Search Results - "Niederhofer, F"

Apparent age spreads in clusters and the role of stellar rotation by Niederhofer, F., Georgy, C., Bastian, N., Ekström, S.

“…We use the Geneva syclist isochrone models that include the effects of stellar rotation to investigate the role that rotation has on the resulting…”
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The search for multiple populations in Magellanic Cloud clusters -- IV. Coeval multiple stellar populations in the young star cluster NGC 1978 by Martocchia, S, Niederhofer, F, Dalessandro, E, Bastian, N, Kacharov, N, Usher, C, Cabrera-Ziri, I, Lardo, C, Cassisi, S, Geisler, D, Hilker, M, Hollyhead, K, Kozhurina-Platais, V, Larsen, S, Mackey, D, Mucciarelli, A, Platais, I, Salaris, M

“…Abstract We have recently shown that the ∼2 Gyr old Large Magellanic Cloud star cluster NGC 1978 hosts multiple populations in terms of star-to-star abundance…”
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The morphology of the sub-giant branch and red clump reveal no sign of age spreads in intermediate-age clusters by Bastian, N., Niederhofer, F.

“…A recent surprise in stellar cluster research, made possible through the precision of Hubble Space Telescope photometry, was that some intermediate-age…”
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The search for multiple populations in Magellanic Cloud clusters – II. The detection of multiple populations in three intermediate-age SMC clusters by Niederhofer, F, Bastian, N, Kozhurina-Platais, V, Larsen, S, Hollyhead, K, Lardo, C, Cabrera-Ziri, I, Kacharov, N, Platais, I, Salaris, M, Cordero, M, Dalessandro, E, Geisler, D, Hilker, M, Li, C, Mackey, D, Mucciarelli, A

“…This is the second paper in our series about the search for multiple populations in Magellanic Cloud star clusters using the Hubble Space Telescope. Here we…”
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The search for multiple populations in Magellanic Clouds clusters – V. Correlation between cluster age and abundance spreads by Martocchia, S, Dalessandro, E, Lardo, C, Cabrera-Ziri, I, Bastian, N, Kozhurina-Platais, V, Salaris, M, Chantereau, W, Geisler, D, Hilker, M, Kacharov, N, Larsen, S, Mucciarelli, A, Niederhofer, F, Platais, I, Usher, C

“…ABSTRACT In our HST photometric survey, we have been searching for multiple stellar populations (MPs) in Magellanic Clouds (MCs) massive star clusters which…”
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Age as a major factor in the onset of multiple populations in stellar clusters by Martocchia, S., Cabrera-Ziri, I., Lardo, C., Dalessandro, E., Bastian, N., Kozhurina-Platais, V., Usher, C., Niederhofer, F., Cordero, M., Geisler, D., Hollyhead, K., Kacharov, N., Larsen, S., Li, C., Mackey, D., Hilker, M., Mucciarelli, A., Platais, I., Salaris, M.

“…It is now well established that globular clusters (GCs) exhibit star-to-star light-element abundance variations (known as multiple populations, MPs). Such…”
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A high fraction of Be stars in young massive clusters: evidence for a large population of near-critically rotating stars by Bastian, N, Cabrera-Ziri, I, Niederhofer, F, de Mink, S, Georgy, C, Baade, D, Correnti, M, Usher, C, Romaniello, M

“…Recent photometric analyses of the colour-magnitude diagrams of young massive clusters (YMCs) have found evidence for splitting in the main sequence and…”
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The search for multiple populations in Magellanic Cloud clusters – I. Two stellar populations in the Small Magellanic Cloud globular cluster NGC 121 by Niederhofer, F, Bastian, N, Kozhurina-Platais, V, Larsen, S, Salaris, M, Dalessandro, E, Mucciarelli, A, Cabrera-Ziri, I, Cordero, M, Geisler, D, Hilker, M, Hollyhead, K, Kacharov, N, Lardo, C, Li, C, Mackey, D, Platais, I

“…We started a photometric survey using the WFC3/UVIS instrument onboard the Hubble Space Telescope to search for multiple populations within Magellanic Cloud…”
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The effects of stellar rotation along the main sequence of the 100-Myr-old massive cluster NGC 1850 by Kamann, S, Saracino, S, Bastian, N, Gossage, S, Usher, C, Baade, D, Cabrera-Ziri, I, de Mink, S E, Ekstrom, S, Georgy, C, Hilker, M, Larsen, S S, Mackey, D, Niederhofer, F, Platais, I, Yong, D

“…ABSTRACT Young star clusters enable us to study the effects of stellar rotation on an ensemble of stars of the same age and across a wide range in stellar mass…”
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The tight subgiant branch of the intermediate-age star cluster NGC 411 implies a single-aged stellar population by Li, C., de Grijs, R., Bastian, N., Deng, L., Niederhofer, F., Zhang, C.

“…The presence of extended main-sequence turn-off (eMSTO) regions in intermediate-age star clusters in the Large and Small Magellanic Clouds is often interpreted…”
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Searching for globular cluster chemical anomalies on the main sequence of a young massive cluster by Cabrera-Ziri, I, Speagle, J S, Dalessandro, E, Usher, C, Bastian, N, Salaris, M, Martocchia, S, Kozhurina-Platais, V, Niederhofer, F, Lardo, C, Larsen, S S, Saracino, S

“…ABSTRACT The spectroscopic and photometric signals of the star-to-star abundance variations found in globular clusters seem to be correlated with global…”
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Is the escape velocity in star clusters linked to extended star formation histories? Using NGC 7252: W3 as a test case by Cabrera-Ziri, I., Bastian, N., Hilker, M., Davies, B., Schweizer, F., Kruijssen, J. M. D., Mejía-Narváez, A., Niederhofer, F., Brandt, T. D., Rejkuba, M., Bruzual, G., Magris, G.

“…The colour–magnitude diagrams of some intermediate-age (1–2 Gyr) star clusters show unexpectedly broad main-sequence turnoffs, raising the possibility that…”
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No evidence for younger stellar generations within the intermediate-age massive clusters NGC 1783, NGC 1806 and NGC 411 by Cabrera-Ziri, I., Niederhofer, F., Bastian, N., Rejkuba, M., Balbinot, E., Kerzendorf, W. E., Larsen, S. S., Mackey, A. D., Dalessandro, E., Mucciarelli, A., Charbonnel, C., Hilker, M., Gieles, M., Hénault-Brunet, V.

“…Recently, Li et al. claimed to have found evidence for multiple generations of stars in the intermediate-age clusters NGC 1783, NGC 1806 and NGC 411 in the…”
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The search for multiple populations in Magellanic Cloud Clusters – III. No evidence for multiple populations in the SMC cluster NGC 419 by Martocchia, S., Bastian, N., Usher, C., Kozhurina-Platais, V., Niederhofer, F., Cabrera-Ziri, I., Dalessandro, E., Hollyhead, K., Kacharov, N., Lardo, C., Larsen, S., Mucciarelli, A., Platais, I., Salaris, M., Cordero, M., Geisler, D., Hilker, M., Li, C., Mackey, D.

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A young cluster with an extended main-sequence turnoff: confirmation of a prediction of the stellar rotation scenario by Bastian, N., Niederhofer, F., Kozhurina-Platais, V., Salaris, M., Larsen, S., Cabrera-Ziri, I., Cordero, M., Ekström, S., Geisler, D., Georgy, C., Hilker, M., Kacharov, N., Li, C., Mackey, D., Mucciarelli, A., Platais, I.

“…We present Hubble Space Telescope photometry of NGC 1850, a ∼100 Myr, ∼105 M⊙ cluster in the Large Magellanic Cloud. The colour–magnitude diagram clearly shows…”
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Spectroscopic detection of multiple populations in the similar to 2 Gyr old cluster Hodge 6 in the LMC by Hollyhead, Katherine, Martocchia, S., Lardo, C., Bastian, N., Kacharov, N., Niederhofer, F., Cabrera-Ziri, I., Dalessandro, E., Mucciarelli, A., Salaris, M., Usher, C.

“…We report the spectroscopic discovery of abundance spreads (i.e. multiple populations) in the similar to 2 Gyr old cluster in the LMC, Hodge 6. We use…”
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Spectroscopic detection of multiple populations in the ∼2 Gyr old cluster Hodge 6 in the LMC by Hollyhead, K, Martocchia, S, Lardo, C, Bastian, N, Kacharov, N, Niederhofer, F, Cabrera-Ziri, I, Dalessandro, E, Mucciarelli, A, Salaris, M, Usher, C

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Hubble Space Telescope proper motions of Large Magellanic Cloud star clusters -- I. Catalogues and results for NGC 1850 by Niederhofer, F, Bellini, A, Kozhurina-Platais, V, Libralato, M, Häberle, M, Kacharov, N, Kamann, S, Bastian, N, Cabrera-Ziri, I, Cioni, M. -R. L, Dresbach, F, Martocchia, S, Massari, D, Saracino, S

“…We present proper motion (PM) measurements for a sample of 23 massive star clusters within the Large Magellanic Cloud using multi-epoch data from the Hubble…”
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The VMC survey -- XLVI. Stellar proper motions in the centre of the Large Magellanic Cloud by Niederhofer, F, Cioni, M. -R. L, Schmidt, T, Bekki, K, de Grijs, R, Ivanov, V. D, Oliveira, J. M, Ripepi, V, Subramanian, S, van Loon, J. Th

“…We present proper motion (PM) measurements within the central region of the Large Magellanic Cloud (LMC) using near-infrared data from the VISTA survey of the…”
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Searching for globular cluster chemical anomalies on the main sequence of a young massive cluster by Cabrera-Ziri, I, Speagle, J. S, Dalessandro, E, Usher, C, Bastian, N. J, Salaris, M, Martocchia, S, Kozhurina-Platais, V, Niederhofer, F, Lardo, C, Larsen, S. S, Saracino, S

“…The spectroscopic and photometric signals of the star-to-star abundance variations found in globular clusters seem to be correlated with global parameters like…”
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