatedwiththesmallmagellaniccloud AT westerw stellaroverdensityassociatedwiththesmallmagellaniccloud |
_version_ |
1718457497590693888 |