Search Publications
Discovery of a Very Large (≈20 kpc) Galaxy at z = 3.72
Inami, Hanae; Reddy, Naveen; Dey, Arjun +12 more
We report the discovery and spectroscopic confirmation of a very large star-forming galaxy, G6025, at {z}spec} =3.721+/- 0.003. In the rest frame ≈2100 Å, G6025 subtends ≈24 kpc in physical extent when measured from the 1.5σ isophote, in agreement with the parametric size measurements that yield a half-light radius of 4.9 ± 0.5 kpc and …
The First Orbital Period of a Very Bright and Fast Nova in M31: M31N 2013-01b
Mereghetti, Sandro; Salvaterra, Ruben; De Luca, Andrea +5 more
We present the first X-ray and UV/optical observations of a very bright and fast nova in the disk of M31, M31N 2013-01b. The nova reached a peak magnitude R ∼ 15 mag and decayed by 2 mag in only 3 days, making it one of the brightest and fastest novae ever detected in Andromeda. From archival multiband data we have been able to trace its fast evol…
The Effects of Barycentric and Asymmetric Transverse Velocities on Eclipse and Transit Times
Stassun, Keivan G.; Prša, Andrej; Conroy, Kyle E. +1 more
It has long been recognized that the finite speed of light can affect the observed time of an event. For example, as a source moves radially toward or away from an observer, the path length and therefore the light travel time to the observer decreases or increases, causing the event to appear earlier or later than otherwise expected, respectively.…
SOFIA/HAWC+ Detection of a Gravitationally Lensed Starburst Galaxy at z = 1.03
Staguhn, Johannes; Dowell, C. Darren; Fadda, Dario +13 more
We present the detection at 89 µm (observed frame) of the Herschel-selected gravitationally lensed starburst galaxy HATLAS J1429-0028 (also known as G15v2.19) in 15 minutes with the High-resolution Airborne Wideband Camera-plus (HAWC+) onboard the Stratospheric Observatory for Infrared Astronomy (SOFIA). The spectacular lensing system consis…
Probing Signatures of a Distant Planet around the Young T-Tauri Star CI Tau Hosting a Possible Hot Jupiter
Hashimoto, Jun; Konishi, Mihoko; Hori, Yasunori
We search for signatures of a distant planet around the two million-year-old classical T-Tauri star CI Tau hosting a hot-Jupiter candidate ({M}{{p}}\sin i∼ 8.1 {M}Jupiter}) in an eccentric orbit (e ∼ 0.3). To probe the existence of an outer perturber, we reanalyzed 1.3 mm dust continuum observations of the protoplanetary disk…
Detections of Massive Stars in the Cluster MCM2005b77, in the Star-forming Regions GRS G331.34-00.36 (S62) and GRS G337.92-00.48 (S36)
Menten, Karl M.; Rich, R. Michael; Figer, Donald F. +2 more
Large infrared and millimeter wavelength surveys of the Galactic plane have unveiled more than 600 new bubble H II regions and more than 3000 candidate star clusters. We present a study of the candidate clusters MCM2005b72, DBS2003-157, DBS2003-172, and MCM2005b77 based on near-infrared spectroscopy taken with SofI on the NTT and infrared photomet…
The LABOCA/ACT Survey of Clusters at All Redshifts: Multiwavelength Analysis of Background Submillimeter Galaxies
Hilton, Matt; Bond, J. Richard; Dünner, Rolando +12 more
We present a multiwavelength analysis of 48 submillimeter galaxies (SMGs) detected in the Large APEX Bolometer Camera/Atacama Cosmology Telescope (ACT) Survey of Clusters at All Redshifts, LASCAR, which acquired new 870 µm and Australia Telescope Compact Array 2.1 GHz observations of 10 galaxy clusters detected through their Sunyaev-Zel’dovi…
Chromospheric Response during the Precursor and the Main Phase of a B6.4 Flare on 2005 August 20
Awasthi, Arun Kumar; Liu, Rui; Berlicki, Arkadiusz +2 more
Solar flare precursors depict a constrained rate of energy release, in contrast to the imminent rapid energy release, which calls for a different regime of plasma processes to be at play. Due to the subtle emission during the precursor phase, its diagnostics remain delusive, revealing either nonthermal electrons (NTEs) or thermal conduction to be …
ALMA Observation of NGC 5135: The Circumnuclear CO (6-5) and Dust Continuum Emission at 45 pc Resolution
Inami, Hanae; van der Werf, Paul; Gao, Yu +10 more
We present high-resolution (0.″17 × 0.″14) Atacama Large Millimeter/submillimeter Array (ALMA) observations of the CO (6-5) line and 435 µm dust continuum emission within a ∼9″ × 9″ area centered on the nucleus of the galaxy NGC 5135. NGC 5135 is a well-studied luminous infrared galaxy that also harbors a Compton-thick active galactic nucleu…
Particles Co-orbital to Janus and to Epimetheus: A Firefly Planetary Ring
Sfair, Rafael; Winter, Othon C.; Souza, Alexandre P. S. +3 more
The Cassini spacecraft found a new and unique ring that shares the trajectory of Janus and Epimetheus, co-orbital satellites of Saturn. Performing image analysis, we found this to be a continuous ring. Its width is between 30% and 50% larger than previously announced. We also verified that the ring behaves like a firefly. It can only be seen from …