Results 21 to 30 of about 169 (167)

THE X-RAY LUMINOSITY FUNCTION OF M37 AND THE EVOLUTION OF CORONAL ACTIVITY IN LOW-MASS STARS [PDF]

The Astrophysical Journal, 2016
ABSTRACT We use a 440.5 ks Chandra observation of the ≈500 Myr old open cluster M37 to derive the X-ray luminosity functions of its ≤1.2  stars. Combining detections of 162 M37 members with upper limits for 160 non-detections, we find that its G, K, and M stars have a ...
Alejandro Núñez, Marcel A. Agüeros
openaire   +3 more sources

The Luminosity and Mass Function of the Trapezium Cluster: From B Stars to the Deuterium‐burning Limit [PDF]

The Astrophysical Journal, 2002
74 pages, 30 figures, AASTeX5.0. To be published in the 01 July 2002 ApJ. For color version of figure 1 and online data table see http://www.astro.ufl.edu/~muench/PUB/publications ...
Muench, A., Lada, E., Lada, C., Alves, J.   +3 more
openaire   +2 more sources

ACS imaging of star clusters in M 51 [PDF]

Astronomy & Astrophysics, 2008
15 pages, 9 figures, accepted for publication in Astronomy and Astrophysics, replaced equation ...
Haas, MR, Gieles, M, Scheepmaker, RA, Larsen, SS, Lamers, HJGLM   +4 more
openaire   +5 more sources

Luminosity functions for very low mass stars and brown dwarfs

The Astrophysical Journal, 1993
A theoretical investigation of the luminosity function for low-mass objects to constrain the stellar initial mass function at the low-mass end is reported. The ways in which luminosity functions for low-mass stars are affected by star formation histories, brown dwarf and premain-sequence cooling rates and main-sequence mass luminosity relations, and ...
Gregory Laughlin, Peter Bodenheimer
openaire   +1 more source

Galaxy And Mass Assembly: evolution of the Hα luminosity function and star formation rate density up to z < 0.35 [PDF]

Monthly Notices of the Royal Astronomical Society, 2013
Measurements of the low-z Halpha luminosity function have a large dispersion in the local number density of sources, and correspondingly in the SFR density. The possible causes for these discrepancies include limited volume sampling, biases arising from survey sample selection, different methods of correcting for dust obscuration and AGN contamination.
Gunawardhana, M.L.P., Hopkins, A.M., Bland-Hawthorn, J., Brough, S., Sharp, R., Loveday, J., Taylor, E., Jones, D.H., Lara-López, M.A., Bauer, A.E., Colless, M., Owers, M., Baldry, I.K., López-Sánchez, A.R., Foster, C., Bamford, S., Brown, M.J.I., Driver, S.P., Drinkwater, M.J., Liske, J., Meyer, M., Norberg, P., Robotham, A.S.G., Ching, J.H.Y., Cluver, M.E., Croom, S., Kelvin, L., Prescott, M., Steele, O., Thomas, D., Wang, L.   +30 more
openaire   +5 more sources

Study of the Gaia luminosity function of low-mass stars with the Besançon Galaxy Model

, 2022
{"references": ["Allard, F. et al. (2013), Memorie della Societa Astronomica Italiana Supplementi, 24, p. 128.", "Allen, P.R. et al. (2005), ApJ, 625, pp. 385\u2013397", "Amard, L. et al. (2019), A&A, 631, A77", "Astropy Collaboration et al. (2022),ApJ, 935, p. 167", "Aumer, M. and Binney, J.J. (2009), MNRAS, 397, pp.
Ravinet, Thomas, Lagarde, Nadège, Reylé, Céline, Amard, Louis, Van Grootel, Valérie   +4 more
openaire   +2 more sources

Mass segregation in young compact star clusters in the Large Magellanic Cloud - I. Data and luminosity functions [PDF]

Monthly Notices of the Royal Astronomical Society, 2002
19 pages, incl. 10 embedded postscript figures, MNRAS, resubmitted (referee's comments included)
de Grijs, R., Johnson, R. A., Gilmore, G. F., Frayn, C. M.   +3 more
openaire   +2 more sources

Scaleheights of low mass stars from the luminosity function of the local white dwarfs [PDF]

International Astronomical Union Colloquium, 1989
It is shown that a combination of the observed luminosity function of the local white dwarfs and the theoretical cooling rates of a typical white dwarf suggests an approximately constant rate of formation of the white dwarfs. This rate is found to be about a factor of three lower than the observed birthrate of their immediate progenitors.
openaire   +1 more source

Spheroid Luminosity and Mass Functions from Hubble Space Telescope Star Counts [PDF]

The Astrophysical Journal, 1998
We analyze 166 spheroid subdwarfs found in 53 -elds observed with the Wide Field (6.5 \ M V \ 14.5) Planetary Camera on the Hubble Space T elescope. The -elds cover 221 arcmin2 over a wide range of directions. The spheroid luminosity function (LF) is inconsistent at about the 3 p level with the local spheroid LF of Dahn et al.
Gould, Andrew, Flynn, Chris, Bahcall, John N.   +2 more
openaire   +2 more sources

Functional comparison of EncB and EncC cargo proteins in iron storage within the Myxococcus xanthus encapsulin

FEBS Letters, EarlyView.
Encapsulins are protein nanocompartments that play an important role in iron storage. In the Myxococcus xanthus encapsulin system, two cargo proteins called EncB and EncC contribute to iron mineralization. Here, we show that EncB and EncC generate iron‐containing minerals with distinct chemical compositions, suggesting that the composition of stored ...
Harry B. McDowell, Thomas Walther, Egbert Hoiczyk   +2 more
wiley   +1 more source