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Properties of the Compact H II Region Complex G-0.02-0.07
Morris, M. R.; Wang, Q. D.; Dong, H. +4 more
We present new extinction maps and high-resolution Paschen-alpha images of G-0.02-0.07, a complex of compact H II regions located adjacent to the M-0.02-0.07 giant molecular cloud, 6 pc in projection from the center of the Galaxy. These H II regions, which lie in projection just outside the boundary of the Sgr A East supernova remnant, represent o…
Early-type Galaxies at z ~ 1.3. II. Masses and Ages of Early-type Galaxies in Different Environments and Their Dependence on Stellar Population Model Assumptions
Demarco, R.; Tanaka, M.; Rosati, P. +14 more
We have derived masses and ages for 79 early-type galaxies (ETGs) in different environments at z ~ 1.3 in the Lynx supercluster and in the GOODS/CDF-S field using multi-wavelength (0.6-4.5 µm KPNO, Palomar, Keck, Hubble Space Telescope, Spitzer) data sets. At this redshift the contribution of the thermally pulsing asymptotic giant branch (TP…
Hubble Space Telescope Morphologies of z ~ 2 Dust-obscured Galaxies. II. Bump Sources
Le Floc'h, E.; Armus, L.; Dey, Arjun +11 more
We present Hubble Space Telescope imaging of 22 ultra-luminous infrared galaxies (ULIRGs) at z ≈ 2 with extremely red R - [24] colors (called dust-obscured galaxies, or DOGs) which have a local maximum in their spectral energy distribution (SED) at rest-frame 1.6 µm associated with stellar emission. These sources, which we call "bump DOGs," …
Reconstructing the Triaxiality of the Galaxy Cluster A1689: Solving the X-ray and Strong Lensing Mass Discrepancy
Limousin, Marceau; Morandi, Andrea; Pedersen, Kristian
We present the first determination of the intrinsic triaxial shapes and three-dimensional physical parameters of both dark matter (DM) and the intracluster medium for the galaxy cluster A1689. We exploit the novel method we recently introduced in order to infer the three-dimensional physical properties in triaxial galaxy clusters by combining join…
An Expanded Very Large Array and CARMA Study of Dusty Disks and Torii with Large Grains in Dying Stars
Sahai, R.; Sánchez Contreras, C.; Morris, M. R. +2 more
We report the results of a pilot multiwavelength survey in the radio continuum (X, Ka, and Q bands, i.e., from 3.6 cm to 7 mm) carried out with the Expanded Very Large Array (EVLA) in order to confirm the presence of very large dust grains in dusty disks and torii around the central stars in a small sample of post-asymptotic giant branch (pAGB) ob…
Dusty Blast Waves of Two Young Large Magellanic Cloud Supernova Remnants: Constraints on Post-shock Compression
Blair, William P.; Reynolds, Stephen P.; Points, Sean +9 more
We present results from mid-IR spectroscopic observations of two young supernova remnants (SNRs) in the Large Magellanic Cloud made with the Spitzer Space Telescope. We imaged SNRs B0509-67.5 and B0519-69.0 with Spitzer in 2005, and follow-up spectroscopy presented here confirms the presence of warm, shock-heated dust, with no lines present in the…
Critical Differences and Clues in Eta Car's 2009 Event
Humphreys, Roberta M.; Davidson, Kris; Mehner, Andrea +3 more
We monitored Eta Carinae with the Hubble Space Telescope WFPC2 and Gemini GMOS throughout the 2009 spectroscopic event, which was expected to differ from its predecessor in 2003. Here we report major observed differences between events and their implications. Some of these results were quite unexpected. (1) The UV brightness minimum was much deepe…
The Redshift and Nature of AzTEC/COSMOS 1: A Starburst Galaxy at z = 4.6
Kneib, J. -P.; Berta, S.; Lutz, D. +36 more
Based on broadband/narrowband photometry and Keck DEIMOS spectroscopy, we report a redshift of z = 4.64+0.06 -0.08 for AzTEC/COSMOS 1, the brightest submillimeter galaxy (SMG) in the AzTEC/COSMOS field. In addition to the COSMOS-survey X-ray to radio data, we report observations of the source with Herschel/PACS (100, 160 &mic…
The Deepest Hubble Space Telescope Color-Magnitude Diagram of M32. Evidence for Intermediate-age Populations
Monachesi, Antonela; Lauer, Tod R.; Dressler, Alan +4 more
We present the deepest optical color-magnitude diagram (CMD) to date of the local elliptical galaxy M32. We have obtained F435W and F555W photometries based on Hubble Space Telescope (HST) Advanced Camera for Surveys/High-Resolution Channel images for a region 110'' from the center of M32 (F1) and a background field (F2) about 320'' away from M32 …
Black Holes in Bulgeless Galaxies: An XMM-Newton Investigation of NGC 3367 and NGC 4536
Cheung, C. C.; Eracleous, Michael; Satyapal, S. +3 more
The vast majority of optically identified active galactic nuclei (AGNs) in the local universe reside in host galaxies with prominent bulges, supporting the hypothesis that black hole formation and growth is fundamentally connected to the buildup of galaxy bulges. However, recent mid-infrared spectroscopic studies with Spitzer of a sample of optica…