Results 31 to 40 of about 80,653 (165)

Repeating Nuclear Transients From Repeating Partial Tidal Disruption Events

Astronomische Nachrichten, EarlyView.
ABSTRACT Extragalactic nuclear transients that exhibit repeating outbursts can be modeled as the repeated dynamical interaction between bound stars and supermassive black holes (SMBHs). A subset of these transients, with recurrence timescales of months‐to‐years, have been explained as accretion flares from the repeated tidal stripping of a star by an ...
Ananya Bandopadhyay, Eric R. Coughlin, Julia Fancher, C. J. Nixon, Dheeraj R. Pasham   +4 more
wiley   +1 more source

UGC8802: A MASSIVE DISK GALAXY IN FORMATION [PDF]

The Astrophysical Journal, 2010
12 pages, 10 figures, accepted for publication in ApJ, typo ...
Moran, Sean M., Kauffmann, Guinevere, Heckman, Timothy M., Gracia-Carpio, Javier, Saintonge, Amelie, Catinella, Barbara, Wang, Jing, Chen, Yan-Mei, Tacconi, Linda, Schiminovich, David, Cox, Pierre, Giovanelli, Riccardo, Haynes, Martha, Kramer, Carsten   +13 more
openaire   +4 more sources

Declining rotation curves at $z=2$ in $\Lambda$CDM galaxy formation simulations

, 2018
Selecting disk galaxies from the cosmological, hydrodynamical simulation Magneticum Pathfinder we show that almost half of our poster child disk galaxies at $z=2$ show significantly declining rotation curves and low dark matter fractions, very similar to
Arth, Alexander, Burkert, Andreas, Dolag, Klaus, Obreja, Aura, Remus, Rhea-Silvia, Schulze, Felix, Teklu, Adelheid F.   +6 more
core   +1 more source

Quantifying the Impact of Relativistic Precession on Tidal Disruption Event Light Curves

Astronomische Nachrichten, EarlyView.
ABSTRACT The tidal field of a black hole can turn a star into a gas stream whose orbit can precess, especially if the a black hole is rapidly spinning. In this work, we investigate the impact of precession on the light curves of tidal disruption events (TDE).
Diego Calderón, Ondřej Pejcha, Brian D. Metzger, Paul C. Duffell, Stephan Rosswog   +4 more
wiley   +1 more source

Formation and Evolution of Disk Galaxies [PDF]

Proceedings of the International Astronomical Union, 2003
AbstractGlobal star formation is the key to understanding galaxy disk formation. This in turn depends on gravitational instability of disks and continuing gas accretion as well as minor merging. A key component is feedback from supernovae. Primary observational constraints on disk galaxy formation and evolution include the Schmidt-Kennicutt law, the ...
openaire   +4 more sources

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

Astronomische Nachrichten, EarlyView.
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

THE OPACITY OF SPIRAL GALAXY DISKS [PDF]

, 2007
The opacity of foreground spiral disks can be probed from the number of distant galaxies seen through them. To calibrate this number for effects other than the dust extinction, Gonzalez et al. (1998) developed the "Synthetic Field Method". A synthetic field is an extincted Hubble Deep Field added to the science field.
Holwerda, Benne W., González, R. A., Allen, Ronald J., Van Der Kruit, P. C.   +3 more
openaire   +1 more source

On the evolution of disk galaxies [PDF]

Publications of the Astronomical Society of the Pacific, 1991
galaxies is presented. A numerical code that simulates the gravitatIonal contraction of a galaxy since the protogalactic phase has been developed. The models are based on a balance between the turbulent energy dissipation of the gas and the energy input from supernovae, the star formation being regulated by the gas conditions through Schmidt's law. The
C. Firmani, A. Miranda, A. Tutukov
openaire   +1 more source

Connecting Angular Momentum and Galactic Dynamics: The complex Interplay between Spin, Mass, and Morphology

, 2015
The evolution and distribution of the angular momentum of dark matter (DM) halos have been discussed in several studies over the past decades. In particular, the idea arose that angular momentum conservation should allow to infer the total angular ...
Beck, A. M., Burkert, A., Dolag, K., Remus, R. -S., Schmidt, A. S., Schulze, F., Steinborn, L. K., Teklu, A. F.   +7 more
core   +1 more source

Germanium‐Based Mid‐Infrared Integrated Photonics

Laser &Photonics Reviews, EarlyView.
The mid‐infrared (mid‐IR) spectral range is a part of the electromagnetic spectrum in which most of the molecules have vibrational and rotational resonances. Photonics integration in this wavelength range have thus seen a burst of interest in the recent years, mainly driven by applications related with the detection of chemical and biological ...
Delphine Marris‐Morini, Goran Z. Mashanovich, Milos Nedeljkovic, Carlos Alonso‐Ramos, Laurent Vivien, Jacopo Frigerio, Giovanni Isella   +6 more
wiley   +1 more source