Search Publications
Optical Transmission Spectra of Hot Jupiters: Effects of Scattering
Tinetti, Giovanna; Sengupta, Sujan; Chakrabarty, Aritra
We present new grids of transmission spectra for hot Jupiters by solving the multiple-scattering radiative transfer equations with non-zero scattering albedo instead of using the Beer-Bouguer-Lambert law for the change in the transmitted stellar intensity. The diffused reflection and transmission due to scattering increase the transmitted stellar …
A Photoionized Accretion Disk around a Young High-mass Star
Sanhueza, Patricio; Garay, Guido; Guzmán, Andrés E. +2 more
We present high spatial resolution (52 au) observations of the high-mass young stellar object (HMYSO) G345.4938+01.4677 made using the Atacama Large Millimeter/submillimeter Array. This O-type HMYSO is located at 2.38 kpc and is associated with a luminosity of 1.5 × 105 L⊙. We detect circumstellar emission from the H38β hydro…
Using the "Ghost Front" to Predict the Arrival Time and Speed of CMEs at Venus and Earth
Wang, Yuming; Shen, Chenglong; Lockwood, Mike +7 more
Using in situ measurements and remote-sensing observations, we study two coronal mass ejections (CMEs) that left the Sun on 2012 June 13-14 and impacted both Venus and Earth while the planets were in close radial alignment. The two CMEs generate multiple fronts in Solar Terrestrial Relations Observatory (STEREO)/Heliospheric Imager (HI) images, wh…
Star Formation and Evolution of Blister-type H II Region Sh2-112
Bhatt, B. C.; Dewangan, L. K.; Ojha, D. K. +4 more
We report the observational findings of the Sh2-112 H II region by using the multiwavelength data analysis ranging from optical to radio wavelengths. This region is powered by the massive O8V-type star BD +45 3216. The surface density distribution and minimum spanning tree analyses of the young stellar object (YSO) candidates in the region reveal …
Cross-correlation of Far-infrared Background Anisotropies and CMB Lensing from Herschel and Planck Satellites
Gong, Yan; Cooray, Asantha; Chen, Xuelei +3 more
The cosmic infrared background (CIB) anisotropies and cosmic microwave background (CMB) lensing are powerful measurements for exploring cosmological and astrophysical problems. In this work, we measure the autocorrelation power spectrum of the CIB anisotropies in the Herschel-SPIRE HerMES Large Mode Survey (HeLMS) field, and the cross-power spectr…
IRIS Observations of the Low-atmosphere Counterparts of Active Region Outflows
Polito, Vanessa; Testa, Paola; De Pontieu, Bart +2 more
Active region (AR) outflows have been studied in detail since the launch of Hinode/EIS and are believed to provide a possible source of mass and energy to the slow solar wind. In this work, we investigate the lower atmospheric counterpart of AR outflows using observations from the Interface Region Imaging Spectrograph (IRIS). We find that the IRIS…
Magnetic Reconnection Invoked by Sweeping of the CME-driven Fast-mode Shock
Lin, Jun; Wang, Jingxiu; Zhang, Yuzong +4 more
Coronal waves exist ubiquitously in the solar atmosphere. They are important not only because of their rich physics but also because they are essential candidates for triggering remote magnetic eruptions. However, the latter mechanism has never been directly confirmed. By revisiting the successive eruptions on 2012 March 7, fast-mode shocks are id…
Optical and Infrared Study of the Obscured B[e] Supergiant High-mass X-Ray Binary IGR J16318-4848
Chaty, Sylvain; Fortin, Francis; Sander, Andreas
The supergiant high-mass X-ray binary IGR J16318-4848 was the first source detected by the INTErnational Gamma-Ray Astrophysics Laboratory satellite in 2003 and distinguishes itself by its high intrinsic absorption and B[e] phenomenon. It is the perfect candidate to study both binary interaction and the environment of supergiant B[e] stars. This s…
A Systematic Study of Galactic Outflows via Fluorescence Emission: Implications for Their Size and Structure
Heckman, Timothy M.; Wang, Bingjie; Norman, Colin A. +1 more
Galactic outflows play a major role in the evolution of galaxies, but the underlying physical processes are poorly understood. This is mainly because we have little information about the outflow structure, especially on large scales. In this paper, we probe the structure of galactic outflows in low-z starbursts using a combination of ultraviolet s…
New Light on an Old Problem of the Cores of Solar Resonance Lines
Judge, Philip G.; Leenaarts, Jorrit; Kleint, Lucia +2 more
We reexamine a 50+ yr old problem of deep central reversals predicted for strong solar spectral lines, in contrast to the smaller reversals seen in observations. We examine data and calculations for the resonance lines of H I, Mg II, and Ca II, the self-reversed cores of which form in the upper chromosphere. Based on 3D simulations, as well as dat…