An INFRARED SPACE OBSERVATORY Upper Limit to the Low-Mass Star Halo in the Edge-on Galaxy NGC 4565

October 1999 • 1999ApJ...523..559B

Authors • Beichman, Charles • Helou, George • Van Buren, Dave • Ganga, Ken • Desert, F. X.

Abstract • We present deep ISOCAM observations taken at 4.5 μm (LW1) in search of a faint halo surrounding the edge-on spiral galaxy NGC 4565. Such a halo might exist if the massive halo that is needed to explain the flat rotation curve of this galaxy were attributable to a population of faint, red objects. The upper limit, 5.4 kJy sr^-1 (3 σ) at 20 kpc, reported here excludes a halo consisting of late-M dwarfs distributed in a spherical halo but not of lower luminosity brown dwarf stars.

Links

• SIMBAD http://simbad.u-strasbg.fr/simbo.pl?bibcode=1999ApJ...523..559B
• NED https://ned.ipac.caltech.edu/uri/NED::InRefcode/1999ApJ...523..559B
• DATA http://nida.esac.esa.int/nida-cl-web/?ACTION=OBSERVATION&ID=18401808
• DATA http://nida.esac.esa.int/nida-cl-web/?ACTION=OBSERVATION&ID=18401809
• DATA http://nida.esac.esa.int/nida-cl-web/?ACTION=OBSERVATION&ID=18401810
• DATA http://nida.esac.esa.int/nida-cl-web/?ACTION=OBSERVATION&ID=18401811
• DATA http://nida.esac.esa.int/nida-cl-web/?ACTION=OBSERVATION&ID=22100520
• DATA http://nida.esac.esa.int/nida-cl-web/?ACTION=OBSERVATION&ID=22100521
• DATA http://nida.esac.esa.int/nida-cl-web/?ACTION=OBSERVATION&ID=22100522
• DATA http://nida.esac.esa.int/nida-cl-web/?ACTION=OBSERVATION&ID=22100523
• DATA http://nida.esac.esa.int/nida-cl-web/?ACTION=OBSERVATION&ID=22100614
• DATA http://nida.esac.esa.int/nida-cl-web/?ACTION=OBSERVATION&ID=22100615
• DATA http://nida.esac.esa.int/nida-cl-web/?ACTION=OBSERVATION&ID=22100616
• DATA http://nida.esac.esa.int/nida-cl-web/?ACTION=OBSERVATION&ID=22100617
• DATA http://nida.esac.esa.int/nida-cl-web/?ACTION=OBSERVATION&ID=22100702
• DATA http://nida.esac.esa.int/nida-cl-web/?ACTION=OBSERVATION&ID=22100703
• DATA http://nida.esac.esa.int/nida-cl-web/?ACTION=OBSERVATION&ID=22100704
• DATA http://nida.esac.esa.int/nida-cl-web/?ACTION=OBSERVATION&ID=22100705
• ELECTR https://doi.org/10.1086%2F307751