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Is IGR J11014-6103 a Pulsar with the Highest Known Kick Velocity?
Rahoui, Farid; Bodaghee, Arash; Tomsick, John A. +4 more
We report on Chandra X-ray and Parkes radio observations of IGR J11014-6103, which is a possible pulsar wind nebula with a complex X-ray morphology and a likely radio counterpart. With the superb angular resolution of Chandra, we find evidence that a portion of the extended emission may be related to a bow shock due to the putative pulsar moving t…
Revealing the Millimeter Environment of the New FU Orionis Candidate HBC722 with the Submillimeter Array
Bourke, Tyler L.; Dunham, Michael M.; Chen, Xuepeng +3 more
We present 230 GHz Submillimeter Array continuum and molecular line observations of the newly discovered FU Orionis candidate HBC722. We report the detection of seven 1.3 mm continuum sources in the vicinity of HBC722, none of which corresponds to HBC722 itself. We compile infrared and submillimeter continuum photometry of each source from previou…
The reawakening of the sleeping X-ray pulsar XTE J1946+274
Wilms, J.; Ferrigno, C.; Pottschmidt, K. +9 more
We report on a series of outbursts of the high-mass X-ray binary XTE J1946+274 in 2010/2011 observed with INTEGRAL, RXTE, and Swift. We discuss possible mechanisms resulting in the extraordinary outburst behavior of this source. The X-ray spectra can be described by standard phenomenological models, enhanced by an absorption feature of unknown ori…
Disentangling AGN and Star Formation in Soft X-Rays
Ptak, A.; Heckman, T. M.; LaMassa, Stephanie M.
We have explored the interplay of star formation and active galactic nucleus (AGN) activity in soft X-rays (0.5-2 keV) in two samples of Seyfert 2 galaxies (Sy2s). Using a combination of low-resolution CCD spectra from Chandra and XMM-Newton, we modeled the soft emission of 34 Sy2s using power-law and thermal models. For the 11 sources with high s…
Winds and tides of Ligeia Mare, with application to the drift of the proposed time TiME (Titan Mare Explorer) capsule
Lorenz, Ralph D.; Tokano, Tetsuya; Newman, Claire E.
We use two independent General Circulation Models (GCMs) to estimate surface winds at Titan’s Ligeia Mare (78° N, 250° W), motivated by a proposed mission to land a floating capsule in this ∼500 km hydrocarbon sea. The models agree on the overall magnitude (∼0.5-1 m/s) and seasonal variation (strongest in summer) of windspeeds, but details of seas…
Discrete Mass Ejections from the Be/X-Ray Binary A0535+26/HD 245770
Li, Hui; Yan, Jingzhi; Liu, Qingzhong
We present long-term optical spectroscopic observations on the Be/X-ray binary A0535+26 from 1992 to 2010. Combined with the public V-band photometric data, we find that each giant X-ray outburst occurred in a fading phase of the optical brightness. The anti-correlation between the optical brightness and the Hα intensity during our 2009 observatio…
The LEGUE high latitude bright survey design for the LAMOST pilot survey
Xu, Yan; Lépine, Sébastien; Deng, Li-Cai +14 more
We describe the footprint and input catalog for bright nights in the LAMOST Pilot Survey, which began in October 2011. Targets are selected from two stripes in the north and south Galactic Cap regions, centered at δ = 29°, with 10° width in declination, covering right ascensions of 135° to 290° and -30° to 30° respectively. We selected spectroscop…
Complex particle acceleration processes in the hotspots of 3C 105 and 3C 445
Brunetti, G.; Prieto, M. A.; Massaro, F. +3 more
We investigate the nature of the broad-band emission associated with the low-power radio hotspots 3C 105 South and 3C 445 South. Both hotspot regions are resolved in multiple radio/optical components. High-sensitivity radio Very Large Array, near-infrared/optical Very Large Telescope and Hubble Space Telescope (HST) and X-ray Chandra data have bee…
An updated catalog of OH-maser-emitting planetary nebulae
Gómez, J. F.; Miranda, L. F.; Suárez, O. +1 more
Aims: We studied the characteristics of planetary nebulae (PNe) that show both OH maser and radio continuum emission (hereafter OHPNe). These have been proposed to be very young PNe, and therefore, they could be key objects for understanding the formation and evolution of PNe.
Methods: We consulted the literature searching for interferom…
A peculiar galaxy appears at redshift 11: properties of a moderate-redshift interloper
Hayes, Matthew; Schaerer, Daniel; Pelló, Roser +2 more
In 2011 Laporte et al. reported a very high redshift galaxy candidate: a lensed J-band dropout (A2667-J1). J1 has a photometric redshift of z= 9.6-12, the probability density function for which permits no low- or intermediate-z solution. We here report new spectroscopic observations of this galaxy with Very Large Telescope/X-Shooter, which show cl…