US 3215: An active gE2 galaxy

Steve B. Howell, Joseph E. Pesce, J. J. Condon, Robin Bruce Ciardullo, P. D. Usher

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The object US 3215 is an optically variable galaxy with very broad Balmer lines, relatively strong forbidden lines, and a weak UV-excess continuum. It has been classed as a Seyfert 1 galaxy. We report that optical CCD images taken in excellent seeing reveal a central miniquasar in an elliptical galaxy with a de Vaucouleurs profile extending across an angular diameter of ∼ 13 arcsec. This corresponds to a linear size of almost 50 kpc (H0 = 50 km s-1 Mpc-1). Our data indicate that the host galaxy is of type gE2 and is the gravitational center of a cluster of galaxies. A companion galaxy is observed at a projected distance of 24 kpc. H and K magnitudes were obtained and the index H-K is consistent with quasar colors. A VLA snapshot at 1425 MHz gives an upper limit to radio emission at a flux level of 0.2 mJy beam-1 that is consistent with the Sy 1 designation. Thus US 3215 appears to be an active broad-line cluster gE2 galaxy.

Original languageEnglish (US)
Pages (from-to)1149-1153
Number of pages5
JournalPublications of the Astronomical Society of the Pacific
Volume109
Issue number740
DOIs
StatePublished - Jan 1 1997

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active galaxies
radio
galaxies
elliptical galaxies
radio emission
quasars
index
charge coupled devices
continuums
color
profiles

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Howell, S. B., Pesce, J. E., Condon, J. J., Ciardullo, R. B., & Usher, P. D. (1997). US 3215: An active gE2 galaxy. Publications of the Astronomical Society of the Pacific, 109(740), 1149-1153. https://doi.org/10.1086/133988
Howell, Steve B. ; Pesce, Joseph E. ; Condon, J. J. ; Ciardullo, Robin Bruce ; Usher, P. D. / US 3215 : An active gE2 galaxy. In: Publications of the Astronomical Society of the Pacific. 1997 ; Vol. 109, No. 740. pp. 1149-1153.
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Howell, SB, Pesce, JE, Condon, JJ, Ciardullo, RB & Usher, PD 1997, 'US 3215: An active gE2 galaxy', Publications of the Astronomical Society of the Pacific, vol. 109, no. 740, pp. 1149-1153. https://doi.org/10.1086/133988

US 3215 : An active gE2 galaxy. / Howell, Steve B.; Pesce, Joseph E.; Condon, J. J.; Ciardullo, Robin Bruce; Usher, P. D.

In: Publications of the Astronomical Society of the Pacific, Vol. 109, No. 740, 01.01.1997, p. 1149-1153.

Research output: Contribution to journalArticle

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T2 - An active gE2 galaxy

AU - Howell, Steve B.

AU - Pesce, Joseph E.

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N2 - The object US 3215 is an optically variable galaxy with very broad Balmer lines, relatively strong forbidden lines, and a weak UV-excess continuum. It has been classed as a Seyfert 1 galaxy. We report that optical CCD images taken in excellent seeing reveal a central miniquasar in an elliptical galaxy with a de Vaucouleurs profile extending across an angular diameter of ∼ 13 arcsec. This corresponds to a linear size of almost 50 kpc (H0 = 50 km s-1 Mpc-1). Our data indicate that the host galaxy is of type gE2 and is the gravitational center of a cluster of galaxies. A companion galaxy is observed at a projected distance of 24 kpc. H and K magnitudes were obtained and the index H-K is consistent with quasar colors. A VLA snapshot at 1425 MHz gives an upper limit to radio emission at a flux level of 0.2 mJy beam-1 that is consistent with the Sy 1 designation. Thus US 3215 appears to be an active broad-line cluster gE2 galaxy.

AB - The object US 3215 is an optically variable galaxy with very broad Balmer lines, relatively strong forbidden lines, and a weak UV-excess continuum. It has been classed as a Seyfert 1 galaxy. We report that optical CCD images taken in excellent seeing reveal a central miniquasar in an elliptical galaxy with a de Vaucouleurs profile extending across an angular diameter of ∼ 13 arcsec. This corresponds to a linear size of almost 50 kpc (H0 = 50 km s-1 Mpc-1). Our data indicate that the host galaxy is of type gE2 and is the gravitational center of a cluster of galaxies. A companion galaxy is observed at a projected distance of 24 kpc. H and K magnitudes were obtained and the index H-K is consistent with quasar colors. A VLA snapshot at 1425 MHz gives an upper limit to radio emission at a flux level of 0.2 mJy beam-1 that is consistent with the Sy 1 designation. Thus US 3215 appears to be an active broad-line cluster gE2 galaxy.

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