Results 51 to 60 of about 382 (184)

Balmer Absorption in Iron Low-ionization Broad Absorption Line Quasars

The Astrophysical Journal
While C iv is the most common absorption line in broad absorption line quasar spectra, Balmer absorption lines (BALs) are among the rarest. We present analysis of Balmer absorption in a sample of 14 iron low-ionization BAL quasars (FeLoBALQs); eight are ...
Karen M. Leighly, Sarah C. Gallagher, Hyunseop Choi, Donald M. Terndrup, Julianna R. Voelker, Gordon T. Richards, Leah K. Morabito   +6 more
doaj   +1 more source

Minimalist Footwear Acutely Alters Running Kinematics in Runners With Medial Tibial Stress Syndrome

Arthroscopy, Sports Medicine, and Rehabilitation, Volume 8, Issue 3, June 2026.
Purpose To assess immediate biomechanical changes in runners with medial tibial stress syndrome (MTSS) when transitioning from standard to minimalist running shoes. Methods Active runners diagnosed with MTSS ran on a treadmill at 10 km/h using standard and minimalist running shoes. Hip, knee, and ankle joint kinematics were captured using a 16‐infrared‐
Quyet Thang Nguyen, My T. Than, Minh Ho Ngoc, Ngoc‐Tram Nguyen, Nam Vu Tu, Tien Quang Tran, Dung Tran Trung   +6 more
wiley   +1 more source

X-Ray Insights into the Nature of Quasars with Redshifted Broad Absorption Lines [PDF]

The Astrophysical Journal, 2017
Abstract We present Chandra observations of seven broad absorption line (BAL) quasars at with redshifted BAL troughs (RSBALs). Five of our seven targets were detected by Chandra in 4–13 ks exposures with ACIS-S. The
Ning-Xiao Zhang, W. N. Brandt, N. S. Ahmed, P. B. Hall, B. Luo, Scott F. Anderson, N. Filiz Ak, P. Petitjean, D. P. Schneider, Yue Shen, R. Srianand   +10 more
openaire   +5 more sources

AGN Feedback Efficiency of Narrow Absorption Line Quasars

The Astrophysical Journal
We consider if outflowing winds that are detected via narrow absorption lines (NALs) with FWHM of
Toru Misawa, Jane C. Charlton, Michael Eracleous   +2 more
doaj   +1 more source

Hidden No More: Spotlight on Tidal Disruption Events in Active Galactic Nuclei

Astronomische Nachrichten, Volume 347, Issue 5, June 2026.
ABSTRACT Tidal disruption events (TDEs) are typically discovered in previously quiescent galaxies. However, earlier studies have revealed a handful of TDEs occurring in pre‐existing active galactic nuclei (AGN). We discuss AT2019aalc, a promising TDE candidate in an AGN, and compare it to similar sources.
Patrik Milán Veres
wiley   +1 more source

Low-ionization broad absorption lines in quasars

The Astrophysical Journal, 1993
The absorption line properties of six Mg II broad absorption line quasars (BALQs) are examined using a BALQ sample of Weymann et al. (1991). It is found that Al III absorption is always stronger than Al II absorption; C IV absorption tends to be very deep and broad; and low ionization absorption tends to be narrower and lie at the low velocity end of ...
G. M. Voit, Ray J. Weymann, Kirk T. Korista   +2 more
openaire   +1 more source

THE LONG-TERM X-RAY VARIABILITY OF BROAD ABSORPTION LINE QUASARS [PDF]

The Astrophysical Journal, 2012
We analyze the long-term (rest-frame 3-30 yr) X-Ray variability of eleven broad absorption line (BAL) quasars, mainly to constrain the variation properties of the X-Ray absorbing shielding gas that is thought to play a critical role in BAL wind launching. Our BAL quasar sample has coverage with multiple X-ray observatories including Chandra, XMM-Newton,
Saez, C., Brandt, W. N., Gallagher, S. C., Bauer, F. E., Garmire, G. P.   +4 more
openaire   +7 more sources

The Fraction and Kinematics of Broad Absorption Line Quasars across Cosmic Time

The Astrophysical Journal, 2023
Luminous quasars are powerful targets to investigate the role of feedback from supermassive black holes (BHs) in regulating the growth phases of BHs themselves and of their host galaxies, up to the highest redshifts.
Manuela Bischetti, Fabrizio Fiore, Chiara Feruglio, Valentina D’Odorico, Nahum Arav, Tiago Costa, Kastytis Zubovas, George Becker, Sarah E. I. Bosman, Guido Cupani, Rebecca Davies, Anna-Christina Eilers, Emanuele Paolo Farina, Andrea Ferrara, Massimo Gaspari, Chiara Mazzucchelli, Masafusa Onoue, Enrico Piconcelli, Maria Vittoria Zanchettin, Yongda Zhu   +19 more
doaj   +1 more source

Triple‐Negative Breast Cancer Versus Non‐Triple‐Negative Breast Cancer: The Impact of Pd and Pt Complexes on Basal‐Like Triple‐Negative Breast Cancer

ChemMedChem, Volume 21, Issue 9, 14 May 2026.
The anticancer activity of the complexes Pd3Spd2, Pt3Spd2, Pt2Put2(NH3)4 and Pd2Put2 against human TNBC, non‐TNBC and healthy breast cells was evaluated. The metabolic impact of the most promising metal complexes—Pd3Spd2 and Pt2Put2(NH3)4—was further assessed using vibrational microspectroscopies, providing detailed insights into the drug‐induced ...
Clara B. Martins, Maria P. M. Marques, Luís A. E. Batista de Carvalho, Ana L. M. Batista de Carvalho   +3 more
wiley   +1 more source

The Frequency and Radio Properties of Broad Absorption Line Quasars [PDF]

The Astronomical Journal, 2003
A sample of 67 Broad Absorption Line quasars (BALQSOs) from the Large Bright Quasar Survey (LBQS) is used to estimate the observed and intrinsic fraction of BAL quasars in optically--selected samples at intermediate (B_J \simeq 18.5) magnitudes. The observed BALQSO fraction in the redshift range 1.5 < z < 3.0 is 15\pm3%.
Hewett, Paul C., Foltz, Craig B.
openaire   +2 more sources