Outputs (69)

Kinematic substructure in star clusters constrains star cluster formation (2024)
Journal Article
Arnold, B., & Wright, N. J. (2024). Kinematic substructure in star clusters constrains star cluster formation. Monthly Notices of the Royal Astronomical Society, 531(1), 1191–1202. https://doi.org/10.1093/mnras/stae1236

The spatial-kinematic structure of 48 young star clusters and associations is investigated. Moran’s I statistic is used to quantify the degree of kinematic substructure in each region, and the results are compared to those expected assuming the hiera... Read More about Kinematic substructure in star clusters constrains star cluster formation.

Constraining Stellar Rotation at the Zero-age Main Sequence with TESS (2024)
Journal Article
Douglas, S. T., Cargile, P. A., Matt, S. P., Breimann, A. A., Pérez Chávez, J. A., Huang, C. X., …Zhou, G. (2024). Constraining Stellar Rotation at the Zero-age Main Sequence with TESS. Astrophysical Journal, 962(1), Article 16. https://doi.org/10.3847/1538-4357/ad0fe3

The zero-age main sequence (ZAMS) is a critical phase for stellar angular momentum evolution, as stars transition from contraction-dominated spin-up to magnetic wind-dominated spin-down. We present the first robust observational constraints on rotati... Read More about Constraining Stellar Rotation at the Zero-age Main Sequence with TESS.

EWOCS-I: The catalog of X-ray sources in Westerlund 1 from the Extended Westerlund 1 and 2 Open Clusters Survey (2023)
Journal Article
Guarcello, M., Flaccomio, E., Albacete-Colombo, J., Almendros-Abad, V., Anastasopoulou, K., Andersen, M., …Zeidler, P. (2023). EWOCS-I: The catalog of X-ray sources in Westerlund 1 from the Extended Westerlund 1 and 2 Open Clusters Survey. Astronomy & Astrophysics, 682, Article A49

Context. With a mass exceeding several 104 M and a rich and dense population of massive stars, supermassive young star clusters represent the most massive star-forming environment that is dominated by the feedback from massive stars and gravitationa... Read More about EWOCS-I: The catalog of X-ray sources in Westerlund 1 from the Extended Westerlund 1 and 2 Open Clusters Survey.

Photoevaporation and Close Encounters: How the Environment around Cygnus OB2 Affects the Evolution of Protoplanetary Disks (2023)
Journal Article
Guarcello, M. G., Drake, J. J., Wright, N. J., Albacete-Colombo, J. F., Clarke, C., Ercolano, B., …Vink, J. S. (2023). Photoevaporation and Close Encounters: How the Environment around Cygnus OB2 Affects the Evolution of Protoplanetary Disks. Astrophysical Journal Supplement, 269(1), Article 13. https://doi.org/10.3847/1538-4365/acdd67

In our Galaxy, star formation occurs in a variety of environments, with a large fraction of stars formed in clusters hosting massive stars. OB stars have an important feedback on the evolution of protoplanetary disks orbiting around nearby young star... Read More about Photoevaporation and Close Encounters: How the Environment around Cygnus OB2 Affects the Evolution of Protoplanetary Disks.

The Chandra Cygnus OB2 Legacy Survey: Design and X-Ray Point-source Catalog (2023)
Journal Article
Wright, N. J., Drake, J. J., Guarcello, M. G., Aldcroft, T. L., Kashyap, V. L., Damiani, F., …Fruscione, A. (2023). The Chandra Cygnus OB2 Legacy Survey: Design and X-Ray Point-source Catalog. Astrophysical Journal Supplement, 269(1), Article 7. https://doi.org/10.3847/1538-4365/acdd62

The Cygnus OB2 association is the largest concentration of young and massive stars within 2 kpc of the Sun, including an estimated ∼65 O-type stars and hundreds of OB stars. The Chandra Cygnus OB2 Legacy Survey is a large imaging program undertaken w... Read More about The Chandra Cygnus OB2 Legacy Survey: Design and X-Ray Point-source Catalog.

Diffuse X-Ray Emission in the Cygnus OB2 Association (2023)
Journal Article
Albacete-Colombo, J. F., Drake, J. J., Flaccomio, E., Wright, N. J., Kashyap, V., Guarcello, M. G., …Vink, J. S. (2023). Diffuse X-Ray Emission in the Cygnus OB2 Association. Astrophysical Journal Supplement, 269(1), Article 14. https://doi.org/10.3847/1538-4365/acdd65

We present a large-scale study of diffuse X-ray emission in the nearby massive stellar association Cygnus OB2 as part of the Chandra Cygnus OB2 Legacy Program. We used 40 Chandra X-ray ACIS-I observations covering ∼1.0 deg2. After removing 7924 point... Read More about Diffuse X-Ray Emission in the Cygnus OB2 Association.

X-Ray Spectral Characterization of the Young Cygnus OB2 Population (2023)
Journal Article
Flaccomio, E., Albacete-Colombo, J. F., Drake, J. J., Guarcello, M. G., Kashyap, V., Wright, N. J., …Sciortino, S. (2023). X-Ray Spectral Characterization of the Young Cygnus OB2 Population. Astrophysical Journal Supplement, 269(1), Article 12. https://doi.org/10.3847/1538-4365/acdd66

We analyze the X-ray spectra of the ∼8000 sources detected in the Cygnus OB2 Chandra Legacy Survey (this focus issue), with the goals of characterizing the coronal plasma of the young low-mass stars in the region and estimating their intrinsic X-ray... Read More about X-Ray Spectral Characterization of the Young Cygnus OB2 Population.

Simulating the Sensitivity to Stellar Point Sources of Chandra X-Ray Observations (2023)
Journal Article
Wright, N. J., Drake, J. J., Guarcello, M. G., Kashyap, V. L., & Zezas, A. (2023). Simulating the Sensitivity to Stellar Point Sources of Chandra X-Ray Observations. Astrophysical Journal Supplement, 269(1), Article 8. https://doi.org/10.3847/1538-4365/acdd63

The Chandra Cygnus OB2 Legacy Survey is a wide and deep X-ray survey of the nearby and massive Cygnus OB2 association. The survey has detected ∼8000 X-ray sources, the majority of which are pre-main-sequence X-ray-emitting young stars in the associat... Read More about Simulating the Sensitivity to Stellar Point Sources of Chandra X-Ray Observations.

Classification of Chandra X-Ray Sources in Cygnus OB2 (2023)
Journal Article
Kashyap, V. L., Guarcello, M. G., Wright, N. J., Drake, J. J., Flaccomio, E., Aldcroft, T. L., …Sciortino, S. (2023). Classification of Chandra X-Ray Sources in Cygnus OB2. Astrophysical Journal Supplement, 269(1), Article 10. https://doi.org/10.3847/1538-4365/acdd68

We have devised a predominantly Naive Bayes−based method to classify X-ray sources detected by Chandra in the Cygnus OB2 association into members, foreground objects, and background objects. We employ a variety of X-ray, optical, and infrared charact... Read More about Classification of Chandra X-Ray Sources in Cygnus OB2.

The Statistical Uncertainties on X-Ray Flux and Spectral Parameters from Chandra ACIS-I Observations of Faint Sources: Application to the Cygnus OB2 Association (2023)
Journal Article
Albacete-Colombo, J. F., Flaccomio, E., Drake, J. J., Wright, N. J., Guarcello, M., & Kashyap, V. (2023). The Statistical Uncertainties on X-Ray Flux and Spectral Parameters from Chandra ACIS-I Observations of Faint Sources: Application to the Cygnus OB2 Association. Astrophysical Journal Supplement, 269(1), 11. https://doi.org/10.3847/1538-4365/acdd69

We investigate the uncertainties of fitted X-ray model parameters and fluxes for relatively faint Chandra ACIS-I source spectra. Monte Carlo (MC) simulations are employed to construct a large set of 150,000 fake X-ray spectra in the low photon count... Read More about The Statistical Uncertainties on X-Ray Flux and Spectral Parameters from Chandra ACIS-I Observations of Faint Sources: Application to the Cygnus OB2 Association.