Results 11 to 20 of about 18,267 (299)

Outshining by Recent Star Formation Prevents the Accurate Measurement of High-z Galaxy Stellar Masses [PDF]

The Astrophysical Journal
We demonstrate that the inference of galaxy stellar masses via spectral energy distribution (SED) fitting techniques for galaxies formed in the first billion years after the Big Bang carries fundamental uncertainties owing to the loss of star formation ...
Desika Narayanan, Sidney Lower, Paul Torrey, Gabriel Brammer, Weiguang Cui, Romeel Davé, Kartheik G. Iyer, Qi Li, Christopher C. Lovell, Laura V. Sales, Daniel P. Stark, Federico Marinacci, Mark Vogelsberger   +12 more
doaj   +3 more sources

Stellar Mass Calibrations for Local Low-mass Galaxies

The Astrophysical Journal
The stellar masses of galaxies are measured from integrated light via several methods—however, few of these methods were designed for low-mass ( M _⋆ ≲ 10 ^8 M _⊙ ) “dwarf” galaxies, whose properties (e.g., stochastic star formation, low metallicity ...
Mithi A. C. de los Reyes, Yasmeen Asali, Risa H. Wechsler, Marla Geha, Yao-Yuan Mao, Erin Kado-Fong, Ragadeepika Pucha, William Grant, Pratik J. Gandhi, Viraj Manwadkar, Anna Engelhardt, Ferah Munshi, Yunchong Wang   +12 more
doaj   +3 more sources

Variation in the stellar mass function along stellar streams [PDF]

Monthly Notices of the Royal Astronomical Society, 2021
ABSTRACT Stellar streams are the inevitable end product of star cluster evolution, with the properties of a given stream being related to its progenitor. We consider how the dynamical history of a progenitor cluster, as traced by the evolution of its stellar mass function, is reflected in the resultant stream.
Jeremy J Webb, Jo Bovy
openaire   +2 more sources

Dynamical masses and stellar evolutionary model predictions of M stars [PDF]

, 2021
In this era of Gaia and ALMA, dynamical stellar mass measurements, derived from spatially and spectrally resolved observations of the Keplerian rotation of circumstellar disks, provide benchmarks that are independent of observations of stellar ...
Huang, Jane, Öberg, Karin I., Wilner, David J., Guzmán, Viviana V., Andrews, Sean M., Herczeg, Gregory J., Teague, Richard, Bergner, Jennifer B., Czekala, Ian, Pegues, Jamila, Long, Feng, Ilsedore Cleeves, L.   +11 more
core   +2 more sources

Stellar coronal mass ejections

Serbian Astronomical Journal, 2022
Stellar coronal mass ejections (CMEs) are a growing research field, especially during the past decade. The large number of so far detected exoplanets raises the open question for the CME activity of stars, as CMEs may strongly affect exoplanetary atmospheres.
Leitzinger M., Odert P.
openaire   +3 more sources

Stellar mass as the ‘glocal’ driver of galaxies’ stellar population properties [PDF]

Monthly Notices of the Royal Astronomical Society, 2022
ABSTRACT The properties of the stellar populations in a galaxy are known to correlate with the amount and the distribution of stellar mass. We take advantage of the maps of light-weighted mean stellar age $\mathit {\mathrm{ Age}_{\mathrm{ wr}}}$ and metallicity $\mathit {\mathrm{ Z}_{*\mathrm{ wr}}}$ for a sample of 362 galaxies from the
Stefano Zibetti, Anna R Gallazzi
openaire   +3 more sources

THE MASS DISTRIBUTION OF STELLAR-MASS BLACK HOLES [PDF]

The Astrophysical Journal, 2011
We perform a Bayesian analysis of the mass distribution of stellar-mass black holes using the observed masses of 15 low-mass X-ray binary systems undergoing Roche lobe overflow and five high-mass, wind-fed X-ray binary systems. Using Markov Chain Monte Carlo calculations, we model the mass distribution both parametrically---as a power law, exponential,
Farr, Will M., Sravan, Niharika, Cantrell, Andrew G., Kreidberg, Laura, Bailyn, Charles D., Mandel, Ilya, Kalogera, V.   +6 more
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Star formation and the origin of stellar masses [PDF]

Nature, 1992
AbstractWe present a new model to explain stellar mass distributions in different stellar environments. In our model, the protostar phase is terminated, when the protostellar core embedded in a molecular clump experiences a collision with another star or protostellar clump, which ejects the protostellar core from its parent clump.
Podsiadlowski, P, Price, N
openaire   +2 more sources

ON THE ORIGIN OF STELLAR MASSES [PDF]

The Astrophysical Journal, 2011
It has been a longstanding problem to determine, as far as possible, the characteristic masses of stars in terms of fundamental constants; the almost complete invariance of this mass as a function of the star-forming environment suggests that this should be possible. Here I provide such a calculation.
openaire   +3 more sources

Early assembly of the most massive galaxies [PDF]

, 2009
The current consensus is that galaxies begin as small density fluctuations in the early Universe and grow by in situ star formation and hierarchical merging(1).
Chris A. Collins, Scott T Kay (16045382), Nicola Mehrtens (16047884), Ed Lloyd-Davies, Hoyle, Ben, Hosmer, Mark, Christopher J. Miller, Ben Hoyle, Mehrtens, Nicola, Robert G. Mann, Pedro T. P. Viana, Martin Sahlén (267044), S Adam Stanford (16061237), Mark Hosmer (16070585), Robert C Nichol (16067396), John P Stott (16070582), Martin Sahlén, Sahlen, Martin, John P. Stott, Kathy Romer (4460893), Matt Hilton (6956609), Viana, Pedro T. P., Mann, Robert G., Ben Hoyle (6914513), Stott, John P., Matt Hilton, Robert G Mann (7965452), Andrew Liddle, Stanford, S. Adam, Christopher J Miller (16070591), A. Kathy Romer, Davidson, Michael, Ed Lloyd-Davies (16075100), Romer, A. Kathy, Robert C. Nichol, Andrew Liddle (16042793), Pedro T P Viana (16045379), Nichol, Robert C., Kay, Scott T., Michael J. West, Chris A Collins (16061234), Scott T. Kay, Collins, Chris A., Michael Davidson, Mark Hosmer, West, Michael J., Michael Davidson (699678), S. Adam Stanford, Michael J West (5524436), Liddle, Andrew, Nicola Mehrtens, Miller, Christopher J., Hilton, Matt, Lloyd-Davies, Ed   +53 more
core   +1 more source