Results 11 to 20 of about 52,093 (177)

Star Formation Variability as a Probe for the Baryon Cycle within Galaxies

The Astrophysical Journal, 2023
We investigate the connection between the regulation of star formation and the cycling of baryons both within and in and out of galaxies. We use idealized numerical simulations of Milky Way–mass galaxies, in which we vary the galaxy morphology and ...
Eun-jin Shin, Sandro Tacchella, Ji-hoon Kim, Kartheik G. Iyer, Vadim A. Semenov   +4 more
doaj   +1 more source

Sgr A* Spin and Mass Estimates through the Detection of an Extremely Large Mass-ratio Inspiral

The Astrophysical Journal, 2023
Estimating the spin of Sagittarius A* (Sgr A*) is one of the current challenges we face in understanding the center of our Galaxy. In the present work, we show that detecting the gravitational waves (GWs) emitted by a brown dwarf inspiraling around Sgr A*
Verónica Vázquez-Aceves, Yiren Lin, Alejandro Torres-Orjuela   +2 more
doaj   +1 more source

Systematic uncertainties in the determination of the local dark matter density [PDF]

, 2010
A precise determination of the local dark matter density and an accurate control over the corresponding uncertainties are of paramount importance for Dark Matter (DM) searches.
Ben Moore, Gianfranco Bertone, Miguel Pato, Oscar Agertz, P. B. Tissera, Romain Teyssier, S. D. M. White   +6 more
core   +2 more sources

The origin of the Milky Way globular clusters [PDF]

, 2016
We present a cosmological zoom-in simulation of a Milky Way-like galaxy used to explore the formation and evolution of star clusters. We investigate in particular the origin of the bimodality observed in the colour and metallicity of globular clusters ...
Agertz, Oscar, Gieles, Mark, Renaud, Florent   +2 more
core   +2 more sources

The shapes of Milky Way satellites: looking for signatures of tidal stirring [PDF]

, 2012
We study the shapes of Milky Way satellites in the context of the tidal stirring scenario for the formation of dwarf spheroidal galaxies. The standard procedures used to measure shapes involve smoothing and binning of data and thus may not be sufficient ...
Carlin, Jeffrey L., Kazantzidis, Stelios, Lokas, Ewa L., Majewski, Steven R., Mayer, Lucio, Moustakas, Leonidas A., Nidever, David L.   +6 more
core   +1 more source

A Physical Interpretation of Milky Way Galaxy Dynamics from Precision Astrometrics

, 2020
The dynamical and virial mass of the Milky Way galaxy is estimated using latest high precision stellar halo and dwarf galaxy satellite kinematics. The new data suggest the Galaxy is a highly compact, classically thermalized object. Kinematics exhibit significant velocity-spatial substructure, distinctive dynamic partitions, and strong Keplerian ...
openaire   +2 more sources

Two chemically similar stellar overdensities on opposite sides of the plane of the Galaxy [PDF]

, 2018
Our Galaxy is thought to have undergone an active evolutionary history dominated by star formation, the accretion of cold gas, and, in particular, mergers up to 10 gigayear ago.
A Helmi, A Helmi, A Kunder, A Mucciarelli, A Smette, AA Sheffield, Adrian M. Price-Whelan, Aldo M. Serenelli, Allyson Sheffield, AM Amarsi, AM Price-Whelan, AM Serenelli, Andrew Gould, B Gustafsson, B Lemasle, B Letarte, Branimir Sesar, CE Dorman, Chervin F. P. Laporte, CW Purcell, D Yong, E Stonkute, E Tolstoy, EF Bell, EN Kirby, FA Gómez, GR Ruchti, HJ Rocha-Pinto, J Bovy, JA Valenti, JE Lawler, JG Cohen, JS Bullock, Judith G. Cohen, K Freeman, K Lind, K Lind, Kathryn V. Johnston, KV Johnston, L Casagrande, L Casagrande, L Magrini, L Sbordone, Luca Casagrande, M Asplund, M Bergemann, M Bergemann, M Bergemann, M Odenkirchen, M Shetrone, M Van Hove, Maria Bergemann, MW Feast, NF Martin, P Villemoes, P Villemoes, PE Nissen, PF Weck, PJ Storey, R Gratton, R Schönrich, Ralph Schönrich, RE Silverans, S Kazantzidis, S Sharma, SA Korotin, SS Vogt, SV Ramírez, T Bensby, Ting S. Li, TS Li, V Kovtyukh, W Freudling, XX Xue, Y Xu   +74 more
core   +3 more sources

Connecting star formation in the Milky Way and nearby galaxies – I. Comparability of molecular cloud physical properties

Monthly Notices of the Royal Astronomical Society
ABSTRACT We used CO (2–1) and CO (1–0) data cubes to identify molecular clouds and study their kinematics and dynamics in three nearby galaxies and the inner Milky Way. When observed at similar spatial and velocity resolutions, molecular clouds in the same mass range across these galaxies show broadly comparable physical properties ...
J W Zhou, Sami Dib
openaire   +2 more sources

Gas Loss by Ram Pressure Stripping and Internal Feedback From Low Mass Milky Way Satellites

, 2016
The evolution of dwarf satellites of the Milky Way is affected by the combination of ram pressure and tidal stripping, and internal feedback from massive stars.
Emerick, Andrew, Gatto, Andrea, Grcevich, Jana, Mac Low, Mordecai-Mark   +3 more
core   +1 more source

Kinematical & Chemical Characteristics of the Thin and Thick Disks [PDF]

, 2008
I discuss how the chemical abundance distributions, kinematics and age distributions of stars in the thin and thick disks of the Galaxy can be used to decipher the merger history of the Milky Way, a typical large galaxy. The observational evidence points
Cayrel, Famaey, Feltzing, Hill, Matteucci, Momany, Nordström, Rosemary F. G. Wyse, Schuster, Sellwood, Wyse, Wyse, Zoccali   +12 more
core   +1 more source