The second data release of the INT Photometric Hα Survey of the Northern Galactic Plane (IPHAS DR2)

Barentsen, Geert; Farnhill, H. J.; Drew, J. E.; González-Solares, E.; Greimel, R.; Irwin, M. J.; Miszalski, B.; Ruhland, Christine; Groot, P.; Mampaso, A.; Sale, S. E.; Henden, A. A.; Aungwerojwit, A.; Barlow, M. J.; Carter, Philip J.; Corradi, R. L. M.; Drake, J. J.; Eislöffel, J.; Fabregat, J.; Gänsicke, B. T.; Fusillo, N. P. Gentile; Greiss, S.; Hales, Antonio; Hodgkin, S. T.; Huckvale, L.; Irwin, Jonathan; King, Robert R.; Knigge, Christian; Kupfer, Thomas; Lagadec, E.; Lennon, D. J.; Lewis, James R.; Mohr-Smith, M.; Morris, Rhys; Naylor, T.; Parker, Quentin A.; Phillipps, S.; Pyrzas, S.; Raddi, R.; Roelofs, G.; Rodríguez‐Gil, P.; Sabin, L.; Scaringi, Simone; Steeghs, D.; Suso, J.; Tata, R.; Unruh, Y. C.; Roestel, Jan van; Viironen, K.; Vink, J. S.; Walton, N. A.; Wright, N. J.; Zijlstra, A. A.

doi:10.1093/mnras/stu1651

Cited by 144 publications

(103 citation statements)

References 86 publications

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“…The r′ and i′ images were photometrically calibrated with respect to the IPHAS DR2 catalog (Barentsen et al 2014) using Vega-AB magnitude conversions stated therein. We measure isophotal integrated magnitudes of m r′ = 25.1±0.1 AB mag and m i′ = 23.9±0.1 AB mag for the optical counterpart of FRB 121102.…”

Section: Observations and Data Analysismentioning

confidence: 99%

The Host Galaxy and Redshift of the Repeating Fast Radio Burst FRB 121102

Tendulkar

Bassa

Cordes

et al. 2017

ApJL

669

775

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The precise localization of the repeating fast radio burst (FRB 121102) has provided the first unambiguous association (chance coincidence probability p3×10 −4 ) of an FRB with an optical and persistent radio counterpart. We report on optical imaging and spectroscopy of the counterpart and find that it is an extended (0 6-0 8) object displaying prominent Balmer and [O III] emission lines. Based on the spectrum and emission line ratios, we classify the counterpart as a low-metallicity, star-forming, m r′ = 25.1 AB mag dwarf galaxy at a redshift of z = 0.19273(8), corresponding to a luminosity distance of 972 Mpc. From the angular size, the redshift, and luminosity, we estimate the host galaxy to have a diameter 4 kpc and a stellar mass of M * ∼(4-7)×107 M e , assuming a mass-to-light ratio between 2 to 3 M e L e −1 . Based on the Hα flux, we estimate the star formation rate of the host to be 0.4 M e yr −1 and a substantial host dispersion measure (DM) depth 324 pc cm −3 . The net DM contribution of the host galaxy to FRB 121102 is likely to be lower than this value depending on geometrical factors. We show that the persistent radio source at FRB 121102's location reported by Marcote et al. is offset from the galaxy's center of light by ∼200 mas and the host galaxy does not show optical signatures for AGN activity. If FRB 121102 is typical of the wider FRB population and if future interferometric localizations preferentially find them in dwarf galaxies with low metallicities and prominent emission lines, they would share such a preference with long gamma-ray bursts and superluminous supernovae.

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Section: Observations and Data Analysismentioning

confidence: 99%

The Host Galaxy and Redshift of the Repeating Fast Radio Burst FRB 121102

Tendulkar

Bassa

Cordes

et al. 2017

ApJL

669

775

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“…First release (Drew et al 2005) for GDW13 and second release (Barentsen et al 2014) for GDW15. The limit for good photometry is around r =21 m .…”

Section: Data From Literaturementioning

confidence: 99%

Near-infrared time-series photometry in the field of Cygnus OB2 association

Roquette

Bouvier

Alencar

et al. 2017

A&A

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Context. In the last decades, the early pre main sequence stellar rotational evolution picture has been constrained by studies targetting different regions at a variety of ages with respect to young star formation. Observational studies suggest a dependence of rotation with mass, and for some mass ranges a connection between rotation and the presence of a circumstellar disk. Not still fully explored, though, is the role of environmental conditions on the rotational regulation.Aims. We investigate the rotational properties of candidate members of the young massive association Cygnus OB2. By evaluating their rotational properties, we address questions regarding the effect of environment properties on PMS rotational evolution.Methods. We studied JHK-band variability in 5083 candidate members (24% of them are diskbearing stars). The selection of variable stars was done using Stetson variability index, and period search was performed using Lomb-Scargle periodogram for periods between 0.83-45 days. Period detections were verified by using False Alarme Probability levels, the Saunders statistics, string/rope length method, and visual verification of folded light curves.Results. We identified 1224 periodic variable stars (24% of the candidate member sample, 8% of the disk-bearing sample, and 28% of the non-disked sample). Monte Carlo simulations were performed in order to evaluate completeness and contamination of the periodic sample, out of which 894 measured periods were considered reliable. Our study was considered reasonably complete for periods between 2 and 30 days. Conclusions. The general scenario for the rotational evolution of young stars seen in other regions is confirmed by Cygnus OB2 period distributions, with disked stars rotating on average slower than non-disked stars. A mass-rotation dependence was also verified, but as in NGC 6530, very low mass stars (M ≤ 0.4M ) are rotating on average slower than higher mass stars (0.4 M < M ≤ 1.4M ). We observed an excess of slow rotators among the lower mass population. The disk and mass-rotation connection was also analysed by taking into account the incident UV radiation arising from O stars in the association. Results compatible with the disk-locking scenario were verified for stars with low UV incidence, but no statistical significant relation between rotation and disk presence was verified for stars with high UV incidence suggesting that massive stars can have an important role on regulating the rotation of nearby low mass stars.Key words. infrared: stars -stars: variables: T Tauri -stars: low-mass -stars: formation -stars: pre main sequence -stars: rotation Use \titlerunning to supply a shorter title and/or \authorrunning to supply a shorter list of authors.

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“…We have used photometric data from 2MASS (Skrutskie et al 2006) and IPHAS (Barentsen et al 2014) to study its properties. We have selected 2MASS sources within 3 of the nominal center of the cluster, as given in SIMBAD.…”

Section: Berkeley 90 Photometrymentioning

confidence: 99%

The little-studied cluster Berkeley 90

Apellániz

Negueruela

Barbá

et al. 2015

A&A

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Context. It appears that most (if not all) massive stars are born in multiple systems. At the same time, the most massive binaries are hard to find owing to their low numbers throughout the Galaxy and the implied large distances and extinctions. Aims. We want to study LS III +46 11, identified in this paper as a very massive binary; another nearby massive system, LS III +46 12; and the surrounding stellar cluster, Berkeley 90. Methods. Most of the data used in this paper are multi-epoch high S/N optical spectra, although we also use Lucky Imaging and archival photometry. The spectra are reduced with dedicated pipelines and processed with our own software, such as a spectroscopicorbit code, CHORIZOS, and MGB. Results. LS III +46 11 is identified as a new very early O-type spectroscopic binary [O3.5 If* + O3.5 If*] and LS III +46 12 as another early O-type system [O4.5 V((f))]. We measure a 97.2-day period for LS III +46 11 and derive minimum masses of 38.80 ± 0.83 M and 35.60 ± 0.77 M for its two stars. We measure the extinction to both stars, estimate the distance, search for optical companions, and study the surrounding cluster. In doing so, a variable extinction is found as well as discrepant results for the distance. We discuss possible explanations and suggest that LS III +46 12 may be a hidden binary system where the companion is currently undetected.

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The second data release of the INT Photometric Hα Survey of the Northern Galactic Plane (IPHAS DR2)

Cited by 144 publications

References 86 publications

The Host Galaxy and Redshift of the Repeating Fast Radio Burst FRB 121102

The Host Galaxy and Redshift of the Repeating Fast Radio Burst FRB 121102

Near-infrared time-series photometry in the field of Cygnus OB2 association

The little-studied cluster Berkeley 90

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