Search Publications
High Angular Resolution Multi-line Study of HH 1 and 2
Bally, J.; Raga, A. C.; Reipurth, Bo +2 more
We present new Hubble Space Telescope (HST) narrow band images of the bright Herbig-Haro (HH) objects HH 1 and 2 in the light of the Hα, Hβ, [O i] 6300, [O ii] 3726+28, [O iii] 5007 and [S ii] 6716+30 emission lines. The resulting emission and line ratio maps give an improved picture of the physical structure of these HH objects, showing the prese…
Swift J201424.9+152930: discovery of a new deeply eclipsing binary with 491-s and 3.4-h modulations
D'Avanzo, P.; Campana, S.; D'Elia, V. +13 more
We report on the discovery of a new X-ray pulsator, Swift J201424.9+152930 (Sw J2014). Owing to its X-ray modulation at 491 s, it was discovered in a systematic search for coherent signals in the archival data of the Swift X-ray Telescope. To investigate the nature of Sw J2014, we performed multiwavelength follow-up observations with space-borne (…
Forecast of a Daily Halo CME Occurrence Probability Depending on Class and Area Change of the Associated Sunspot
Moon, Yong-Jae; Lee, Jin-Yi; Lee, Kangjin
We investigate the halo (partial and full) coronal mass ejection (CME) occurrence probability depending on class and area change of the associated sunspot using front-side halo CMEs from 1996 to 2011. We select the most halo CME-productive 14 sunspot classifications: Cao, Cko, Dai, Dao, Dko, Dki, Dkc, Eao, Eai, Eko, Eki, Ekc, Fki, and Fkc. For eac…
Early science with the Large Millimeter Telescope: dust constraints in a z ∼ 9.6 galaxy
Yun, M. S.; Pope, A.; Dunlop, J. S. +8 more
Recent observations with the GISMO (Goddard-IRAM Superconducting 2 Millimeter Observer) 2 mm camera revealed a detection 8 arcsec away from the lensed galaxy MACS1149-JD1 at z = 9.6. Within the 17.5 arcsec FWHM GISMO beam, this detection is consistent with the position of the high-redshift galaxy and therefore, if confirmed, this object could be c…
New Precision Orbits of Bright Double-Lined Spectroscopic Binaries. IX. HD 54371, HR 2692, and 16 Ursa Majoris
Williamson, Michael H.; Fekel, Francis C.; Muterspaugh, Matthew W. +3 more
With extensive sets of new radial velocities we have determined orbital elements for three previously known spectroscopic binaries, HD 54371, HR 2692, and 16 UMa. All three systems have had the lines of their secondaries detected for the first time. The orbital periods range from 16.24 to 113.23 days, and the three binaries have modestly or modera…
Plasma waves around separatrix in collisionless magnetic reconnection with weak guide field
Ji, Hantao; Xiao, Chijie; Fujimoto, Keizo +1 more
Electrostatic and electromagnetic waves excited by electron beam around the separatrix region are analyzed in detail during the collisionless magnetic reconnection with a weak guide field by using 2-D particle-in-cell simulation with the adaptive mesh refinement. Broadband electrostatic waves are excited both in the inflow and outflow regions arou…
The spectral energy distribution of galaxies at z > 2.5: Implications from the Herschel/SPIRE color-color diagram
Buat, Véronique; Burgarella, Denis; Hou, Jinliang +5 more
We use the Herschel SPIRE color-color diagram to study the spectral energy distribution (SED) and the redshift estimation of high-z galaxies. We compiled a sample of 57 galaxies with spectroscopically confirmed redshifts and SPIRE detections in all three bands at z = 2.5-6.4, and compared their average SPIRE colors with SED templates from local an…
Evolution of Mars' northern polar seasonal CO2 deposits: Variations in surface brightness and bulk density
Titus, Timothy N.; Mount, Christopher P.
Small-scale variations of seasonal ice are explored at different geomorphic units on the Northern Polar Seasonal Cap (NPSC). We use seasonal rock shadow measurements, combined with visible and thermal observations, to calculate density over time. The coupling of volume density and albedo allows us to determine the microphysical state of the season…
3D hydrodynamic simulations of the Galactic supernova remnant CTB 109
Sasaki, M.; Breitschwerdt, D.; Bolte, J.
Context. Using detailed 3D hydrodynamic simulations we study the nature of the Galactic supernova remnant (SNR)
Aims: Our model has been designed to explain the observed morphology, with a special…
Detection of hydroxyl-bearing exposures of possible magmatic origin on the central peak of crater Theophilus using Chandrayaan-1 Moon Mineralogy Mapper (M3) data
Chauhan, Mamta; Bhattacharya, Satadru; Chauhan, Prakash +3 more
High-resolution spectral and spatial data analyses of crater Theophilus revealed the presence of hydroxyl-bearing exposures of possible magmatic origin on its central peak in association with olivine-, spinel- and crystalline plagioclase-bearing lithologies. Hydroxyl-bearing lithologies at Theophilus central peak are characterized primarily by a p…