M100 Band3

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M100 Introduction Page.

Science Target Overview

M100 (NGC 4321; RA 12h 22m 54.8s, Dec +15 49' 19") is a nearby (~16 Mpc) 'grand-design' barred spiral galaxy in the Virgo cluster. It has long spiral arms dominating its optical disk and an abundance of molecular gas in its center. It has a relatively face-on inclination of ~30 degrees.

In the 1990s, M100 was mapped at an angular resolution of 6" using the Berkeley-Illinois-Maryland Association (BIMA) millimeter interferometer as part of the BIMA SONG survey (Regan et al. 2001; Helfer et al. 2003; Sheth et al. 2002). Using the Nobeyama mm-wave Array (NMA), the central 1' was mapped by Sakamoto et al. (1995, 1999) at 2.5" resolution. Its nucleus has also been mapped in CO using the IRAM interferometer (Garcia-Burillo et al. 1998).

ALMA Data Overview

12-m Data

ALMA Science Verification data at Band 3 was taken for M100 with the ALMA 12-m array on DATES. The observations consisted of DETAILS TO GO HERE.

Morita array (ACA) 7-m Data

ALMA Science Verification data at Band 3 was taken for M100 with the ACA on DATES. The observations consisted of an X pointing mosaic centered at RA=, Dec=’’ as shown in Figure 1.

A scheduling block about X hours long was run six times for a total of about 3.5 hours of observing time. The integration time of each visibility is X seconds, and the total on-source time of of each pointing is X minutes.

The names of the six datasets are as follows:

• uid___A002_X5e971a_X124
• uid___A002_X5e971a_X2e7
• uid___A002_X5e9ff1_X3f3
• uid___A002_X5e9ff1_X5b3
• uid___A002_X60b415_X44
• uid___A002_X62f759_X4eb

DETAILS OF OBSERVATIONS TO GO HERE.

Single-Dish Data

ALMA Science Verification Single-Dish (12-m antennas) data at Band 3 was taken for M100 on DATES. The observations consisted of DETAILS TO GO HERE.

Acknowledgements and Data Usage

Using the data for publication: The following statement should be included in the acknowledgment of papers using the datasets listed above: “This paper makes use of the following ALMA data: ADS/JAO.ALMA#2011.0.00004.SV . ALMA is a partnership of ESO (representing its member states), NSF (USA) and NINS (Japan), together with NRC (Canada) and NSC and ASIAA (Taiwan), in cooperation with the Republic of Chile. The Joint ALMA Observatory is operated by ESO, AUI/NRAO and NAOJ."

We thank the following people for suggesting M100 for ALMA Science Verification: Preben Grosbol and Catherine Vlahakis.

Obtaining the Data

To download all the data, follow one of the next links:

North America

Europe

East Asia

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