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We investigate the multi-phase gas surrounding QSOs traced by 33 absorption lines (e.g., Ly$\alpha$, C\,\textsc{iv}, Fe\,\textsc{ii}, Mg\,\textsc{ii}, etc.) in the stacked spectra of background sources, using the early data release from the…

Astrophysics of Galaxies · Physics 2025-06-18 Zeyu Chen , Enci Wang , Hu Zou , Haoran Yu , Zhicheng He , Huiyuan Wang , Yang Gao , Cheqiu Lyu , Cheng Jia , Chengyu Ma , Weiyu Ding , Runyu Zhu , Xu Kong

We present the observational results of our search for emission-line galaxies (ELG) towards nearby voids. In order to find ELG, we started a survey using the IIIa-J objective prism plates from the Hamburg QSO Survey. The plates are…

Astrophysics · Physics 2016-08-30 Cristina C. Popescu , Ulrich Hopp , Hans J. Hagen , Hans Elsaesser

Using newly obtained high-resolution data ($R\sim{1\times{10}^{5}}$) from the \textit{Hubble Space Telescope}, and archival UV data from the \textit{Far Ultraviolet Spectroscopic Explorer} we have conducted a detailed UV survey of the three…

Solar and Stellar Astrophysics · Physics 2019-06-12 S. P. Preval , M. A. Barstow , M. Bainbridge , N. Reindl , T. Ayres , J. B. Holberg , J. D. Barrow , C. C. Lee , J. K. Webb , J. Hu

Ultraviolet flare emission can drive photochemistry in exoplanet atmospheres and even serve as the primary source of uncertainty in atmospheric retrievals. Additionally, flare energy budgets are not well-understood due to a paucity of…

We carried out a search for new infrared star clusters, stellar groups and candidates using WISE images, which are very sensitive to dust emission nebulae. We report the discovery of 437 embedded clusters and stellar groups that show a…

Solar and Stellar Astrophysics · Physics 2015-03-27 Denilso Camargo , Eduardo Bica , Charles Bonatto

We present an analysis of the Far Ultraviolet Spectroscopic Explorer (FUSE) spectrum of the ultramassive (M = 1.31 solar mass), magnetic (B_s = 2.3 MG) white dwarf PG 1658+441. The far ultraviolet (FUV) spectrum exhibits very broad Lyman…

Astrophysics · Physics 2009-11-10 J. Dupuis , P. Chayer , S. Vennes , G. Hebrard , N. F. Allard

We report the results of a search for large velocity width, low-intensity line wings - a commonly used signature of molecular outflows - in four low redshift (ultra)luminous infrared galaxies (U/LIRGs) that appear to be dominated by star…

Astrophysics of Galaxies · Physics 2015-09-23 Adam K. Leroy , Fabian Walter , Roberto Decarli , Alberto Bolatto , Laura Zschaechner , Axel Weiss

We describe the observations and preliminary results of the gas-phase analysis based on two ongoing, wide-field Integral Field Spectroscopy (IFS) surveys: the PPAK IFS Nearby Galaxies Survey (PINGS), targeting disc galaxies; and the…

Cosmology and Nongalactic Astrophysics · Physics 2015-03-19 F. F. Rosales-Ortega , S. Arribas , R. C. Kennicutt

Initial results, techniques, and rationale for a near-infrared survey of evolved emission-line stars toward the Galactic Center are presented. We use images taken through narrow-band emission-line and continuum filters to select candidates…

Astrophysics · Physics 2007-05-23 N. L. Homeier , R. D. Blum , P. S. Conti , A. Damineli

The \emph{Wide-field Infrared Survey Explorer} has surveyed the entire sky at four infrared wavelengths with greatly improved sensitivity and spatial resolution compared to its predecessors, the \emph{Infrared Astronomical Satellite} and…

Young Galactic supernova remnants (SNRs) are where we can observe closely the supernova (SN) ejecta and its interaction with circumstellar/interstellar medium. Therefore, they provide an opportunity to explore the explosion and the final…

Astrophysics of Galaxies · Physics 2016-12-30 Bon-Chul Koo , Yong-Hyun Lee

We obtained 0.8-2.4 micron spectra at a resolution of 320 km/s of four narrow-line Seyfert 1 galaxies in order to study the near-infrared properties of these objects. We focus on the analysis of the FeII emission in that region and the…

Astrophysics · Physics 2009-11-07 A. Rodriguez-Ardila , S. M. Viegas , M. G. Pastoriza , L. Prato

In this paper, we present the first extended catalogue of far-infrared fluxes of Galactic bubbles. Fluxes were estimated for 1814 bubbles, defined here as the `golden sample', and were selected from the Milky Way Project First Data Release…

Astrophysics of Galaxies · Physics 2017-12-06 F. Bufano , P. Leto , D. Carey , G. Umana , C. Buemi , A. Ingallinera , A. Bulpitt , F. Cavallaro , S. Riggi , C. Trigilio , S. Molinari

We performed spectroscopic observations for a large infrared QSO sample with a total of 25 objects. The sample was compiled from the QDOT redshift survey, the 1 Jy ULIRGs survey and a sample obtained by a cross-correlation study of the IRAS…

Astrophysics · Physics 2009-11-07 X. Z. Zheng , X. Y. Xia , S. Mao , H. Wu , Z. G. Deng

The interstellar abundances of D I, N I, and O I in the local ISM are studied us ing high-resolution spectra of four hot white dwarfs. The spectra of GD 246, WD 2331$-$475, HZ 21, and Lan 23 were obtained with the {\it Far Ultraviolet…

The Milky Way is surrounded by dozens of ultra-faint (< $10^5$ solar luminosities) dwarf satellite galaxies. They are the surviving remnants of the earliest galaxies, as confirmed by their ancient (~13 billion years old) and chemically…

Atomic ionised regions with strong continuum emission are often associated with regions of high-mass star formation and low-frequency (<2GHz) observations of these regions are needed to help build star formation models. The region toward…

Astrophysics of Galaxies · Physics 2021-12-08 Chenoa D. Tremblay , Tyler L. Bourke , James A. Green , John M. Dickey , O. Ivy Wong , Tim J. Galvin

We use the second Gaia data release to investigate the kinematics of 17 ultra-faint dwarf galaxies (UFDs) and 154 globular clusters (GCs) in the Milky Way, focusing on the differences between static and evolving models of the Galactic…

Astrophysics of Galaxies · Physics 2020-12-08 Benjamin M. Armstrong , Kenji Bekki , Aaron D. Ludlow

We present a multiwavelength study of the extended green object, G12.42+0.50 in this paper. The associated ionized, dust, and molecular components of this source are studied in detail employing various observations at near-, mid- and…

Astrophysics of Galaxies · Physics 2019-02-27 Namitha Issac , Anandmayee Tej , Tie Liu , Watson Varricatt , Sarita Vig , Ishwara Chandra C. H. , Mathias Schultheis

We present a homogeneous set of accurate atmospheric parameters for a complete sample of very and extremely metal-poor stars in the dwarf spheroidal galaxies (dSphs) Sculptor, Ursa Minor, Sextans, Fornax, Bo\"otes I, Ursa Major II, and Leo…

Solar and Stellar Astrophysics · Physics 2017-08-30 L. Mashonkina , P. Jablonka , Yu. Pakhomov , T. Sitnova , P. North
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