WASP 0639-32: a new F-type subgiant/K-type main-sequence detached eclipsing binary from the WASP project (2018)
Journal Article
Hellier, & Maxted. (2018). WASP 0639-32: a new F-type subgiant/K-type main-sequence detached eclipsing binary from the WASP project. Astronomy & Astrophysics, A135 - A135. https://doi.org/10.1051/0004-6361/201731435

Aims. Our aim is to measure the masses and radii of the stars in a newly-discovered detached eclipsing binary system to a high precision (˜1%), enabling the system to be used for the calibration of free parameters in stellar evolutionary models.

M... Read More about WASP 0639-32: a new F-type subgiant/K-type main-sequence detached eclipsing binary from the WASP project.

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.

Infrared spectroscopy of the merger candidate KIC 9832227 (2018)
Journal Article
Pavlenko, Y., Evans, A., Banerjee, D., Southworth, J., Shahbandeh, M., & Davis, S. (2018). Infrared spectroscopy of the merger candidate KIC 9832227. Astronomy and Astrophysics, 615, Article A120. https://doi.org/10.1051/0004-6361/201832717

Context. It has been predicted that the object KIC 9832227 – a contact binary star – will undergo a merger in 2022.2±0.7.We describe the near infrared spectrum of this object as an impetus to obtain pre-merger data.
Aims. We aim to characterise (i)... Read More about Infrared spectroscopy of the merger candidate KIC 9832227.

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.

Thermal emission of WASP-48b in the K-s-band (2018)
Journal Article
Hellier. (2018). Thermal emission of WASP-48b in the K-s-band. Astronomy & Astrophysics, https://doi.org/10.1051/0004-6361/201527071

We report a detection of thermal emission from the hot Jupiter WASP-48b in the Ks-band. We used the Wide-field Infra-red Camera on the 3.6-m Canada-France Hawaii Telescope to observe an occultation of the planet by its host star. From the resulting o... Read More about Thermal emission of WASP-48b in the K-s-band.

WASP-104b is darker than charcoal (2018)
Journal Article
Močnik, T., Hellier, C., & Southworth, J. (2018). WASP-104b is darker than charcoal. Astronomical Journal, 156(2), Article 44. https://doi.org/10.3847/1538-3881/aacb26

By analyzing the K2 short-cadence data from Campaign 14, we detect phase-curve modulation in the light curve of the hot-Jupiter host star WASP-104. The ellipsoidal modulation is detected with high significance and in agreement with theoretical expect... Read More about WASP-104b is darker than charcoal.

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.

NuGrid Stellar Data Set. II. Stellar Yields from H to Bi for Stellar Models with MZAMS = 1 to 25 M? and Z = 0.0001 to 0.02 (2018)
Journal Article
Ritter, C., Herwig, F., Jones, S., Pignatari, M., Fryer, C., & Hirschi, R. (2018). NuGrid Stellar Data Set. II. Stellar Yields from H to Bi for Stellar Models with MZAMS = 1 to 25 M? and Z = 0.0001 to 0.02. Monthly Notices of the Royal Astronomical Society, 480(1), 538-571. https://doi.org/10.1093/mnras/sty1729

We provide here a significant extension of the NuGrid Set 1 models in mass coverage and toward lower metallicity, adopting the same physics assumptions. The combined data set now includes the initial masses MZAMS/?M? = 1, 1.65, 2, 3, 4, 5, 6, 7, 12,... Read More about NuGrid Stellar Data Set. II. Stellar Yields from H to Bi for Stellar Models with MZAMS = 1 to 25 M? and Z = 0.0001 to 0.02.

The VMC survey – XXXI. The spatially resolved star formation history of the main body of the Small Magellanic Cloud (2018)
Journal Article
Rubele, S., Pastorelli, G., Girardi, L., Cioni, M. L., Zaggia, S., Marigo, P., …Van Loon, J. T. (2018). The VMC survey – XXXI. The spatially resolved star formation history of the main body of the Small Magellanic Cloud. Monthly Notices of the Royal Astronomical Society, 478(4), 5017-5036. https://doi.org/10.1093/mnras/sty1279

We recover the spatially resolved star formation history across the entire main body and Wing of the Small Magellanic Cloud (SMC), using 14 deep tile images from the VISTA survey of the Magellanic Clouds (VMC) in the YJKs filters. The analysis is per... Read More about The VMC survey – XXXI. The spatially resolved star formation history of the main body of the Small Magellanic Cloud.

The Temporal Development Of Dust Formation And Destruction In Nova Sagittarii 2015#2 (V5668 SGR): A Panchromatic Study (2018)
Journal Article
(2018). The Temporal Development Of Dust Formation And Destruction In Nova Sagittarii 2015#2 (V5668 SGR): A Panchromatic Study. Astrophysical Journal, https://doi.org/10.3847/1538-4357/aaba81

We present 5-28 µm SOFIA FORECAST spectroscopy complemented by panchromatic X-ray through infrared observations of the CO nova V5668 Sgr documenting the formation and destruction of dust during ~500 days following outburst. Dust condensation commence... Read More about The Temporal Development Of Dust Formation And Destruction In Nova Sagittarii 2015#2 (V5668 SGR): A Panchromatic Study.

XXX. Stellar proper motions in the central parts of the Small Magellanic Cloud (2018)
Journal Article
Niederhofer, F., Cioni, M., Rubele, S., Schmidt, T., Bekki, K., de Grijs, R., …Zaggia, S. (2018). XXX. Stellar proper motions in the central parts of the Small Magellanic Cloud. Astronomy and Astrophysics, 613, Article L8. https://doi.org/10.1051/0004-6361/201833144

We present the first spatially resolved map of stellar proper motions within the central (similar to 3.1 x 2.4 kpc) regions of the Small Magellanic Cloud (SMC). The data used for this study encompasses four tiles from the ongoing near-infrared VISTA... Read More about XXX. Stellar proper motions in the central parts of the Small Magellanic Cloud.

The GAPS programme with HARPS-N at TNG XVI. Measurement of the Rossiter-McLaughlin effect of transiting planetary systems HAT-P-3, HAT-P-12, HAT-P-22, WASP-39, and WASP-60 (2018)
Journal Article
Mancini, L., Esposito, M., Covino, E., Southworth, J., Biazzo, K., Bruni, I., …Henning, T. (2018). The GAPS programme with HARPS-N at TNG XVI. Measurement of the Rossiter-McLaughlin effect of transiting planetary systems HAT-P-3, HAT-P-12, HAT-P-22, WASP-39, and WASP-60. Astronomy & Astrophysics, 613, Article A41. https://doi.org/10.1051/0004-6361/201732234

Context. The measurement of the orbital obliquity of hot Jupiters with different physical characteristics can provide clues to the mechanisms of migration and orbital evolution of this particular class of giant exoplanets.

Aims. We aim to derive t... Read More about The GAPS programme with HARPS-N at TNG XVI. Measurement of the Rossiter-McLaughlin effect of transiting planetary systems HAT-P-3, HAT-P-12, HAT-P-22, WASP-39, and WASP-60.

Absolute parameters for the F-type eclipsing binary BW Aquarii (2018)
Journal Article
Maxted. (2018). Absolute parameters for the F-type eclipsing binary BW Aquarii. Research Notes of the American Astronomical Society, https://doi.org/10.3847/2515-5172/aac720

BW Aqr is a bright eclipsing binary star containing a pair of F7V stars. The absolute parameters of this binary (masses, radii, etc.) are known to good precision so they are often used to test stellar models, particularly in studies of convective ove... Read More about Absolute parameters for the F-type eclipsing binary BW Aquarii.

OGLE-2017-BLG-0329L: A Microlensing Binary Characterized with Dramatically Enhanced Precision Using Data from Space-based Observations (2018)
Journal Article
(2018). OGLE-2017-BLG-0329L: A Microlensing Binary Characterized with Dramatically Enhanced Precision Using Data from Space-based Observations. Astrophysical Journal, 82. https://doi.org/10.3847/1538-4357/aabd87

Mass measurements of gravitational microlenses require one to determine the microlens parallax p E, but precise p E measurement, in many cases, is hampered due to the subtlety of the microlens-parallax signal combined with the difficulty of distingui... Read More about OGLE-2017-BLG-0329L: A Microlensing Binary Characterized with Dramatically Enhanced Precision Using Data from Space-based Observations.

Absolute parameters for the F-type eclipsing binary BW Aquarii (2018)
Journal Article
Maxted. (2018). Absolute parameters for the F-type eclipsing binary BW Aquarii. Research Notes of the American Astronomical Society, 2(2), https://doi.org/10.3847/2515-5172/aac720

BW Aqr is a bright eclipsing binary star containing a pair of F7V stars. The absolute parameters of this binary (masses, radii, etc.) are known to good precision so they are often used to test stellar models, particularly in studies of convective ove... Read More about Absolute parameters for the F-type eclipsing binary BW Aquarii.

The inflated radii of M-dwarfs in the Pleiades (2018)
Journal Article
Jackson, R. J., Deliyannis, C. P., & Jeffries, R. D. (2018). The inflated radii of M-dwarfs in the Pleiades. Monthly Notices of the Royal Astronomical Society, 476(3), 3245-3262. https://doi.org/10.1093/mnras/sty374

Rotation periods obtained with the Kepler satellite have been combined with precise measurements of projected rotation velocity from the WIYN 3.5-m telescope to determine the distribution of projected radii for several hundred low-mass (0.1 6 M/M? 6... Read More about The inflated radii of M-dwarfs in the Pleiades.

OGLE14-073 – a promising pair-instability supernova candidate (2018)
Journal Article
Kozyreva, A., Kromer, M., Noebauer, U. M., & Hirschi, R. (2018). OGLE14-073 – a promising pair-instability supernova candidate. Monthly Notices of the Royal Astronomical Society, 479(3), 3106 - 3114. https://doi.org/10.1093/mnras/sty983

The recently discovered bright Type? II supernova OGLE14-073 evolved very slowly. The light curve rose to maximum for 90?d from discovery and then declined at a rate compatible with the radioactive decay of 56Co. In this study, we show that a pair-in... Read More about OGLE14-073 – a promising pair-instability supernova candidate.

The atmospheric parameters of FGK stars using wavelet analysis of CORALIE spectra (2018)
Journal Article
Smalley, & Maxted. (2018). The atmospheric parameters of FGK stars using wavelet analysis of CORALIE spectra. Astronomy & Astrophysics, https://doi.org/10.1051/0004-6361/201731954

Context. Atmospheric properties of F-, G- and K-type stars can be measured by spectral model fitting or with the analysis of equivalent width (EW) measurements. These methods require data with good signal-to-noise ratios (S/Ns) and reliable continuum... Read More about The atmospheric parameters of FGK stars using wavelet analysis of CORALIE spectra.

The VMC survey XXVIII. Improved measurements of the proper motion of the Galactic globular cluster 47 Tucanae (2018)
Journal Article
Van Loon, J., & Oliveira, J. (2018). The VMC survey XXVIII. Improved measurements of the proper motion of the Galactic globular cluster 47 Tucanae. Astronomy & Astrophysics, https://doi.org/10.1051/0004-6361/201732144

We use deep multi-epoch point-spread function (PSF) photometry taken with the Visible and Infrared Survey Telescope for Astronomy (VISTA) to measure and analyze the proper motions of stars within the Galactic globular cluster 47 Tucanae (47 Tuc, NGC... Read More about The VMC survey XXVIII. Improved measurements of the proper motion of the Galactic globular cluster 47 Tucanae.

An absolute sodium abundance for a cloud-free 'hot Saturn' exoplanet. (2018)
Journal Article
Hellier, & Smalley. (2018). An absolute sodium abundance for a cloud-free 'hot Saturn' exoplanet. Nature, 526 - 529. https://doi.org/10.1038/s41586-018-0101-7

Broad absorption signatures from alkali metals, such as the sodium (Na I) and potassium (K I) resonance doublets, have long been predicted in the optical atmospheric spectra of cloud-free irradiated gas giant exoplanets1-3. However, observations have... Read More about An absolute sodium abundance for a cloud-free 'hot Saturn' exoplanet..