209 citations · 713 across the 13 of their papers we have counts for
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Chandra Observation of the Edge-on Spiral NGC 5775: Probing the Hot Galactic Disk/Halo Connection
J. T. Li, Z. Y. Li, Q. D. Wang +2
We study the edge-on galaxy NGC 5775, utilizing a 58.2 ks {\sl Chandra} ACIS-S observation together with complementary {\sl HST} ACS, {\sl Spitzer} IRAC and other multi-wavelength…
HST/ACS Observations of Star Formation Driven Outflows in Nearby Edge-on Spiral Galaxies: Dependence of Halo Morphology on Star Formation Activity
Joern Rossa, Michael Dahlem, Ralf-Juergen Dettmar +1
(Abridged). We present new high spatial resolution narrowband imaging observations of extraplanar diffuse ionized gas (eDIG) in four late-type, actively star forming edge-on spiral…
The Toomre Sequence Revisited with HST/NICMOS: Nuclear Brightness Profiles and Colors of Interacting and Merging Galaxies
Joern Rossa, Seppo Laine, Roeland P. van der Marel +4
We discuss the near-infrared properties of the nuclei in the 11 merging galaxies of the Toomre sequence, based on high spatial resolution J, H, and K imaging data using NICMOS onbo…
Nuclear Star Clusters (Nuclei) in Spiral Galaxies and Connection to Supermassive Black Holes
Roeland P. van der Marel, Joern Rossa, Carl Jakob Walcher +4
HST observations have revealed that compact sources exist at the centers of many, maybe even most, galaxies across the Hubble sequence. These sources are called "nuclei" or also "n…
The morphology of minor axis gaseous outflows in edge-on Seyfert galaxies
T. P. Robitaille, J. Rossa, D. J. Bomans +1
(Abridged) Spiral galaxies often have extended outflows that permeate beyond the region of the disk. Such outflows have been seen both in starburst galaxies, actively star forming…
HST/STIS Spectra of Nuclear Star Clusters in Spiral Galaxies: Dependence of Age and Mass On Hubble Type
Joern Rossa, Roeland P. van der Marel, Torsten Boeker +5
(Abridged) We study the nuclear star clusters in spiral galaxies of various Hubble types using spectra obtained with STIS on-board HST. We observed the nuclear clusters in 40 galax…
A Hubble Space Telescope WFPC2 Investigation of the Disk-Halo Interface in NGC891
Joern Rossa, Ralf-Juergen Dettmar, Rene A. M. Walterbos +1
We present deep narrowband observations with high spatial resolution of extraplanar diffuse ionized gas in the halo of NGC891, obtained with the WFPC2 on-board the HST. Our H-alpha…
Hubble Space Telescope/WFPC2 Investigation of the Nuclear Morphology in the Toomre Sequence of Merging Galaxies
Seppo Laine, Roeland P. van der Marel, Joern Rossa +4
We report on the properties of nuclear regions in the Toomre Sequence of merging galaxies, based on imaging data gathered with the Hubble Space Telescope WFPC2 camera. We have imag…
An H-alpha survey aiming at the detection of extraplanar diffuse ionized gas in halos of edge-on spiral galaxies II. The H-alpha survey atlas and catalog
Joern Rossa, Ralf-Juergen Dettmar
In this second paper on the investigation of extraplanar diffuse ionized gas in nearby edge-on spiral galaxies we present the actual results of the individual galaxies of our H-alp…
An H-alpha survey aiming at the detection of extraplanar diffuse ionized gas in halos of edge-on spiral galaxies. I. How common are gaseous halos among non-starburst galaxies?
Joern Rossa, Ralf-Juergen Dettmar
In a series of two papers we present results of a new H-alpha imaging survey, aiming at the detection of extraplanar diffuse ionized gas in halos of late-type spiral galaxies. We h…
The feedback of massive stars on the ISM: XMM-Newton view of the LMC superbubble N51D
Dominik J. Bomans, Joern Rossa, Kerstin Weis +1
N51D (= DEM L 192) appears at first glance as a nearly circular, 120pc diameter bubble of ionized gas around the LMC OB association LH 54. A deeper look reveals a complex web of fi…
Extraplanar diffuse ionized gas in a small sample of nearby edge-on galaxies
J. Rossa, R. -J. Dettmar
We present narrowband H-alpha imaging data of a small survey of nearby edge-on spiral galaxies, aiming at the detection of `extraplanar' diffuse ionized gas (DIG). A few of our stu…
Two new quasars at z=1.90 and z=0.15 from the Calan-Tololo Survey
J. Rossa, C. Tappert, Th. Augusteijn +1
We present the discovery of two new quasars, that initially appeared as candidate cataclysmic variables (CVs) in a list of the Calan-Tololo objective prism survey. However, additio…