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A large, deep 3 deg2 survey of H α, [O iii], and [O ii] emitters from LAGER: constraining luminosity functions

Khostovan, A. A.; Malhotra, S.; Rhoads, J. E.; Jiang, C.; Wang, J.; Wold, I.; Zheng, Z. Y.; Barrientos, Luis Felipe.; Coughlin, A.; Harish, S.; Hu, W.; Infante Lira, Leopoldo; Perez, L. A.; Pharo, J.; Valdes, F.; Walker, A. R.; Yan, H. (OUP, 2020)

We present our measurements of the H α, [O iii], and [O ii] luminosity functions as part of the Lyman Alpha Galaxies at Epoch of Reionization (LAGER) survey using our samples of 1577 z = 0.47 H α-, 3933 z = 0.93 [O iii]-, ...
BAT AGN spectroscopic survey – XV: the high frequency radio cores of ultra-hard X-ray selected AGN

Smith, K. L.; Mushotzky, R. F.; Koss, M.; Trakhtenbrot, B.; Ricci, C.; Wong, O. I.; Bauer, F. E.; Ricci, F.; Vogel, S.; Stern, D.; Powell, M. C.; Urry, C. M.; Harrison, F.; Mejia-Restrepo, J.; Oh, K.; Baek, J.; Chun, A. (OUP, 2019)

We have conducted 22 GHz radio imaging at 1 arcsec resolution of 100 low-redshift AGN selected at 14–195 keV by the Swift-BAT. We find a radio core detection fraction of 96 per cent, much higher than lower frequency radio ...
Clues on Arp 142: The spiral–elliptical merger

Mora, Marcelo D.; Torres-Flores, S.; Firpo, V.; Hernandez-Jimenez, J. A.; Urrutia-Viscarra, F.; Mendes de Oliveir, C. (OUP, 2019)

Nearby merging pairs are unique laboratories in which one can study the gravitational effects on the individual interacting components. In this manuscript, we report the characterization of selected H II regions along the ...
Colliding winds in and around the stellar group IRS 13E at the galactic centre

Wang, Q. Daniel; Li, J.; Russel, C. M. P.; Cuadra Stipetich, Jorge Rodrigo (OUP, 2019)

IRS 13E is an enigmatic compact group of massive stars located in projection only 3.6 arcsec away from Sgr A*. This group has been suggested to be bounded by an intermediate-mass black hole (IMBH). We present a multiwavelength ...
Discovery of optical outflows and inflows in the black hole candidate GRS 1716−249

Cúneo, V. A.; Muñoz-Darias, T.; Sánchez-Sierras, J.; Jiménez-Ibarra, F.; Armas Padilla, M.; Buckle, D. A. H.; Casares, J.; Charles, P.; Corral-Santana, J. M.; Fender, R.; Fernández-Ontiveros, J. A.; Mata Sánchez, D.; Panizo-Espinar, G.; Ponti, G.; Torr, M. A. P. (2020)

We present optical spectroscopy obtained with the GTC, VLT, and SALT telescopes during the decline of the 2016â€“2017 outburst of the black hole candidate GRS 1716âˆ’249 (Nova Oph 1993). Our 18-epoch data set spans 6 months ...
Following the crumbs: statistical effects of ram pressure in galaxies

Rodríguez, S.; Garcia Lambas, D.; Padilla, Nelson; Troncoso-Iribarre, P. (OUP, 2019)

We analyse the presence of dust around galaxy group members through the reddening of background quasars. By taking into account quasar colour and their dependence on redshift and angular position, we derive mean quasar ...
Galaxy And Mass Assembly (GAMA): the signatures of galaxy interactions as viewed from small-scale galaxy clustering

Gunawardhan, M. L. P.; Norberg, P.; Zehavi, I.; Farrow, D. J.; Loveday, J.; Hopkins, A. M.; Davie, L. J. M.; Wang, L.; Alpaslan, M.; Bland-Hawthorn, J.; Brough, S.; Holwerda, B. W.; Owers, M. S.; Wrigh, A. H. (2018)

Statistical studies of galaxy-galaxy interactions often utilize net change in physical properties of progenitors as a function of the separation between their nuclei to trace both the strength and the observable time-scale ...
Mid-infrared imaging- and spectro-polarimetric subarcsecond observations of NGC 1068

Lopez-Rodriguez, E.; Packham, C.; Roche, P. F.; Alonso-Herrero, A.; Díaz-Santos, T.; Nikutta, R.; González-Martín, O.; Á lvarez, C. A.; Esquej, P.; Espinos, J. M. R.; Perlman, E.; Ramos Almeida, C.; Telesc, C. M. (2016)

We present subarcsecond 7.5â€“13 Î¼m imaging- and spectro-polarimetric observations of NGC 1068 using CanariCam on the 10.4-m Gran Telescopio CANARIAS. At all wavelengths, we find: (1) A 90 Ã— 60Â pc extended polarized ...
Multiple stellar populations in the globular cluster M3 (NGC 5272): a Strömgren perspective

Massari, D.; Lapenna, E.; Bragaglia, A.; Dalessandro, E.; Contreras Ramos, Rodrigo Andrés; Amigo Fuentes, Pía. (OUP, 2016)

We present Strömgren photometry of the Galactic Globular Cluster M3 to study its multiple generations phenomenon. The use of different colour–magnitude diagrams (CMDs) and especially of the notoriously efficient c y index ...
NuSTAR observations of four nearby X-ray faint AGNs: low luminosity or heavy obscuration?

Annuar, A.; Alexander, D. M.; Gandhi, P.; Lansbury, G. B.; Asmus, D.; Balokovic, M.; Ballantyne, D. R.; Bauer, Franz Erik; Boorman, P. G.; Brandt, W. N.; Brightman, M.; Chen, C. T. J.; Del Moro, A.; Farrah, D.; Harrison, F. A.; Koss, M. J.; Lanz, L.; Marchesi, S.; Masini, A.; Nardini, E.; Ricci, C.; Stern, D.; Zappacosta, L. (OUP, 2020)

We present NuSTAR (Nuclear Spectroscopic Telescope Array) observations of four active galactic nuclei (AGNs) located within 15 Mpc. These AGNs, namely ESO 121-G6, NGC 660, NGC 3486, and NGC 5195, have observed X-ray ...
Probing the circumnuclear absorbing medium of the buried AGN in NGC 1068 through NuSTAR observations

Zaino, A.; Bianchi, S.; Marinucci, A.; Matt, G.; Bauer, Franz Erik; Brandt, W. N.; Gandhi, P.; Guainazzi, M.; Iwasawa, K.; Puccetti, S.; Ricci, C.; Walton, D. J. (OUP, 2019)

We present the results of the latest NuSTAR monitoring campaign of the Compton-thick Seyfert 2 galaxy NGC 1068, composed of four ∼50 ks observations performed between 2017 July and 2018 February to search for flux and ...
Recovering variable stars in large surveys: EAup Algol-type class in the Catalina Survey

Carmo, A.; Ferreira Lopes, C. E.; Papageorgiou, A.; Jablonski, F. J.; Rodrigues, C. V.; Drake, A. J.; Cros, N. J. G.; Catelan, Márcio (OUP, 2020)

The discovery and characterization of Algol eclipsing binaries (EAs) provide an opportunity to contribute for a better picture of the structure and evolution of low-mass stars. However, the cadence of most current photometric ...
Scalable end-to-end recurrent neural network for variable star classification

Becker Troncoso, Ignacio; Pichara Baksai, Karim Elías; Catelan, Márcio; Protopapas, P.; Aguirre Orellana, Carlos Alfonso; Nikzat, Fatemeh (OUP, 2020)

During the last decade, considerable effort has been made to perform automatic classification of variable stars using machine-learning techniques. Traditionally, light curves are represented as a vector of descriptors or ...
Sea surface network optimization for tsunami forecasting in the near field: application to the 2015 Illapel earthquake

Navarrete, P.; Cienfuegos Carrasco, Rodrigo Alberto; Satake, K.; Wang, Y.; Urrutia, A.; Benavente, R.; Catalan, P. A.; Crempien de la Carrera, Jorge; Mulia, I. (OUP, 2019)

We propose a method for defining the optimal locations of a network of tsunameters in view of near real-time tsunami forecasting using sea surface data assimilation in the near and middle fields, just outside of the source ...
Spectral analysis of the quiescent low-mass X-ray binary in the globular cluster M30

Echiburú, C. S.; Guillot, S.; Zhao, Y.; Heinke, C. O.; Ozel, F.; Web, N. A. (2020)

We present a recent Chandra observation of the quiescent low-mass X-ray binary containing a neutron star (NS), located in the globular cluster M30. We fit the thermal emission from the NS to extract its mass and radius. ...
Stellar streams around the Magellanic Clouds in 4D

Navarrete Silva, Camila Andrea; Belokurov, V.; Catelan, Márcio; Jethwa, P.; Koposov, S. E.; Carballo-Bello, J. A.; Jofré, P.; Erkal, D.; Duffau, S.; Corral-Santan, J. M. (OUP, 2018)

We carried out a spectroscopic follow-up programme of the four new stellar stream candidates detected by Belokurov & Koposov in the outskirts of the Large Magellanic Cloud (LMC) using FORS2 (VLT). The medium-resolution ...
Streaming classification of variable stars

Zorich, L; Pichara Baksai, Karim Elías; Protopapas, P. (OUP, 2019)

In the last years, automatic classification of variable stars has received substantial attention. Using machine learning techniques for this task has proven to be quite useful. Typically, machine learning classifiers used ...
The chemical compositions of accreted and in situ galactic globular clusters according to SDSS/APOGEE

Horta, D.; Schiavon, R. P.; Mackereth, J. T.; Beers, T. C.; Fernández-Trincado, J. G.; Frinchaboy, P. M.; García-Hernández, D. A.; Geisler, D.; Hasselquist, S.; JÃ¶nsson, H.; Lane, R. R.; Majewski, S. R.; MÃ©szÃ¡ros, S.; Bidin, C. M.; Nataf, D. M.; Roman-Lopes, A.; Nitschelm, C.; Vargas-González, J.; Zasowsk, G. (2020)

Studies of the kinematics and chemical compositions of Galactic globular clusters (GCs) enable the reconstruction of the history of star formation, chemical evolution, and mass assembly of the Galaxy. Using the latest data ...
The Next Generation Fornax Survey (NGFS): VII. A MUSE view of the nuclear star clusters in Fornax dwarf galaxies

Johnston, E. J.; Puzia, Thomas H.; D'Ago, Giuseppe; Eigenthaler, Paul; Galaz, Gaspar; Häußler, B.; Mora Genskowsky, Marcelo Daniel; Ordenes-Briceño, Y.; Rong, Y.; Spengler, C.; Vogt, F.; Côté, P.; Grebel, E. K.; Hilker, M.; Mieske, S.; Miller, B.; Sánchez-Janssen, R.; Taylor, M. A.; Zhan, Hong-Xin (OUP, 2020)

Clues to the formation and evolution of nuclear star clusters (NSCs) lie in their stellar populations. However, these structures are often very faint compared to their host galaxy, and spectroscopic analysis of NSCs is ...
The shape of SN 1993J re-analysed

Stevance, H. F.; Baade, D.; Bruten, J. R.; Cikota, A.; Clocchiatti, Alejandro; Hines, D. C.; Höflich, P.; Maund, J. R.; Patat, F.; Vallely, P. J.; Wheeler, J. C. (OUP, 2020)

SN 1993J is one of the best-studied Type IIb supernovae. Spectropolarimetric data analyses were published over two decades ago at a time when the field of supernova spectropolarimetry was in its infancy. Here, we present ...

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