Pulsars, transients and relativistic astrophysics

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The twisted jets of Circinus X-1

(2019)

Authors:

M Coriat, R Fender, C Tasse, O Smirnov, AK Tzioumis, JW Broderick
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K2 Observations of SN 2018oh Reveal a Two-component Rising Light Curve for a Type Ia Supernova

The Astrophysical Journal Letters American Astronomical Society 870:1 (2019) l1

Authors:

G Dimitriadis, RJ Foley, A Rest, D Kasen, AL Piro, A Polin, DO Jones, A Villar, G Narayan, DA Coulter, CD Kilpatrick, Y-C Pan, C Rojas-Bravo, OD Fox, SW Jha, PE Nugent, AG Riess, D Scolnic, MR Drout, G Barentsen, J Dotson, M Gully-Santiago, C Hedges, AM Cody, T Barclay, S Howell, P Garnavich, BE Tucker, E Shaya, R Mushotzky, RP Olling, S Margheim, A Zenteno, J Coughlin, JE Van Cleve, J Vinícius de Miranda Cardoso, KA Larson, KM McCalmont-Everton, CA Peterson, SE Ross, LH Reedy, D Osborne, C McGinn, L Kohnert, L Migliorini, A Wheaton, B Spencer, C Labonde, G Castillo, G Beerman, K Steward, M Hanley, R Larsen, R Gangopadhyay, R Kloetzel, T Weschler, V Nystrom, J Moffatt, M Redick, K Griest, M Packard, M Muszynski, J Kampmeier, R Bjella, S Flynn, B Elsaesser, KC Chambers, HA Flewelling, ME Huber, EA Magnier, CZ Waters, ASB Schultz, J Bulger, TB Lowe, M Willman, SJ Smartt, KW Smith, S Points, GM Strampelli, J Brimacombe, P Chen, JA Muñoz, RL Mutel, J Shields, PJ Vallely, S Villanueva, W Li, X Wang, J Zhang, H Lin, J Mo, X Zhao, H Sai, X Zhang, K Zhang, T Zhang, L Wang, J Zhang, E Baron, JM DerKacy, L Li, Z Chen, D Xiang, L Rui, L Wang, F Huang, X Li, G Hosseinzadeh, DA Howell, I Arcavi, D Hiramatsu, J Burke, S Valenti, JL Tonry, L Denneau, AN Heinze, H Weiland, B Stalder, J Vinkó, K Sárneczky, A Pál, A Bódi, Zs Bognár, B Csák, B Cseh, G Csörnyei, O Hanyecz, B Ignácz, Cs Kalup, R Könyves-Tóth, L Kriskovics, A Ordasi, I Rajmon, A Sódor, R Szabó, R Szakáts, G Zsidi, SC Williams, J Nordin, R Cartier, C Frohmaier, L Galbany, CP Gutiérrez, I Hook, C Inserra, M Smith, DJ Sand, JE Andrews, N Smith, C Bilinski
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Lasair: The Transient Alert Broker for LSST:UK

Research Notes of the AAS American Astronomical Society 3:1 (2019) 26

Authors:

KW Smith, RD Williams, DR Young, A Ibsen, SJ Smartt, A Lawrence, D Morris, S Voutsinas, M Nicholl
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Photometric and Spectroscopic Properties of Type Ia Supernova 2018oh with Early Excess Emission from the Kepler 2 Observations

The Astrophysical Journal American Astronomical Society 870:1 (2019) 12

Authors:

W Li, X Wang, J Vinkó, J Mo, G Hosseinzadeh, DJ Sand, J Zhang, H Lin, T Zhang, L Wang, J Zhang, Z Chen, D Xiang, L Rui, F Huang, X Li, X Zhang, L Li, E Baron, JM Derkacy, X Zhao, H Sai, K Zhang, L Wang, DA Howell, C McCully, I Arcavi, S Valenti, D Hiramatsu, J Burke, A Rest, P Garnavich, BE Tucker, G Narayan, E Shaya, S Margheim, A Zenteno, A Villar, G Dimitriadis, RJ Foley, Y-C Pan, DA Coulter, OD Fox, SW Jha, DO Jones, DN Kasen, CD Kilpatrick, AL Piro, AG Riess, C Rojas-Bravo, BJ Shappee, TW-S Holoien, KZ Stanek, MR Drout, K Auchettl, CS Kochanek, JS Brown, S Bose, D Bersier, J Brimacombe, P Chen, S Dong, S Holmbo, JA Muñoz, RL Mutel, RS Post, JL Prieto, J Shields, D Tallon, TA Thompson, PJ Vallely, S Villanueva, SJ Smartt, KW Smith, KC Chambers, HA Flewelling, ME Huber, EA Magnier, CZ Waters, ASB Schultz, J Bulger, TB Lowe, M Willman, K Sárneczky, A Pál, JC Wheeler, A Bódi, Zs Bognár, B Csák, B Cseh, G Csörnyei, O Hanyecz, B Ignácz, Cs Kalup, R Könyves-Tóth, L Kriskovics, A Ordasi, I Rajmon, A Sódor, R Szabó, R Szakáts, G Zsidi, P Milne, JE Andrews, N Smith, C Bilinski, PJ Brown, J Nordin, SC Williams, L Galbany, J Palmerio, IM Hook, C Inserra, K Maguire, Régis Cartier, A Razza, CP Gutiérrez, JJ Hermes, JS Reding, BC Kaiser, JL Tonry, AN Heinze, L Denneau, H Weiland, B Stalder, G Barentsen, J Dotson, T Barclay, M Gully-Santiago, C Hedges, AM Cody, S Howell, J Coughlin, JE Van Cleve, J Vinícius de Miranda Cardoso, KA Larson, KM McCalmont-Everton, CA Peterson, SE Ross, LH Reedy, D Osborne, C McGinn, L Kohnert, L Migliorini, A Wheaton, B Spencer, C Labonde, G Castillo, G Beerman, K Steward, M Hanley, R Larsen, R Gangopadhyay, R Kloetzel, T Weschler, V Nystrom, J Moffatt, M Redick, K Griest, M Packard, M Muszynski, J Kampmeier, R Bjella, S Flynn, B Elsaesser
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Studying the H-alpha line of the B[ e ] supergiant binary GG Carinae using high-cadence optical spectroscopy

Proceedings of the International Astronomical Union (2019) 123-124

Authors:

A Porter, K Blundell, S Lee

Abstract:

© International Astronomical Union 2019. We present a case study of GG Carinae (GG Car), a Galactic B[ e ] supergiant binary having significant eccentricity (0.28), based on Global Jet Watch spectroscopy data which has been collecting high-time-sampled optical spectra since early 2015. GG Car has so far not been observed in the X-ray band, however it is of similar phenomenology to known X-ray binaries and may therefore be an obscured X-ray source. We have discovered that the absorption component of the H-alpha line displays a '1/462-478-day period in both equivalent width and wavelength centroid indicating cycles in the dynamics of the circumstellar environment, such as precession of the circumbinary or circumprimary disk. Circumbinary disk precession is an as-of-yet underexplored origin of super-orbital variations in the X-ray flux of X-ray binaries, since the rate of precession is generally much longer than the orbital period of the inner binary.
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