Physical parameters of IPHAS-selected classical Be stars: I. Determination procedure and evaluation of the results⋆

Gkouvelis, L.; Fabregat, J.; Zorec, J.; Steeghs, D.; Drew, J. E.; Raddi, R.; Wright, N. J.; Drake, J. J.

doi:10.1051/0004-6361/201527090

Disentangling the spatial substructure of Cygnus OB2 from Gaia DR2 (2019)
Journal Article
Wright. (2019). Disentangling the spatial substructure of Cygnus OB2 from Gaia DR2. Monthly Notices of the Royal Astronomical Society, 1838 -1842. https://doi.org/10.1093/mnras/stz117

For the first time, we have explored the spatial substructure of the Cygnus OB2 association using parallaxes from the recent second Gaia data release. We find significant line-of-sight substructure within the association, which we quantify using a pa... Read More about Disentangling the spatial substructure of Cygnus OB2 from Gaia DR2.

The Gaia-ESO Survey: asymmetric expansion of the Lagoon Nebula cluster NGC 6530 from GES and Gaia DR2 (2019)
Journal Article
Wright, N. J., Jeffries, R. D., Jackson, R. J., Bayo, A., Bonito, R., Damiani, F., …Zaggia, S. (2019). The Gaia-ESO Survey: asymmetric expansion of the Lagoon Nebula cluster NGC 6530 from GES and Gaia DR2. Monthly Notices of the Royal Astronomical Society, 486(2), 2477-2493. https://doi.org/10.1093/mnras/stz870

The combination of precise radial velocities from multi-object spectroscopy and highly accurate proper motions from Gaia DR2 opens up the possibility for detailed 3D kinematic studies of young star-forming regions and clusters. Here, we perform such... Read More about The Gaia-ESO Survey: asymmetric expansion of the Lagoon Nebula cluster NGC 6530 from GES and Gaia DR2.

The Gaia-ESO Survey: Age spread in the star forming region NGC 6530 from the HR diagram and gravity indicators (2019)
Journal Article
Prisinzano, L., Damiani, F., Kalari, V., Jeffries, R., Bonito, R., Micela, G., …Zaggia, S. (2019). The Gaia-ESO Survey: Age spread in the star forming region NGC 6530 from the HR diagram and gravity indicators. Astronomy & Astrophysics, 623, Article A159. https://doi.org/10.1051/0004-6361/201834870

Context. In very young clusters, stellar age distribution is empirical proof of the duration of star cluster formation and thus it gives indications of the physical mechanisms involved in the star formation process. Determining the amount of interste... Read More about The Gaia-ESO Survey: Age spread in the star forming region NGC 6530 from the HR diagram and gravity indicators.

The Dynamics of OB Associations (2018)
Journal Article
Wright. (2018). The Dynamics of OB Associations. https://doi.org/10.5281/zenodo.1489060

The formation and evolution of young star clusters and OB associations is fundamental to our understanding of the star formation process, the conditions faced by young binary and planetary systems, and the formation of long-lived open and globular cl... Read More about The Dynamics of OB Associations.

The stellar rotation-activity relationship in fully convective M dwarfs (2018)
Journal Article
Wright. (2018). The stellar rotation-activity relationship in fully convective M dwarfs. Monthly Notices of the Royal Astronomical Society, 2351 - 2360. https://doi.org/10.1093/mnras/sty1670

The coronal activity-rotation relationship is considered to be a proxy for the underlying stellar dynamo responsible for magnetic activity in solar and late-type stars. While this has been studied in considerable detail for partly convective stars th... Read More about The stellar rotation-activity relationship in fully convective M dwarfs.

Evolution of spatio-kinematic structures in star-forming regions: are Friends of Friends worth knowing? (2018)
Journal Article
Wright, N., & Parker, R. J. (2018). Evolution of spatio-kinematic structures in star-forming regions: are Friends of Friends worth knowing?. Monthly Notices of the Royal Astronomical Society, 481(2), 1679-1689. https://doi.org/10.1093/mnras/sty2372

The Friends of Friends algorithm identifies groups of objects with similar spatial and kinematic properties, and has recently been used extensively to quantify the distributions of gas and stars in young star-forming regions. We apply the Friends of... Read More about Evolution of spatio-kinematic structures in star-forming regions: are Friends of Friends worth knowing?.

A sextet of clusters in the Vela OB2 region revealed by Gaia (2018)
Journal Article
Wright. (2018). A sextet of clusters in the Vela OB2 region revealed by Gaia. Monthly Notices of the Royal Astronomical Society: Letters, https://doi.org/10.1093/mnrasl/sly144

Using Gaia DR2 data, combined with OmegaCAM ground-based optical photometry from the AD-HOC survey, and detailed Radial Velocity measurements from ESO-Gaia, we analyse in detail a 10 ×5 deg region around the Wolf-Rayet star ?2 Vel, including the prev... Read More about A sextet of clusters in the Vela OB2 region revealed by Gaia.

The low mass population of the Vela OB2 association from Gaia (2018)
Journal Article
Armstrong, J. J., Jeffries, R. D., & Wright, N. J. (2018). The low mass population of the Vela OB2 association from Gaia. Monthly Notices of the Royal Astronomical Society: Letters, 480(1), L121–L125. https://doi.org/10.1093/mnrasl/sly137

The first Gaia Data Release presents an opportunity to characterise the low-mass population of OB associations, providing larger statistical samples and better constraints on the formation and evolution of clusters and associations. Using previously... Read More about The low mass population of the Vela OB2 association from Gaia.

Massive stars in the hinterland of the young cluster, Westerlund 2 (2018)
Journal Article
Wright. (2018). Massive stars in the hinterland of the young cluster, Westerlund 2. Monthly Notices of the Royal Astronomical Society, 2109-2124. https://doi.org/10.1093/mnras/sty1905

An unsettled question concerning the formation and distribution of massive stars is whether they must be born in massive clusters and, if found in less dense environments, whether they must have migrated there. With the advent of wide-area digital ph... Read More about Massive stars in the hinterland of the young cluster, Westerlund 2.

The Gaia-ESO Survey: a kinematical and dynamical study of four young open clusters (2018)
Journal Article
Jeffries, R., Jackson, R., & Wright, N. (2018). The Gaia-ESO Survey: a kinematical and dynamical study of four young open clusters. Astronomy & Astrophysics, https://doi.org/10.1051/0004-6361/201832645

Context The origin and dynamical evolution of star clusters is an important topic in stellar astrophysics. Several models have been proposed in order to understand the formation of bound and unbound clusters and their evolution, and they can be test... Read More about The Gaia-ESO Survey: a kinematical and dynamical study of four young open clusters.

The Kinematics of the Scorpius-Centaurus OB Association from Gaia DR1 (2018)
Journal Article
Wright. (2018). The Kinematics of the Scorpius-Centaurus OB Association from Gaia DR1. Monthly Notices of the Royal Astronomical Society, 381-398. https://doi.org/10.1093/mnras/sty207

We present a kinematic study of the Scorpius-Centaurus (Sco-Cen) OB association (Sco OB2) using Gaia DR1 parallaxes and proper motions. Our goal is to test the classical theory that OB associations are the expanded remnants of dense and compact star... Read More about The Kinematics of the Scorpius-Centaurus OB Association from Gaia DR1.

Discovery of a New Classical Nova Shell Around a Nova-like Cataclysmic Variable (2018)
Journal Article
Wright. (2018). Discovery of a New Classical Nova Shell Around a Nova-like Cataclysmic Variable. Astrophysical Journal, https://doi.org/10.3847/1538-4357/aab669

The morphology and optical spectrum of IPHASX J210204.7+471015, a nebula classified as a possible planetary nebula are, however, strikingly similar to those of AT Cnc, a classical nova shell around a dwarf nova. To investigate its true nature, we h... Read More about Discovery of a New Classical Nova Shell Around a Nova-like Cataclysmic Variable.

A new mechanical stellar wind feedback model for the Rosette Nebula (2018)
Journal Article
Wright. (2018). A new mechanical stellar wind feedback model for the Rosette Nebula. Monthly Notices of the Royal Astronomical Society, 3598-3612. https://doi.org/10.1093/mnras/sty148

The famous Rosette Nebula has an evacuated central cavity formed from the stellar winds ejected from the 2-6 million-year-old co-distant and co-moving central star cluster NGC 2244. However, with upper age estimates of less than 110,000 years, the ce... Read More about A new mechanical stellar wind feedback model for the Rosette Nebula.

A and F stars as probes of outer Galactic disc kinematics (2018)
Journal Article
Wright. (2018). A and F stars as probes of outer Galactic disc kinematics. Monthly Notices of the Royal Astronomical Society, 1680 -1695. https://doi.org/10.1093/mnras/stx3299

Previous studies of the rotation law in the outer Galactic disc have mainly used gas tracers or clump giants. Here, we explore A and F stars as alternatives: these provide a much denser sampling in the outer disc than gas tracers and have experienced... Read More about A and F stars as probes of outer Galactic disc kinematics.

A tale of three cities - OmegaCAM discovers multiple sequences in the color-magnitude diagram of the Orion Nebula Cluster (2017)
Journal Article
Wright, N. J. (2017). A tale of three cities - OmegaCAM discovers multiple sequences in the color-magnitude diagram of the Orion Nebula Cluster. Astronomy and Astrophysics, A22 - A22. https://doi.org/10.1051/0004-6361/201730432

As part of the accretion discs in Ha with OmegaCAM (ADHOC) survey, we imaged a region of 12 × 8 square degrees around the Orion Nebula Cluster in r, i and Ha. Thanks to the high-quality photometry obtained, we discovered three well-separated pre-main... Read More about A tale of three cities - OmegaCAM discovers multiple sequences in the color-magnitude diagram of the Orion Nebula Cluster.

The Gaia-ESO Survey: Structural and dynamical properties of the young cluster Chamaeleon I (2017)
Journal Article
Sacco, G., Spina, L., Randich, S., Palla, F., Parker, R., Jeffries, R., …Zaggia, S. (2017). The Gaia-ESO Survey: Structural and dynamical properties of the young cluster Chamaeleon I. Astronomy and Astrophysics, 601, https://doi.org/10.1051/0004-6361/201629698

Investigating the physical mechanisms driving the dynamical evolution of young star clusters is fundamental to our understanding of the star formation process and the properties of the Galactic field stars. The young (~2 Myr) and partially embedded c... Read More about The Gaia-ESO Survey: Structural and dynamical properties of the young cluster Chamaeleon I.

The deep OB star population in Carina from the VST Photometric H alpha Survey (VPHAS plus ) (2016)
Journal Article
Wright. (2016). The deep OB star population in Carina from the VST Photometric H alpha Survey (VPHAS plus ). Monthly Notices of the Royal Astronomical Society, 1807 - 1830. https://doi.org/10.1093/mnras/stw2751

Massive OB stars are critical to the ecology of galaxies and yet our knowledge of OB stars in the Milky Way, fainter than V ~ 12, remains patchy. Data from the VST Photometric Ha Survey (VPHAS+) permit the construction of the first deep catalogues of... Read More about The deep OB star population in Carina from the VST Photometric H alpha Survey (VPHAS plus ).

Solar-type dynamo behaviour in fully convective stars without a tachocline. (2016)
Journal Article
Wright, N. J., & Drake, J. J. (2016). Solar-type dynamo behaviour in fully convective stars without a tachocline. Nature, 526 -528. https://doi.org/10.1038/nature18638

In solar-type stars (with radiative cores and convective envelopes like our Sun), the magnetic field powers star spots, flares and other solar phenomena, as well as chromospheric and coronal emission at ultraviolet to X-ray wavelengths. The dynamo re... Read More about Solar-type dynamo behaviour in fully convective stars without a tachocline..

SXP 214: An X-ray Pulsar In The Small Magellanic Cloud, Crossing The Circumstellar Disk Of The Companion (2016)
Journal Article
Wright. (2016). SXP 214: An X-ray Pulsar In The Small Magellanic Cloud, Crossing The Circumstellar Disk Of The Companion. Astrophysical Journal, https://doi.org/10.3847/0004-637X/826/1/4

Located in the Small Magellanic Cloud (SMC), SXP 214 is an X-ray pulsar in a high mass X-ray binary system with a Be-star companion. A recent survey of the SMC under a Chandra X-ray Visionary program found that the source was in a transition when the... Read More about SXP 214: An X-ray Pulsar In The Small Magellanic Cloud, Crossing The Circumstellar Disk Of The Companion.

Physical parameters of IPHAS-selected classical Be stars: I. Determination procedure and evaluation of the results⋆ (2016)
Journal Article
Gkouvelis, L., Fabregat, J., Zorec, J., Steeghs, D., Drew, J. E., Raddi, R., …Drake, J. J. (2016). Physical parameters of IPHAS-selected classical Be stars: I. Determination procedure and evaluation of the results⋆. Astronomy & Astrophysics, 591, A140. https://doi.org/10.1051/0004-6361/201527090

We present a semi-automatic procedure to obtain fundamental physical parameters and distances of classical Be (CBe) stars, based on the Barbier-Chalonge-Divan (BCD) spectrophotometric system. Our aim is to apply this procedure to a large sample of CB... Read More about Physical parameters of IPHAS-selected classical Be stars: I. Determination procedure and evaluation of the results⋆.

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