A deep catalogue of classical Be stars in the direction of the Perseus Arm: spectral types and interstellar reddenings

Raddi, R.; Drew, J. E.; Steeghs, D.; Wright, N. J.; Drake, J. J.; Barentsen, G.; Fabregat, J.; Sale, S. E.

doi:10.1093/mnras/stu2090

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.

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 ).

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⋆.

Mass segregation in star clusters is not energy equipartition (2016)
Journal Article
Wright. (2016). Mass segregation in star clusters is not energy equipartition. Monthly Notices of the Royal Astronomical Society, 119-123. https://doi.org/10.1093/mnrasl/slw061

Mass segregation in star clusters is often thought to indicate the onset of energy equipartition, where the most massive stars impart kinetic energy to the lower-mass stars and brown dwarfs/free floating planets. The predicted net result of this is t... Read More about Mass segregation in star clusters is not energy equipartition.

Globules and pillars in Cygnus X: I.Herschelfar-infrared imaging of the Cygnus OB2 environment⋆ (2016)
Journal Article
Schneider, N., Bontemps, S., Motte, F., Blazere, A., André, P., Anderson, L. D., …Wright, N. J. (2016). Globules and pillars in Cygnus X: I.Herschelfar-infrared imaging of the Cygnus OB2 environment⋆. Astronomy & Astrophysics, 591, Article A40. https://doi.org/10.1051/0004-6361/201628328

The radiative feedback of massive stars on molecular clouds creates pillars, globules and other features at the interface between the H II region and molecular cloud. Optical and near-infrared observations from the ground as well as with the Hubble... Read More about Globules and pillars in Cygnus X: I.Herschelfar-infrared imaging of the Cygnus OB2 environment⋆.

Discovery of a long-lived, high-amplitude dusty infrared transient (2016)
Journal Article
Britt, C. T., Maccarone, T. J., Green, J. D., Jonker, P. G., Hynes, R. I., Torres, M. A. P., …Nelemans, G. (2016). Discovery of a long-lived, high-amplitude dusty infrared transient. Monthly Notices of the Royal Astronomical Society, 460(3), 2822-2833. https://doi.org/10.1093/mnras/stw1182

We report the detection of an infrared-selected transient which has lasted at least five years, first identified by a large mid-infrared and optical outburst from a faint X-ray source detected with the Chandra X-ray Observatory. In this paper we rule... Read More about Discovery of a long-lived, high-amplitude dusty infrared transient.

Galactic Plane Hα Surveys: IPHAS and VPHAS+ (2016)
Book Chapter
Wright, N. J. (2016). Galactic Plane Hα Surveys: IPHAS and VPHAS+. In The Universe of Digital Sky Surveys (55-59). Springer International Publishing. https://doi.org/10.1007/978-3-319-19330-4_7

The optical Galactic Plane Hα surveys IPHAS and VPHAS+ are dramatically improving our understanding of Galactic stellar populations and stellar evolution by providing large samples of stars in short lived, but important, evolutionary phases, and high... Read More about Galactic Plane Hα Surveys: IPHAS and VPHAS+.

Cygnus OB2 DANCe: A high-precision proper motion study of the Cygnus OB2 association (2016)
Journal Article
Wright. (2016). Cygnus OB2 DANCe: A high-precision proper motion study of the Cygnus OB2 association. Monthly Notices of the Royal Astronomical Society, 2593 - 2610. https://doi.org/10.1093/mnras/stw1148

We present a high-precision proper motion study of 873 X-ray and spectroscopically selected stars in the massive OB association Cygnus OB2 as part of the DANCe project. These were calculated from images spanning a 15 yr baseline and have typical prec... Read More about Cygnus OB2 DANCe: A high-precision proper motion study of the Cygnus OB2 association.

Classical T Tauri stars with VPHAS+ – I. H α andu-band accretion rates in the Lagoon Nebula M8 (2015)
Journal Article
Kalari, V. M., Vink, J. S., Drew, J. E., Barentsen, G., Drake, J. J., Eislöffel, J., …Wright, N. J. (2015). Classical T Tauri stars with VPHAS+ – I. H α andu-band accretion rates in the Lagoon Nebula M8. Monthly Notices of the Royal Astronomical Society, 453(1), 1026-1046. https://doi.org/10.1093/mnras/stv1676

We estimate the accretion rates of 235 Classical T Tauri star (CTTS) candidates in the Lagoon Nebula using ugri H α photometry from the VST Photometric H α survey+. Our sample consists of stars displaying H α excess, the intensity of which is used to... Read More about Classical T Tauri stars with VPHAS+ – I. H α andu-band accretion rates in the Lagoon Nebula M8.

New OB star candidates in the Carina Arm around Westerlund 2 from VPHAS+ (2015)
Journal Article
Wright. (2015). New OB star candidates in the Carina Arm around Westerlund 2 from VPHAS+. Monthly Notices of the Royal Astronomical Society, 3855-3873. https://doi.org/10.1093/mnras/stv843

O and early B stars are at the apex of galactic ecology, but in the Milky Way, only a minority of them may yet have been identified. We present the results of a pilot study to select and parametrize OB star candidates in the Southern Galactic plane,... Read More about New OB star candidates in the Carina Arm around Westerlund 2 from VPHAS+.

A deep catalogue of classical Be stars in the direction of the Perseus Arm: spectral types and interstellar reddenings (2014)
Journal Article
Raddi, R., Drew, J. E., Steeghs, D., Wright, N. J., Drake, J. J., Barentsen, G., …Sale, S. E. (2015). A deep catalogue of classical Be stars in the direction of the Perseus Arm: spectral types and interstellar reddenings. Monthly Notices of the Royal Astronomical Society, 446(1), 274-298. https://doi.org/10.1093/mnras/stu2090

We present a catalogue of 247 photometrically and spectroscopically confirmed fainter classical Be stars (13 ≲ r ≲ 16) in the direction of the Perseus Arm of the Milky Way (−1° < b < +4°, 120° < ℓ < 140°). The catalogue consists of 181 IPHAS-selected... Read More about A deep catalogue of classical Be stars in the direction of the Perseus Arm: spectral types and interstellar reddenings.

All Outputs (69)